LP3988QMFX-2P85 datasheet(9/17 Pages) TI

Part #	LP3988QMFX-2P85

Description	Micropower, 150-mA Ultralow-Dropout CMOS Voltage Regulator With Power Good

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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LP3988-Q1

www.ti.com

SLAS928A – MARCH 2013 – REVISED JULY 2013

ON/OFF INPUT OPERATION

The LP3988-Q1 is turned off by pulling the VEN pin low, and turned on by pulling it high. If this feature is not

used, the VEN pin should be tied to VIN to keep the regulator output on at all time. To assure proper operation,

the signal source used to drive the VEN input must be able to swing above and below the specified turnon/turnoff

voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.

FAST ON-TIME

The LP3988-Q1 utilizes a speed-up circuit to ramp up the internal VREF voltage to its final value to achieve a fast

output turnon time.

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