LTC3827 datasheet(7/36 Pages) LINER

Part #	LTC3827

Description	Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3827

7

3827ff

TYPICAL PERFORMANCE CHARACTERISTICS

TRACK/SS Pull-Up Current

vs Temperature

Shutdown (RUN) Threshold

vs Temperature

Regulated Feedback Voltage

vs Temperature

Sense Pins Total Input Current

vs Temperature

Shutdown Current

vs Input Voltage

Oscillator Frequency

vs Temperature

TEMPERATURE (°C)

–45

1.00

1.05

1.10

75

3827 G19

0.95

0.90

0.80

–15

15

45

–30

90

0

30

60

0.85

1.20

1.15

TEMPERATURE (°C)

–45

0.80

0.85

0.90

75

3827 G20

0.75

0.65

0.50

–15

15

45

–30

90

0

30

60

0.55

0.70

0.60

1.00

0.95

TEMPERATURE (°C)

–45

800

802

804

75

3827 G21

798

796

792

–15

15

45

–30

90

0

30

60

794

808

806

TEMPERATURE (°C)

–45

–800

–700

–500

–400

–300

200

–100

–15

15

30

90

3827 G22

–600

0

100

–200

–30

0

45

60

75

VOUT = OV

VOUT = 3.3V

VOUT = 10V

INPUT VOLTAGE (V)

510

0

10

25

15

25

30

3827 G23

5

20

15

20

35

TEMPERATURE (°C)

–45

0

100

300

400

500

800

700

–5

35

55

3827 G24

200

600

–25

15

75

95

VPLLLPF = INTVCC

VPLLLPF = FLOAT

VPLLLPF = GND

Undervoltage Lockout Threshold

vs Temperature

Oscillator Frequency

vs Input Voltage

Shutdown Current

vs Temperature

TEMPERATURE (°C)

–45

3.2

3.3

3.5

3.6

3.7

4.2

3.9

–15

15

30

3827 G25

3.4

4.0

4.1

3.8

–30

0

60

45

75

90

FALLING

RISING

INPUT VOLTAGE (V)

510

15

25

30

3827 G26

20

35

392

394

398

400

402

396

404

TEMPERATURE (°C)

–45

75

3827 G27

–15

15

45

–30

90

0

30

60

0

2

6

8

10

4

12

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