TPS60140, TPS60141

SLVS273A – FEBRUARY 2000 – REVISED NOVEMBER 2015

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9.4 Device Functional Modes

9.4.1 Start-Up Procedure and Shutdown

During start-up (that is, when ENABLE is set from logic low to logic high), the output capacitor is charged up with

limit, the IC begins switching. This precharging of the output capacitor ensures a short start-up time. In addition,

the inrush current into an empty output capacitor is limited because the current through the switches is limited

before the charge pump starts switching.

Driving ENABLE low places the device in shutdown mode. This disables all switches, the oscillator, and control

logic. The device typically draws 0.05 µA of supply current in this mode. Leakage current drawn from the output

is as low as 1 µA (maximum). The device exits shutdown once ENABLE is set to a high level. When the device is

in shutdown, the load is isolated from the input.

9.4.2 Short-Circuit Protection

The TPS6014x devices are also short-circuit protected. The output current is limited to typically 100 mA during a

up mode is met, the device stops switching and controls the on-resistance of the appropriate MOSFET switches

to limit the current.

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