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S-19243E33H-A8T1U Datasheet(HTML) 32 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) 32 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
32
8. 1 S-19243xxxH Series A / B / C / D type
By charging the built-in capacitor via the built-in constant current source, tSS = 1.0 ms typ. is generated.
8. 2 S-19243xxxH Series E / F / G / H type
tSS can be adjusted by the external capacitor (CSS) connected between the SSC pin and the VSS pin, and is
calculated by using the following calculation.
tSS [ms] = Soft-start coefficient
*1 [ms / nF] × CSS [nF] + tD0*2 [ms]
*1. It is determined by charging the built-in constant current (approx. 2.1
μA) to CSS.
*2. The delay time of internal capacitance.
When the CSS value is sufficiently large, the tD0 value can be disregarded. When the ON / OFF pin is set to OFF,
the electrical charge charged in CSS is discharged by the transistor of the discharge shunt circuit.
Table 30 Soft-start Coefficient [ms / nF]
Operation Temperature
Min.
Typ.
Max.
Tj =
+150°C
0.391
0.528
0.691
Tj =
+105°C
0.398
0.539
0.690
Tj =
+25°C
0.436
0.574
0.704
Tj =
−40°C
0.467
0.604
0.717
Table 31 Delay Time of Internal Capacitnace (tD0)
Operation Temperature
Min.
Typ.
Max.
Tj =
−40°C to +150°C
0.032 ms
0.047 ms
0.108 ms
Caution
The above calculation will not guarantee successful operation. Perform thorough evaluation using
the actual application including the temperature characteristics under the actual usage conditions
to determine CSS capacitance. Refer to " Condition of Application" and " Characteristics (Typical
Data)" for details.


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