s-1702ecc01-i6t1g Seiko Instruments Inc., s-1702ecc01-i6t1g Datasheet - Page 25

• Manufacturer Part Number: s-1702ecc01-i6t1g
• Description: Ultra-low Current Consumption 150 Ma Voltage Regulator With Built-in High-accuracy Voltage Detector And Reset Input Function
• Manufacturer: Seiko Instruments Inc.

ON / OFF
ULTRA-LOW CURRENT CONSUMPTION 150 mA VOLTAGE REGULATOR WITH BUILT-IN HIGH-ACCURACY VOLTAGE DETECTOR AND RESET INPUT FUNCTION
Rev.1.1
RESX
VSS
VIN
2. 2. 1 Output transistor
2. 2. 2 Discharge shunt function
_00
The S-1702 Series regulator block uses a low on-resistance Pch MOSFET transistor as the output transistor.
The discharge shunt function is enabled in the S-1702Axx, Bxx, Cxx, Exx, Fxx, Gxx, Jxx, Lxx, and Nxx.
When the regulator block is stopped, the output transistor is turned off and the discharge shunt circuit is
turned on according to the combination of the ON / OFF and the RESX pins.
The VOUT pin is set at the V
they disable the discharge shunt function.
Caution Be sure that V
This operation causes the charge in the output capacitor (C
pin the V
*1. Parasitic diode
Reference
SS
voltage
damaged due to inverse current flowing from the VOUT pin through a parasitic diode to the
VIN pin.
circuit
level.
V
IN
Reset circuit
ON / OFF
Output transistor: OFF
circuit
V
ref
OUT
Figure 27 Discharge Shunt Function
SS
does not exceed V
−
+
level in a shorter time than the S-1702Dxx, Hxx, Kxx, Mxx, and Pxx, because
Seiko Instruments Inc.
circuit
Logic
V
fb
*1
R
R
s
f
IN
+ 0.3 V to prevent the voltage regulator from being
Discharge
shunt circuit :
ON
L
) to be discharged, and forcibly sets the VOUT
S-1702 Series
V
OUT
*1
VOUT
Output capacitor
Current flow
S-1702 Series
GND
C
L
25