LTC3103 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operatingjunction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 10V unless otherwise noted.PARAMETERCONDITIONSMINTYPMAXUNITS Feedback Voltage (Note 5) l 0.588 0.6 0.612 V Feedback Voltage Line Regulation VIN = 2.5V to 15V (Note 5) 0.02 0.05 %/V Feedback Input Current (Note 5) l 1 20 nA Oscillator Frequency l 0.930 1.2 1.55 MHz TJ = 0°C to 85°C (Note 4) 1 1.2 1.45 MHz Quiescent Current, VIN—Active RUN = VIN, MODE = 0V, FB > 0.612 Nonswitching 600 µA Quiescent Current, VIN— Sleep RUN = VIN, FB > 0.612, MODE = VIN, TJ = 0°C to 85°C (Note 4) 1.8 2.6 µA RUN = VIN, FB > 0.612, MODE = VIN l 1.8 3.3 µA Quiescent Current, VIN—Shutdown RUN = 0V, TJ = 0°C to 85°C (Note 4) 1 1.7 µA RUN = 0V l 1.8 3.3 µA N-Channel MOSFET Synchronous Rectifier VIN = VSW = 15V, VRUN = 0V 0.01 0.3 µA Leakage Current N-Channel MOSFET Switch Leakage Current VIN = 15V, VSW = 0V, VRUN = 0V 0.01 0.3 µA N-Channel MOSFET Synchronous ISW = 200mA 0.85 Ω Rectifier RDS(ON) N-Channel MOSFET Switch RDS(ON) ISW = –200mA 0.65 Ω Peak Current Limit l 0.40 0.50 0.75 A PGOOD Threshold FB Falling, Percentage Below FB –14 –10 –5 % PGOOD Hysteresis Percentage of FB 2 % PGOOD Voltage Low IPGOOD = 100µA 0.2 V PGOOD Leakage Current VPGOOD = 5V 0.01 0.3 µA Maximum Duty Cycle l 89 92 % Switch Minimum Off Time (tOFF(MIN)) (Note 4) 65 ns Synchronous Rectifier Minimum On Time (Note 4) 70 ns (tON(MIN)) RUN Pin Threshold RUN Pin Rising l 0.76 0.80 0.85 V RUN Pin Hysteresis 0.06 V RUN Input Current RUN = 1.2V l 0.01 0.4 µA MODE Threshold l 0.5 0.8 1.2 V MODE Input Current MODE = 1.2V 0.1 4 µA Soft-Start Time VIN = 5V 0.7 1.4 2.5 ms Note 1: Stresses beyond those listed under Absolute Maximum Ratings where θJA is the package thermal impedance. Note the maximum ambient may cause permanent damage to the device. Exposure to any Absolute temperature consistent with these specifications is determined by specific Maximum Rating condition for extended periods may affect device operating conditions in conjunction with board layout, the rated package reliability and lifetime. thermal resistance and other environmental factors. Note 2: The LTC3103 is tested under pulsed load conditions such that Note 3: This IC includes overtemperature protection that is intended to TJ ≈ TA. The LTC3103E is guaranteed to meet specifications from protect the device during momentary overload conditions. The maximum 0°C to 85°C junction temperature. Specifications over the –40°C to rated junction temperature will be exceeded when this protection is active. 125°C operating junction temperature range are assured by design, Continuous operation above the specified absolute maximum operating characterization and correlation with statistical process controls. The junction temperature may impair device reliability or permanently damage LTC3103I is guaranteed over the full –40°C to 125°C operating junction the device. temperature range. The junction temperature (TJ) is calculated from the Note 4: Specification is guaranteed by design. ambient temperature (TA) and power dissipation (PD) according to the Note 5: The LTC3103 has a proprietary test mode that allows testing in a formula: feedback loop which servos VFB to the balance point for the error amplifier. TJ = TA + (PD)(θJA°C/W) 3103fa For more information www.linear.com/LTC3103 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
