LT1619 datasheet(2/20 Pages) LINER

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LT1619

1619fa

Input Voltage (VIN) ................................... – 0.3V to 20V

Gate Drive Supply Voltage (DRV) ............. – 0.3V to 20V

Shutdown/Synch Voltage (S/S) ................ – 0.3V to 20V

Feedback Voltage (FB) .............................................. VIN

Compensation Voltage (VC) ...................................... 3V

Gate Drive Output Current (GATE) ........................

±1.5A

Current Sense Voltage (SENSE) ................. – 0.5V to VIN

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

Junction Temperature (Note 3) ............................. 125

°C

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

°C to 150°C

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

°C

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

TJMAX = 125°C, θJA = 200°C/ W

TJMAX = 125°C, θJA = 120°C/ W

(Note 1)

ORDER PART

NUMBER

MS8 PART MARKING

LT1619EMS8

LTHC

S/S

GND

VIN

DRV

GATE

SENSE

TOP VIEW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

ORDER PART

NUMBER

S8 PART MARKING

LT1619ES8

1619

TOP VIEW

VIN

DRV

GATE

SENSE

S/S

GND

S8 PACKAGE

8-LEAD PLASTIC SO

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage

Measured at the FB Pin

1.22

1.24

1.26

Reference Line Regulation

1.9V

≤ VIN ≤ 18V

0.004

0.05

%/V

FB Input Bias Current

VFB = VREF

Error Amplifier Transconductance

170

260

µΩ–1

Error Amplifier Output Source Current

VFB = 1V, VCOMP = 1V

8.7

µA

Error Amplifier Output Sink Current

VFB = 1.5V, VCOMP = 1V

8.7

µA

Error Amplifier Clamp Voltage

VFB = 1V

1.6

2.2

Undervoltage Lockout Threshold

1.65

1.85

Input Voltage Range

1.9

Switching Frequency

1.9V

≤ VIN ≤ 18V

220

300

360

kHz

Synchronization Frequency Range

370

500

kHz

Maximum Duty Cycle

Current Limit Threshold

Burst Mode Operation Current Limit

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

VIN = VDRV = 2.5V, VS/S = VIN, COMP open, VSENSE = 0V unless otherwise noted.

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

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