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LTC3542EDC-1

500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter

Linear Technology 

LTC3542-1

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Input Supply Voltage (VIN) ........................... –0.3V to 6V

VOUT, RUN Voltages......................................–0.3V to VIN

MODE Voltage................................–0.3V to (VIN + 0.3V)

SW Voltage ....................................–0.3V to (VIN + 0.3V)

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

Junction Temperature (Note 7) ............................. 125°C

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

Reflow Peak Body Temperature ............................ 260°C

PIN CONFIGURATION

TOP VIEW

VOUT 1

6 RUN

VIN 2

7

5 MODE/SYNC

GND 3

4 SW

DC PACKAGE

6-LEAD (2mm s 2mm) PLASTIC DFN

TJMAX = 125°C, θJA = 89°C/W, θJC = 18°C/W

(SOLDERED TO A 4-LAYER BOARD, NOTE 3)

EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

LTC3542EDC-1#PBF

LTC3542EDC-1#TRPBF LDWC

6-Lead (2mm × 2mm) Plastic DFN

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/

TEMPERATURE RANGE

–40°C to 85°C

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 noted.

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VIN

RVOUT

VOUT

ΔVLINE_REG

ΔVLOAD_REG

IS

Operating Voltage Range

Input Resistance of VOUT Pin

Output Feedback Voltage (Note 4)

Reference Voltage Line Regulation (Note 4)

Output Voltage Load Regulation (Note 4)

Input DC Supply Current (Note 5)

Active Mode

Sleep Mode

Shutdown

VIN = 2.5V to 5.5V

ILOAD = 100mA to 500mA

VOUT = 2.5V

VOUT = 2.9V, MODE = 0V

RUN = 0V

l 2.5

5.5

V

504

840 1176

kΩ

l 2.744 2.8 2.856

V

0.04

0.2

%/V

0.02

0.2

%

300

500

μA

26

35

μA

0.1

1

μA

fOSC

fSYNC

ILIM

RDS(ON)

ISW(LKG)

Oscillator Frequency

Synchronous Frequency

Peak Switch Current

P-Channel On Resistance (Note 6)

N-Channel On Resistance (Note 6)

Switch Leakage Current

VOUT = 2.8V

l 1.8

2.25

2.7

MHz

VOUT = 2.8V

1

3

MHz

VIN = 3V, VOUT = 2.5V, Duty Cycle < 35%

650 1000

mA

ISW = 100mA

ISW = –100mA

0.5

0.65

Ω

0.35 0.55

Ω

VIN = 5V, VRUN = 0V, VSW = 0V or 5V

±0.01 ±1

μA

35421f

2

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