LTC3521 datasheet(2/20 Pages) LINER

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LTC3521

3521f

pin conFiGuraTion

elecTrical characTerisTics

absoluTe MaxiMuM raTinGs

PVIN1, PVIN2 Voltage .................................... –0.3V to 6V

SW1A, SW1B, SW2, SW3 Voltage

DC............................................................ –0.3V to 6V

Pulsed < 100ns........................................... –1V to 7V

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

(Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage

1.8

5.5

Quiescent Current—Shutdown

VSHDN1 = VSHDN2 = VSHDN3 = 0V

0.01

µA

Burst Mode Quiescent Current

VFB1 = 0.66V, VFB2 = 0.66V, VFB3 = 0.66V, VPWM = 0V

µA

The l denotes the specifications which apply over the full operating

junction temperature range, otherwise specifications are at TJ = 25°C. VIN = 3.6V, VOUT1 = 3.3V, unless otherwise noted.

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3521EUF#PBF

LTC3521EUF#TRPBF

3521

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 85°C

LTC3521EFE#PBF

LTC3521EFE#TRPBF

LTC3521FE

20-Lead Plastic TSSOP

–40°C to 85°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/

orDer inForMaTion

Operating Junction Temperature Range

(Note 2).................................................... –40°C to 85°C

Maximum Junction Temperature (Note 5)............. 125°C

Storage Temperature Range................... –65°C to 150°C

FE PACKAGE

20-LEAD PLASTIC TSSOP

TOP VIEW

FB3

FB2

SHDN2

PGOOD3

PGOOD2

PGOOD1

VIN

GND

PWM

FB1

PVIN2

SW2

PGND2

SW3

VOUT1

SW1A

SW1B

PVIN1

SHDN1

SHDN3

GND

TJMAX = 150°C, θJA = 40°C/W (NOTE 4)

UNDERSIDE METAL INTERNALLY CONNECTED TO V– (PCB CONNECTION OPTIONAL)

EXPOSED PAD (PIN 21) IS GND AND MUST BE SOLDERED TO PCB GROUND

24 23 22 21 20 19

TOP VIEW

GND

UF PACKAGE

24-LEAD (4mm 4mm) PLASTIC QFN

10 11 12

SHDN2

PGOOD3

PGOOD2

PGOOD1

VIN

GND

PGND2

SW3

VOUT1

SW1A

SW1B

TJMAX = 125°C, θJA = 37°C/W

EXPOSED PAD (PIN 25) IS GND AND MUST BE SOLDERED TO PCB GROUND

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