LTC3543 datasheet(2/16 Pages) LINER

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LTC3543

3543f

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

RUN, VFB, MODE, CAP Voltages...................–0.3V to VIN

SW Voltage ....................................–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 = 3.6V unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RUN

Run Threshold

0.3

1.5

VFB

Regulated Feedback Voltage

(Note 4)

●

0.588

0.6

0.612

IVFB

Feedback Pin Current

µA

IPK

Peak Inductor Current

VIN = 3.6V, VFB = 0V

0.7

1.3

VLOADREG

Output Voltage Load Regulation

0.5

%/mA

VLINEREG

Output Voltage Line Regulation

(Note 4)

0.5

%/V

VIN

Input Voltage Range

●

2.5

5.5

Input DC Bias Current

Active Mode

Sleep Mode

Shutdown

(Note 5)

VOUT = 90%, ILOAD = 0A

VOUT = 103%, ILOAD = 0A

VRUN = 0V, VIN = 5.5V

375

0.1

500

µA

fOSC

Nominal Oscillator Frequency

●

1.80

2.25

MHz

RPFET

RDS(ON) of P-Channel FET

ISW = 100mA

0.45

RNFET

RDS(ON) of N-Channel FET

ISW = 100mA

0.35

ISW

SW Leakage

VRUN = 0V, VSW = 0V or 5.5V, VIN = 5.5V

±1

µA

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

TOP VIEW

DCB PACKAGE

6-LEAD (2mm

× 3mm) PLASTIC DFN

PIN 7 IS GND

TJMAX = 125°C, θJA = 64°C/W

ORDER PART NUMBER

DCB PART MARKING

LTC3543EDCB

LCCK

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.

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3543E is guaranteed to meet performance speciﬁcations

from 0°C to 85°C. Speciﬁcations over the –40°C to 85°C operating

temperature ranges are assured by design, characterization and correlation

with statistical process controls.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula: TJ = TA + (PD)(64°C/W)

Note 4: The LTC3543 is tested in a proprietary test mode that connects

VFB to the output of the error ampliﬁer. This test mode is equivalent to

continuous mode operation.

Note 5: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

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