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Cherry Semiconductor Corporation
Cherry Semiconductor Corporation

CS8271 Datasheet Preview

CS8271 Datasheet

Adjustable Micropower Low Dropout Linear Regulator with ENABLE

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CS8271 pdf
CS8271
Adjustable Micropower Low Dropout
Linear Regulator with ENABLE
Description
Features
The CS8271 is an adjustable microp-
ower voltage regulator with very
low quiescent current (60µA typical
at 100µA load). The output supplies
100mA of load current with a maxi-
mum dropout voltage of only
600mV. Control logic includes
ENABLE. The combination of low
quiescent current, outstanding reg-
ulator performance and control
logic makes the CS8271 ideal for
any battery operated equipment.
The logic level compatible ENABLE
pin allows the user to put the regu-
lator into a shutdown mode where it
draws only 50µA of quiescent cur-
rent.
The regulator is protected against
reverse battery, short circuit, over
voltage, and over temperature con-
ditions. The device can withstand
60V load dump transients making it
suitable for use in automotive envi-
ronments.
The CS8271 is pin compatible with
the National Semiconductor
LM2931.
s Low Quiescent Current
s Adjustable Output:
5V to 12V
s ENABLE for Sleep Mode
Control
s 100mA Output Current
Capability
s Fault Protection
+60V Load Dump
-15V Reverse Voltage
Short Circuit
Thermal Shutdown
s Low Reverse Current
(Output to Input)
Block Diagram
VIN
ENABLE
Input
Rev. 3/26/97
Current Source
(Circuit Bias)
Over
Voltage
Shutdown
Current Limit
Sense
Thermal
Shutdown
Bandgap
Reference
+ - Error
Amplifier
VOUT
Adj
Gnd
Package Options
8L SOIC & PDIP
VOUT 1
Gnd
NC
Adj
VIN
NC
NC
ENABLE
Other Packages: Consult factory for
16L SO Batwing, 5L TO-220 and D2PAK.
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
1 A ¨ Company



Cherry Semiconductor Corporation
Cherry Semiconductor Corporation

CS8271 Datasheet Preview

CS8271 Datasheet

Adjustable Micropower Low Dropout Linear Regulator with ENABLE

No Preview Available !

CS8271 pdf
Absolute Maximum Ratings
Power Dissipation.............................................................................................................................................Internally Limited
Transient Input Voltage ..................................................................................................................................................-50V, 60V
Reverse Battery..........................................................................................................................................................................-15V
Output Current .................................................................................................................................................Internally Limited
ESD Susceptibility (Human Body Model)..............................................................................................................................2kV
Junction Temperature .............................................................................................................................................-40¡C to 150¡C
Storage Temperature...............................................................................................................................................-55¡C to 150¡C
Lead Temperature Soldering
Wave Solder (through hole styles only) .....................................................................................10 sec. max, 260¡C peak
Reflow (SMD styles only) ......................................................................................60 sec. max above 183¡C, 230¡C peak
Adj and Enable Output ..................................................................................................................................................-0.3V, 10V
VOUT ...........................................................................................................................................................................-0.3V, 20V
Electrical Characteristics: VOUT + 1V ² VIN ² 30V, 5V ² VOUT ² 12V, IOUT = 10mA, -40¡ ² TA ² 125¡, -40¡ ² TJ ² 150¡,
VENABLE = 0V; unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
s Output Voltage
Dropout Voltage
Load Regulation
Line Regulation
Quiescent Current, (IQ)
Active Mode
Quiescent Current, (IQ)
Sleep Mode
Ripple Rejection
IOUT = 100µA, VDROP = (VIN Ð VOUT)
IOUT = 100mA, VDROP = (VIN Ð VOUT)
Measure VOUT when
IOUT = 100µA, 100mA.
LDREG = ABS (ÆVOUT)
IOUT = 1mA. Measure VOUT
when VIN = VOUT + 1V, 30V.
LNREG = ABS (ÆVOUT)
VIN = 6V, IOUT = 100µA,
VOUT setup for 5V. IQ = IVIN - IOUT
VIN = 13V, IOUT = 100µA,
VOUT setup for 12V. IQ = IVIN - 100µA
VIN = 30V, IOUT = 100µA,
VOUT setup for 5V, IQ = IVIN - 100µA
VIN = 30V, IOUT = 100µA,
VOUT setup for 12V, IQ = IVIN - 100µA
IOUT = 50mA, IQ = IVIN - 50mA
IOUT = 100mA, IQ = IVIN - 100mA
VIN = 6V, ENABLE = 2.5V,
IQSLEEP = IVIN
VIN = 30V, ENABLE = 2.5V,
IQSLEEP = IVIN
f=120Hz, (Note 1)
60
100 150 mV
400 600 mV
0.1 1.0 %VOUT
0.1 0.5 %VOUT
55 120 µA
130 200 µA
150 450 µA
200 500 µA
4 7 mA
12 21 mA
20 50 µA
75 350 µA
75 dB
Current Limit
Short Circuit Output Current
Thermal Limit
VOUT = VOUT - 500mV, ILIM = IVOUT
VOUT=0V, ISHRT = IVOUT
(Note 1)
105
15
150
200 300
100 215
180 210
mA
mA
¡C
Overvoltage Shutdown
Reverse Current
Adjust VIN from 28V to 40V
until VOUT ² 1V
VIN=0V, IREV = IVOUT, VOUT = 13.2V
30
34 38 V
100 200 µA
2


Part Number CS8271
Description Adjustable Micropower Low Dropout Linear Regulator with ENABLE
Maker Cherry Semiconductor Corporation
Total Page 6 Pages
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