Date: 08/12/2008

Dual, quick-PWM step-down controller for notebook power supplies

Maxim introduced the MAX17101, a dual, step-down controller with synchronous rectification for generating 5V/3.3V supplies in battery-powered systems. This device consists of four output-voltage regulators, allowing it to save space while generating multiple supplies for notebook computers.

An internal, 100mA linear regulator can be used to generate either the 5V bias needed for power-up or other lower-power, "always-on" suspend supplies. The controller also includes a low-current (5mA), "always-enabled" linear regulator to power the real-time clock (RTC) when all other notebook regulators are disabled.

1. The device employs low-side MOSFET sensing to provide current sensing for valley current-limit protection.
2. Has in-built output overvoltage- and undervoltage-protection
3. Can save power by operating in pulse-skipping mode, or in ultrasonic mode to avoid audible noise.
4. Can generate 5V/3.3V supplies in battery-powered systems.
5. The device integrates a low-power LDO and an RTC regulator
6. Fully specified over the -40°C to +85°C extended industrial temperature range.
7. Ideal for notebook computers, tablet PCs, and other portable devices.

Packaging: 32-pin TQFN package
Size: 5mm x 5mm,
Prices start at $4.00 (1000-up, FOB USA).

For more information, go to www.maxim-ic.com