CS403
CS403
5V, 750mA Linear Regulator
with RESET
Description
The CS403 is a linear regulator spe-
cially designed as a post regulator.
The CS403 provides low noise, low
drift, and high accuracy to
improve the performance of a
switching power supply. It is ideal
for applications requiring a highly
efficient and accurate linear regu-
lator. The active RESET makes the
device particularly well suited to
supply microprocessor based sys-
tems. The PNP-NPN output stage
assures a low dropout voltage
without requiring excessive supply
current. Its features include low
dropout (1V typically) and low
supply drain (4mA typical with
I
OUT
= 500mA).
The CS403 design optimizes sup-
ply rejection by switching the
internal reference from the supply
input to the regulator output as
soon as the nominal output voltage
is reached.
Features
s
5V ±5% Output Voltage
s
Low Drift
s
High Efficiency
s
Short Circuit Protection
s
Active Delayed Reset
s
Noise Immunity on Reset
s
750mA Output Current
Absolute Maximum Ratings
Forward Input Voltage ..................................................................................18V
Operating Junction Temperature, T
J
..............................................-40 to 150ûC
Storage Temperature........................................................................-55 to 150ûC
Lead Temperature Soldering
Wave Solder (through hole styles only)..........10 sec. max, 260¡C peak
Block Diagram
Package Options
5 Lead TO-220
Tab (Gnd)
V
OUT
Output
Current
Limit
V
IN
Start
1. V
IN
+
REF
TO V
OUT
-
+
-
Error Amp
I
CHARGE
SCR
Latch
Delay
2. RESET
3. Gnd
4. Delay
5. V
OUT
Low Voltage
INHIBIT
Comparator
RESET
-
Delay
Comparator
+
V
CMP
Gnd
1
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. 2/18/98
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
