Linear Technology LTC1628 Manual Download Page 4

4

DEMO MANUAL DC236

DESIGN-READY SWITCHERS

MANUFACTURER

USA

EUROPE

JAPAN

HONG KONG

SINGAPORE

TAIWAN/KOREA

AVX

(843) 448-9411

44-1252-770-000

81-751-592-3897

852-2-363-3303

65-258-2833

886-2-516-7010

BH Elect.

(612) 894-9590

Central

(516) 435-1110

49-0816-143-963

822-2-268-9795

Coilcraft

(847) 639-6400

886-2-264-3646

65-296-6933

886-2-264-3646

Fairchild

(888) 522-5372

44-1793-856-856

81-3-5620-6175

852-2-273-7200

65-252-5077

886-2-712-0500

Gowanda

(716) 532-2234

IR

(310) 322-3331

44-1883-713-215

81-3-3983-0086

852-2-803-7380

65-221-8371

822-2-858-8773

IRC

(316) 992-7900

852-2-388-0629

65-280-0200

0342-43-2822

Kemet

(864) 963-6300

44-1279-757-343

852-2-305-1168

65-484-2220

886-2-752-8585

Linear Technology

(408) 432-1900

44-1276-677-676

81-3-3267-7891

852-2-803-7380

65-753-2692

886-2-521-7575

Midcom

(605) 886-4385

Murata

(800) 831-9172

Marcon

(847) 696-2000

ON Semiconductor

(602) 244-6600

81-3-3521-8315

852-2-662-9298

65-481-8188

Panasonic

(201) 348-7522

REFERENCE
DESIGNATOR

QUANTITY

PART NUMBER

DESCRIPTION

VENDOR

TELEPHONE

C1

1

EEFUE0J151R

150

µ

F 6.3V 20% Capacitor

Panasonic

(714) 373-7334

C2

1

EEFUE0G181R

180

µ

F 4V 20% Capacitor

Panasonic

(714) 373-7334

C3 to C6, C18

5

0603ZC104MAT1A

0.1

µ

F 10V 20% X7R Capacitor

AVX

(843) 946-0362

C7, C8, C11, C12

4

06033A102JAT1A

1000pF 25V 5% NPO Capacitor

AVX

(843) 946-0362

C9, C10

2

06035A330JAT1A

33pF 50V 5% NPO Capacitor

AVX

(843) 946-0362

C13, C14

2

06035C181JAT1A

180pF 50V 5% NPO Capacitor

AVX

(843) 946-0362

C15

1

0805ZC105MAT1A

1

µ

F 10V 20% X7R Capacitor

AVX

(843) 946-0362

C16

1

TACR475M010R

4.7

µ

F 10V 20% Tantalum Capacitor

AVX

(207) 282-5111

C17

1

THCR70E1H226ZT

22

µ

F 50V Y5U Capacitor

Marcon

(847) 696-2000

C19 to C21

3

0603ZC103KAT1A

0.01

µ

F 10V 10% X7R Capacitor

AVX

(843) 448-9411

D1, D2

2

MBRM140T3

40V 1A Schottky Diode

ON Semiconductor (602) 244-6600

D3, D4

2

CMDSH-3TR

30V 0.1A Schottky Diode

Central

(516) 435-1110

L1, L2

2

CEP123-8R0MC or

8

µ

H Low Profile Inductor

Sumida

(408) 982-9660

CDRH125-100MC or

10

µ

H Inductor

ETQP6F102HFA

10

µ

H Inductor

Panasonic

(714) 373-7334

M1, M2

2

FDS8936A

Dual N-Channel MOSFET

Fairchild

(408) 822-2126

R1, R2

2

LR1206-01-R015-F

0.015

 1/4W 1% Chip Resistor

IRC

(316) 992-7900

R3

1

CR16-1053FM

105k 1/16W 1% Chip Resistor

TAD

(800) 508-1521

R4

1

CR16-6342FM

63.4k 1/16W 1% Chip Resistor

TAD

(800) 508-1521

R5, R6

2

CR16-2002FM

20k 1/16W 1% Chip Resistor

TAD

(800) 508-1521

R7, R8

2

CR16-153JM

15k 1/16W 5% Chip Resistor

TAD

(714) 255-9123

R9, R10, R12

3

CR16-105JM

1M 1/16W 5% Chip Resistor

TAD

(714) 255-9123

R11

1

CR16-100JM

10

 1/16W 5% Chip Resistor

TAD

(714) 255-9123

U1

1

LTC1628CG28

Multiphase Dual DC/DC Controller IC

LTC

(408) 432-1900

PARTS LIST

   A  UFACTURER TELEPHO  E DIRECTORY

U

U

W

Summary of Contents for LTC1628

Page 1: ...f operation are available Burst ModeTM operation offers highest efficiency while Burst Disable modeprovidesconstant frequencyoperationdownto1 of maximum designed load The frequency is externally DC co...

Page 2: ...MOSFETs may be dam aged The recommended VIN to start is 7V 5 Switch on the desired channel s by removing the RUN SS1 or RUN SS2 jumper 6 Measure VOUT1 and VOUT2 to verify output voltages of 5V 0 1V a...

Page 3: ...9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 U1 LTC1628 C7 1000pF C13 180pF R11 10 L2 10 H L1 10 H R2 0 015 R1 0 015 C5 0 1 F R3 105k 1 R5 20k 1 R9 1M R12 1M R10 1M TP1 3 3V LDO TP2 5V...

Page 4: ...43 946 0362 C7 C8 C11 C12 4 06033A102JAT1A 1000pF 25V 5 NPO Capacitor AVX 843 946 0362 C9 C10 2 06035A330JAT1A 33pF 50V 5 NPO Capacitor AVX 843 946 0362 C13 C14 2 06035C181JAT1A 180pF 50V 5 NPO Capaci...

Page 5: ...nificant reduc tion in total RMS input current which in turn allows less expensive input capacitors to be used reduces shielding requirements for EMI and improves real world operating efficiency Figur...

Page 6: ...proprietary technique to allow 2 phase operation In addition isolation between the two channels becomes more critical with 2 phase operation because switch transitions in one channel could poten tiall...

Page 7: ...daryvoltageabovethe0 8V hysteresis level The FLTCPL pin allows coupling between the two con trollers in several situations The controllers will act independently when FLTCPL is grounded When the pin i...

Page 8: ...omponents that may not be necessary depending upon the particular design include C9 C10 C13 C14 C18 and R11 Certain components may be larger than specific applications will require Theoutputcapacitanc...

Page 9: ...on is worsened by a factor of the turns ratio for any secondary flyback winding Keep these switch node related PC traces small and away from the quiet side of theIC notjustaboveandbeloweachotherontheo...

Page 10: ...ins of the IC Peak currents exceed 1A when charging the gates of the bottom MOSFETs Component Side Silkscreen Copper Layer 1 Top The traces that sense the voltage across the current sensingresistorcan...

Page 11: ...te and reliable However no responsibility is assumed for its use Linear Technology Corporation makes no represen tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpate...

Page 12: ...E 2000 0 3000 0 200 0 200 0 C A A B F F F F F F F F F F F G G G G G G G G G G G G G G G F B B B B B HOLE CHART NUMBER SYMBOL DIAMETER OF HOLES PLATED A 120 4 YES B 94 6 YES C 70 2 NO D 64 2 YES E 30 2...

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