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LTC1553CG

5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor

Linear Technology 

LTC1553

APPLICATIONS INFORMATION

5.6k 5.6k

5.6k

0.1µF

PENTIUM II

SYSTEM

5V

1.8k

DALE

NTHS-1206N02

MOUNT THERMISTER

IN CLOSE THERMAL

PROXIMITY TO Q1

PWRGD VCC

FAULT

OT

5

VID0 TO VID4

OUTEN

C1

150pF

COMP SS

RC

8.2k

CC

CSS

0.01µF 0.1µF

+

10µF 2.7k

1N5817

IMAX PVCC

0.1µF

LTC1553

G1

20Ω

IFB

SGND

G2

GND SENSE

0.1µF

VIN

5V

+ CIN**

1200µF

×4

Q1*

LO†

2µH

18A

+ COUT††

Q2*

330µF

×7

vOUT

*SILICONIX SUD50N03-10

**SANYO 10MV1200GX

†COILTRONICS CTX02-13198 OR

PANASONIC 12TS-2R5SP

†† AVX TPSE337M006R0100

1553 F13

Figure 13. Single Supply LTC1553 5V to 1.8V-3.5V Application with Thermal Monitor

21

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