LTC3446 datasheet(2/20 Pages) LINER

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LTC3446

3446fd

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN, LVIN to GND ......................................... – 0.3V to 6V

MODESEL, ENBUCK, ENLDO1,

ENLDO2 to GND.......................................... –0.3V to 6V

BUCKFB to GND .......................................... –0.3V to 6V

LVFB1, LVFB2 to GND.................................... –0.3V to 6V

ITH to GND ..... –0.3V to the Lesser of (VIN + 0.3V) or 3V

SW to GND......–0.3V to the Lesser of (VIN + 0.3V) or 6V

LVOUT1, LVOUT2

to GND .......... –0.3V to the Lesser of (LVIN + 0.3V) or 6V

PGOOD to GND ............................................ –0.3V to 6V

LVOUT1, LVOUT2 Short-Circuit

to GND Duration............................................... Indeﬁnite

Operating Temperature Range (Note 2)

LTC3446EDE ........................................ –40°C to 85°C

LTC3446IDE ....................................... –40°C to 125°C

Junction Temperature (Note 1) ........................... 125°C

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

(Note 1)

ENBUCK

BUCKFB

ENLDO1

LVFB1

LVFB2

ENLDO2

MODESEL

VIN

ITH

PGOOD

LVOUT1

LVIN

LVOUT2

TOP VIEW

DE PACKAGE

14-LEAD (4mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 35°C/W

EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3446EDE#PBF

LTC3446EDE#TRPBF

3446

14-Lead (4mm × 3mm) Plastic DFN

–40°C to 85°C

LTC3446IDE#PBF

LTC3446IDE#TRPBF

3446

14-Lead (4mm × 3mm) Plastic DFN

–40°C to 125°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges. *The temperature grade is identiﬁed by a label on the shipping container.

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/

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Voltage Range

(Note 3)

●

2.7

5.5

VUVLO

VIN Undervoltage Lockout Threshold

VIN Undervoltage Lockout Hysteresis

VIN Rising

●

2.37

2.5

VIN Quiescent Current (Note 4)

Buck Enabled Only, Not Sleeping

Buck Enabled Only, Sleeping

One LDO Enabled Only

All Three Outputs Enabled, Buck Not Sleeping

All Three Outputs Enabled, Buck Sleeping

Shutdown

VBUCKFB = 0V, ISW = 0mA

VBUCKFB = 1V, ISW = 0mA

VLVIN = 1.5V, 10μA LDO Output Load

VBUCKFB = 0V, ISW = 0mA, VLVIN = 1.5V,

10μA Output Load on Each LDO

VBUCKFB = 1V, ISW = 0mA, VLVIN = 1.5V,

10μA Load on Each LDO

VENBUCK = 0V, VENLDO1 = 0V, VENLDO2 = 0V

310

400

140

500

100

600

210

μA

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 3.6V unless otherwise speciﬁed. (Note 2)

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