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MAX1977

Maxim
Part Number MAX1977
Manufacturer Maxim
Description High-Efficiency / Quad Output / Main Power- Supply Controllers for Notebook Computers
Published May 6, 2005
Detailed Description 19-2187; Rev 1; 9/04 High-Efficiency, Quad Output, Main PowerSupply Controllers for Notebook Computers General Descript...
Datasheet PDF File MAX1977 PDF File

MAX1977
MAX1977

Overview
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 (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown.
Maxim’s proprietary Quick-PWM™ quick-response, constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining...


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