LTC3418 Просмотр технического описания (PDF) - Linear Technology

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LTC3418

8A, 4MHz, Monolithic Synchronous Step-Down Regulator

Linear Technology 

LTC3418

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Input Supply Voltage................................... –0.3V to 6V

ITH, RUN/SS, VFB Voltages ......................... –0.3V to VIN

SYNC/MODE Voltages................................ –0.3V to VIN

TRACK Voltage........................................... –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 5) ............................. 125°C

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

PIN CONFIGURATION

TOP VIEW

SW 1

SW 2

PVIN 3

PVIN 4

PGOOD 5

RT 6

RUN/SS 7

SGND 8

PVIN 9

PVIN 10

SW 11

SW 12

38 37 36 35 34 33 32

39

13 14 15 16 17 18 19

31 SW

30 SW

29 PVIN

28 PVIN

27 SYNC/MODE

26 ITH

25 VFB

24 SVIN

23 PVIN

22 PVIN

21 SW

20 SW

UHF PACKAGE

38-LEAD (7mm × 5mm) PLASTIC QFN

TJMAX = 125°C, θJA = 34°C/W, θJC = 1°C/W

EXPOSED PAD (PIN 39) IS PGND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

LTC3418EUHF#PBF

LTC3418EUHF#TRPBF 3418

38-Lead (7mm × 5mm) 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 85°C

ELECTRICAL CHARACTERISTICS The l indicates specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX

VIN

Input Voltage Range

2.25

5.5

VFB

Regulated Feedback Voltage

0°C ≤ TA ≤ 85°C

(Note 3)

0.792 0.800 0.808

l 0.784 0.800 0.816

IFB

Feedback Input Current

100 200

ΔVFB

Reference Voltage Line Regulation

VIN = 2.5V to 5.5V (Note 3)

0.04 0.2

VLOADREG

VTRACK

Output Voltage Load Regulation

Tracking Voltage Offset

Measured in Servo Loop, VITH = 0.36V l

Measured in Servo Loop, VITH = 0.84V l

VTRACK = 0.4V

0.02 0.2

–0.02 –0.2

15

Tracking Voltage Range

0

0.8

UNITS

V

V

V

nA

%/V

%

%

mV

V

3418fb

2

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