SI9142 Datasheet, PDF (1/11 Pages) Vishay Siliconix – Synchronous Buck Controller for High Performance Processors

Si9142
Vishay Siliconix
Si9142
Synchronous Buck Controller for High Performance Processors
FEATURES
• Over-Voltage Protection
• Programmable Over-Current Protection
• Voltage Mode Control
• Precision 1.3-V, ±1.6% Reference
• Drives N-Channel Switch and Rectifier
• 800-µA Quiescent Current (f_s = 200 kHz)
• 150-µA Standby Current
• Integrated “Power Good” Output
• Synchronization
• Under-Voltage Lockout
DESCRIPTION
The voltage mode, synchronous buck controller is designed
for point-of-use dc/dc conversion in high performance server
and desktop computers. High efficiency is accomplished at full
load by driving high- and low-side n-channel MOSFETs. The
input voltage range has been designed for 4.75 V to 13.2 V to
allow use of either 5 V or 12 V. The 1-MHz switching
frequency combined with the 10-MHz error amplifier provides
ultra-fast transient response necessary in a high performance
microprocessor power supply.
Si9142 is available in a 20-pin SOIC wide-body package and
specified to operate over the commercial (0° to 70°C)
temperature range.
A demo board, Si9142DB, is available.
FUNCTIONAL BLOCK DIAGRAM
FaxBack 408-970-5600, request 70750
www.siliconix.com
S-60752—Rev. C, 05-Apr-99
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