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LT3430

sn3430 3430is

(Note 1)

Input Voltage (VIN) ................................................. 60V

BOOST Pin Above SW ............................................ 35V

BOOST Pin Voltage ................................................. 68V

SYNC Voltage ........................................................... 7V

SHDN Voltage ........................................................... 6V

BIAS Pin Voltage .................................................... 30V

FB Pin Voltage/Current .................................. 3.5V/2mA

Operating Junction Temperature Range

LT3430EFE (Note 8) ......................... – 40

°C to 125°C

LT3430IFE (Note 8) ......................... – 40

°C to 125°C

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

°C to 150°C

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

°C

ORDER PART

NUMBER

LT3430EFE

LT3430IFE

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage (VREF)VOL + 0.2 ≤ VC ≤ VOH – 0.2

1.204

1.219

1.234

5.5V

≤ VIN ≤ 60V

1.195

1.243

FB Input Bias Current

– 0.2

– 1.5

µA

Error Amp Voltage Gain

(Note 2)

200

400

V/V

Error Amp gm

dl (VC) = ±10µA

1650

2200

3300

µMho

1000

4200

µMho

VC to Switch gm

3.4

A/V

EA Source Current

FB = 1V

125

225

450

µA

EA Sink Current

FB = 1.4V

100

225

500

µA

VC Switching Threshold

Duty Cycle = 0

0.9

VC High Clamp

SHDN = 1V

2.1

Switch Current Limit

VC Open, Boost = VIN + 5V, FB = 1V

–40

°C ≤ TJ ≤ 25°C

4.5

TJ = 125°C (Note 9)

2.5

3.5

Switch On Resistance

ISW = 3A, Boost = VIN + 5V (Note 7)

0.1

0.14

Ω

0.18

Ω

Maximum Switch Duty Cycle

FB = 1V

Switch Frequency

VC Set to Give DC = 50%

184

200

216

kHz

172

200

228

kHz

fSW Line Regulation

5.5V

≤ VIN ≤ 60V

0.05

0.15

%/V

fSW Shifting Threshold

Df = 10kHz

0.8

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

VIN = 15V, VC = 1.5V, SHDN = 1V, BOOST = Open Circuit, SW = Open Circuit, unless otherwise noted.

TJMAX = 125°C, θJA = 45°C/ W, θJC = 10°C/ W

EXPOSED PAD MUST BE SOLDERED

TO GROUND PLANE

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

FE PACKAGE

16-LEAD PLASTIC TSSOP

TOP VIEW

GND

VIN

BOOST

GND

SHDN

SYNC

BIAS

GND

Consult LTC Marketing for parts specified with wider operating temperature ranges.

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