LTC3425 datasheet(2/24 Pages) LINER

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LTC3425

3425f

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Start-Up Voltage

VOUT = 0V, ILOAD < 1mA

0.88

Minimum Operating Voltage

(Note 3)

0.5

Output Voltage Adjust Range

2.4

5.25

Feedback Regulation Voltage

1.196

1.220

1.244

Feedback Input Current

150

VOUT Quiescent Current—Burst Mode Operation

BURST = 0V, REFEN = 0V, FB = 1.3V (Note 2)

µA

BURST = 0V, REFEN = 2V, FB = 1.3V (Note 2)

µA

VIN Quiescent Current—Shutdown

SHDN = 0V, VOUT = 0V, Not Including Switch Leakage

0.1

µA

VOUT Quiescent Current—Active

VC = 0V, Nonswitching (Note 2)

1.8

NMOS Switch Leakage

VSW = 5V

0.1

µA

PMOS Switch Leakage

VSW = 5V, VOUT = 0V

0.1

µA

NMOS Switch On Resistance

(Note 4)

0.04

Ω

PMOS Switch On Resistance

(Note 4)

0.05

Ω

NMOS Current Limit

ILIM Resistor = 75k (Note 4)

5.0

7.0

ILIM Resistor = 200k (Note 4)

1.8

2.7

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

SWA-D Voltages .......................................... – 0.3V to 6V

VOUTA-D, VOUTS Voltages............................ – 0.3V to 6V

BURST, SHDN, SS, REFEN, SYNCOUT, PGOOD,

REFOUT, CCM, SYNCIN Voltages ............... – 0.3V to 6V

Operating Ambient Temperature Range

(Note 5) .............................................. – 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 125°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ORDER PART

NUMBER

Consult LTC Marketing for parts specified with wider operating temperature ranges.

LTC3425EUH

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

TJMAX = 125°C, θJA = 40°C/W 1 LAYER BOARD,

θJA = 35°C/W 4 LAYER BOARD, θJC = 1.1°C/W

EXPOSED PAD IS GND (PIN 33) MUST BE SOLDERED TO PCB

32 31 30 29 28 27 26 25

10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm

× 5mm) PLASTIC QFN

13 14 15 16

GNDA

SWA

VOUTA

VOUTB

SWB

GNDB

GNDD

SWD

VOUTD

VOUTC

SWC

GNDC

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V, RT = 15k, unless otherwise noted.

UH PART

MARKING

3425

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