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LT1370

sn1370 1370fs

BSOLUTEXI

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

Switch Voltage

LT1370 ............................................................... 35V

LT1370HV .......................................................... 42V

S/S, SHDN, SYNC Pin Voltage ................................ 30V

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

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

Negative Feedback Pin Voltage

(Transient, 10ms) ............................................. ±10V

Operating Ambient Temperature Range ...... 0°C to 70°C

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

ELECTRICAL C

HARA TERISTICS

VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, TA = 25°C unless otherwise noted.

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

250

550

●

900

Reference Voltage Line Regulation

2.7V ≤ VIN ≤ 25V, VC = 0.8V

●

0.01

0.03

%/V

VNFR

Negative Feedback Reference Voltage

Measured at Negative Feedback Pin

– 2.525

– 2.48

– 2.435

Feedback Pin Open, VC = 0.8V

● –2.560

– 2.48

– 2.400

INFB

Negative Feedback Input Current

VNFB = VNFR

●

–45

– 30

–15

µA

Negative Feedback Reference Voltage

2.7V ≤ VIN ≤ 25V, VC = 0.8V

●

0.01

0.05

%/V

Line Regulation

Error Amplifier Transconductance

∆IC = ±25µA

1100

1500

1900

µmho

●

700

2300

µmho

Error Amplifier Source Current

VFB = VREF – 150mV, VC = 1.5V

●

120

200

350

µA

Error Amplifier Sink Current

VFB = VREF + 150mV, VC = 1.5V

●

1400

2400

µA

PACKAGE/ORDER I FOR ATIO

TJMAX = 125°C, θJA = 30°C/W, θJC = 4°C/W

R PACKAGE

7-LEAD PLASTIC DD

FRONT VIEW

TAB

GND

VIN

NFB

VSW

GND

S/S

ORDER PART

NUMBER

WITH PACKAGE SOLDERED TO 0.5 INCH2 COPPER

AREA OVER BACKSIDE GROUND PLANE OR INTERNAL

POWER PLANE. θJA CAN VARY FROM 20°C/W TO

>40°C/W DEPENDING ON MOUNTING TECHNIQUE

ORDER PART

NUMBER

T7 PACKAGE

7-LEAD TO-220

VIN

NFB

VSW

GND

S/S

FRONT VIEW

TAB

GND

TJMAX = 125°C, θJA = 50°C/W, θJC = 4°C/W

Consult factory for Military grade parts.

LT1370CR

LT1370HVCR

LT1370IR

LT1370HVIR

LT1370CT7

LT1370HVCT7

LT1370IT7

LT1370HVIT7

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