Semiconductor Components Industries, LLC, 2001
November, 2001 Rev. 13
1
Publication Order Number:
CS9201/D
CS9201
Micropower 5.0 V, 100 mA
Low Dropout Linear
Regulator with NOCAP
TM
The CS9201 is a precision 5.0 V, 100 mA voltage regulator with low
quiescent current (450
A typ. @ 100
A load). The 5.0 V output is
accurate within
2% and supplies 100 mA of load current with a
maximum dropout voltage of only 600 mV.
The regulator is protected against reverse battery, short circuit, over
voltage, and over temperature conditions. The device can withstand
74 V peak transients making it suitable for use in automotive
environments. ON's proprietary NOCAP solution is the first
technology which allows the output to be stable without the use of an
external capacitor. NOCAP is suitable for slow switching or steady
loads.
Features
NOCAP
Low Quiescent Current (450
typ. @ 100
A load)
5.0 V,
2% Output
100 mA Output Current Capability
Fault Protection
74 V Peak Transient Voltage
15 V Reverse Voltage
Short Circuit
Thermal Shutdown
Overvoltage Shutdown
Internally Fused Leads
Current Source
(Circuit Bias)
Voltage
Shutdown
Over
NOCAP
Current Limit
Sense
Thermal
Shutdown
Bandgap
Reference
V
OUT
Sense
(1)
GND
V
IN
+
Error
Amplifier
(1)
Contact factory for optional Sense lead.
Figure 1. Block Diagram
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Device
Package
Shipping
ORDERING INFORMATION
CS9201YDF8
SO8
95 Units/Rail
CS9201YDFR8
2500 Tape & Reel
SO8
SO8
DF SUFFIX
CASE 751
1
8
NC
NC
1
CS920
AL
YW1
8
GND
GND
GND
GND
V
IN
V
OUT
PIN CONNECTIONS AND
MARKING DIAGRAM
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W = Work Week
CS9201
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2
MAXIMUM RATINGS*
Parameter
Value
Unit
Power Dissipation
Internally Limited
Input Voltage (V
IN
):
DC
Peak Transient Voltage (60 V Load Dump @ V
IN
= 14 V)
15 to 36
74
V
V
Output Current
Internally Limited
ESD Susceptibility (Human Body Model)
4.0
kV
Package Thermal Resistance:
JunctiontoCase, R
JC
JunctiontoAmbient, R
JA
25
110
C/W
C/W
Junction Temperature
40 to +150
C
Storage Temperature
55 to +150
C
Lead Temperature Soldering:
Reflow (SMD styles only) Note 1
230 Peak
C
1. 60 second maximum above 183
C.
*The maximum package power dissipation must be observed.
ELECTRICAL CHARACTERISTICS
(6.0 V
V
IN
26 V, I
OUT
= 1.0 mA, 40
C
T
J
125
C; unless otherwise stated.)
Parameter
Test Conditions
Min
Typ
Max
Unit
Output Stage
Output Voltage, V
OUT
9.0 V < V
IN
< 16 V, 100 uA
I
OUT
100 mA
6.0 V < V
IN
< 26 V, 100 uA
I
OUT
100 mA
4.90
4.85
5.00
5.00
5.10
5.15
V
V
Dropout Voltage (V
IN
V
OUT
)
I
OUT
= 100 mA
I
OUT
= 100
A
400
100
600
150
mV
mV
Load Regulation
V
IN
= 14 V, 100
A
I
OUT
100 mA
5
50
mV
Line Regulation
6.0 V < V < 26 V, I
OUT
= 1.0 mA
5
50
mV
Quiescent Current, (I
Q
)
I
OUT
= 100
A, V
IN
= 12 V
I
OUT
50 mA
I
OUT
100 mA
450
4
12
750
6
20
A
mA
mA
Ripple Rejection
7.0 V
VI
N
17 V, I
OUT
= 100 mA, f = 120 Hz
60
75
dB
Current Limit
105
200
mA
Short Circuit Output Current
V
OUT
= 0 V
25
125
mA
Thermal Shutdown (Note 2)
150
180
C
Overvoltage Shutdown
V
OUT
1.0 V
28
32
36
V
2. This parameter is guaranteed by design, but not parametrically tested in production.
PACKAGE LEAD DESCRIPTION
Package Lead Number
SO8
Lead Symbol
Function
1
V
OUT
5.0 V,
2%, 100 mA output.
4, 5
NC
No connection.
2, 3, 6, 7
GND
Ground.
8
V
IN
Input voltage.
CS9201
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3
TYPICAL PERFORMANCE CHARACTERISTICS
20
18
16
14
12
10
8
6
4
2
0
2
100
90
80
70
60
50
40
30
20
10
0
Output Current (mA)
Load Regulation (mV)
Figure 2. Load Regulation vs. Output Current
V
IN
= 14 V
40
C
125
C
25
C
4.97
4.96
40
Temperature (
C)
Output V
oltage (V)
Figure 3. Output Voltage vs. Temperature V
IN
= 14 V
4.98
4.99
5.00
5.01
5.02
5.03
5.04
20
0
20
40
60
80
100
120
140
20 mA
100 mA
100
A
12
6
Input Voltage (V)
Line Regulation (mV)
Figure 4. Line Regulation vs. Input Voltage
I
OUT
= 100
A
10
8
6
4
2
0
2
4
6
8
10
12
8
10
12
14
16
18
20
22
24
26
25
C
40
C
125
C
0.3
0
Output Current (mA)
Quiescent Current (mA)
Figure 5. Quiescent Current vs. Output
Current (Lightly Loaded) V
IN
= 14 V
0.4
0.5
0.6
0.7
0.8
0.9
1
2
3
4
5
6
7
8
9
10
1
40
C
25
C
125
C
0
0
Output Current (mA)
Quiescent Current (mA)
Figure 6. Quiescent Current vs. Output
Current V
IN
= 14 V
2
4
6
8
10
12
10
20
30
40
50
60
70
80
90
100
14
125
C
40
C
25
C
0.30
4
Input Voltage (V)
Quiescent Current (mA)
Figure 7. Quiescent Current vs. Input Voltage
I
OUT
= 100
A
0.35
0.40
0.45
0.50
0.55
0.60
6
8
10
12
14 16
18
20
22
24
0.65
0.70
26
125
C
40
C
25
C
CS9201
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4
CIRCUIT DESCRIPTION
VOLTAGE REFERENCE AND OUTPUT
CIRCUITRY
Output Stage Protection
The output stage is protected against overvoltage, short
circuit and thermal runaway conditions (Figure 8).
If the input voltage rises above 32 V (typ), the output shuts
down. This response protects the internal circuitry and
enables the IC to survive unexpected voltage transients.
Should the junction temperature of the power device
exceed 180
C
(typ) the power transistor is turned off.
Thermal shutdown is an effective means to prevent die
overheating since the power transistor is the principle heat
source in the IC.
Figure 8. Typical Circuit Waveforms for Output
Stage Protection
Load
Dump
Short
Circuit
Thermal
Shutdown
V
IN
V
OUT
I
OUT
> 32 V
GND
V
IN
V
OUT
CS9201
C
1
*
0.1
F
* C1 is required if regulator is distant from power source filter.
Figure 9. Application and Test Diagram
APPLICATION NOTES
STABILITY CONSIDERATIONS / NOCAP
Normally a low dropout or quasilow dropout regulator
(or any type requiring a slow lateral PNP in the control loop)
necessitates a large external compensation capacitor at the
output of the IC. The external capacitor is also used to curtail
overshoot, determine startup delay time and load transient
response.
Traditional LDO regulators typically have low unity gain
bandwidth, display overshoot and poor ripple rejection.
Compensation is also an issue and depends on the external
capacitor value, ESR (Equivalent Series Resistance) and
board layout parasitics that all can create oscillations if not
properly accounted for.
NOCAP is an ON Semiconductor exclusive output stage
which internally compensates the LDO regulator over
temperature, load and line variations without the need for an
expensive external capacitor
NOCAP is ideally suited for slow switching or steady
loads. If the load is characterized by transient current events,
an output storage capacitor may be needed. If this is the case,
the capacitor should be no larger than 100 nF. With loads
that require greater transient suppression, a regulator with a
traditional output stage (such as the CS8221) may be better
suited for proper operation.
CS9201
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5
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 10) is:
PD(max)
+
{VIN(max)
*
VOUT(min)} IOUT(max)
)
VIN(max)IQ
(1)
where:
V
IN(max)
is the maximum input voltage,
V
OUT(min)
is the minimum output voltage,
I
OUT(max)
is the maximum output current for the
application, and
I
Q
is the quiescent current the regulator consumes at
I
OUT(max)
.
Once the value of P
D(max)
is known, the maximum
permissible value of R
JA
can be calculated:
R
Q
JA
+
150
C
*
TA
PD
(2)
Figure 10. Single output regulator with key
performance parameters labeled.
I
IN
I
OUT
I
Q
CS9201
V
OUT
V
IN
The value of R
JA
can then be compared with those in the
package section of the data sheet. Those packages with
R
JA
's less than the calculated value in equation 2 will keep
the die temperature below 150
C
.
In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external
heatsink will be required.
HEAT SINKS
A heat sink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R
JA
:
R
Q
JA
+
R
Q
JC
)
R
Q
CS
)
R
Q
SA
(3)
where:
R
JC
= the junctiontocase thermal resistance,
R
CS
= the casetoheatsink thermal resistance, and
R
SA
= the heatsinktoambient thermal resistance.
R
JC
appears in the package section of the data sheet.
Like R
JA
, it too is a function of package type. R
CS
and
R
SA
are functions of the package type, heatsink and the
interface between them. These values appear in heat sink
data sheets of heat sink manufacturers.
CS9201
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6
PACKAGE DIMENSIONS
SO8
DF SUFFIX
CASE 75107
ISSUE W
SEATING
PLANE
1
4
5
8
N
J
X 45
_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN
EXCESS OF THE D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
A
B
S
D
H
C
0.10 (0.004)
DIM
A
MIN
MAX
MIN
MAX
INCHES
4.80
5.00
0.189
0.197
MILLIMETERS
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.053
0.069
D
0.33
0.51
0.013
0.020
G
1.27 BSC
0.050 BSC
H
0.10
0.25
0.004
0.010
J
0.19
0.25
0.007
0.010
K
0.40
1.27
0.016
0.050
M
0
8
0
8
N
0.25
0.50
0.010
0.020
S
5.80
6.20
0.228
0.244
X
Y
G
M
Y
M
0.25 (0.010)
Z
Y
M
0.25 (0.010)
Z
S
X
S
M
_
_
_
_
CS9201
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7
Notes
CS9201
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8
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without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC 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 special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or
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4321 NishiGotanda, Shinagawaku, Tokyo, Japan 1410031
Phone: 81357402700
Email: r14525@onsemi.com
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
CS9201/D
NOCAP is a trademark of ON Semiconductor, and is patented.
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