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US3010

UNISEM
Part Number US3010
Manufacturer UNISEM
Description 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC
Published Apr 16, 2005
Detailed Description US3010/3010A 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC PRELIMINARY DATASHEET FEATURES Dual Layout Compatible wi...
Datasheet PDF File US3010 PDF File

US3010
US3010

Overview
US3010/3010A 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC PRELIMINARY DATASHEET FEATURES Dual Layout Compatible with SC1152 Designed to meet Intel specification of VRM8.
2 & VRM8.
3 for Pentium II™ On board DAC programs the output voltage from 1.
3V to 3.
5V (US3010) & 1.
8V to 3.
5V for US3010A 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 Over Voltage Protection Output Soft Start High current totem pole driver for direct driving of the external Power MOSFET Power Good function DESCRIPTION The US3010 family of controller ICs are specifically designed to meet Intel specification for Pentium II™ and Pentium Pro™ microprocessor applications as well as the next generation P6 family processors.
These products feature a patented topology that in combination with a few external components as shown in the typical application circuit ,will provide in excess of 16A of output current for an on- board DC/DC converter while automatically providing the right output voltage via the 5 bit internal DAC .
These devices also feature, loss less current sensing by using the Rds-on of the high side Power MOSFET as the sensing resistor, a Power Good window comparator that switches its open collector output low when the output is outside of a ±10% window and an OVP output.
Other features of the device are ; Undervoltage lockout for both 5V and 12V supplies , an external programmable soft start function as well as programming the oscillator frequency by using an external capacitor.
APPLICATIONS Pentium II & Pentium Pro™ processor DC to DC converter application Low cost Pentium with AGP TYPICAL APPLICATION L1 L2 Q1 C5 C3 R3 R5 R2 R4 Q2 R6 R7 R9 C8 R8 R10 C10 5V C1 C7 C4 C6 12V R12 R13 R1 12 V12 9 NC 2 V5 6 CS+ 8 HDrv 5 CS- 11 LDrv 10 Gnd 15 Vfb En 14 OutEn Power Good C11 US3010 13 SS/BstH C2 D4 16 D3 17 D2 18 D1 19 D0 20 NC/ PGndH 7 ...


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