LTC1753 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC1753

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

Linear Technology 

LTC1753

TEST CIRCUITS

3k

100pF

+

3k

10µF

100pF

VID0 TO VID4

C1

150pF

RC

15k

CC

4700pF

VCC

5V

+

0.1µF 10µF

PVCC

12V

0.1µF

OUTEN VCC

PWRGD

FAULT

LTC1753

PVCC IFB

G1

IMAX

VID0 TO VID4

G2

COMP SS SGND GND SENSE VFB

VIN

5V

+ CIN**

1200µF

×4

Q1A*

LO†

Q1* 1.3µH

15A

NC

Q2A*

+ COUT††

2700µF

×5

Q2*

NC

VOUT

0.1µF

1µF

Figure 2

* SILICONIX Si4410

** SANYO 10MV1200GX

† PANASONIC ETQP 6FIR3LFA

†† SANYO 6MV2700GX

1753 F02

VCC

NC

NC

NC

VCC

VID0 VID1 VID2 VID3 VID4

VID0 VID1 VID2 VID3 VID4

OUTEN

PWRGD

FAULT

LTC1753

COMP

SS

SGND GND

VCC IFB

PVCC

G1

IMAX

G2

VFB

SENSE

NC

0.1µF

PVCC

+

10µF

+

NC

0.1µF

10µF

NC

NC

NC

1573 F03

Figure 3

+

10µF

0.1µF

NC

VOUT

VCC PVCC

5V

12V

VCC

IFB

PVCC

G1

VFB LTC1753

SENSE

G2

SGND GND

+

0.1µF

10µF

G1 RISE/FALL

5000pF

G2 RISE/FALL

5000pF

Figure 4

tr

90%

50%

10%

tf

90%

50%

10%

tNOL

50%

tNOL

50%

1753 F04

9

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