General Description

The MAX8732/MAX8733/MAX8734 dual step-down, switch-mode power-supply (SMPS) controllers generate

logic-supply voltages in battery-powered systems. The MAX8732/MAX8733/MAX8734 include two pulse-width

modulation (PWM) controllers, adjustable from 2V to 5.5V or fixed at 5V and 3.3V. These devices feature two linear regulators providing 5V and 3.3V always-on outputs.

Features

♦No Current-Sense Resistor Needed (MAX8734)

♦Accurate Current Sense with Current-Sense Resistor (MAX8732/MAX8733)

♦1.5 Output Voltage Accuracy

♦3.3V and 5V 100mA Bootstrapped Linear Regulators

♦Internal Soft-Start and Soft-Stop Output Discharge

♦Quick-PWM with 100ns Load Step Response

♦3.3V and 5V Fixed or Adjustable Outputs(Dual Mode™)

♦4.5V to 24V Input Voltage Range

♦Enhanced Ultrasonic Pulse-Skipping Mode(25kHz min)

♦Power-Good (PGOOD) Signal

♦Overvoltage Protection Enable/Disable

Applications

Notebook and Subnotebook Computers

PDAs and Mobile Communication Devices

3- and 4-Cell Li+ Battery-Powered Devices