LTC3726IGN datasheet(2/16 Pages) LINER

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LTC3726

3726fb

(Note 1)

VCC ........................................................... – 0.3V to 10V

SW ............................................................... –5V to 50V

ITH, RUN/SS ............................................... – 0.3V to 7V

All Other Pins ............................................ – 0.3V to 10V

Operating Ambient Temperature Range (Note 2)

LTC3726EGN ...................................... – 40

°C to 85°C

LTC3726IGN ....................................... – 40

°C to 85°C

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

°C

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

°C to 150°C

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

°C

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

The

● indicates specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 7V, GND = PGND = 0V, unless otherwise noted.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VFB

Regulated Feedback Voltage

(Note 4) ITH = 1.2V

●

0.594

0.600

0.606

∆VFB(LINREG)

Feedback Voltage Line Regulation

VCC = 5V to 10V, ITH = 1.2V

0.001

%/V

∆VFB(LOADREG)

Feedback Voltage Load Regulation

Measured in Servo Loop,

●

–0.01

–0.1

ITH = 0.5V to 2V

VISMAX

Maximum Current Sense Threshold

RSENSE Mode, VIS = 0V

CT Mode, VIS = 0V

1.15

1.28

1.4

VISOC

Over-Current Shutdown Threshold

RSENSE Mode, VIS = 0V

100

113

CT Mode, VIS = 0V

1.45

1.65

1.85

Transconductance Amplifier gm

2.40

2.75

3.10

IRUN/SS(C)

Soft-Start Charge Current

VRUN/SS = 2V

–4

–5

–6

µA

IRUN/SS(D)

Soft-Start Discharge Current

µA

VRUN/SS

RUN/SS Pin ON Threshold

VRUN/SS Rising

●

0.4

0.45

0.5

tON,MIN

Minimum ON Time

200

FG, SG RUP

FG, SG Driver Pull-Up On Resistance

FG, SG Low

1.5

2.3

Ω

FG, SG RDOWN

FG, SG Driver Pull-Down On Resistance

FG, SG High

1.5

2.3

Ω

PT+, PT– RUP

PT+, PT– Driver Pull-Up Resistance

PT+, PT– Low

1.5

2.3

Ω

PR+, PT– RDOWN PT+, PT– Driver Pull-Down Resistance

PT+, PT– High

1.5

2.3

Ω

∆VFB(OV)

Output Overvoltage Threshold

VFB Rising

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF

Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

GN PACKAGE

16-LEAD PLASTIC SSOP

TOP VIEW

MODE

FB/PHASE

ITH

RUN/SS

SLP

GND

VCC

PT+

PT–

PGND

IS+

IS–

FS/SYNC

TJMAX = 125°C, θJA = 130°C/W

ORDER PART NUMBER

LTC3726EGN

LTC3726IGN

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