LT3462_15 datasheet(2/8 Pages) LINER

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LT3462/LT3462A

3462af

Input Voltage (VIN) .................................................. 16V

SW Voltage .............................................................. 40V

D Voltage ............................................................... –40V

SDREF, FB Voltage ................................................. 2.5V

Operating Ambient

Temperature Range (Note 3) ...............–40

°C to 85°C

Maximum Junction Temperature .......................... 125

°C

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

°C to 150°C

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

°C

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VIN = 3V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

Maximum Operating Voltage

SDREF Voltage

µA > ISDREF ≥ –80µA

1.245

1.265

1.285

FB Pin Bias Current (Note 2)

SDREF Minus FB Voltage

µA > ISDREF ≥ –80µA

1.235

1.263

1.285

Error Amp Offset Voltage

–12

SDREF Reference Source Current

SDREF >1.2V

120

180

µA

Supply Current

FB = –0.05V, Not Switching

2.9

3.6

SDREF = 0V, FB = Open, VIN = 5V

6.5

µA

SDREF Line Regulation

0.007

%/V

Switching Frequency (LT3462)

0.8

1.2

1.6

MHz

Switching Frequency (LT3462A)

2.0

2.7

3.5

MHz

Maximum Duty Cycle (LT3462)

Maximum Duty Cycle (LT3462A)

Switch Current Limit

300

420

Switch VCESAT

ISW = 250mA

270

350

Switch Leakage Current

VSW = 5V

0.01

µA

Rectifier Leakage Current

VD = –40V

0.03

µA

Rectifier Forward Drop

ISCHOTTKY = 250mA

800

1100

SDREF Voltage Low

0.20

SDREF Off-State Pull-Up Current

123

µA

SDREF Turn-Off Current

–300

–200

µA

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

ORDER PART

NUMBER

S6 PART MARKING

LTBBV

LTBGB

LT3462ES6

LT3462AES6

TJMAX = 125°C

θJA = 150°C ON BOARD OVER

GROUND PLANE

θJC = 120°C/W

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: Current flows out of the pin.

Note 3: The LT3462E is guaranteed to meet specifications from 0

°C to

°C. Specifications over the –40°C to 85°C operating temperature range

are assured by design, characterization and correlation with statistical

process controls.

6 VIN

5 D

4 SDREF

SW 1

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC TSOT-23

GND 2

FB 3

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