CS8321
CS8321
Micropower 5V, 150mA Low Dropout
Linear Regulator
Description
The CS8321 is a precision 5V
micropower voltage regulator with
very low quiescent current (140µA
typ at 1mA load). The 5V output is
accurate within ±2% and supplies
150mA of load current with a typi-
cal dropout voltage of only 300mV.
This combination of low quiescent
current and outstanding regulator
performance makes the CS8321
ideal for any battery operated
equipment.
The regulator is protected against
reverse battery and short circuit
conditions. The device can with-
stand 45V load dump transients
making it suitable for use in auto-
motive environments.
Features
s
5V ±2% Output
s
Low 140µA (typ)
Quiescent Current
s
150mA Output Current
Capability
s
Fault Protection
-15V Reverse Voltage
Output Current Limit
s
Low Reverse Current
(Output to Input)
Absolute Maximum Ratings
Transient Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-15V, 45V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Internally Limited
ESD Susceptibility (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40¡C to 150¡C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65C 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
Block Diagram
Package Options
3L TO-220
V
IN
Q
P
Current Source
(Circuit Bias)
V
OUT
1. V
IN
2. Gnd
3. V
OUT
R
Q
N
Current Limit
Sense
1
V
OUT
Sense*
3L D
2
PAK
1. V
IN
2. Gnd
3. V
OUT
+
-
Error
Amplifier
R
1
Bandgap
Reference
1
R
2
Gnd
*Note: Lead shorted to V
OUT
in 3 pin applications
Other Packages: 16L SO, 16L PDIP,
8L SO, 8L PDIP, (consult factory)
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
Rev. 11/25/96
1
A
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Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
