S-1711A2626-I6T1G Seiko Instruments Inc., S-1711A2626-I6T1G Datasheet - Page 21

• Manufacturer Part Number: S-1711A2626-I6T1G
• Description: Super-small Package 2-circuit High Ripple-rejection Low Dropout Cmos Voltage Regulator
• Manufacturer: Seiko Instruments Inc.

Rev.2.5
3. ON/OFF pins 1 and 2
These pins start and stop the regulator.
When the ON/OFF pin is set to the shutdown level, the entire internal circuit stops operating, and the built-in P-
channel MOS FET output transistor between the VIN and VOUT pins is turned off, reducing current consumption
significantly.
Since the S-1711 Series A/ B/ E/ F types have a built-in discharge shunt circuit to discharge the output capacitance,
the VOUT pin is forcibly set to VSS level. In the S-1711 Series C/ D/ G/ and H types, the VOUT pin is set to VSS
level through several hundred kΩ internal divided resistors between the VOUT and VSS pins. Note that the current
consumption increases when a voltage of 0.3 V to VIN − 0.3 V is applied to the ON/OFF pin.
The ON/OFF pin is configured as shown in Figures 24 and 25. In the S-1711 Series A/ C/ E/ G types, the ON/OFF
pin is internally pulled up or pulled down to VSS when in the floating status, so the VOUT pin is set to the VSS level.
In the S-1711 Series B/ D/ F/ H types, the ON/OFF pin is not internally pulled up or pulled down, so do not use these
types with the ON/OFF pin in the floating status. When the ON/OFF pin is not used in the S-1711 Series B/ D/ F/ H
types, connect the pin to the VIN pin in the B/ D types, and connect it to the VSS pin in the F/ H types.
*1.
_00
Logic Type
(1) S-1711 Series A/ C/ E/ G Type
A/ B/ C/ D
A/ B/ C/ D
E/ F/ G/ H
E/ F/ G/ H
ON/OFF
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Note with caution that the power consumption of the IC is higher by that to be input to pull-up resistance or
pull-down resistance the power off pin when the S-1711 Series A/ C types operated with the ON/OFF pin
connected to VIN and the S-1711 Series E/ G types with the ON/OFF pin connected to VSS (refer to
Figure 24).
E/G type
A/C type
“H”: Power on
“L”: Shutdown
“H”: Shutdown
“L”: Power on
ON/OFF Pin
Figure 24
VSS
VIN
Internal Circuits
Operating
Operating
Stopped
Stopped
Seiko Instruments Inc.
Table 13
(2) S-1711 Series B/ D/ F/ H Type
ON/OFF
VOUT Pin Voltage
Set value
Set value
V
V
SS
SS
level
level
Figure 25
VSS
VIN
Current Consumption
I
I
I
I
S-1711 Series
SS1
SS2
SS2
SS1
*1
*1
21