LTC3549 datasheet(2/16 Pages) LINER

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LTC3549

3549f

Input Supply Voltage................................... –0.3V to 6V

RUN, VFB, MODE Voltages .............–0.3V to (VIN + 0.3V)

SW Voltage < 100ns Pulse.............–0.3V to (VIN + 0.3V)

Operating Temperature Range (Note 2) ... –40°C to 85°C

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

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

(Note 1)

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C, VIN = 2.2V.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Voltage Range

●

1.6

5.5

VRUN

RUN Threshold

●

0.3

0.7

1.1

IRUN

RUN Leakage Current

VRUN = 0 or 2.2V

0.01

µA

VMODE

MODE Threshold

●

0.3

0.65

1.1

IMODE

MODE Leakage Current

VMODE = 0 or 2.2V

0.01

µA

VFB

Regulated Feedback Voltage

TA = 25°C (Note 4)

0°C ≤ TA ≤ 85°C (Note 4)

–40°C ≤ TA ≤ 85°C (Note 4)

●

0.599

0.597

0.596

0.611

0.623

0.626

IVFB

Feedback Current

●

±30

ΔVOVL

ΔVFBOVL Overvoltage Lockout

ΔVOVL = ΔVFBOVL – VFB (Note 6)

ΔVFB

Reference Voltage Line Regulation

1.6V < VIN < 5.5V (Note 4)

●

0.04

0.4

%/V

ΔVOUT

Output Voltage Line Regulation

IOUT = 100mA, 1.6V < VIN < 5.5V (Note 7)

0.04

0.4

%/V

IPK

Peak Inductor Current

VFB = 0.5V or VOUT = 90%

0.3

0.45

0.6

VLOADREG

Output Voltage Load Regulation

Pulse Skip Mode, VOUT = 1.2V,

50mA < ILOAD < 250mA (Note 7)

0.5

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

TOP VIEW

DCB PACKAGE

6-LEAD (2mm

× 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 64°C/W

EXPOSED PAD (PIN 7) IS GND

MUST BE SOLDERED TO PCB

ORDER PART NUMBER

DCB PART MARKING

LTC3549EDCB

LBZR

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.

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