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S-19243E33H-A8T1U Datasheet(HTML) 28 Page - ABLIC Inc.

Part No. S-19243E33H-A8T1U
Description  AUTOMOTIVE, 105°C OPERATION, 10 V INPUT, 500 mA VOLTAGE REGULATOR WITH SOFT-START FUNCTION
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Maker  ABLIC [ABLIC Inc.]
Homepage  https://www.ablic.com
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S-19243E33H-A8T1U Datasheet(HTML) 28 Page - ABLIC Inc.

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AUTOMOTIVE, 105°C OPERATION, 10 V INPUT, 500 mA VOLTAGE REGULATOR WITH SOFT-START FUNCTION
S-19243xxxH Series
Rev.3.2_00
28
3. ON / OFF pin
The ON / OFF pin controls the internal circuit and the output transistor in order to start and stop the regulator. When
the ON / OFF pin is set to OFF, the internal circuit stops operating and the 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 0.6 V to VIN
− 0.3 V is applied to the ON / OFF pin.
The ON / OFF pin is configured as shown in Figure 30 and Figure 31.
3. 1 S-19243xxxH Series A / C / E / G type
Since the ON / OFF pin is internally pulled down to the VSS pin in the floating status, the VOUT pin is set to the
VSS level.
Refer to " Electrical Characteristics" for the ON / OFF pin current.
3. 2 S-19243xxxH Series B / D / F / H type
Since the ON / OFF pin is neither pulled down nor pulled up, do not use these types in the floating status. When
not using the ON / OFF pin, connect it to the VIN pin.
Table 28
Product Type
ON / OFF Pin
Internal Circuit
VOUT Pin Voltage
Current Consumption
A / B / C / D
E / F / G / H
"H" : ON
Operate
Constant value
*1
ISS1
*2
A / B / C / D
E / F / G / H
"L" : OFF
Stop
Pulled down to VSS
*3
ISS2
*1. The constant value is output due to the regulating based on the set output voltage value.
*2. Note that the IC's current consumption increases as much as current flows into the pull-down resistor when
the ON / OFF pin is connected to the VIN pin and the S-19243xxxH Series A / C / E / G type is operating (refer
to Figure 30).
*3. The VOUT pin voltage of the S-19243xxxH Series A / B / E / F type is pulled down to VSS due to the discharge
shunt circuit (RLOW = 100
Ω typ.), the feedback resistors (Rs and Rf) and a load.
VSS
VIN
ON / OFF
VSS
VIN
ON / OFF
Figure 30 S-19243xxxH Series
A / C / E / G type
Figure 31 S-19243xxxH Series
B / D / F / H type


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