Datasheet LTC3807 (Analog Devices) - 3

LTC3807
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3807HFE#PBF LTC3807HFE#TRPBF LTC3807FE 20-Lead Plastic TSSOP –40°C to 150°C LTC3807MPFE#PBF LTC3807MPFE#TRPBF LTC3807FE 20-Lead Plastic TSSOP –55°C to 150°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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 the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, VRUN = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Operating Voltage Range 4 38 V VOUT Regulated Output Voltage Range 0.8 24 V VFB Regulated Feedback Voltage (Note 4); ITH Voltage = 1.2V –40°C to 85°C 0.792 0.800 0.808 V LTC3807E, LTC3807I l 0.788 0.800 0.812 V LTC3807H, LTC3807MP l 0.786 0.800 0.812 V IFB Feedback Current (Note 4) ±5 ±50 nA Reference Voltage Line Regulation (Note 4); VIN = 4.5V to 38V 0.002 0.02 %/V Output Voltage Load Regulation (Note 4) l 0.01 0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V (Note 4) l –0.01 –0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2V gm Transconductance Amplifier gm (Note 4); ITH = 1.2V; Sink/Source 5µA 2 mmho IQ Input DC Supply Current (Note 5) Pulse Skip or Forced Continuous Mode VFB = 0.83V (No Load) 2 mA Sleep Mode VFB = 0.83V (No Load) 50 75 µA Shutdown RUN = 0V 14 25 µA UVLO Undervoltage Lockout INTVCC Ramping Up l 3.92 4.2 V INTVCC Ramping Down l 3.6 3.80 4.0 V Feedback Overvoltage Protection Measured at VFB Relative to Regulated VFB 7 10 13 % SENSE+ Pin Current ±1 µA SENSE– Pins Current V – SENSE < INTVCC – 0.5V ±2 µA V – SENSE > INTVCC + 0.5V 700 µA Maximum Duty Factor In Dropout 98 99 % Soft-Start Charge Current VTRACK = 0V 7 10 14 µA VRUN On RUN Pin On Threshold VRUN Rising l 1.15 1.21 1.27 V VRUN Hyst RUN Pin Hysteresis 50 mV V – SENSE(MAX) Maximum Current Sense Threshold VFB = 0.7V, VSENSE = 3.3V, ILIM = 0 l 22 30 36 mV V – FB = 0.7V, VSENSE = 3.3V, ILIM = INTVCC l 43 50 57 mV V – FB = 0.7V, VSENSE = 3.3V, ILIM = FLOAT l 64 75 85 mV 3807fa For more information www.linear.com/LTC3807 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Related Parts