深圳市中立信电子科技有限公司

ISL78322ARZ-T

Dual 2A/1.7A, 2.25MHz High-Efficiency, Synchronous Buck Regulator

开关稳压器 DL CH 2 25MHZ 2 0 A & 1 7ASYNCHG 4X3 1

The ISL78322ARZ-T ISL78322 is a high-efficiency, dual synchronous step-down  DC/DC regulator that can deliver up to 2A/1.7A continuous  output current per channel. The channels are 180° out-ofphase  for input RMS current and EMI reduction. The supply  voltage range of 2.8V to 5.5V allows for the use of a single Li+  cell, three NiMH cells or a regulated 5V input. The current  mode control architecture enables very low duty cycle  operation at high frequency with fast transient response and  excellent loop stability. The ISL78322 operates at 2.25MHz  switching frequency, which allows for the use of small, low cost  inductors and capacitors. Each channel is optimized for  generating an output voltage as low as 0.6V.

Features ISL78322ARZ-T

• Dual 2A/1.7A high-efficiency, synchronous buck regulator

with up to 97% efficiency

• 2.8V to 5.5V input supply range

• 180° out-of-phase outputs reduce ripple current and EMI

• Start-up with prebiased output prevents negative current

flow in output stage

• External synchronization up to 8MHz

• Negative current detection and protection

• 100% maximum duty cycle for lowest dropout

• Internal current mode compensation

• Peak current limiting, hiccup mode short-circuit protection,

and over-temperature protection

• Pb-free (RoHs compliant)

• AEC-Q100 qualified component

Applications ISL78322ARZ-T

• DC/DC POL modules

• μC/μP, FPGA, and DSP power

• Automotive embedded processor power supply systems