DATASHEET
ISL9103, ISL9103A
500mA 2.4MHz Low IQ High Efficiency Synchronous Buck Converter FN6828
Rev 3.00
December 9, 2015 The ISL9103, ISL9103A is a 500mA, 2.4MHz step-down
regulator, which is ideal for powering low-voltage
microprocessors in compact devices such as PDAs and
cellular phones. It is optimized for generating low output
voltages down to 0.8V. The supply voltage range is from
2.7V to 6V allowing the use of a single Li+ cell, three NiMH
cells or a regulated 5V input. It has guaranteed minimum
output current of 500mA. A high switching frequency of
2.4MHz pulse-width modulation (PWM) allows using small
external components. Under light load condition, the device
operates at low IQ skip mode with typical 20ВµA quiescent
current for highest light load efficiency to maximize battery
life, and it automatically switches to fixed frequency PWM
mode under heavy load condition. Features The ISL9103, ISL9103A includes a pair of low
ON-resistance P-Channel and N-Channel internal MOSFETs
to maximize system efficiency and minimize the external
component count. 100% duty-cycle operation allows less
than 300mV dropout voltage at 500mA. Ultrasonic Switching Frequency at Skip Mode to Prevent
Audible Frequency Noise (For ISL9103A Only) The ISL9103, ISL9103A offers internal digital soft-start, …
