LT3742EUF-TRPBF 查看數據表（PDF） - Linear Technology

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LT3742EUF-TRPBF

Dual, 2-Phase Step-Down Switching Controller

Linear Technology 

LT3742

Absolute Maximum Ratings

(Note 1)

VIN Voltage.................................................................30V

UVLO Voltage.............................................................30V

PG1, PG2 Voltage.......................................................30V

SWB, BIAS Voltage....................................................40V

SENSE1+, SENSE2+ Voltage.......................................30V

SENSE1–, SENSE2– Voltage.......................................30V

RUN/SS1, RUN/SS2 Voltage........................................6V

FB1, FB2 Voltage..........................................................6V

VC1, VC2 Voltage...........................................................6V

Junction Temperature............................................ 125°C

Operating Junction Temperature Range

(Note 2)................................................... –40°C to 125°C

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

pIN CONFIGURATION

TOP VIEW

G1 1

VIN 2

UVLO 3

BIAS 4

SWB 5

G2 6

24 23 22 21 20 19

18 VC1

17 PG1

16 RUN/SS1

25

15 RUN/SS2

14 PG2

13 VC2

7 8 9 10 11 12

UF PACKAGE

24-LEAD (4mm × 4mm) PLASTIC QFN

TJMAX = 125°C, θJA = 36°C/W

EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB

order information

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

LT3742EUF#PBF

LT3742EUF#TRPBF

3742

24-Lead (4mm × 4mm) Plastic QFN

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 125°C (Note 2)

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 5V unless otherwise specified.

PARAMETER

CONDITIONS

MIN TYP MAX

Minimum Operating Input Voltage

Quiescent Current

Shutdown Current

VUVLO = 1.5V

l

VRUN/SS1 = VRUN/SS2 = VFB1 = VFB2 = 1V

VRUN/SS1 = VRUN/SS2 = 0V

3.5

4.0

5.0

7.0

20

35

UVLO Pin Threshold

UVLO Pin Voltage Rising

l 1.20 1.25 1.28

UVLO Pin Hysteresis Current

RUN/SS Pin Threshold

VUVLO = 1V, Current Flows Into Pin

1.8

3

4

0.2

0.5

RUN/SS Pin Charge Current

VRUN/SS = 0V

0.5

1

1.5

FB Pin Voltage

l 0.788 0.800 0.812

FB Pin Voltage Line Regulation

VIN = 5V to 30V

0.01

UNITS

V

mA

µA

V

µA

V

µA

V

%/V

3742fa

2

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