LTC3125 datasheet(2/18 Pages) LINER

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LTC3125

3125fa

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN, VOUT Voltage ......................................... –0.3V to 6V

SW Voltage .................................................. –0.3V to 6V

SW Voltage < 100ns .................................... –0.3V to 7V

All Other Pins ............................................... –0.3V to 6V

Operating Junction Temperature Range

(Notes 2, 5)............................................ –40°C to 125°C

Junction Temperature ........................................... 125°C

Storage Temperature Range................... –65°C to 125°C

(Note 1)

TOP VIEW

VOUT

SHDN

GND

PROG

VIN

DCB PACKAGE

8-LEAD (2mm

3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 64°C/W (NOTE 6)

EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

1.8

5.5

Minimum Start-Up Voltage

1.6

1.8

Output Voltage Adjust Range

5.25

Feedback Voltage

1.176

1.200

1.229

Feedback Input Current

150

Quiescent Current—Shutdown

VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V

0.01

μA

Quiescent Current—Active

Measured on VOUT, Nonswitching

300

500

μA

Quiescent Current—Burst

VIN = VOUT = 3.3V, Measured on VIN, FB ≥ 1.230V,

Nonswitching

μA

N-Channel MOSFET Switch Leakage

VSW = 5V, VIN = 5V

0.1

μA

P-Channel MOSFET Switch Leakage

VSW = 5V, VOUT = 0V, VIN = 5V

0.1

μA

N-Channel MOSFET Switch On-Resistance

VOUT = 3.3V

0.125

P-Channel MOSFET Switch On-Resistance

VOUT = 3.3V

0.200

N-Channel MOSFET Current Limit

1.2

1.8

Current Limit Delay to Output

(Note 3)

Average Input Current Limit

RPROG = 44.2k

RPROG = 44.2k, (Note 4)

475

465

500

525

535

The

l denotes the speciﬁcations which apply over the full operating

junction temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 3.3V, VOUT = 4.5V unless otherwise noted (Note 2).

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3125EDCB#PBF

LTC3125EDCB#TRPBF

LDGY

8-Lead (2mm

× 3mm) Plastic DFN

–40°C to 125°C

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

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

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