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MAX8732

Maxim Integrated Products
Part Number MAX8732
Manufacturer Maxim Integrated Products
Description (MAX8732 - MAX8734) Main Power-Supply Controllers
Published Sep 4, 2008
Detailed Description 19-3355; Rev 0; 8/04 High-Efficiency, Quad-Output, Main PowerSupply Controllers for Notebook Computers General Descript...
Datasheet PDF File MAX8732 PDF File

MAX8732
MAX8732

Overview
19-3355; Rev 0; 8/04 High-Efficiency, Quad-Output, Main PowerSupply Controllers for Notebook Computers 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.
Each www.
DataSheet4U.
com linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the main SMPS outputs.
The MAX8732/MAX8733/MAX8734 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 a relatively constant switching frequency.
The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications.
Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.
The MAX8732 features a 200kHz/5V and 300kHz/3.
3V SMPS for highest efficiency, while the MAX8733 features a 400kHz/5V and 500kHz/3.
3V SMPS for “thin and light” applications.
The MAX8734 provides a pin-selectable switching frequency, allowing either 200kHz/300kHz or 400kHz/500kHz operation of the 5V/3.
3V SMPSs, respectively.
The MAX8732/MAX8733/MAX8734 are available in 28-pin QSOP packages and operate over the extended temperature range (-40°C to +85°C).
The MAX8732/MAX8733/MAX8734 are pin-for-pin upgrades to the MAX1777/MAX1977/MAX1999.
The MAX1999 Evaluation Kit can be used to evaluate the MAX8732/MAX8733/MAX8734...


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