S-11L10 Datasheet, PDF (17/35 Pages) Seiko Instruments Inc – SUPER-LOW OUTPUT LOW DROPOUT CMOS VOLTAGE REGULATOR

SUPER-LOW OUTPUT VOLTAGE LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.0_00
S-11L10 Series
5. Overcurrent protection circuit
The S-11L10 Series has an overcurrent protection circuit having the characteristics shown in “(1) Output Voltage vs.
Output Current (When Load Current Increases) (Ta = 25°C)” in “„ Characteristics (Typical Data)”, in order to
protect the output transistor against an excessive output current and short circuiting between the VOUT and VSS
pins. The current (I_short) when the output pin is short-circuited is internally set at approx. 150 mA (typ.), and the
normal value is restored for the output voltage, if releasing a short circuit once.
Caution
Using the overcurrent protection circuit is to protect the output transistor from accidental
conditions such as short circuited load and the rapid and large current flow in the large capacitor.
The overcurrent protection circuit is not suitable for use under the short circuit status or large
current flowing (150 mA or more) that last long.
6. Constant current source pull-down (S-11L10 Series B type)
In the S-11L10 Series B type, the ON / OFF pin is internally pulled down to VSS, so the VOUT pin is in the V_SS level
in the floating status.
In the S-11L10 Series B type, note that the ON / OFF pin is connected to VIN and during operation, IC’s current
consumption increases as much as the constant current flows.
Seiko Instruments Inc.
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