S11L10 Datasheet, PDF (17/35 Pages) Seiko Instruments Inc – SUPER-LOW OUTPUT VOLTAGE LOW DROPOUT

SUPER-LOW OUTPUT VOLTAGE LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.2_00
S-11L10 Series
5. Overcurrent protection circuit
The S-11L10 Series includes 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
pin and VSS pin. The current when the output pin is short-circuited (I_short) 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
This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps
short circuiting inside, pay attention to the conditions of input voltage and load current so that,
under the usage conditions including short circuit, the loss of the IC will not exceed power
dissipation of the package.
6. Constant current source pull-down (S-11L10 Series B 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 V_SS
level.
Note that the IC’s current consumption increases as much as the constant current flows when the ON / OFF pin is
connected to the VIN pin and the S-11L10 Series B type is operating.
Seiko Instruments Inc.
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