LT1373_15 datasheet(2/12 Pages) LINER

2 / 12 page

LT1373

Consult factory for Military grade parts.

(Note 1)

Supply Voltage ....................................................... 30V

Switch Voltage

LT1373 ............................................................... 35V

LT1373HV .......................................................... 42V

S/S Pin Voltage ....................................................... 30V

Feedback Pin Voltage (Transient, 10ms) ..............

±10V

Feedback Pin Current ........................................... 10mA

Negative Feedback Pin Voltage

(Transient, 10ms) .............................................

±10V

Operating Junction Temperature Range

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

°C to 125°C*

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

°C to 125°C

Short Circuit ......................................... 0

°C to 150°C

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

°C to 150°C

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

°C

LT1373CN8

LT1373HVCN8

LT1373CS8

LT1373HVCS8

LT1373IN8

LT1373HVIN8

LT1373IS8

LT1373HVIS8

S8 PART MARKING

ORDER PART

NUMBER

1373H

1373HI

1373

1373I

*Units shipped prior to Date Code 9552 are rated at 100

°C maximum

operating temperature.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VREF

Reference Voltage

Measured at Feedback Pin

1.230

1.245

1.260

VC = 0.8V

1.225

1.245

1.265

IFB

Feedback Input Current

VFB = VREF

150

275

Reference Voltage Line Regulation

2.7V

≤ VIN ≤ 25V, VC = 0.8V

0.01

0.03

%/V

VNFB

Negative Feedback Reference Voltage

Measured at Negative Feedback Pin

– 2.51

– 2.45

– 2.39

Feedback Pin Open, VC = 0.8V

– 2.55

– 2.45

– 2.35

INFB

Negative Feedback Input Current

VNFB = VNFR

–12

– 7

– 2

µA

Negative Feedback Reference Voltage

2.7V

≤ VIN ≤ 25V, VC = 0.8V

0.01

0.05

%/V

Line Regulation

Error Amplifier Transconductance

∆IC = ±5µA

250

375

500

µmho

150

600

µmho

Error Amplifier Source Current

VFB = VREF – 150mV, VC = 1.5V

µA

Error Amplifier Sink Current

VFB = VREF + 150mV, VC = 1.5V

850

1500

µA

Error Amplifier Clamp Voltage

High Clamp, VFB = 1V

1.70

1.95

2.30

Low Clamp, VFB = 1.5V

0.25

0.40

0.52

Error Amplifier Voltage Gain

250

V/ V

VC Pin Threshold

Duty Cycle = 0%

0.8

1.25

Switching Frequency

2.7V

≤ VIN ≤ 25V

225

250

275

kHz

°C ≤ TJ ≤ 125°C

210

250

290

kHz

–40

°C ≤ TJ ≤ 0°C (I Grade)

200

290

kHz

Maximum Switch Duty Cycle

Switch Current Limit Blanking Time

340

500

The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, unless otherwise noted.

TOP VIEW

NFB

S/S

VSW

GND

GND S

VIN

N8 PACKAGE

8-LEAD PDIP

S8 PACKAGE

8-LEAD PLASTIC SO

TJMAX = 125°C, θJA = 100°C/ W (N8)

TJMAX = 125°C, θJA = 120°C/ W (S8)

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

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