SC1153
SC1153 is PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS manufactured by SEMTECH.
DESCRIPTION
The SC1153 is a low-cost, full featured, synchronous voltage-mode controller designed for use in single ended power supply applications where efficiency is of primary concern. Synchronous operation allows for the elimination of heat sinks in many applications. The SC1153 is ideal for implementing DC/DC converters needed to power advanced microprocessors, such as Pentium® lll, in both single and multiple processor configurations. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows for use of inexpensive n-channel power switches. SC1153 Features include an integrated 5-bit VID DAC, temperature pensated voltage reference, triangle wave oscillator, current limit parator, frequency shift over-current protection, and an accessible, internally pensated error amplifier. Power good signaling, logic patible shutdown, and over voltage protection are also provided. The SC1153 operates at a fixed 200KHz, providing an optimum promise between efficiency, external ponent size, and cost.
Features
- = Low cost / full featured
- = Synchronous operation
- = 5 Bit VID programmable output
- = On-chip power good and OVP functions
- = Designed to meet Intel VRM 8.4 (Pentium® Il I)
- = 1.3V to 3.5V Range, 1% tolerance APPLICATIONS
- = Pentium® Il I Core Supply
- = Multiple Microprocessor Supplies
- = Voltage Regulator Modules (VRM)
- = Programmable Power Supplies
- = High Efficiency DC/DC Conversion ORDERING INFORMATION
DEVICE
(1)
PACKAGE SO-20
TEMP. RANGE (TJ) 0
- 125°C
SC1153CSW.TR
Note: (1) Only available in tape and reel packaging. A reel contains 1000 devices.
PIN CONFIGURATION
BLOCK DIAGRAM
Top View
1.25V REF
VCC CS-
CS+
SHUTDOWN BSTH CURRENT LIMIT UPPER FET LEVEL SHIFT AND DRIVE
70m V VID4 VID3 VID2 VID1 VID0 200k Hz OSCILLATOR S D/A R...
