LTM4615 데이터 시트보기 (PDF) - Linear Technology

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LTM4615

Triple Output, Low Voltage DC/DC µModule Regulator

Linear Technology 

LTM4615

TYPICAL PERFORMANCE CHARACTERISTICS

Start-Up

Start-Up

VFB vs Temperature

806

VOUT

1V/DIV

IIN

1A/DIV

VOUT

1V/DIV

IIN

1A/DIV

VIN = 5V

VOUT = 2.5V

COUT = 100μF

NO LOAD

200μs/DIV

(0.01μF SOFT-START CAPACITOR)

4615 G10

VIN = 5V

VOUT = 2.5V

COUT = 100μF

4A LOAD

200μs/DIV

(0.01μF SOFT-START CAPACITOR)

4615 G11

804

802

800

798

796

794

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

4615 G12

Current Limit Foldback

1.6

1.4

1.2

1.0

0.8

0.6

0.4 VOUT = 1.5V

VIN = 5V

0.2

VIN = 3.3V

VIN = 2.5V

0

3

4

5

6

7

8

OUTPUT CURRENT (A)

4615 G13

VLDO

VFB3 vs Temperature

404

403

402

401

1mA

400

399

1.5A

398

397

396

–50 –25

VBOOST3 = 5V

VLDO_IN = 1.5V

VLDO_OUT =1.2V

0 25 50 75

TEMPERATURE (°C)

100 125

4615 G16

Short-Circuit Protection

1.5V Short, No Load

VOUT

0.5V/DIV

IIN

4A/DIV

20μs/DIV

4615 G14

Dropout Voltage vs Input Voltage

200

180

VFB3 = 0.38V

ILDO_OUT =1.5A

160

140

120

100

80

60

40

20

0

1.2 1.4

1.6 1.8 2.0

–40°C

25°C

85°C

125°C

2.2 2.4 2.6

VLDO_IN (V)

4615 G17

Short-Circuit Protection

1.5V Short, 4A Load

VOUT

0.5V/DIV

IIN

1A/DIV

100μs/DIV

4615 G15

Ripple Rejection

60

10kHz

50

1MHz

40

100kHz

30

20

10

0

1.2 1.4

VBOOST3 = 5V

VLDO_OUT =1.2V

IOUT = 800mA

COUT = 10μF

1.6 1.8 2.0 2.2

VLDO_IN (V)

2.4 2.6

4615 G18

4615f

6

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