INTELLIGENCE AND POWER
FEATURE SHEET
AUT
OMO
R
A
DE
1.4A Switching Regulator,
and 5V, 100mA Linear Regulator
with Watchdog, RESET,
and ENABLE – CS5112
Multiplexer
-
+
Switcher
Error Amplifier
COMP
T E C H N I C A L F E AT U R E S
s
Linear Regulator
• 5V ±2% @ 100mA
• Operates During Load Dump
s
Switching Regulator
• 1.4A Peak Internal Switch
• 120kHz Maximum Switching
Frequency
• Operates Down to 5V
• Operates During Load Dump
s
Smart Functions
• Watchdog
• RESET
• ENABLE
s
Protection
• Overtemperature
• Current Limit
• 40V Peak Transient
Capability
T
VE
T
I
I
V
E
+
C
OSC
Oscillator
Switcher Shutdown
ENABLE
V
REG
1.25V
Bandgap
Reference
C
DELAY
WDI
RESET &
Watchdog Timer
Description
The CS5112 is a dual output power supply IC. It contains a 5V ±2% 100mA linear
regulator, a watchdog timer, Power On Reset and 1.4A current mode PWM switching
regulator.
The switching regulator configuration makes it ideal for automotive airbag applications.
This part meets all automotive requirements, with the linear regulator operating during
load dump transients. An externally programmable active reset circuit operates for an
output voltage (V
LIN
) as low as 1V.
-
Linear
Error Amplifier
Current
Limit
Over
Temperature
www.cherry-semi.com
-
-
G
G
V
FB1
V
FB2
SELECT
COMP
I
BIAS
V
IN
Logic
Base
Drive
+
Gnd
V
SW
1.4A
Current Sense Amplifier
+
V
LIN
RESET
PACKAGE OPTIONS
s
24 Lead SO Wide
(internally fused leads)
V
IN
NC
NC
V
SW
Gnd
Gnd
Gnd
Gnd
V
FB1
V
FB2
SELECT
COMP
1
ENABLE
V
REG
V
LIN
I
BIAS
Gnd
Gnd
Gnd
Gnd
RESET
C
Delay
WDI
C
OSC
A
®
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
