DATASHEET
ISL78236 FN8624
Rev.1.00
Mar. 14, 2017 Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator
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 180В° out of phase to reduce
input RMS current and EMI. Features 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. Peak current limiting and hiccup mode short circuit
protection The ISL78236 is offered in a 24 Ld 4mmx4mm QFN package
with 1mm maximum height. The complete converter occupies …
