Datasheet LT3837 (Analog Devices) - 2

LT3837
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
V TOP VIEW CC to GND .. –0.3V to 22V UVLO, SYNC Pin Voltage ..–0.3V to VCC SG 1 16 PG SENSE–, SENSE+ Pin Voltage ..–0.5V, +0.5V VCC 2 15 PGDLY FB Pin Current ... ±2mA tON 3 14 RCMP V ENDLY 4 13 CCMP C Pin Current ... ±1mA 17 Operating Junction Temperature Range SYNC 5 12 SENSE+ (Notes 2, 3, 4) .. –40°C to 125°C SFST 6 11 SENSE– OSC 7 10 UVLO Storage Temperature Range ..–65°C to 150°C FB 8 9 V Lead Temperature (Soldering, 10 sec) ...300°C C FE PACKAGE 16-LEAD PLASTIC TSSOP TJMAX = 125°C, qJA = 40°C/W, qJC = 10°C/W EXPOSED PAD (PIN 17) IS GND,MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3837EFE#PBF LT3837EFE#TRPBF 3837EFE 16-Lead Plastic TSSOP –40°C to 125°C LT3837IFE#PBF LT3837IFE#TRPBF 3837FE 16-Lead Plastic TSSOP –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3837EFE LT3837EFE#TR 3837EFE 16-Lead Plastic TSSOP –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/
ELECTRICAL CHARACTERISTICS The
l
denotes specifications which apply over the full operating junction temperature range, otherwise specifications are TA = 25°C. VCC = 14V; PG, SG Open; VC = 1.4V, VSENSE = 0, RCMP = 1k, RTON = 90k, RPGDLY = 27.4k, RENDLY = 90k, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply
VCC Operating Range l 4.5 20 V VCC Supply Current (ICC) (Note 5) VC = Open l 4 6.4 10 mA VCC Shutdown Current VC = Open, VUVLO = OV l 50 150 µA
Feedback Amplifier
Feedback Regulation Voltage (VFB) l 1.220 1.237 1.251 V Feedback Pin Input Bias Current RCMP Open 200 nA Feedback Amplifier Transconductance ∆IC = ±10µA l 700 1000 1400 µmho Feedback Amplifier Source or Sink Current l 25 55 90 µA Feedback Amplifier Clamp Voltage VFB = 0.9 2.56 V VFB = 1.4 0.84 V Reference Voltage Line Regulation 12V ≤ VIN ≤ 18V l 0.005 0.05 %V 3837fd 2 Document Outline features applications description Typical Application absolute maximum ratings Pin Configuration order information electrical characteristics typical performance characteristics pin functions block diagram flyback feedback amplifier timing diagram operation applications information typical application Package description Revision History related parts