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MAX1907A

Maxim Integrated Products
Part Number MAX1907A
Manufacturer Maxim Integrated Products
Description (MAX1907A / MAX1981A) Quick-PWM Master Controllers
Published Jun 29, 2009
Detailed Description 19-2678; Rev 0; 9/02 www.DataSheet4U.com Quick-PWM Master Controllers for VoltagePositioned CPU Core Power Supplies (I...
Datasheet PDF File MAX1907A PDF File

MAX1907A
MAX1907A

Overview
19-2678; Rev 0; 9/02 www.
DataSheet4U.
com Quick-PWM Master Controllers for VoltagePositioned CPU Core Power Supplies (IMVP-IV) General Description The MAX1907A/MAX1981A are single-phase, QuickPWM™ master controllers for IMVP-IV™ CPU core supplies.
Multi-phase operation is achieved using a Quick-PWM slave controller (MAX1980).
Multiphase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties.
The MAX1907A/ MAX1981A include active voltage positioning with adjustable gain and offset, reducing power dissipation and bulk output capacitance requirements.
The MAX1907A/MAX1981A are intended for two different notebook CPU core applications: either bucking down the battery directly, or 5V system supply to create the core voltage.
The single-stage conversion method allows these devices to directly step down high-voltage batteries for the highest possible efficiency.
Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery) at higher switching frequency provides the minimum possible physical size.
The MAX1907A/MAX1981A meet the IMVP-IV specifications and include logic to interface with the CPU power good signals from the VCCP and VCCMCH rails within the system.
The regulator features power-up sequencing, automatically ramping up to the Intel-specified boot voltage.
The MAX1907A/MAX1981A feature independent four-level logic inputs for setting the boot voltage (B0–B2) and the suspend voltage (S0–S2).
The MAX1907A/MAX1981A include output undervoltage protection, thermal protection, and system power-OK (SYSPOK) input/output.
When any of these protection features detect a fault, the MAX1907A/MAX1981A immediately shut down.
Additionally, the MAX1907A includes overvoltage protection.
The MAX1907A/MAX1981A are available in a thin 40-pin QFN package.
♦ Quick-PWM Master Controllers ♦ Multiphase Conversion with Slave Controller (MAX1980) ♦ Active Voltage Positioning with ...


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