S-1740 Datasheet, PDF (19/47 Pages) ABLIC Inc. – 5.5 V INPUT, 100 mA VOLTAGE REGULATOR WITH SUPPLY VOLTAGE DIVIDED OUTPUT

POWER MONITORING OUTPUT, 5.5 V INPUT, 100 mA CMOS VOLTAGE REGULATOR WITH 0.5 μA SUPER LOW CURRENT CONSUMPTION
Rev.1.1_00
S-1740/1741 Series
2. 2 PMEN pin
2. 2. 1 S-1740/1741 Series A / C type
The PMEN pin controls the enable circuit.
When "H" is input to the PMEN pin in the S-1740/1741 Series A type, or "L" is input to the PMEN pin in the C
type, the enable circuit operates. This enables the power monitoring output and allows for monitoring of the
power supply voltage. When "L" is input to the PMEN pin in the S-1740/1741 Series A type, or "H" is input to the
PMEN pin in the C type, the enable circuit stops. This disables the power monitoring output, reducing the IC
current consumption.
In addition, the PMEN pin has absolutely no effect on the operation of the regulator block.
Table 16
Product Type
A
PMEN Pin
"H"
Power monitoring output
Enable
Output Voltage
(V_PMOUT)
V_PMOUT^*1
A
"L"
C
"L"
Disable
Enable
V_SS level
V_PMOUT^*1
C
"H"
Disable
V_SS level
*1. Refer to *1 in Table 15 in " Electrical Characteristics".
Current
Consumption
I_SS1 + I_SS1P
I_SS1
I_SS1 + I_SS1P
I_SS1
VOUT Pin
Voltage
V_OUT
V_OUT
V_OUT
V_OUT
Figure 18 shows the internal equivalent circuit structure in relation to the PMEN pin. The PMEN pin is neither
pulled up nor pulled down, so do not use it in the floating status. When not using the PMEN pin, connect it to the
VIN pin. Note that the current consumption increases when a voltage of 0.25 V to V_IN − 0.3 V is applied to the
PMEN pin.
VIN
PMEN
VSS
Figure 18
19