TPS60300, TPS60301, TPS60302, TPS60303

SLVS302B – DECEMBER 2000 – REVISED OCTOBER 2015

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9.3 Feature Description

9.3.1 Power-Good Detector

The power-good output is an open-drain output on the TPS60300 and TPS60301 or a push-pull output on the

TPS60302 and TPS60303. The PG-output pulls low when the output of OUT2 is out of regulation. When the

output rises to within 98% of regulation, the power-good output goes active high. In shutdown, power-good is

pulled low. In normal operation, an external pullup resistor with the TPS60300 and TPS60301 is typically used to

should remain unconnected. Output current at PG (TPS60302, TPS60303) will reduce maximum output current

at OUT2.

9.4 Device Functional Modes

9.4.1 Start-up Procedure

The device is enabled when EN is set from logic low to logic high. CP1 will first enter a DC start-up mode during

OUT1, after that, it will also start switching and boost up the voltage to its nominal value. EN must not exceed the

highest voltage applied to the device.

NOTE

9.4.2 Shutdown

Driving EN low disables the converter. This disables all internal circuits, reducing input current to only 0.05 µA.

Leakage current drawn from the output pins OUT1 and OUT2 is a maximum of 1 µA. The device exits shutdown

once EN is set high (see Start-up Procedure). The typical no-load, start-up time is 400 µs. When the device is

disabled, the load is isolated from the input. This is an important feature in battery operated products because it

extends the battery shelf life.

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