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S-19243XXXA датащи(PDF) 29 Page - ABLIC Inc.

номер детали S-19243XXXA
подробное описание детали  AUTOMOTIVE, 125째C OPERATION, 10 V INPUT, 500 mA VOLTAGE REGULATOR WITH SOFT-START FUNCTION
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производитель  ABLIC [ABLIC Inc.]
домашняя страница  https://www.ablic.com
Logo ABLIC - ABLIC Inc.

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AUTOMOTIVE, 125°C OPERATION, 10 V INPUT, 500 mA VOLTAGE REGULATOR WITH SOFT-START FUNCTION
Rev.3.2_00
S-19243xxxA Series
29
4. Discharge shunt function (S-19243xxxA Series A / B / E / F type)
The S-19243xxxA Series A / B / E / F type has a built-in discharge shunt circuit to discharge the output capacitance.
The output capacitance is discharged as follows so that the VOUT pin reaches the VSS level.
(1) The ON / OFF pin is set to OFF level.
(2) The output transistor is turned off.
(3) The discharge shunt circuit is turned on.
(4) The output capacitor discharges.
Since the S-19243xxxA Series C / D / G / H type does not have a discharge shunt circuit, the VOUT pin is set to the
VSS level through several hundred k
Ω internal divided resistors between the VOUT pin and the VSS pin. The
S-19243xxxA Series A / B / E / F type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt
circuit.
Output transistor: OFF
ON / OFF pin: OFF
VIN
ON / OFF
VSS
ON / OFF circuit
Discharge shunt circuit
: ON
VOUT
*1
*1. Parasitic diode
Current flow
GND
*1
S-19243xxxA Series
Output
capacitor
(CL)
Figure 32
5. Pull-down resistor (S-19243xxxA Series A / C / E / G type)
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS
level.
Note that the IC's current consumption increases as much as current flows into the pull-down resistor of
4.0 M
Ω typ. when the ON / OFF pin is connected to the VIN pin.


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