LT3581IMSE-TRPBF Просмотр технического описания (PDF) - Linear Technology

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Компоненты Описание

производитель

LT3581IMSE-TRPBF

3.3A Boost/Inverting DC/DC Converter with Fault Protection

Linear Technology 

TYPICAL APPLICATIONS

Wide Input Range, 3.3V SEPIC Converter Can Operate from 3V to 36V

LT3581

VBAT

3V TO 36V

(VBAT AT START-UP = 6V TO 16V)

200k

D1

18V

C2

10nF

L1

D3

3.3µH

M1

Q1

C1

10µF

SW1 SW2

LT3581

VIN

FB

100k

C3

4.7µF

SHDN

FAULT

RT

GATE

VC

SS

174k

SYNC CLKOUT

GND

10k

C4

2.2µF

D2

10k

L2

470pF • 3.3µH

VOUT

3.3V

0.9A (3V < VBAT < 9V)

1.5A (VBAT = 9V)

24.9k

47pF

1µF

C5

47µF

×2

10k

2.2nF

3581 TA07a

C1: 10µF, 50V, X7R, 1210

C2: 10nF, 25V, X7R, 0603

C3: 4.7µF, 25V, X7R, 1206

C4: 2.2µF, 50V, X7R, 1206

C5: 47µF, 10V, X7R, 1210

D1: CENTRAL SEMI CMHZ5248B-LTZ

D2: CENTRAL SEMI CMMSH2-40

D3: DIODES INC. PD3S230H-7

L1, L2: COILCRAFT MSD7342-332MLB

M1: 2N7002

Q1: MMBT3904

Efficiency

80

VBAT = 9V

75

VBAT = 12V

70

VBAT = 3V

65

60

55

50

0

400

800

1200

1600

LOAD CURRENT (mA)

3581 TA07b

Wide Input Range SEPIC Can Ride Through VBAT

Voltages that Are Higher than VIN_OVP

VBAT

10V/DIV VBAT = 17V

VBAT = 31V

VOUT

2V/DIV

VOUT = 3.3V

IL

2A/DIV

1s/DIV

3581 TA07c

For more information www.linear.com/LT3581

3581fb

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