LT1618 datasheet(9/16 Pages) LINER

Part #	LT1618

Description	Constant-Current/Constant-Voltage 1.4MHz Step-Up DC/DC Converter

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1618

9

sn1618 1618fas

TYPICAL APPLICATIO S

LOAD CURRENT (mA)

0

80

75

70

65

60

50

100

150

200

1618 TA02b

250

300

4.5W Direct Broadcast Satellite (DBS) Power Supply with Short-Circuit Protection

Efficiency

LHCP

RHCP

0V

3.3V

SHDN

IADJ

VC

VIN

SW

ISN

ISP

FB

LT1618

R1

100k

R2

10k

R5

24.9k

VIN

12V

C1

4.7µF

CC

33nF

C3

3.3µF

C4

3.3µF

1618 TA02a

D1

L1

33µH

L3

2.2µH

L2

33µH

3

2

1

9

8

7

GND

510

4

C1: TAIYO YUDEN EMK316BJ475

(408) 573-4150

C2: TAIYO YUDEN TMK316BJ105

(408) 573-4150

C3, C4: TAIYO YUDEN TMK325BJ335

(408) 573-4150

D1: ON SEMICONDUCTOR MBRM140

(800) 282-9855

L1, L2: SUMIDA CR54-330

(847) 956-0666

L3: SUMIDA CR43-2R2

(847) 956-0666

0.068Ω

RC

2k

C2

1µF

Q1

MMBT3904

Q1

FMMT717

ZETEX

D2

MURS110

13.5V/18.5V

22kHz

NETWORK

TUNING

R3

10k

R4

1k

ADD 5V

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LT1618 Datasheet(PDF) 9 Page - Linear Technology

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