S-1701 Datasheet, PDF (36/70 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION

HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Rev.2.4_00
Detector block
1. Detection voltage (−V_DET), Release voltage (+V_DET)
The detection voltage (−V_DET) is the voltage at which the output switches to low. The detection
voltage varies slightly among products of the same specification. The variation of detection voltage
between the specified minimum (−V_DET) Min. and the maximum (−V_DET) Max. is called the detection
voltage range (refer to Figure 29).
e.g. For a product with −V_DET = 3.0 V, the detection voltage is a value in the range of 2.97 V ≤
(−V_DET) ≤ 3.03 V.
This means that some products have 2.97 V for −V_DET and some have 3.03 V.
The release voltage (+V_DET) is the voltage at which the output switches to high. The release voltage
varies slightly among products of the same specification. The variation of release voltages between
the specified minimum (+V_DET) Min. and the maximum (+V_DET) Max. is called the release voltage
range (refer to Figure 30).
e.g. For a product with −V_DET = 3.0 V, the release voltage is a value in the range of 3.059 V ≤
(+V_DET) ≤ 3.242 V.
This means that some products have 3.059 V for +V_DET and some have 3.242 V.
V_IN
(−V_DET) Max.
(−V_DET) Min.
Detection
voltage
Detection
voltage range
Release voltage
(+V_DET) Max.
(+V_DET) Min.
V_IN
Release
voltage range
V_DOUT
V_DOUT
Delay time
Figure 29 Detection Voltage
Figure 30 Release Voltage
Remark The above figures show the detection voltage and release voltage when the SENSE pin is
connected to VIN.
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Seiko Instruments Inc.