S-87X_1 Datasheet, PDF (32/53 Pages) Seiko Instruments Inc – HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION

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 I_OUT 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.