LT3436_15 datasheet(2/16 Pages) LINER

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LT3436

3436fa

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

Recommended Operating Voltage

●

325

Maximum Switch Current Limit

●

346

Oscillator Frequency

3.3V < VIN < 25V

●

640

800

960

kHz

Switch On Voltage Drop

ISW = 3A

●

330

550

VIN Undervoltage Lockout

(Note 3)

●

2.47

2.6

2.73

VIN Supply Current

ISW = 0A

●

1.3

VIN Supply Current/ISW

ISW = 3A

mA/A

Shutdown Supply Current

VSHDN = 0V, VIN = 25V, VSW = 25V

µA

●

µA

Feedback Voltage

3V < VIN < 25V, 0.4V < VC < 0.9V

1.182

1.2

1.218

●

1.176

1.224

FB Input Current

●

– 0.2

– 0.4

µA

FB to VC Voltage Gain

0.4V < VC < 0.9V

150

350

FB to VC Transconductance

∆IVC = ±10µA

●

500

850

1300

µMho

VC Pin Source Current

VFB = 1V

●

– 85

– 120

– 165

µA

VC Pin Sink Current

VFB = 1.4V

●

110

165

µA

VC Pin to Switch Current Transconductance

4.8

A/V

VC Pin Minimum Switching Threshold

Duty Cycle = 0%

0.3

VC Pin 3A ISW Threshold

0.9

Maximum Switch Duty Cycle

VC = 1.2V, ISW = 350mA

VC = 1.2V, ISW = 1A

●

SHDN Threshold Voltage

●

1.28

1.35

1.42

SHDN Input Current (Shutting Down)

SHDN = 60mV Above Threshold

●

–7

–10

–13

µA

SHDN Threshold Current Hysteresis

SHDN = 100mV Below Threshold

µA

SYNC Threshold Voltage

1.5

2.2

SYNC Input Frequency

1.4

MHz

SYNC Pin Resistance

ISYNC = 1mA

Ω

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER INFORMATION

Input Voltage .......................................................... 25V

Switch Voltage ......................................................... 35V

SHDN Pin ............................................................... 25V

FB Pin Current ....................................................... 1mA

SYNC Pin Current .................................................. 1mA

Operating Junction Temperature Range (Note 2)

LT3436E .......................................... – 40

°C to 125°C

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

°C to 150°C

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

°C

ORDER PART NUMBER

(Note 1)

TJMAX = 125°C, θJA = 45°C/W,

θJC(PAD) = 10°C/W

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

3436EFE

FE PART MARKING

LT3436EFE

The

● denotes the specifications which apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.8V, SHDN, SYNC and switch open unless otherwise noted.

FE PACKAGE

16-LEAD PLASTIC TSSOP

EXPOSED PAD IS GND (PIN 17),

MUST BE SOLDERED TO PCB

TOP VIEW

GND

VIN

GND

SYNC

SHDN

GND

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