Datasheet LTC3875 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation |
| Pages / Page | 46 / 3 — ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING. PACKAGE … |
| File Format / Size | PDF / 997 Kb |
| Document Language | English |
ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING. PACKAGE DESCRIPTION. TEMPERATURE RANGE
Model Line for this Datasheet
Text Version of Document
LTC3875
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 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. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VIN Input Voltage Range 4.5 38 V VOUT Output Voltage Range SNSD+ Pin to VOUT 0.6 3.5 V SNSD+ Pin to GND 0.6 5 V V + OSNS1,2 Regulated VOUT Feedback Voltage (Note 4); ITH1,2 Voltage = 1.2V, –40°C to 85°C 0.597 0.600 0.603 V Including Diffamp Error (Note 4); ITH1,2 Voltage = 1.2V,–40°C to 125°C l 0.5965 0.600 0.6045 V I + OSNS1,2 Feedback Current (Note 4) –30 –100 nA 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 l 0.01 0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V l –0.01 –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 29 30 31 µA TSHDN Internal Thermal Shutdown (Note 8) 160 °C THYS Internal TS Hysteresis (Note 8) 10 °C
Fast Transient Functions
IFAST Fast Transient Program Current l 9 10 11 µA
Current Sensing Functions
I + SENSE(AC) AC Sense Pins Bias Current Each Channel; VSNSA (S) = 3.3V ±0.5 ±2 µA I + SENSE(DC) DC Sense Pins Bias Current Each Channel; VSNSD (S) = 3.3V l ±30 ±50 nA AVT(SNS) Total Sense Gain to Current Comp 5 V/V 3875fb For more information www.linear.com/LTC3875 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Related Parts
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 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. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VIN Input Voltage Range 4.5 38 V VOUT Output Voltage Range SNSD+ Pin to VOUT 0.6 3.5 V SNSD+ Pin to GND 0.6 5 V V + OSNS1,2 Regulated VOUT Feedback Voltage (Note 4); ITH1,2 Voltage = 1.2V, –40°C to 85°C 0.597 0.600 0.603 V Including Diffamp Error (Note 4); ITH1,2 Voltage = 1.2V,–40°C to 125°C l 0.5965 0.600 0.6045 V I + OSNS1,2 Feedback Current (Note 4) –30 –100 nA 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 l 0.01 0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V l –0.01 –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 29 30 31 µA TSHDN Internal Thermal Shutdown (Note 8) 160 °C THYS Internal TS Hysteresis (Note 8) 10 °C
Fast Transient Functions
IFAST Fast Transient Program Current l 9 10 11 µA
Current Sensing Functions
I + SENSE(AC) AC Sense Pins Bias Current Each Channel; VSNSA (S) = 3.3V ±0.5 ±2 µA I + SENSE(DC) DC Sense Pins Bias Current Each Channel; VSNSD (S) = 3.3V l ±30 ±50 nA AVT(SNS) Total Sense Gain to Current Comp 5 V/V 3875fb For more information www.linear.com/LTC3875 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Related Parts
