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LTC3563

500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage

Linear Technology 

LTC3563

ABSOLUTE AXI U RATI GS

(Note 1)

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

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

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

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

Operating Ambient Temperature Range

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

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

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

Reflow Peak Body Temperature (DFN) .................. 260°C

PACKAGE/ORDER INFORMATION

TOP VIEW

VOUT 1

6 RUN

VIN 2

7

5 VSEL

GND 3

4 SW

DC PACKAGE

6-LEAD (2mm × 2mm) PLASTIC DFN

TJMAX = 125°C, θJA = 102°C/W, θJC = 20°C/W (SOLDERED TO A 4-LAYER BOARD, NOTE 3)

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

ORDER PART NUMBER DC PART MARKING

LTC3563EDC

LCSZ

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.

ELECTRICAL CHARACTERISTICS 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

VIN

VOUT

ΔVLINE_REG

ΔVLOAD_REG

IS

Operating Voltage Range

Output Voltage (Note 4)

VSEL = 0V

VSEL = High

Reference Voltage Line Regulation (Note 4) VIN = 2.5V to 5.5V

Output Voltage Load Regulation (Note 4) ILOAD = 100mA to 500mA

Input DC Supply Current (Note 5)

Active Mode

Sleep Mode

Shutdown

VOUT = 1.1V, VSEL = 0V

VOUT = 1.4V, VSEL = 0V

RUN = 0V

● 2.5

5.5

V

● 1.254 1.28 1.306

V

● 1.832 1.87 1.908

V

0.04

0.2

%/V

0.2

%

500

µA

26

35

µA

0.1

1

µA

fOSC

ILIM

RDS(ON)

ISW(LKG)

Oscillator Frequency

Peak Switch Current

P-Channel On Resistance (Note 6)

N-Channel On Resistance (Note 6)

Switch Leakage Current

● 1.8

2.25

2.7

MHz

VIN = 3V, VFB = 0.5V, Duty Cycle < 35%

ISW = 100mA

ISW = 100mA

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

650 1000 1750

mA

0.5

0.65

Ω

0.35 0.55

Ω

±0.01 ±1

µA

3563f

2

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