19-2187; Rev 1; 9/04
High-Efficiency, Quad Output, Main PowerSupply Controllers for Notebook Computers
General Description
The MAX1777/MAX1977/MAX1999 dual step-down, switch-mode power-supply (SMPS) controllers generate logic-supply voltages in battery-powered systems.
The MAX1777/MAX1977/MAX1999 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.
Each linear
regulator provides up to 100mA output current with automatic linear
regulator bootstrapping to the main SMPS outputs.
The MAX1777/MAX1977/MAX1999 include on-board power-up sequencing, a power-good (...