UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-004,D
250 mA LOW-DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC M2950/2951 is a monolithic integrated voltage
regulator with low dropout voltage, and low quiescent current.
It includes many features that suitable for different
applications. Available in 3-pin TO-92, DIP-8 and SOP-8
packages.
FEATURES
*High accuracy 2.5, 3.0, 3.3, 3.6 or 5V fixed output for
TO-92, SOP-8 package.
*Extremely low quiescent current and dropout voltage.
*Extremely tight load and line regulation.
*Current and thermal limiting.
*Very low temperature coefficient.
*Logic controlled shutdown and error flag available for DIP
and SOP package.
*Output voltage programmable for DIP and SOP package.
APPLICATIONS
*Battery powered equipment.
*High efficient linear regulator down to 1.24V.
*Cellular phones.
TO-92
SOP-8
DIP-8
1
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R102-004,D
PIN CONFIGURATIONS
2
1 3
OUTPUT
GND
INPUT
UTC M2950
TO-92 Plastic Package
Bottom View
1
2
3
4
8
7
6
5
INPUT
FEEDBACK
5V TAP
SHUTDOWN
SENSE
OUTPUT
UTC
M2951
GND
ERROR
SOP-8 OR DIP-8 PACKAGE
FOR UTC M2951
1
2
3
4
8
7
6
5
INPUT
NC
NC
SHUTDOWN
NC
OUTPUT
UTC
M2950
GND
ERROR
SOP-8 OR DIP-8 PACKAGE
FOR UTC M2950
Fig.1
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R102-004,D
BLOCK DIAGRAM
5
4
6
2
1
8
7
3
60mV
330K
TO CMOS
OR TTL
5V 250mA
MAX.
FEEDBACK
INPUT
OUTPUT
SENSE
5V TAP
GND
ERROR
DETECTION
COMPARATOR
ERROR
AMPLIFIER
FROM CMOS
OR TTL
1.23
REF
SHUT
DOWN
UNRAGULATED
DC
ERROR
182K
60K
1.5
F
FOR UTC M2951
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL VALUE
UNIT
Supply Voltage
Vcc
-0.3~+18
V
Feedback Voltage
Vfeedback
-1.5~+18
V
Shutdown Voltage
Vshutdown
-0.3~+18
V
Comparator Output Voltage
Vco
-0.3~+18
V
Storage Temperature
Tstr
-65~+150
C
Operating Junction Temperature
Tj
-40~+125
C
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R102-004,D
ELECTRICAL CHARACTERISTICS
(Tested at Tj=25
C, V
IN
=6V, I
L
=100
A and C
L
=1
F, unless otherwise specified)
PARAMETER
PART NUMBER
TEST CONDITION
MIN. TYP. MAX.
UNIT
Output Voltage
UTC M2950-2.5
UTC M2950-3.0
UTC M2950-3.3
UTC M2950-3.6
UTC M2950-5.0
UTC M2951
T
J
=25
C
(note 1)
2.45
2.94
3.23
3.53
4.90
2.5
3.0
3.3
3.6
5.0
2.55
3.06
3.36
3.67
5.10
V
UTC
M2950-2.5
UTC M2950-3.0
UTC M2950-3.3
UTC M2950-3.6
UTC M2950-5.0
UTC M2951
-25
C<=T
J<=
<=+85
C
(note 1)
2.45
2.94
3.23
3.53
4.90
2.5
3.0
3.3
3.6
5.0
2.55
3.06
3.36
3.67
5.10
V
Output Voltage
UTC M2950-2.5
UTC M2950-3.0
UTC M2950-3.3
UTC M2950-3.6
UTC M2950-5.0
UTC M2951
100
A<=I
L
<=250 mA
Tj<=Tj(max)
(note 1)
2.45
2.94
3.23
3.53
4.90
2.5
3.0
3.3
3.6
5.0
2.55
3.06
3.36
3.67
5.10
V
Output Voltage
Temperature Coefficient
20
100
ppm/
C
Line Regulation
6V<=V
IN
<=18V 0.03
0.1
0.2
%
Load Regulation
100
A<=I
L
<=250 mA
0.04
0.1
0.2
%
Dropout Voltage
I
L
=100
A
I
L
=250mA (note 2)
50
380
80
450
150
600
mV
Ground Current
I
L
=100
A
I
L
=250mA
75
8
120
12
140
22
A
mA
Dropout Ground Current
V
IN
=4.5V,I
L
=100
A 110
170
200
A
Current Limit
Vout=0
160
200
300
mA
Output Noise 10Hz to
100KHz
C
L
=1
F
C
L
=200
F
C
L
=3.3
F
(Bypass=0.01
F
pins 7 to (
UTC M2951))
260 280 430
160
100
V
For M2951 8-Pin version only
Reference Voltage
1.22
1.235
1.25
V
Reference Voltage
(Note 4)
1.19
1.27
V
Feedback pin Bias
Current
20
40
nA
Reference Voltage
Temperature Coefficient
50
ppm/
C
Feedback Bias Current
temperature Coefficient
0.1
nA/
C
Error Comparator
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R102-004,D
PARAMETER
PART NUMBER
TEST CONDITION
MIN. TYP. MAX.
UNIT
Output Leakage Current
V
OH
=18V
1
A
Output Low Voltage
V
IN
=4.5V
I
OL
=400
A
250
mV
Upper Threshold
Voltage
(Note
3) 3.2
%V
O
Lower Threshold
Voltage
(Note
3)
7.6
%V
O
Hysteresis
(Note
3)
15
mV
Shutdown Input
Input Logic Voltage
Low(Regulator ON)
High(Regulator OFF)
2.0
1.3
0.70
V
Shutdown Pin Input
Current
V
shutdown
=2.4V
30 50
A
V
shutdown
=18V
450
600
A
Regulator Output
Current Shutdown
Vshutdown>=2V,V
IN
<=18V,
V
out
=0,
Feedback pin tied to 5V Tap.
3 10
A
Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
(V
out
=5V) and Vshutdown<=0.8V.
Note 2:Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV
below its nominal value measured at 1V differential.
Note 3:Comparator thresholds are expressed in terms of percentage value of voltage output.
Note 4:Vref
Vout(Vin-1V), 2.3VVin30V, 100AI
L
250mA, T
J
T
JMAX
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R102-004,D
APPLICATION CIRCUIT
(10 Ampere Low Dropout Regulator)
+ V
IN
F B
V o u t
G N D
S D
E R R O R
U T C M 2 9 5 1
8
5
7
1
4
3
C U R R E N T
L I M I T
S E C T I O N
+ V
IN
= V
o u
t + 0 . 5 V
0 . 0 5
4 7 0
6 8 0
4 . 7 M
2 0 k
2 2 0
0 . 0 3 3
F
4 7
R 1
R 2
4 . 7
F
1 0 0
F
1 %
1 0 k
2 N 3 9 0 6
+
V
O U T
2 5 0 m A
V o u t = 1 . 2 3 V * ( 1 + R 1 / R 2 )
F o r 5 V o u t p u t
u s e i n t e r n a l r e s i s t o r s . W i r e p i n 6 t o 7
a n d w i r e p i n 2 t o + V
o u t
U T C
D 6 5 H 0
Fig.2
UTC M2950-2.5
UTC M2950-3.0
UTC M2950-3.3
UTC M2950-3.6
UTC M2950-5.0
Vin
Vout
Fig.3
UTC M2950/2951
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R102-004,D
TYPICAL PERFORMANCE CHARACTERISTICS
1
2
3
4
5
6
0
0
1
2
3
4
5
6
Fig.4 Dropout Characteristics
INPUT VOLTAGE(V)
O
U
TPUT VO
L
T
AG
E(
V
)
R
L
=50k
R
L
=20
0 1
2
3 4
5 6
7 8
9 10 11 12
150
160
170
180
190
200
210
220
230
240
250
270
260
280
290
300
Fig.5 Input Current
I
NPUT
CU
RR
E
N
T
(
m
A
)
INPUT VOLTAGE(V)
R
L
=20
50
60
70
80
90
100
110
120
-75 -50
-25
0
25
50
75
100 125 150
Fig. 7 Ground Pin Current
Q
U
I
E
S
C
E
N
T
C
U
R
RENT
(
)
TEMPERATURE(C)
V
IN
=6V
I
L
=100
A
-75 -50
-25
0
25
50
75
100 125 150
6
7
8
9
10
TEMPERATURE(C)
Fig. 8 Ground Pin Current
Q
U
I
E
SCENT
CU
RR
E
N
T
(
m
A
)
V
IN
=6V
I
L
=250mA
-75 -50
-25
0
25
50
75
100 125 150
230
240
250
260
270
280
290
300
TEMPERATURE(C)
S
H
O
R
T
CI
RC
UI
T
CUR
RENT
(m
A)
Fig. 10 Short Circuit Current
-75 -50
-25
0
25
50
75
100 125 150
0
50
100
300
400
500
600
TEMPERATURE(C)
D
R
OP
OU
T
V
O
L
T
A
G
E
(
m
V
)
Fig. 6 Dropout Voltage
I
L
=250mA
I
L
=100
A
-75 -50
-25
0
25
50 75
100 125 150
TEMPERATURE(C)
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Fig. 9 Shutdown Threshold Voltage
S
h
u
t
do
w
n
Thre
s
h
ol
d V
o
l
t
ag
e(V
)
100
150
200
250
0
100
200
300
400
500
Fig. 11 Dropout Voltage
OUTPUT CURRENT(mA)
Dr
opo
ut
Volt
ag
e(
m
V
)
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