Order this document by LM2931/D
LM2931
Series
LOW DROPOUT
VOLTAGE REGULATORS
Z SUFFIX
PLASTIC PACKAGE
CASE 29
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
DT1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Pin 1. Output
2. Ground
3. Input
Pin 1. Input
2. Ground
3. Output
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3
1
2
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
3
1
2
FIXED OUTPUT VOLTAGE
3
1
2
3
1
2
3
1
1
MOTOROLA ANALOG IC DEVICE DATA
Low Dropout
Voltage Regulators
The LM2931 series consists of positive fixed and adjustable output
voltage regulators that are specifically designed to maintain proper
regulation with an extremely low inputtooutput voltage differential. These
devices are capable of supplying output currents in excess of 100 mA and
feature a low bias current of 0.4 mA at 10 mA output.
Designed primarily to survive in the harsh automotive environment, these
devices will protect all external load circuitry from input fault conditions
caused by reverse battery connection, two battery jump starts, and
excessive line transients during load dump. This series also includes internal
current limiting, thermal shutdown, and additionally, is able to withstand
temporary powerup with mirrorimage insertion.
Due to the low dropout voltage and bias current specifications, the
LM2931 series is ideally suited for battery powered industrial and consumer
equipment where an extension of useful battery life is desirable. The `C'
suffix adjustable output regulators feature an output inhibit pin which is
extremely useful in microprocessorbased systems.
InputtoOutput Voltage Differential of < 0.6 V @ 100 mA
Output Current in Excess of 100 mA
Low Bias Current
60 V Load Dump Protection
50 V Reverse Transient Protection
Internal Current Limiting with Thermal Shutdown
Temporary MirrorImage Protection
Ideally Suited for Battery Powered Equipment
Economical 5Lead TO220 Package with Two Optional Leadforms
Available in Surface Mount SOP8, D2PAK and DPAK Packages
High Accuracy (
2%) Reference (LM2931AC) Available
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP8)
1
8
ADJUSTABLE
FIXED
(Top View)
N.C.
Gnd
Input
N.C.
Gnd
Output
1
8
5
4
(Top View)
Output
Inhibit
Gnd
Input
Adjust
Gnd
Output
1
8
5
4
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
T SUFFIX
PLASTC PACKAGE
CASE 314D
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
Heatsink surface connected to Pin 3.
Pin 1. Adjust
2. Output Inhibit
3. Ground
4. Input
5. Output
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3.
5
1
5
1
5
1
5
1
ADJUSTABLE OUTPUT VOLTAGE
(See Following Page for Ordering Information.)
Motorola, Inc. 1997
Rev 4
LM2931 Series
2
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
D
i
Output
C
P
k
Device
Voltage
Tolerance
Case
Package
LM2931AD5.0
5 0 V
3 8%
751
SOP8 Surface Mount
LM2931ADT5.0
5 0 V
3 8%
369A
Surface Mount DPAK
LM2931ADT15.0
5 0 V
38%
369
DPAK
LM2931AD2T5.0
5 0 V
3.8%
936
Surface Mount D2PAK
LM2931AT5.0
5 0 V
221A
TO220 Type
LM2931AZ5.0
5 0 V
29
TO92 Type
LM2931D5.0
5.0 V
5 0%
751
SOP8 Surface Mount
LM2931D2T5.0
5 0%
936
Surface Mount D2PAK
LM2931DT5.0
5 0%
369A
Surface Mount DPAK
LM2931DT15.0
5 0%
369
DPAK
LM2931T5.0
5 0%
221A
TO220 Type
LM2931Z5.0
5.0%
29
TO92 Type
LM2931CD
Adj
bl
751
SOP8 Surface Mount
LM2931CD2T
Adj
bl
936A
Surface Mount D2PAK
LM2931CT
Adjustable
314D
5Pin TO220 Type
LM2931CTH
j
314A
5Pin Horizontal Leadform
LM2931CTV
314B
5Pin Vertical Leadform
LM2931ACD
Adj
bl
2 0%
751
SOP8 Surface Mount
LM2931ACD2T
Adj
bl
2 0%
936A
Surface Mount D2PAK
LM2931ACT
Adjustable
2.0%
314D
5Pin TO220 Type
LM2931ACTH
314A
5Pin Horizontal Leadform
LM2931ACTV
314B
5Pin Vertical Leadform
Representative Schematic Diagram
*Deleted on Adjustable Regulators
Input
Output
30 k *
Adjust
92.8 k *
Ground
350
500
6.0 k
6.0
30 k
Output
Inhibit
EPI
Bias
50 k
5.8 V
10 k
11.5 k
3.0 k
3.94 k
30 k
30 k
180 k
184 k
6.8 V
35 k
48 k
This device contains 26 active transistors.
LM2931 Series
3
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage Continuous
VI
40
Vdc
Transient Input Voltage (
100 ms)
VI(
)
60
Vpk
Transient Reverse Polarity Input Voltage
VI(
)
50
Vpk
1.0% Duty Cycle,
100 ms
Power Dissipation
Case 29 (TO92 Type)
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
178
C/W
Thermal Resistance, JunctiontoCase
R
JC
83
C/W
Case 221A, 314A, 314B and 314D (TO220 Type)
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
65
C/W
Thermal Resistance, JunctiontoCase
R
JC
5.0
C/W
Case 369 and 369A (DPAK) [Note 1]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
92
C/W
Thermal Resistance, JunctiontoCase
R
JC
6.0
C/W
Case 751 (SOP8) [Note 2]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
160
C/W
Thermal Resistance, JunctiontoCase
R
JC
25
C/W
Case 936 and 936A (D2PAK) [Note 3]
TA = 25
C
PD
Internally Limited
W
Thermal Resistance, JunctiontoAmbient
R
JA
70
C/W
Thermal Resistance, JunctiontoCase
R
JC
5.0
C/W
Tested Operating Junction Temperature Range
TJ
40 to +125
C
Storage Temperature Range
Tstg
65 to +150
C
NOTES: 1. DPAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 24 for
board mounted Thermal Resistance.
2. SOP8 JunctiontoAmbient Thermal Resistance is for minimum recommended pad size. Refer
to Figure 23 for Thermal Resistance variation versus pad size.
3. D2PAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 25 for
board mounted Thermal Resistance.
4. ESD data available upon request.
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
Ch
i i
S
b l
LM29315.0
LM2931A5.0
U i
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
FIXED OUTPUT
Output Voltage
VO
V
Vin = 14 V, IO = 10 mA, TJ = 25
C
4.75
5.0
5.25
4.81
5.0
5.19
Vin = 6.0 V to 26 V, IO
100 mA, TJ = 40
to +125
C
4.50
5.50
4.75
5.25
Line Regulation
Regline
mV
Vin = 9.0 V to 16 V
2.0
10
2.0
10
Vin = 6.0 V to 26 V
4.0
30
4.0
30
Load Regulation (IO = 5.0 mA to 100 mA)
Regload
14
50
14
50
mV
Output Impedance
ZO
m
IO = 10 mA,
IO = 1.0 mA, f = 100 Hz to 10 kHz
200
200
Bias Current
IB
mA
Vin = 14 V, IO = 100 mA, TJ = 25
C
5.8
30
5.8
30
Vin = 6.0 V to 26 V, IO = 10 mA, TJ = 40
to +125
C
0.4
1.0
0.4
1.0
Output Noise Voltage (f = 10 Hz to 100 kHz)
Vn
700
700
Vrms
Long Term Stability
S
20
20
mV/kHR
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
LM2931 Series
4
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
Ch
i i
S
b l
LM29315.0
LM2931A5.0
U i
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
FIXED OUTPUT
Ripple Rejection (f = 120 Hz)
RR
60
90
60
90
dB
Dropout Voltage
VIVO
V
IO = 10 mA
0.015
0.2
0.015
0.2
IO = 100 mA
0.16
0.6
0.16
0.6
OverVoltage Shutdown Threshold
Vth(OV)
26
29.5
40
26
29.5
40
V
Output Voltage with Reverse Polarity Input (Vin = 15 V)
VO
0.3
0
0.3
0
V
ELECTRICAL CHARACTERISTICS
(Vin = 14 V, IO = 10 mA, CO = 100
F, CO(ESR) = 0.3
, TJ = 25
C [Note 1].)
LM2931C
LM2931AC
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Typ
Unit
ADJUSTABLE OUTPUT
Reference Voltage (Note 2, Figure 18)
Vref
V
IO = 10 mA, TJ = 25
C
1.14
1.20
1.26
1.17
1.20
1.23
IO
100 mA, TJ = 40 to +125
C
1.08
1.32
1.15
1.25
Output Voltage Range
VO range
3.0 to
24
2.7 to
29.5
3.0 to
24
2.7 to
29.5
V
Line Regulation (Vin = VO + 0.6 V to 26 V)
Regline
0.2
1.5
0.2
1.5
mV/V
Load Regulation (IO = 5.0 mA to 100 mA)
Regload
0.3
1.0
0.3
1.0
%/V
Output Impedance
ZO
m
/
V
IO = 10 mA,
IO = 1.0 mA, f = 10 Hz to 10 kHz
40
40
Bias Current
IB
mA
IO = 100 mA
6.0
6.0
IO = 10 mA
0.4
1.0
0.4
1.0
Output Inhibited (Vth(OI) = 2.5 V)
0.2
1.0
0.2
1.0
Adjustment Pin Current
IAdj
0.2
0.2
A
Output Noise Voltage (f = 10 Hz to 100 kHz)
Vn
140
140
Vrms/V
LongTerm Stability
S
0.4
0.4
%/kHR
Ripple Rejection (f = 120 Hz)
RR
0.10
0.003
0.10
0.003
%/V
Dropout Voltage
VIVO
V
IO = 10 mA
0.015
0.2
0.015
0.2
IO = 100 mA
0.16
0.6
0.16
0.6
OverVoltage Shutdown Threshold
Vth(OV)
26
29.5
40
26
29.5
40
V
Output Voltage with Reverse Polarity Input (Vin = 15 V)
VO
0.3
0
0.3
0
V
Output Inhibit Threshold Voltages
Vth(OI)
V
Output "On":
TJ = 25
C
2.15
1.90
2.15
1.90
TJ = 40
to +125
C
1.20
1.20
Output "Off":
TJ = 25
C
2.50
2.26
2.50
2.26
TJ = 40
to +125
C
3.25
3.25
Output Inhibit Threshold Current (Vth(OI) = 2.5 V)
Ith(OI)
30
50
30
50
A
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
LM2931 Series
5
MOTOROLA ANALOG IC DEVICE DATA
IO = 100 mA
IO = 10 mA
, OUTPUT
VOL
T
AGE
(V)
O
V
V
in
O
, DROPOUT
VOL
T
AGE (mV)
V
Vin, INPUT VOLTAGE (V)
20
10
0
10
20
30
40
50
60
0
1.0
2.0
3.0
4.0
5.0
6.0
Vout = 5.0 V
RL = 500
TA = 25
C
, OUTPUT
CURRENT
(mA)
O
Vin, INPUT VOLTAGE (V)
50
150
250
350
0
5.0
10
15
20
25
30
I
TJ = 40
C
TJ = 25
C
TJ = 85
C
V
in
(10 V/DIV)
V
O
(5.0 V/DIV)
0
0
t, TIME (50 ms/DIV)
, INPUT
VOL
T
AGE
, OUTPUT
VOL
T
AGE
, OUTPUT
VOL
T
AGE
(V)
O
Vin, INPUT VOLTAGE (V)
0
1.0
2.0
3.0
4.0
5.0
6.0
0
1.0
2.0
3.0
4.0
5.0
6.0
V
TJ, JUNCTION TEMPERATURE (
C)
0
100
200
300
0
25
50
75
100
125
IO = 50 mA
V
in
O
IO, OUTPUT CURRENT (mA)
0
20
40
60
80
100
0
40
80
120
160
200
Vin = 14 V
Vout = 100 mV
TJ = 25
C
, DROPOUT
VOL
T
AGE (mV)
V
Vout = 5.0 V
RL = 50
CO = 100
F
= 150 ms
TA = 25
C
VCC = 15 V
VFB1 = 5.05 V
Dashed lines below Vin = 5.0 V
are for Adjustable output devices only.
Figure 1. Dropout Voltage versus Output Current
Figure 2. Dropout Voltage versus
Junction Temperature
Figure 3. Peak Output Current versus Input Voltage
Figure 4. Output Voltage versus Input Voltage
Figure 5. Output Voltage versus Input Voltage
Figure 6. Load Dump Characteristics
Vin = 14 V
Vout = 100 mV
Vout = 5.0 V
TA = 25
C
RL = 50
IO = 100 mA
LM2931 Series
6
MOTOROLA ANALOG IC DEVICE DATA
I B
, BIAS CURRENT
(mA)
I B
, BIAS CURRENT
(mA)
I B
Vin, INPUT VOLTAGE (V)
0
2.0
4.0
6.0
8.0
10
12
20
10
0
10
20
30
40
50
60
RL = 50
, BIAS CURRENT
(mA)
TJ, JUNCTION TEMPERATURE (
C)
55
25
0
25
50
75
100
125
0
2.0
4.0
6.0
8.0
IO = 100 mA
RR, RIPPLE REJECTION RA
TIO (dB)
f, FREQUENCY (Hz)
55
65
75
85
95
10
100
1.0 k
1.0 M
10 M
CO(ESR) = 0.15
Tantulum
RR, RIPPLE REJECTION RA
TIO (dB)
85
95
0
20
40
60
80
100
IO, OUTPUT CURRENT (mA)
f, FREQUENCY (Hz)
, OUTPUT
IMPEDANCE (
)
O
0
0.4
0.8
1.2
1.6
2.0
10
100
1.0 k
10 k
100 k
1.0 M
10 M
I
CO(ESR) = 0.3
Electrolytic
CO(ESR) = 0.15
Tantulum
0
2.0
4.0
6.0
8.0
0
20
40
60
80
100
IO, OUTPUT CURRENT (mA)
IO = 0 mA
IO = 50 mA
Vout = 5.0 V
TJ = 25
C
Vin = 14 V
Vout = 5.0 V
IO = 10 mA
DIO = 1.0 mA
CO = 100
F
TJ = 25
C
Vin = 14 V
Vout = 5.0 V
65
75
Vin = 14 V
Vout = 5.0 V
f = 120 Hz
TJ = 25
C
Vin = 14 V
Vout = 5.0 V
DVin = 100 mV
RL = 500
CO = 100
F
TJ = 25
C
CO(ESR) = 0.3
Electrolytic
10 k
100 k
Figure 7. Bias Current versus Input Voltage
Figure 8. Bias Current versus Output Current
Figure 9. Bias Current versus Junction Temperature
Figure 10. Output Impedance versus Frequency
Figure 11. Ripple Rejection versus Frequency
Figure 12. Ripple Rejection versus Output Current
RL = 100
RL = 500
Vin = 14 V
Vout = 5.0 V
TJ = 25
C
LM2931 Series
7
MOTOROLA ANALOG IC DEVICE DATA
, REFERENCE VOL
T
AGE (V)
ref
VO, OUTPUT VOLTAGE (V)
1.160
1.180
1.200
1.220
1.240
0
3.0
6.0
9.0
12
15
18
21
24
V
18.5
14
t, TIME (10
s/DIV)
Vout = 5.0 V
RL = 500
CO = 100
F
CO(ESR) = 0.3
TA = 25
C
100
0
t, TIME (10
s/DIV)
VO, OUTPUT VOLTAGE (V)
V
th(on/of
f)
, OUTPUT
INHIBIT
-THRESHOLDS
(V)
2.0
2.1
2.2
0
3.0
6.0
9.0
12
15
18
21
24
Output "On"
Output "Off"
2.4
2.5
2.6
2.3
LM2931C Adjustable
IO = 10 mA
Vin = Vout + 1.0 V
TA = 25
C
Vin = 14 V
Vout = 5.0 V
Cin = 1000
F
CO = 100
F
CO(ESR) = 0.3
TA = 25
C
LM2931C Adjustable
IO = 10 mA
Vin = Vout + 1.0 V
TA = 25
C
OUTPUT
CURRENT
,
I (mA) out
OUTPUT
VOL
T
AGE
DEVIA
TION,
O
, (2.0 mV/DIV)
V
INPUT
VOL
T
AGE,
V , (V)
in
OUTPUT
VOL
T
AGE
DEVIA
TION,
O
, (2.0 mV/DIV)
V
Figure 13. Line Regulation
Figure 14. Load Regulation
Figure 15. Reference Voltage versus Output Voltage
Figure 16. Output InhibitThresholds
versus Output Voltage
APPLICATIONS INFORMATION
The LM2931 series regulators are designed with many
protection features making them essentially blowout proof.
These features include internal current limiting, thermal
shutdown, overvoltage and reverse polarity input protection,
and the capability to withstand temporary powerup with
mirrorimage insertion. Typical application circuits for the
fixed and adjustable output device are shown in Figures 17
and 18.
The input bypass capacitor Cin is recommended if the
regulator is located an appreciable distance (
4
) from the
supply input filter. This will reduce the circuit's sensitivity to
the input line impedance at high frequencies.
This regulator series is not internally compensated and
thus requires an external output capacitor for stability. The
capacitance value required is dependent upon the load
current, output voltage for the adjustable regulator, and the
type of capacitor selected. The least stable condition is
encountered at maximum load current and minimum output
voltage. Figure 22 shows that for operation in the "Stable"
region, under the conditions specified, the magnitude of the
output capacitor impedance |ZO| must not exceed 0.4
. This
limit must be observed over the entire operating temperature
range of the regulator circuit.
With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around 30
C, the capacitance will
decrease and the equivalent series resistance (ESR) will
increase drastically, causing the circuit to oscillate. Quality
electrolytic capacitors with extended temperature ranges of
40
to +85
C and 55
to +105
C are readily available.
Solid tantalum capacitors may be a better choice if small size
is a requirement, however, the maximum
ZO
limit over
temperature must be observed.
Note that in the stable region, the output noise voltage is
linearly proportional to
ZO
. In effect, CO dictates the high
frequency rolloff point of the circuit. Operation in the area
titled "Marginally Stable" will cause the output of the regulator
to exhibit random bursts of oscillation that decay in an
underdamped fashion. Continuous oscillation occurs when
operating in the area titled "Unstable". It is suggested that
oven testing of the entire circuit be performed with maximum
load, minimum input voltage, and minimum ambient
temperature.
LM2931 Series
8
MOTOROLA ANALOG IC DEVICE DATA
0.1
1.0
0.01
V n
, OUTPUT
NOISE VOL
T
AGE
(mV
rms)
Figure 17. Fixed Output Regulator
Figure 18. Adjustable Output Regulator
Figure 19. (5.0 A) Low Differential
Voltage Regulator
Figure 20. Current Boost Regulator with
Short Circuit Projection
Figure 21. Constant Intensity Lamp Flasher
Figure 22. Output Noise Voltage versus
Output Capacitor Impedance
|ZO|, MAGNITUDE OF CAPACITOR IMPEDANCE (m
)
10
100
1.0 k
10 k
Vin
Input
Output
Vout
CO
IB
Gnd
Cin
0.1
LM29315.0
Fixed
Output
Switch Position 1 = Output "On", 2 = Output "Off"
LM2931C
Adjustable
Output
Vin
Cin
0.1
Vout
CO
Output
Input
51 k
1
2
Output
Inhibit
Adjust
Gnd
IAdj
R1
R2
IB
The LM2931 series can be current boosted with a PNP transistor. The
D45VH7, on a heatsink, will provide an output current of 5.0 A with an input
to output voltage differential of approximately 1.0 V. Resistor R in
conjunction with the VBE of the PNP determines when the pass transistor
begins conducting. This circuit is not short circuit proof.
Input
6.0 V
D45VH7
5.0 V @ 5.0 A
Output
100
+
100
+
68
LM29315.0
The circuit of Figure 19 can be modified to provide supply protection against
short circuits by adding the current sense resistor RSC and an additional PNP
transistor. The current sensing PNP must be capable of handling the short
circuit current of the LM2931. Safe operating area of both transistors must be
considered under worst case conditions.
Input
R
RSC
Output
LM29315.0
100
100
+
+
LM2931C
Input
6.4 V to 30 V
2.0 k
8.2 k
100
+
CM
#345
100
+
33 k
6.2 V
fosc = 2.2 Hz
0
10
100
Vin = 5.6 V
Vout = 5.0 V
IO = 100 mA
Vnrms 10 Hz to 10 MHz
|ZO| @ 40 kHz
TA = 25
C
22.5 k
w
R
1
R
2
R
1
)
R
2
Vout
+
V
ref
1
)
R
2
R
1
)
I
Adj
R
2
R
Unstable
Marginally
Stable
Stable
LM2931 Series
9
MOTOROLA ANALOG IC DEVICE DATA
40
50
60
70
80
90
100
0
0.4
0.8
1.2
1.6
2.0
2.4
0
10
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
PD(max) for TA = 50
C
Minimum
Size Pad
P
D
L
L
, MAXIMUM POWER DISSIP
A
TION (W)
Free Air
Mounted
Vertically
30
40
50
60
70
80
1.0
1.5
2.0
2.5
3.0
3.5
0
10
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
PD(max) for TA = 50
C
Minimum
Size Pad
2.0 oz. Copper
L
L
Free Air
Mounted
Vertically
P
D
, MAXIMUM POWER DISSIP
A
TION (W)
30
50
70
90
110
130
150
0.4
0.8
1.2
1.6
2.0
2.4
2.8
0
20
30
50
40
10
L, LENGTH OF COPPER (mm)
170
3.2
R
JA
P
D
R
,
THERMAL
RESIST
ANCE
JA
JUNCTIONT
OAIR ( C/W)
, MAXIMUM POWER DISSIP
A
TION (W)
2.0 oz.
Copper
Graph represents symmetrical layout
3.0 mm
L
L
R
JA
R
JA
2.0 oz. Copper
R
,
THERMAL
RESIST
ANCE
JA
JUNCTIONT
OAIR ( C/W)
R
,
THERMAL
RESIST
ANCE
JA
JUNCTIONT
OAIR ( C/W)
Figure 23. SOP8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 24. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 25. 3Pin and 5Pin D2PAK
Thermal Resistance and Maximum Power
Dissipation versus P.C.B. Copper Length
PD(max) for TA = 50
C
LM2931 Series
10
MOTOROLA ANALOG IC DEVICE DATA
DEFINITIONS
Dropout Voltage The input/output voltage differential at
which the regulator output no longer maintains regulation
against further reductions in input voltage. Measured when
the output decreases 100 mV from nominal value at 14 V
input, dropout voltage is affected by junction temperature and
load current.
Line Regulation The change in output voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.
Load Regulation The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation The maximum total
device dissipation for which the regulator will operate within
specifications.
Bias Current That part of the input current that is not
delivered to the load.
Output Noise Voltage The rms AC voltage at the
output, with constant load and no input ripple, measured over
a specified frequency range.
LongTerm Stabliity Output voltage stability under
accelerated life test conditions with the maximum rated
voltage listed in the devices electrical characteristics and
maximum power dissipation.
LM2931 Series
11
MOTOROLA ANALOG IC DEVICE DATA
Z SUFFIX
PLASTIC PACKAGE
CASE 2904
(TO92 Type)
ISSUE AD
OUTLINE DIMENSIONS
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. DIMENSION F APPLIES BETWEEN P AND L.
DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.
MIN
MIN
MAX
MAX
INCHES
MILLIMETERS
DIM
A
B
C
D
F
G
H
J
K
L
N
P
R
V
4.45
4.32
3.18
0.41
0.41
1.15
2.42
0.39
12.70
6.35
2.04
2.93
3.43
5.20
5.33
4.19
0.55
0.48
1.39
2.66
0.50
2.66
2.54
0.175
0.170
0.125
0.016
0.016
0.045
0.095
0.015
0.500
0.250
0.080
0.115
0.135
0.205
0.210
0.165
0.022
0.019
0.055
0.105
0.020
0.105
0.100
SEATING
PLANE
R
A
P
F
L
K
X
X
H
G
V
N
N
D
J
SECTION XX
B
C
1
T SUFFIX
PLASTIC PACKAGE
CASE 221A06
(TO220 Type)
ISSUE Y
MIN
MIN
MAX
MAX
INCHES
MILLIMETERS
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
14.48
9.66
4.07
0.64
3.61
2.42
2.80
0.46
12.70
1.15
4.83
2.54
2.04
1.15
5.97
0.00
1.15
15.75
10.28
4.82
0.88
3.73
2.66
3.93
0.64
14.27
1.52
5.33
3.04
2.79
1.39
6.47
1.27
2.04
0.570
0.380
0.160
0.025
0.142
0.095
0.110
0.018
0.500
0.045
0.190
0.100
0.080
0.045
0.235
0.000
0.045
0.620
0.405
0.190
0.035
0.147
0.105
0.155
0.025
0.562
0.060
0.210
0.120
0.110
0.055
0.255
0.050
0.080
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIM Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.
T
SEATING
PLANE
C
S
T
U
J
R
F
B
Q
H
Z
L
V
G
N
D
K
A
4
1 2 3
LM2931 Series
12
MOTOROLA ANALOG IC DEVICE DATA
TH SUFFIX
PLASTIC PACKAGE
CASE 314A03
(TO220 Type)
ISSUE D
TV SUFFIX
PLASTIC PACKAGE
CASE 314B05
(TO220 Type)
ISSUE J
G
W
E
J
5 PL
D
5 PL
F
K
U
B
A
L
C
H
1 2 3 4 5
SEATING
PLANE
T
N
S
V
T
0.24 (0.610)
M
P
Q
T
P
0.10 (0.254)
M
M
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION D DOES NOT INCLUDE INTERCONNECT BAR
(DAMBAR) PROTRUSION. DIMENSION D INCLUDING
PROTRUSION SHALL NOT EXCEED 0.043 (1.092) MAXIMUM.
1.702 BSC
0.067 BSC
MIN
MIN
MAX
MAX
INCHES
MILLIMETERS
DIM
A
B
C
D
E
F
G
H
J
K
L
N
Q
S
U
V
W
14.529
9.906
4.318
0.635
1.219
21.590
0.381
22.860
8.128
3.556
11.888
2.286
15.570
10.541
4.572
0.965
1.397
23.749
0.635
27.940
9.271
3.886
15.748
12.827
18.669
2.794
0.572
0.390
0.170
0.025
0.048
0.850
0.015
0.900
0.320
0.140
0.468
0.090
0.613
0.415
0.180
0.038
0.055
0.935
0.025
1.100
0.365
0.153
0.620
0.505
0.735
0.110
4.216 BSC
0.166 BSC
8.128 BSC
0.320 BSC
OUTLINE DIMENSIONS
G
E
J
5 PL
D
5 PL
F
K
U
B
A
L
C
1 2 3 4 5
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION D DOES NOT INCLUDE
INTERCONNECT BAR (DAMBAR) PROTRUSION.
DIMENSION D INCLUDING PROTRUSION SHALL
NOT EXCEED 0.043 (1.092) MAXIMUM.
SEATING
PLANE
T
S
T
P
0.014 (0.356)
M
M
OPTIONAL
CHAMFER
Q
DIM
A
MIN
MAX
MIN
MAX
MILLIMETERS
0.572
0.613
14.529
15.570
INCHES
B
0.390
0.415
9.906
10.541
C
0.170
0.180
4.318
4.572
D
0.025
0.038
0.635
0.965
E
0.048
0.055
1.219
1.397
F
0.570
0.585
14.478
14.859
G
0.067 BSC
1.702 BSC
J
0.015
0.025
0.381
0.635
K
0.730
0.745
18.542
18.923
L
0.320
0.365
8.128
9.271
Q
0.140
0.153
3.556
3.886
S
0.210
0.260
5.334
6.604
U
0.468
0.505
11.888
12.827
P
LM2931 Series
13
MOTOROLA ANALOG IC DEVICE DATA
DT1 SUFFIX
PLASTIC PACKAGE
CASE 36907
(DPAK)
ISSUE L
T SUFFIX
PLASTIC PACKAGE
CASE 314D03
(TO220 Type)
ISSUE D
Q
T
SEATING
PLANE
C
U
G
E
H
J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION D DOES NOT INCLUDE
INTERCONNECT BAR (DAMBAR) PROTRUSION.
DIMENSION D INCLUDING PROTRUSION SHALL
NOT EXCEED 10.92 (0.043) MAXIMUM.
MIN
MIN
MAX
MAX
INCHES
MILLIMETERS
DIM
A
B
C
D
E
G
H
J
K
L
Q
U
S
14.529
9.906
4.318
0.635
1.219
2.210
0.381
25.908
8.128
3.556
2.667
13.792
15.570
10.541
4.572
0.965
1.397
2.845
0.635
27.051
9.271
3.886
2.972
14.783
0.572
0.390
0.170
0.025
0.048
0.087
0.015
1.020
0.320
0.140
0.105
0.543
0.613
0.415
0.180
0.038
0.055
0.112
0.025
1.065
0.365
0.153
0.117
0.582
A
B
L
S
K
D
5 PL
1.702 BSC
0.067 BSC
1 2 3 4 5
0.356 (0.014)
T
Q
M
M
OUTLINE DIMENSIONS
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
1
2
3
4
V
S
A
K
T
SEATING
PLANE
R
B
F
G
D
3 PL
M
0.13 (0.005)
T
C
E
J
H
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.235
0.250
5.97
6.35
B
0.250
0.265
6.35
6.73
C
0.086
0.094
2.19
2.38
D
0.027
0.035
0.69
0.88
E
0.033
0.040
0.84
1.01
F
0.037
0.047
0.94
1.19
G
0.090 BSC
2.29 BSC
H
0.034
0.040
0.87
1.01
J
0.018
0.023
0.46
0.58
K
0.350
0.380
8.89
9.65
R
0.175
0.215
4.45
5.46
S
0.050
0.090
1.27
2.28
V
0.030
0.050
0.77
1.27
LM2931 Series
14
MOTOROLA ANALOG IC DEVICE DATA
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC PACKAGE
CASE 369A13
(DPAK)
ISSUE Y
D SUFFIX
PLASTIC PACKAGE
CASE 75105
(SOP8)
ISSUE S
D
A
K
B
R
V
S
F
L
G
2 PL
M
0.13 (0.005)
T
E
C
U
J
H
T
SEATING
PLANE
Z
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.235
0.250
5.97
6.35
B
0.250
0.265
6.35
6.73
C
0.086
0.094
2.19
2.38
D
0.027
0.035
0.69
0.88
E
0.033
0.040
0.84
1.01
F
0.037
0.047
0.94
1.19
G
0.180 BSC
4.58 BSC
H
0.034
0.040
0.87
1.01
J
0.018
0.023
0.46
0.58
K
0.102
0.114
2.60
2.89
L
0.090 BSC
2.29 BSC
R
0.175
0.215
4.45
5.46
S
0.020
0.050
0.51
1.27
U
0.020
0.51
V
0.030
0.050
0.77
1.27
Z
0.138
3.51
1
2
3
4
SEATING
PLANE
1
4
5
8
A
0.25
M
C B
S
S
0.25
M
B
M
h
q
C
X 45
_
L
DIM
MIN
MAX
MILLIMETERS
A
1.35
1.75
A1
0.10
0.25
B
0.35
0.49
C
0.18
0.25
D
4.80
5.00
E
1.27 BSC
e
3.80
4.00
H
5.80
6.20
h
0
7
L
0.40
1.25
q
0.25
0.50
_
_
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETERS.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
D
E
H
A
B
e
B
A1
C
A
0.10
LM2931 Series
15
MOTOROLA ANALOG IC DEVICE DATA
D2T SUFFIX
PLASTIC PACKAGE
CASE 93603
(D2PAK)
ISSUE B
5 REF
5 REF
A
1
2
3
K
F
B
J
S
H
0.010 (0.254)
T
M
D
G
C
E
T
M
L
P
N
R
V
U
TERMINAL 4
NOTES:
1 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2 CONTROLLING DIMENSION: INCH.
3 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
4 DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
5 DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
DIM
A
MIN
MAX
MIN
MAX
MILLIMETERS
0.386
0.403
9.804
10.236
INCHES
B
0.356
0.368
9.042
9.347
C
0.170
0.180
4.318
4.572
D
0.026
0.036
0.660
0.914
E
0.045
0.055
1.143
1.397
F
0.051 REF
1.295 REF
G
0.100 BSC
2.540 BSC
H
0.539
0.579
13.691
14.707
J
0.125 MAX
3.175 MAX
K
0.050 REF
1.270 REF
L
0.000
0.010
0.000
0.254
M
0.088
0.102
2.235
2.591
N
0.018
0.026
0.457
0.660
P
0.058
0.078
1.473
1.981
R
S
0.116 REF
2.946 REF
U
0.200 MIN
5.080 MIN
V
0.250 MIN
6.350 MIN
_
_
OUTLINE DIMENSIONS
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A02
(D2PAK)
ISSUE A
5 REF
A
1
2
3
K
B
S
H
0.010 (0.254)
T
M
D
G
C
E
T
M
L
P
N
R
V
U
TERMINAL 6
NOTES:
6 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
7 CONTROLLING DIMENSION: INCH.
8 TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
9 DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 6.
10 DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
DIM
A
MIN
MAX
MIN
MAX
MILLIMETERS
0.386
0.403
9.804
10.236
INCHES
B
0.356
0.368
9.042
9.347
C
0.170
0.180
4.318
4.572
D
0.026
0.036
0.660
0.914
E
0.045
0.055
1.143
1.397
G
0.067 BSC
1.702 BSC
H
0.539
0.579
13.691
14.707
K
0.050 REF
1.270 REF
L
0.000
0.010
0.000
0.254
M
0.088
0.102
2.235
2.591
N
0.018
0.026
0.457
0.660
P
0.058
0.078
1.473
1.981
R
5 REF
S
0.116 REF
2.946 REF
U
0.200 MIN
5.080 MIN
V
0.250 MIN
6.350 MIN
_
_
4
5
LM2931 Series
16
MOTOROLA ANALOG IC DEVICE DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
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How to reach us:
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