S-1702 Datasheet, PDF (18/45 Pages) Seiko Instruments Inc – Built-in overcurrent protection circuit

SUPER-LOW CURRENT CONSUMPTION 150 mA VOLTAGE REGULATOR WITH BUILT-IN HIGH-ACCURACY VOLTAGE DETECTOR AND RESET INPUT FUNCTION
S-1702 Series
Rev.2.2_01
2. Detector block
2. 1 Detection voltage (−VDET)
The detection voltage (−VDET) is a voltage when the detector output voltage (VDOUT) switches to low. This
detection voltage varies slightly depending on products even having the same specification. The range between
the minimum (−VDET) value and the maximum (−VDET) value due to variation is called the range of detection
voltage (refer to Figure 19).
e.g. In a product with −VDET = 3.0 V, the detection voltage is a value in the range of 2.97 V ≤ (−VDET) ≤ 3.03 V.
This means that some products have 2.97 V for −VDET and some have 3.03 V.
V_OUT
(−VDET) max.
(−V_DET) min.
Detection voltage
Range of detection voltage
VDOUT
Remark This is the case when the regulator output voltage (V_OUT) is monitored by the detector.
Figure 19 Detection Voltage (−VDET)
2. 2 Release voltage (+VDET)
The release voltage (+VDET) is a voltage when the detector output voltage (VDOUT) switches to high. This release
voltage varies slightly depending on products even having the same specification. The range between the
minimum (+VDET) value and the maximum (+VDET) value due to variation is called the range of release voltage
(refer to Figure 20).
e.g. In a product with −VDET = 3.0 V and hysteresis width of 5%, the release voltage is a value in the range of
3.074 V ≤ (+VDET) ≤ 3.227 V.
This means that some products have 3.074 V for +VDET and some have 3.227 V.
Release voltage
(+V_DET) max.
(+V_DET) min.
V_OUT
Range of release voltage
V_DOUT
Delay time
Remark This is the case when the regulator output voltage (V_OUT) is monitored by the detector.
Figure 20 Release Voltage (+VDET)
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