LTC3856 datasheet(8/46 Pages) LINER

Part #	LTC3856

Description	Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3875

8

3875fb

For more information www.linear.com/LTC3875

TYPICAL PERFORMANCE CHARACTERISTICS

Quiescent Current vs Input

Voltage without EXTVCC

Undervoltage Lockout Threshold

(INTVCC) vs Temperature

Oscillator Frequency

vs Input Voltage

Shutdown Current

vs Input Voltage

Shutdown Current vs Temperature

Very Low Output Voltage Ripple

TEMPERATURE (°C)

–50

3.0

3.2

3.6

3.8

4.0

5.0

4.4

0

50

3875 G18

3.4

4.6

4.8

4.2

100

150

RISING

FALLING

INPUT VOLTAGE (V)

0

500

600

700

40

3875 G19

400

300

200

0

10

20

30

100

900

VFREQ = INTVCC

VFREQ = 1.22V

VFREQ = GND

800

INPUT VOLTAGE (V)

0

5

15

20

25

50

35

10

20

25

3875 G20

10

40

45

30

5

15

30

35

40

TEMPERATURE (°C)

–50

30

35

40

110

3875 G21

25

20

10

–10

30

70

–30

130

10

50

90

15

50

45

INPUT VOLTAGE (V)

0

4

6

40

3875 G22

2

0

10

20

30

5

15

25

35

8

3

5

1

7

VOUT

LOW RIPPLE

FIGURE 20

10mV/DIV

AC-COUPLED

VOUT

TYPICAL

FRONT PAGE

10mV/DIV

AC-COUPLED

2µs/DIV

3875 G23

VIN = 12V

VOUT = 2.5V

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