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RC5050M Datasheet

  • RC5050M

  • Programmable DC-DC Converter for Lo Voltage

  • 20頁

  • ETC

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Electronics
Semiconductor Division
RC5050
Programmable DC-DC Converter for Low Voltage
Microprocessors
Features
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Programmable output from 1.3V to 3.5V
85% ef鏗乧iency typical
1% output accuracy
Oscillator frequency adjustable from 80KHz to 1MHz
On-chip Power Good and Enable functions
Over-Voltage Protection
Foldback current limiting
Precision trimmed low TC voltage reference
20 pin SOIC package
Meets Intel Pentium
廬
II speci鏗乧ations using minimum
number of external components
Description
The RC5050 is a DC-DC controller IC which provides an
accurate, programmable output for all Pentium II CPU appli-
cations. The RC5050 uses a 5-bit D/A converter to program
the output voltage from 1.3V to 3.5V. The RC5050 uses a
high level of integration to deliver load currents in excess of
15A from a 5V source with minimal external circuitry. Non-
synchronous operation allows a low cost solution for most
CPU power supply applications. The internal oscillator can
be programmed from 80KHz to 1MHz for additional 鏗俥xi-
bility in choosing external components. An on-board preci-
sion low TC reference achieves tight tolerance voltage
regulation without expensive external components. The
RC5050 also offers integrated functions including Power
Good, Output Enable, over-voltage protection and current
limiting.
Applications
鈥?Programmable power supply for Pentium II
鈥?Voltage Regulator Module (VRM) for Pentium II
processors
鈥?Programmable step-down power supply
Block Diagram
+12V
RC5050
OSC
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+5V
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+
DIGITAL
CONTROL
VO
VREF
5-BIT
DAC
1.24V
REFERENCE
POWER
GOOD
PWRGD
65-5050-01
VID0 VID2 VID4
VID1 VID3
ENABLE
Pentium is a registered trademark of Intel Corporation.
Rev. 1.2.1

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