DATASHEET
ISL8033, ISL8033A
Dual 3A Low Quiescent Current High Efficiency Synchronous Buck Regulator
ISL8033 is a dual integrated power controller rated for 3A per
channel with a 1MHz step-down regulator that is ideal for any
low power low-voltage applications. The ISL8033A offers
2.5MHz operation for smaller more compacted design. The
channels are 180В° out-of-phase for input RMS current and EMI
reduction. It is optimized for generating low output voltages
down to 0.8V each. The supply voltage range is from 2.85V to
6V, allowing for the use of a single Li+ cell, three NiMH cells or
a regulated 5V input. It has a guaranteed minimum output
current of 3A each when ISET is connected to VDD. The output
current of each output is selectable by setting ISET pin.
The ISL8033, ISL8033A includes a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. 100%
duty-cycle operation allows less than 250mV dropout voltage
at 3A.
The ISL8033, ISL8033A offers an independent 1ms PowerGood (PG) timer at power-up. When shutdown, ISL8033,
ISL8033A discharges the output capacitor. Other features
include internal digital soft-start, enable for power sequence,
controllable soft-stop output discharge during disabled, startup with pre-biased output, 100% maximum duty cycle for …
