link to page 2 LT8604 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. PARAMETERCONDITIONSMINTYPMAXUNITS Minimum Input Voltage l 2.9 3.2 V VIN Quiescent Current VEN/UV = 0V 1 4 µA VEN/UV = 2V, Not Switching l 1.7 12 µA VIN Current in Regulation VIN = 12V, VOUT = 3.3V, ILOAD = 100µA 56 µA VIN = 12V, VOUT = 3.3V, ILOAD = 1mA 400 µA Feedback Reference Voltage l 0.762 0.778 0.798 V FB Voltage Line Regulation VIN = 4V to 42V l ±0.002 ±0.04 %/V FB Pin Input Current VFB = 0.8V l ±20 nA BIAS Pin Current Consumption VBIAS = 3.3V, ILOAD = 30mA, 700kHz 0.9 mA Minimum On-Time l 35 65 ns Minimum Off-Time 90 120 ns Oscillator Frequency RT = 221k l 140 200 260 kHz RT = 18.2k l 1.85 2.00 2.15 MHz Top Power NMOS On-Resistance 3.2 Ω Top Power NMOS Current Limit l 185 230 275 mA Bottom Power NMOS On-Resistance 1.2 Ω SW Leakage Current VIN = 24V l 15 µA EN/UV Pin Threshold Pin Voltage Rising l 0.98 1.04 1.11 V V EN/UV Pin Hysteresis 40 mV EN/UV Pin Current VEN/UV = 2V ±20 nA PG Upper Threshold Offset from VFB/OUT VFB/OUT Rising l 5.0 7.5 10.0 % PG Lower Threshold Offset from VFB/OUT VFB/OUT Falling l –5.0 –7.5 –10.0 % PG Hysteresis 0.5 % PG Leakage VPG = 42V l ±200 nA PG Pull-Down Resistance VPG = 0.1V 550 1200 Ω TR/SS Source Current VTR/SS = 0.1V l 1 2 3.5 µA TR/SS Pull-Down Resistance Fault Condition, VTR/SS = 0.1V 300 900 Ω Note 1: Stresses beyond those listed under Absolute Maximum Ratings temperature range. The LT8604J is guaranteed over the full –40°C to may cause permanent damage to the device. Exposure to any Absolute 150°C operating junction temperature range. High junction temperatures Maximum Rating condition for extended periods may affect device degrade operating lifetimes. Operating lifetime is derated at junction reliability and lifetime. temperatures greater than 125°C. Note 2: The LT8604E is guaranteed to meet performance specifications Note 3: This IC includes overtemperature protection that is intended to from 0°C to 125°C junction temperature. Specifications over the –40°C protect the device during overload conditions. Junction temperature will to 125°C operating junction temperature range are assured by design, exceed 150°C when overtemperature protection is active. Continuous characterization and correlation with statistical process controls. The operation above the specified maximum operating junction temperature LT8604I is guaranteed over the full –40°C to 125°C operating junction will reduce lifetime Rev. 0 For more information www.analog.com 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
