LTC3884 datasheet(9/26 Pages) AD

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LTC7883

Rev. 0

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS

Soft-Start Ramp

Start-Up Into a Prebiased Load

Soft-Off Ramp

Output Overvoltage Threshold

Error vs Temperature

Output Overcurrent Threshold

Error vs Temperature

PWM Frequency vs Temperature

TEMPERATURE (°C)

–40

0.10

0.05

–0.10

–0.05

–0.15

7883 G25

120

100

–20

VOUT_OV_FAULT_LIMIT = 2V

VOUT RANGE = 1

1.2

0.8

0.4

1.0

0.6

0.2

–0.2

–0.4

7883 G26

TEMPERATURE (°C)

–40

120

100

–20

500.2

500.1

499.9

499.7

500.0

499.8

499.6

499.5

7883 G27

TEMPERATURE (°C)

–40

120

100

–20

FREQUENCY_SWITCH = 500kHz

RUN

2V/DIV

VOUT

1V/DIV

5ms/DIV

TOFF_DELAY = 10ms

TOFF_FALL = 5ms

7883 G21

VOUT

0.5V/DIV

1ms/DIV

7883 G19

IL1, IL2

10A/DIV

VIN = 12V

VOUT

0.5V/DIV

1ms/DIV

7883 G20

IL1, IL2

10A/DIV

VIN = 12V

VOUT_COMMAND INL

Regulated Output vs Temperature

VOUT_COMMAND DNL

VOUT (V)

0.3

1.5

1.0

0.5

–0.5

–1.0

4.3

5.1

7883 G23

3.5

1.1

2.7

1.9

VOUT (V)

0.3

1.0

0.8

0.4

–0.4

0.6

0.2

–0.2

–0.6

–0.8

4.3

5.1

7883 G24

3.5

1.1

2.7

1.9

TEMPERATURE (°C)

–40

1.8000

1.7995

1.7985

1.7975

1.7990

1.7980

1.7970

7883 G22

120

100

–20

VOUT_COMMAND = 1.8V

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