LT1424-5 datasheet(2/16 Pages) LINER

Part #	LT1424-5

Description	Isolated Flyback Switching Regulator with 5V Output

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Manufacturer	LINER [Linear Technology]

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LT1424-5

sn14245 14245fs

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

Consult factory for Military grade parts.

TJMAX = 145°C, θJA = 130°C/ W (N)

TJMAX = 145°C, θJA = 110°C/ W (S)

1

2

3

4

8

7

6

5

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

N8 PACKAGE

8-LEAD PDIP

SHDN

VC

SYNC

SGND

RCCOMP

VIN

VSW

PGND

14245

1424I5

ORDER PART

NUMBER

LT1424CN8-5

LT1424CS8-5

LT1424IN8-5

LT1424IS8-5

S8 PART MARKING

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Power Supply

VIN(MIN)

Minimum Operating Voltage

q

2.8

3.1

V

ICC

Supply Current

q

7.0

9.5

mA

Shutdown Mode Supply Current

q

15

40

µA

SHDN Pin Threshold

q

0.3

0.9

1.3

V

Feedback Amplifier

VREF

Reference Voltage

Measured at VSW Pin (Note 2)

5.23

5.30

5.37

V

q

5.18

5.30

5.42

V

gm

Feedback Amplifier Transconductance

∆IC = ±10µA (Note 3)

q

400

1000

1600

µmho

ISOURCE, ISINK Feedback Amplifier Source or Sink Current

q

30

50

80

µA

VCL

Feedback Amplifier Clamp Voltage

1.9

V

Reference Voltage/Current Line Regulation

5V

≤ VIN ≤ 18V

q

0.01

0.04

%/V

Voltage Gain

(Note 4)

500

V/V

Output Switch

BV

Output Switch Breakdown Voltage

IC = 5mA

q

35

50

V

V(VSW)

Output Switch ON Voltage

ISW = 1A

q

0.55

0.85

V

ILIM

Switch Current Limit

Duty Cycle = 50%, 0

°C ≤ TJ ≤ 125°C

q

1.35

1.6

1.95

A

Duty Cycle = 50%, – 40

°C ≤ TJ ≤ 125°C

q

1.20

1.6

1.95

A

Duty Cycle = 80%

1.3

A

Current Amplifier

Control Pin Threshold

Duty Cycle = Minimum

0.95

1.2

1.3

V

q

0.85

1.2

1.4

V

Control Voltage to Switch Transconductance

2

A/V

(Note 1)

Supply Voltage (VIN) ................................................ 20V

Switch Voltage (VSW) .............................................. 35V

SHDN, SYNC Pin Voltage ........................................... 7V

Operating Junction Temperature Range

Commercial .......................................... 0

°C to 125°C

Industrial ......................................... – 40

°C to 125°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSW Open, VC = 1.4V, unless otherwise specified.

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