MAX1640EEE datasheet(4/11 Pages) MAXIM

Part #	MAX1640EEE

Description	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier

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Manufacturer	MAXIM [Maxim Integrated Products]

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Adjustable-Output, Switch-Mode

Current Source with Synchronous Rectifier

4

_______________________________________________________________________________________

0.45

0.51

0.49

0.47

0.53

0.55

0.57

0.59

0.61

0.63

0.65

4

12

8

16

20

24

28

OFF-MODE SUPPLY CURRENT

(NO-LOAD)

INPUT VOLTAGE (V)

TA = -40°C

TA = +25°C

TA = +85°C

10,000

1

0

50

100 150 200 250

300 350 400

SWITCHING FREQUENCY vs. RTOFF

TOFF (kΩ)

10

100

1000

VOUT = +3V

VOUT = +6V

__________________________________________Typical Operating Characteristics

(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)

40

60

50

80

70

90

100

2

6

8

10

4

12 14 16 18 20 22 24

EFFICIENCY vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

VIN = 12V

VIN = 18V

VIN = 26V

1.460

1.470

1.480

1.490

1.500

1.510

4

12

8

16

20

24

28

MAX1640

OUTPUT CURRENT vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

TA = -40°C

(VOUT = 4V)

TA = +25°C

TA = +85°C

1.450

1.470

1.460

1.490

1.480

1.500

1.510

2

6

8

10

4

12 14 16 18 20 22 24

MAX1640

OUTPUT CURRENT vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

TA = -40°C

TA = +85°C

TA = +25°C

1.450

1.475

1.500

1.525

1.550

4

12

8

16

20

24

28

MAX1641

OUTPUT CURRENT vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

TA = -40°C

(VOUT = 4V)

TA = +25°C

TA = +85°C

1.420

1.460

1.440

1.500

1.480

1.540

1.520

1.560

2

6

8

10

4

12 14 16 18 20 22 24

MAX1641

OUTPUT CURRENT vs. OUTPUT VOLTAGE

VOUT (V)

TA = -40°C

TA = +25°C

TA = +85°C

1.5

1.9

1.7

2.1

2.3

2.5

2.7

2.9

4

12

8

16

20

24

28

QUIESCENT CURRENT

vs. INPUT VOLTAGE (NO-LOAD)

INPUT VOLTAGE (V)

TA = -40°C

TA = +25°C

TA = +85°C

A: OUTPUT CURRENT, D1 = D0 = 1 1A/div

VLOAD = 3V

B: INPUT VOLTAGE, 10V/div

LINE-TRANSIENT RESPONSE

A

B

0A

0V

2ms/div

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