S-13R1 Datasheet, PDF (19/49 Pages) Seiko Instruments Inc – REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

Rev.1.2_01
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
3. ON / OFF pin
This pin starts and stops the regulator.
When the ON / OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in
P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing current
consumption significantly.
Note that the current consumption increases when a voltage of 0.3 V to 1.0 V is applied to the ON / OFF pin. The
ON / OFF pin is configured as shown in Figure 19 and Figure 20.
3. 1 S-13R1 Series A / C type
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS
level.
3. 2 S-13R1 Series B / D type
The ON / OFF pin is not internally pulled down to the VSS pin, so do not use this pin in the floating status. When
not using the ON / OFF pin, connect the pin to the VIN pin.
Table 13
Product Type ON / OFF Pin
Internal Circuit
VOUT Pin Voltage
Current Consumption
A / B / C / D "H": ON
Operate
Set value
ISS1^*1
A/B
C/D
"L": OFF
"L": OFF
Stop
Stop
VSS level
ISS2
High-Z ≅ VSS level
ISS2
*1. Note that the IC’s current consumption increases as much as current flows into the constant current of
0.1 μA typ. when the ON / OFF pin is connected to the VIN pin and the S-13R1 Series A / C type is
operating (refer to Figure 19).
VIN
VIN
ON / OFF
ON / OFF
VSS
Figure 19 S-13R1 Series A / C type
VSS
Figure 20 S-13R1 Series B / D type
19