General Description

The MAX1960/MAX1961/MAX1962 high-current, high efficiency voltage-mode step-down DC-DC controllers operate from a 2.35V to 5.5V input and generate output voltages down to 0.8V at up to 20A. An on-chip charge pump generates a regulated 5V for MOSFET drive. Additionally, adaptive dead-time drivers allow a wide variety of MOSFETs to be used without risking shoot-through.

Features

♦ 0.5 Accurate Output

♦ Operates from 2.35V to 5.5V Supply

♦ Generates Low Output Voltage Down to 0.8V

♦ On-Chip Charge Pump Provides 5V Gate Drive

♦ Ceramic or Electrolytic Capacitors

♦ 94 Efficiency

♦ External Synchronization from 450kHz to 1.2MHz

♦ 500kHz/1MHz Fixed-Frequency PWM Operation

♦ Fast Transient Response

♦ Two Converters Can Operate 180° Out-of-Phase

♦ ±4 Voltage Margining for System Test

♦ 10 Accurate Current Sensing (MAX1962)

♦ Adaptive Dead Time Prevents Shoot-Through

Applications

   ASIC, FPGA, DSP, and CPU Core and I/O Voltages

   Cellular Base Stations

   Telecom and Network Equipment

   Server and Storage Systems