LT1619 データシートの表示（PDF） - Linear Technology

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LT1619

Low Voltage Current Mode PWM Controller

Linear Technology 

LT1619

TYPICAL APPLICATIO

VIN

4V TO 28V

C4

1.5µF

100V

R3

5.6k

T1

7

9

10 • • 12

2

1

5• •4

3

8

D4

1N4687

4.3V

LOW LEVEL

(IZT = 50µA)

Q1

FMMT3904

D3

MBRS0530T1

87 6

VIN DRV GATE 5

SENSE

LT1619

2

FB

S/S GND VC

14 3

R9

C8

2.2k

1µF

C9

16V

2.2nF

R7

30Ω

C7

220pF

C4, C5: VITRAMON VJ1825Y155MXB (1825/X7R)

C6: TAIYO YUDEN LMK325BJ106MN (1210/X7R)

C8: TAIYO YUDEN EMK316BJ105ML (1206/X7R)

T1: COILTRONICS VP1-0190 (ER11/5, 6 WINDINGS EACH 12.2µH)

6 • • 11

C5

1.5µF

100V

Q3

MMFT3055VL

R6

3.74k

1%

D2

MBRS340T3

R5

100Ω

C1

0.022µF

C6

10µF

10V

VOUT

5V

0.5A

R8

0.015Ω

R10

1.24k

1%

1619 TA01

Figure 19. 2.5W, 4VIN-28VIN to 5V/0.5A Nonisolated Supply

RELATED PARTS

PART NUMBER

LT1370

LT1372

LT1613

LTC1624

LT1680

LTC1872

LT1949

DESCRIPTION

500kHz, 6A Switching Regulator

500kHz, 1.5A Switching Regulator

1.4MHz, SOT-23 DC/DC Converter

Switching Regulator Controller

Synchronous Boost Controller

SOT-23 Boost Controller

600kHz, 1A DC/DC Converter

20 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

COMMENTS

Boost, Buck, Flyback, Forward, Inverting; 42V Switch Voltage

SO-8, 2.7V ≤ VIN ≤ 30V, 42V Switch Voltage

Fixed Frequency, 0.9V ≤ VIN ≤ 10V, 36V Switch Voltage

SO-8, Drives N-Ch MOSFET, 3.5V ≤ VIN ≤ 36V

Synchronous Operation for High Current/High Efficiency

550kHz Fixed Frequency, Current Mode

MSOP8, 1.5V ≤ VIN ≤ 12V, Low-Battery Detector

1619f LT/TP 1000 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 2000

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