Datasheet LTC3896 (Analog Devices) - 3

LTC3896
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 with respect to GND, EXTVCC = 0V, V – DRVSET = 0V, VPRG = FLOAT unless otherwise noted. All pin voltages with respect to VOUT , unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V – IN Input Supply Operating Voltage Range (Note 10) DRVUV = VOUT 4 140 V (V – IN + |VOUT |) V – – OUT Regulated Output Voltage Set Point VIN + |VOUT | ≤ 140V –60 –0.8 V VFB Regulated Feedback Voltage (Note 4); ITH Voltage = 1.2V 0°C to 85°C, VPRG = FLOAT 0.792 0.800 0.808 V VPRG = FLOAT l 0.788 0.800 0.812 V VPRG = V – OUT l 3.220 3.300 3.380 V VPRG = INTVCC l 4.875 5.000 5.125 V IFB Feedback Current (Note 4) VPRG = FLOAT –0.006 ±0.050 µA VPRG = V – OUT or INTVCC 4 6 µA Reference Voltage Line Regulation (Note 4) VIN = 4.5V to 150V 0.002 0.02 %/V Output Voltage Load Regulation (Note 4) Measured in Servo Loop, l 0.01 0.1 % ∆ITH Voltage = 1.2V to 0.7V (Note 4) Measured in Servo Loop, ∆ITH l –0.01 –0.1 % Voltage = 1.2V to 1.6V gm Transconductance Amplifier gm (Note 4) ITH = 1.2V, Sink/Source 5µA 2.2 mmho I – Q Input DC Supply Current (Note 5) VDRVSET = VOUT Pulse-Skipping or Forced Continuous Mode VFB = 0.83V (No Load) 2.5 mA Sleep Mode VFB = 0.83V (No Load) 40 55 µA Shutdown RUN = 0V with Respect to GND 10 20 µA UVLO Undervoltage Lockout DRVCC Ramping Up DRVUV = V – OUT l 4.0 4.2 V DRVUV = INTVCC, DRVSET = INTVCC l 7.5 7.8 V DRVCC Ramping Down DRVUV = V – OUT l 3.6 3.8 4.0 V DRVUV = INTVCC, DRVSET = INTVCC l 6.4 6.7 7.0 V VRUN ON RUN Pin ON Threshold VRUN Rising with Respect to GND l 1.1 1.2 1.3 V VRUN Hyst RUN Pin Hysteresis 80 mV OVLO Overvoltage Lockout Threshold V – OVLO Rising with Respect to VOUT l 1.1 1.2 1.3 V OVLO Hyst OVLO Hysteresis 100 mV OVLO Delay 1 µs Feedback Overvoltage Protection Measured at VFB, Relative to Regulated VFB 7 10 13 % I + SENSE SENSE+ Pin Current ±1 µA I – SENSE SENSE– Pin Current SENSE– < VINTVCC – 0.5V ±1 µA SENSE– > VINTVCC + 0.5V 850 µA Maximum Duty Factor FREQ = V – OUT 98 99 % ISS Soft-Start Charge Current VSS = 0V 8 10 12 µA V – SENSE(MAX) Maximum Current Sense Threshold VFB = 0.7V, VSENSE = 3.3V ILIM = FLOAT l 66 75 84 mV ILIM = V – OUT l 43 50 57 mV ILIM = INTVCC l 90 100 109 mV
Gate Driver
TG Pull-Up On-Resistance VDRVSET = INTVCC 2.2 Ω TG Pull-Down On-Resistance 1.0 Ω 3896f For more information www.linear.com/LTC3896 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts