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US3007

UNISEM
Part Number US3007
Manufacturer UNISEM
Description 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS NON SYNCHRONOUS / LDO CONTROLLER AND 200MmA LDO ON BOARD
Published Apr 16, 2005
Detailed Description US3007 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS NON SYNCHRONOUS , LDO CONTROLLER AND 200MmA LDO ON BOARD PRELIMINARY DAT...
Datasheet PDF File US3007 PDF File

US3007
US3007

Overview
US3007 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS NON SYNCHRONOUS , LDO CONTROLLER AND 200MmA LDO ON BOARD PRELIMINARY DATASHEET FEATURES Provides Single Chip Solution for Vcore, GTL+ ,Clock Supply & 3.
3V Switcher on board Second Switcher Provides Simple Control for the On board 3.
3V supply 200 mA On board LDO regulator Designed to meet Intel VRM 8.
2 and 8.
3 specification for Pentium II™ On board DAC programs the output voltage from 1.
3V to 3.
5V Linear regulator controller on board for 1.
5V GTL+ supply Loss less Short Circuit Protection Synchronous operation allows maximum efficiency Patented architecture allows fixed frequency operation as well as 100% duty cycle during dynamic load Minimum part count Soft Start High current totem pole driver for direct driving of the external Power MOSFET Power Good function Monitors all Outputs OVP Circuitry Protects the Switcher Outputs and generates a Fault output Thermal Shutdown DESCRIPTION The US3007 controller IC is specifically designed to meet Intel specification for Pentium II™ microprocessor applications as well as the next generation of P6 family processors.
The US3007 provides a single chip controller IC for the Vcore , LDO controller for GTL+ and an internal 200mA regulator for clock supply which are required for the Pentium II applications.
It also contains a switching controller to convert 5V to 3.
3V regulator for an on board applications that either uses AT type power supply or it is desired not to rely on the ATX power supply’s 3.
3V output.
These devices feature a patented topology that in combination with a few external components as shown in the typical application circuit ,will provide in excess of 14A of output current for an on- board DC/DC converter while automatically providing the right output voltage via the 5 bit internal DAC .
The US3007 also features, loss less current sensing for both switchers by using the Rds-on of the high side Power MOSFET as the sensing resistor, internal current limiting for the...


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