S-1711 Datasheet, PDF (25/44 Pages) Seiko Instruments Inc – SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION

SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.3.1_01
S-1711 Series
4. Discharge shunt function (S-1711 Series A/ B/ E/ F type)
The S-1711 Series A/ B/ E/ F type has a built-in discharge shunt circuit to discharge the output capacitance. When
the ON/OFF pin is set to OFF level, turns the output transistor off, and turns the discharge shunt circuit on so that the
output capacitor discharges. These types allow the VOUT pin to reach VSS level faster than the S-1711 Series
C / D / G / H type that does not have a discharge shunt circuit.
Output transistor : OFF
*1
VIN
S-1711 Series
VOUT
ON/OFF
ON/OFF circuit
ON/OFF Pin: OFF
Discharge shunt circuit
: ON
*1
Current flow
Output
capacitor
(C_L)
VSS
*1. Parasitic diode
Figure 26
GND
5. Pull-down/pull-up resistor (S-1711 Series A/ C/ E/ G type)
In the S-1711 Series A/ C/ E/ G type, the ON/OFF pin is internally pulled up to the VIN pin or pulled down to the VSS
pin in the floating status, so the VOUT pin is set to the VSS level.
Note that the IC’s current consumption increases as much as current flows into the pull-up / pull-down resistor when;
the ON / OFF pin is connected to the VIN pin in the A / C type, the ON / OFF pin is connected to the VSS pin in the
E / G type.
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