LTC3869 datasheet(3/46 Pages) LINER

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LTC3875

3875fb

For more information www.linear.com/LTC3875

The l denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN1,2 = 5V unless otherwise noted.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3875EUH#PBF

LTC3875EUH#TRPBF

3875

40-Lead (5mm × 5mm) Plastic QFN

–40°C to 125°C

LTC3875IUH#PBF

LTC3875IUH#TRPBF

3875

40-Lead (5mm × 5mm) Plastic QFN

–40°C to 125°C

LTC3875EUJ#PBF

LTC3875EUJ#TRPBF

LTC3875

40-Lead (6mm × 6mm) Plastic QFN

–40°C to 125°C

LTC3875IUJ#PBF

LTC3875IUJ#TRPBF

LTC3875

40-Lead (6mm × 6mm) Plastic QFN

–40°C to 125°C

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

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/. Some packages are available in 500 unit reels through

designated sales channels with #TRMPBF suffix.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loops

VIN

Input Voltage Range

4.5

VOUT

Output Voltage Range

SNSD+ Pin to VOUT

SNSD+ Pin to GND

0.6

3.5

VOSNS1,2+

Regulated VOUT Feedback Voltage

Including Diffamp Error

(Note 4); ITH1,2 Voltage = 1.2V, –40°C to 85°C

(Note 4); ITH1,2 Voltage = 1.2V,–40°C to 125°C

0.597

0.5965

0.600

0.603

0.6045

IOSNS1,2+

Feedback Current

(Note 4)

–30

–100

VREFLNREG

Reference Voltage Line Regulation VIN = 4.5V to 38V (Note 4)

0.002 0.005

%/V

VLOADREG

Output Voltage Load Regulation

(Note 4)

Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V

Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V

0.01

–0.01

0.1

–0.1

gm1,2

Transconductance Amplifier gm

ITH1,2 = 1.2V; Sink/Source 5µA (Note 4)

2.2

mmho

Thermal Functions

ITCOMP1,2

Thermal Sensor Current

µA

TSHDN

Internal Thermal Shutdown

(Note 8)

160

°C

THYS

Internal TS Hysteresis

(Note 8)

°C

Fast Transient Functions

IFAST

Fast Transient Program Current

µA

Current Sensing Functions

ISENSE(AC)

AC Sense Pins Bias Current

Each Channel; VSNSA+(S) = 3.3V

±0.5

±2

µA

ISENSE(DC)

DC Sense Pins Bias Current

Each Channel; VSNSD+(S) = 3.3V

±30

±50

AVT(SNS)

Total Sense Gain to Current Comp

V/V

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