LT1738_15 datasheet(4/20 Pages) LINER

Part #	LT1738

Description	Slew Rate Controlled Ultralow Noise DC/DC Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1738

1738fa

TYPICAL PERFOR A CE CHARACTERISTICS

Feedback Voltage and Input

Current vs Temperature

Negative Feedback Voltage and

Input Current vs Temperature

Feedback Overvoltage Shutdown

vs Temperature

Error Amp Transconductance vs

Temperature

Error Amp Output Current vs

Feedback Pin Voltage from Nominal

VC Pin Threshold and Clamp

Voltage vs Temperature

CS Pin Trip Voltage and CS Fault

Voltage vs Temperature

SHDN Pin On and Off Thresholds

vs Temperature

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G01

1.260

1.258

1.256

1.254

1.252

1.250

1.248

1.246

1.244

1.242

1.240

750

700

650

600

550

500

450

400

350

300

250

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G02

2.480

2.485

2.490

2.495

2.500

2.505

2.510

2.515

2.520

3.2

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G03

1.70

1.65

1.60

1.55

1.50

1.45

1.40

1.35

1.30

1.25

1.20

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G04

2000

1900

1800

1700

1600

1500

1400

1300

1200

1100

1000

FEEDBACK PIN VOLTAGE FROM NOMINAL (mV)

–400 –300 –200 –100

0

100 200 300 400

1738 G05

500

400

300

200

100

0

–100

–200

–300

–400

–500

–40

°C

125

°C

25

°C

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G06

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

CLAMP

THRESHOLD

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G07

240

220

200

180

160

140

120

100

80

FAULT

TRIP

TEMPERATURE (

°C)

–50 –25

0

25

50

75

100 125 150

1738 G08

1.50

1.45

1.40

1.35

1.30

1.25

ON

OFF

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LT1738 Datasheet(PDF) 4 Page - Linear Technology

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