LT3971AIMSE-TRPBF データシートの表示（PDF） - Linear Technology

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LT3971AIMSE-TRPBF

38V, 1.3A, 2MHz Step-Down Regulator with 2.2µA Quiescent Current

Linear Technology 

LT3971A/LT3971A-5

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.

Switching Waveforms;

Burst Mode Operation

VSW

5V/DIV

Switching Waveforms; Full

Frequency Continuous Operation

VSW

5V/DIV

3.3V Start-Up and Dropout

800kHz

3kΩ LOAD

VIN

IL

500mA/DIV

VOUT

20mV/DIV

IL

500mA/DIV

VOUT

20mV/DIV

1V/DIV

VOUT

5μs/DIV

VIN = 12V, VOUT = 3.3V

ILOAD = 10mA

COUT = 22μF

3971A G28

3.3V Start-Up and Dropout

800kHz

6.7kΩ LOAD

VIN

1μs/DIV

VIN = 12V, VOUT = 3.3V

ILOAD = 1A

COUT = 22μF

3971A G29

5V Start-Up and Dropout

800kHz

5kΩ LOAD

VIN

0.5s/DIV

3971A G30

5V Start-Up and Dropout

800kHz

10Ω LOAD

VIN

1V/DIV

VOUT

1V/DIV

VOUT

1V/DIV

VOUT

0.5s/DIV

3971A G31

0.5s/DIV

3971A G32

0.5s/DIV

3971A G33

Feedback Regulation Voltage

1.6

1.2

0.8

0.4

0

2 2.5 3 3.5 4 4.5 5

INPUT VOLTAGE (V)

3971A G34

Minimum Input Voltage to Switch

5

4

3

2

1

–55 –25

5 35 65 95

TEMPERATURE (°C)

125 155

3971A G35

3971af

7

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