S1167 Datasheet, PDF (14/31 Pages) Seiko Instruments Inc – ULTRA LOW CURRENT CONSUMPTION, HIGH RIPPLE REJECTION

ULTRA LOW CURRENT CONSUMPTION, HIGH RIPPLE REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1167 Series
Rev.3.2_00
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.
The VOUT pin becomes the V_SS level due to the internally divided resistance of several MΩ between the VOUT pin
and the VSS pin.
Note that the current consumption increases if a voltage of 0.3 V to V_IN − 0.3 V is applied to the ON / OFF pin.
The structure of the ON / OFF pin is as shown in Figure 13. Since the ON / OFF pin is neither pulled down nor
pulled up internally, do not use it in the floating status. When not using the ON / OFF pin, connect it to the VSS pin
in the product A type, and connect it to the VIN pin in B type.
Product Type
A
A
B
B
ON / OFF Pin
“L”: ON
“H”: OFF
“L”: OFF
“H”: ON
Table 7
Internal Circuit
Operate
Stop
Stop
Operate
VOUT Pin Voltage
Set value
V_SS level
V_SS level
Set value
Current Consumption
I_SS1
I_SS2
I_SS2
I_SS1
VIN
ON / OFF
VSS
Figure 13
14
Seiko Instruments Inc.