HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-87x Series
Rev.7.2_00
6. Shutdown circuit (C/E/G type)
When VPF pin goes low (0.4 V or less) in the C/G type or at the time of voltage detection in the E type
current for the voltage regulator is shut down, the current consumption (excluding the current which flows
through the pull-up resistor) lowers to 3.5 μA or less.
During shutdown, the M1 transistor in the voltage regulator shown in the Figure 17 is off and VOUT pin is
pulled down by R1 and R2, whose value (R1+R2) is 5 MΩ to 10 MΩ. Input current of VPF pin is 0.1 μA or
less.
Caution 1. The output voltage may not become 0 V when the load which makes IOUT under 1 μA is
connected during shutdown.
2. DO NOT keep VPF pin floating state or medium potential (between low and high
levels). Otherwise through-type current flows.
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Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
