Features

• Input voltage range from 2.2 to 5 V

• 12 mΩ typ. N-channel FET RDS(on)

• 7 A continuous current capability

• PWM control signal from 4 Hz to 5 kHz, with 30 to 100 duty cycle

• 30 μA battery supply current

• 2 programmable timers: T1, T3

• 1 fixed timer T2

• Input undervoltage lockout

• VFQFPN 3x3x0.9 16L, 0.5 mm pitch package

Description

The STEC01 is an integrated programmable 12 mΩ power switch managed by the

timer based circuitry.

The device has 3 timers designed to interrupt the ground path of a power application

after a maximum on-time and inhibits the restart of the platform during a cooling

window. The maximum on-time can be set from few seconds to hundreds of seconds,

while the cooling window can be programmed to 69, 345 and 1380 seconds.

3 multi-level input pins, combined with a programmable oscillator and a fixed

oscillator, are used to set the timing.

An input continuous or pulsed signal applied to the PWM pin starts the internal logic

and counters. In case of a normal operation, as soon as the activity on the PWM pin

stops, the device automatically enters idle mode, waiting for a new valid PWM signal

to be applied. If the device detects a fault condition, a reset pulse is generated and

the safety MOSFET is turned off and managed according to a predefined state

machine.

The STEC01 has a continuous current capability up to 7 A through the internal power

MOSFET. A higher current can be supported by using an external power transistor

driven through GDRV pin.

A rising edge on the HW_RESET input pin generates a 57 ms pulse on the

RESET_FAULT pin. This function can be used to notify the connection of an external

power source (e.g. USB).

Applications

• Electronic cigarettes

• Timing/reset circuitry

• Ground path protection circuitry