S-1132 Seiko Instruments, S-1132 Datasheet - Page 14

• Manufacturer Part Number: S-1132
• Description: High Ripple Rejection Low Dropout Middle Output Current CMOS Voltage Regulator
• Manufacturer: Seiko Instruments

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DataSheet
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1132 Series
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3. Shutdown pin (ON/OFF pin)
This pin starts and stops the regulator.
When the ON/OFF pin is set to the shutdown level, the operation of all internal circuits stops, and the built-in P-channel
MOS FET output transistor between the VIN pin and VOUT pin is turned off to substantially reduce the current
consumption. The VOUT pin becomes the V
between the VOUT pin and VSS pin.
The structure of the ON/OFF pin is as shown in Figure 14. Since the ON/OFF pin is neither pulled down nor pulled up
internally, do not use it in the floating state. In addition, note that the current consumption increases if a voltage of 0.3
V to V
type is “A” and to the VIN pin if it is “B”.
Logic Type
ON/OFF
IN
A
A
B
B
– 0.3 V is applied to the ON/OFF pin. When the ON/OFF pin is not used, connect it to the VSS pin if the logic
Figure 14
“H”: Power off
“H”: Power on
“L”: Power on
“L”: Power off
ON/OFF Pin
VSS
VIN
Internal Circuits
Operating
Operating
Stopped
Stopped
SS
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level due to the internally divided resistance of several hundreds kΩ
Seiko Instruments Inc.
Table 7
VOUT Pin Voltage
Set value
Set value
V
V
SS
SS
level
level
Current Consumption
I
I
I
I
SS1
SS2
SS2
SS1
Rev.2.0
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