LT8331 datasheet(5/24 Pages) AD

5 / 24 page

LT8337/LT8337-1

Rev. 0

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS

Efficiency vs Output Current at

Different Switching Frequencies

EN/UVLO Thresholds vs

Temperature

FB Regulation Voltage vs

Temperature

Oscillator Frequency vs

Temperature

Oscillator Frequency with Spread

Spectrum Modulation

Switching Waveforms, Soft-Start

TA ≈ TJ = 25°C, unless otherwise noted.

EN/UVLO RISING

EN/UVLO FALLING

TEMPERATURE (C°)

–50 –25

75 100 125 150

0.98

1.00

1.02

1.04

1.06

1.08

1.10

1.12

Temperature

83371 G05

TEMPERATURE (°C)

–50 –25

75 100 125 150

0.99

0.992

0.994

0.996

0.998

1.002

1.004

1.006

1.008

1.01

83371 G06

1ms/DIV

83371 G09

VOUT

5V/DIV

EN/UVLO

2V/DIV

VIN = 7.2V

FRONT PAGE CIRCUIT

15V

LOAD CURRENT (mA)

0.1

100

1000

100

83371 G04

1MHz, L = 4.7H

2MHz, L = 2.2H

3MHz, L = 1.5H

FRONT PAGE CIRCUIT

VIN = 7.2V

TEMPERATURE (°C)

–50 –25

75 100 125 150

1.9

1.92

1.94

1.96

1.98

2.02

2.04

2.06

2.08

2.1

83371 G07

RT = 47.5kΩ

SYNC/MODE = OPEN

TIME (s)

83371 G08

100

150

200

250

300

1.9

2.1

2.0

2.2

2.3

2.4

2.5

RT = 47.5kΩ

SYNC/MODE = INTVCC

Switching Waveforms, Soft-Start

at Different VIN Voltages

Bottom Switch Current Limit vs

Temperature

Bottom Switch Current Limit vs

Duty Cycle

TEMPERATURE (°C)

–50 –25

75 100 125 150

5.0

5.2

5.4

5.6

5.8

6.0

6.2

6.4

8337 G11

DUTY CYCLE (%)

100

5.0

5.2

5.4

5.6

5.8

6.0

6.2

6.4

83371 G12

1ms/DIV

83371 G10

VOUT

10V/DIV

EN/UVLO

2V/DIV

VIN = 13V

FRONT PAGE CIRCUIT

VOUT AT VIN = 13V

VOUT AT VIN = 9V

VOUT AT VIN = 5V

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