The ISL78236 is a dual output 3A/3A integrated FET buck

regulator for point-of-load power applications. The supply

voltage range is from 2.8V to 6V, allowing for the use of a

single Li+ cell, three NiMH cells or a regulated 3V/5V bus

input. It is optimized for regulating output voltages down to

1.2V. Each channel provides an output current up to 3A which

can be combined to form a single 6A output in current sharing

mode. The two channels operate 180° out-of-phase to reduce

input RMS current and EMI.

The ISL78236 integrates a pair of low ON-resistance P-channel

and N-channel internal MOSFETs to maximize efficiency and

minimize external component count. It can operate up to

100 duty cycle to maximize operating life as battery voltage

drops out. When supplying 3A on each channel, the 100 duty

cycle operation limits the dropout voltage to less than 250mV.

Other features include internal digital soft-start, independent

channel enable for power sequencing, overcurrent protection,

and thermal shutdown.

The ISL78236 is offered in a 24 Ld 4mmx4mm QFN package

with 1mm maximum height. The complete converter occupies

less than 1.5cm2 area.

The ISL78236 is AEC - Q100 qualified and is rated for the

automotive temperature range (-40°C to +105°C).

Features

• Dual 3A/3A independent outputs

• 2.5MHz synchronous buck regulator with internal MOSFETs

up to 95 efficiency

• 2 voltage reference accuracy over-temperature

• 6A current sharing mode operation

• Internal or external compensation

• Peak current limiting and hiccup mode short circuit

protection

• Reverse overcurrent protection

• Over-temperature protection shutdown

• AEC - Q100 qualified

Applications

• DSP and embedded processor power supply

• Infotainment system power

• Automotive point of load power