HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-87x Series
Rev.7.2_00
Application Circuits
1. Microcomputer power supply and reset circuit
To construct a microcomputer power supply and a reset circuit using conventional ICs, a voltage regulator
IC, a voltage detector IC, a delay time generation circuit and others are required. The A/B type allows
you to make these circuits without these ICs, and the delay time is variable.
VOUT
VIN
CD
VOUT
VOR
100 kΩ
CPU
RESET
CD
VSS
Figure 36
Caution The above connection diagram and constants do not guarantee correct operation.
Perform sufficient evaluation using the actual application to set the constants.
2. Output current boost circuit
A PNP transistor is used to increase the output current.
1. A/ B type
VIN
VIN
CD
VOUT
VOR
VOUT
VOR
VSS
VSS
Figure 37
41
Seiko Instruments Inc.
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