General Description

The MAX8737 dual high-power linear regulator controllers use external n-channel MOSFETs to generate two independent low-voltage supplies for notebook computers. The MAX8737 delivers low output voltages from 0.5V to 2.5V (±5mV no-load accuracy). The external components allow scalable current design with loads up to 5A with excellent load regulation (1). The regulator operates from a low input voltage, which also reduces the power dissipation in the external n-channel MOSFET. The controller powers the external MOSFET gate driver from the standard 5V system supply.

Features

♦ Low-Cost Dual Linear Regulators

♦ Output Voltage Accuracy ±5mV

♦ Independent 0.5V to 2.5V Reference Inputs

♦ Foldback Current-Limit Protection

♦ Output Undervoltage-Lockout Protection

♦ Thermal Limit (Internal Sensor)

♦ 1.0V to 5.5V Input Supply Voltage (External FET Drain)

♦ 5V Bias Supply Voltage

♦ Independent Power-Good Open-Drain Outputs

♦ Independent Enable Inputs

♦ Soft-Shutdown Output Discharge

♦ Low Supply Current (0.5mA)

♦ 5µA (max) Shutdown Supply Current

Applications

   Notebook and Desktop Computers

   Point-of-Load Regulators

   VMCH and VCCP CPU Supplies

   Low-Voltage Bias Supplies

   Servers