CS8140 Cherry Semiconductor Corporation, CS8140 Datasheet - Page 10

• Manufacturer Part Number: CS8140
• Description: 5V/ 500mA Linear Regulator with ENABLE/ / and Watchdog RESET
• Manufacturer: Cherry Semiconductor Corporation

Figure 7. Application Diagram
Figure 8. Applications diagram for CS8140. The CS8140 provides a 5V tightly regulated supply and control function to the microprocessor. In this
application, the microprocessor controls its own power down sequence (see text).
*C1 is required if regulator is located far from the power source filter.
**C2 required for stability
***R ² 80k½
Ignition
Battery
C
0.1mF
(optional)
0.1mF
110K
1
*
R
1
9V
Switch
C 1
0.1mF
V
ENABLE
DELAY
IN
Application Diagrams
10mF
CS8140
Gnd
ENABLE
V
IN
C
2.7k
Delay
RESET
CS8140/1
10
V
C 2
0.1mF
WDI
OUT
WATCHDOG PORT
V
RESET
cc
RESET
MICROPROCESSOR
V
Gnd
WDI
R***
C
10mF*
OUT
2
**
5V
2.7kW
MICROPROCESSOR
WATCHDOG
RESET
PORT
V
cc