CS5165H datasheet(6/20 Pages) CHERRY

Part #	CS5165H

Description	Fast, Precise 5-Bit Synchronous Buck Controller for the Next Generation Low Voltage Pentium II Processors

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Manufacturer	CHERRY [Cherry Semiconductor Corporation]

Direct Link	http://www.cherrycorp.com/

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Block Diagram

Q

VID1

ENABLE

SS

VID0

VCC

VGATE(H)

PGnd

VGATE(L)

VID2

VID3

COFF

Maximum

On-Time

Timeout

VCC

R

Q

S

COFF

One Shot

SS High

Comparator

FAULT

Latch

2.5V

Error Amplifier

7µA

VID4

-

+

-

+

-

+

VFB Low

Comparator

PWM

Comparator

SS Low

Comparator

R

Q

S

Q

R

Q

S

2µA

5V

60µA

Normal

Off-Time

Extended

Off-Time

Timeout

Time Out

Timer

(30µs)

Edge Triggered

Off-Time

Timeout

1.25V

FAULT

GATE(H) = ON

GATE(H) = OFF

PGnd

PWM

Latch

0.7V

COMP

Enable

Comparator

-

+

LGnd

VFB

1V

-

+

PWRGD

65µs

Delay

-

PWM Comp

Blanking

-

Circuit Bias

VCC Monitor

5 BIT

DAC

3.87V

3.95V

20k

-8.5%

+8.5%

FAULT

-

+

VCC

6

THRESHOLD ACCURACY

LOWER THRESHOLD

UPPER THRESHOLD

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

% of Nominal DAC Output

-12

-8.5

-5

5

8.5

12

%

s

DAC CODE

VID4 VID3 VID2 VID1 VID0

0

1

0

1.487

1.546

1.606

1.775

1.834

1.893

V

0

1

0

1

1.443

1.501

1.558

1.722

1.779

1.837

V

0

1

0

1

0

1.399

1.455

1.511

1.670

1.725

1.781

V

0

1

0

1

1.355

1.409

1.463

1.617

1.671

1.724

V

0

1

0

1.311

1.363

1.416

1.565

1.617

1.669

V

0

1

0

1

1.267

1.318

1.368

1.512

1.562

1.613

V

0

1

0

1.223

1.272

1.321

1.460

1.508

1.557

V

0

1

1.179

1.226

1.273

1.407

1.454

1.501

V

1

1.097

1.141

1.185

1.309

1.353

1.397

V

Note 1: Guaranteed by design, not 100% tested in production.

Electrical Characteristics: 0˚C < TA < 70˚C; 0˚C < TJ < 125˚C; 8V < VCC < 20V; 2.8V DAC Code (VID4=VID2=VID1=VID0=1, VID3= 0),

CGATE(H) = CGATE(L) = 3.3nF, COFF = 330pF, CSS= 0.1µF; Unless otherwise stated.

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