LT3652HV ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junctiontemperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 20V, Boost – SW = 4V, SHDN = 2V, VFB = 3.3V, CTIMER = 0.68µF. SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS tTIMER Full Charge Cycle Timeout 3 hr Precondition Timeout 22.5 min Timer Accuracy l –10 10 % fO Operating Frequency 1 MHz DC Duty Cycle Range Continuous Operation l 15 90 % Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: VIN minimum voltages below the start threshold are only may cause permanent damage to the device. Exposure to any Absolute supported if (VBOOST-VSW) > 2V. Maximum Rating condition for extended periods may affect device Note 4: This parameter is valid for programmed output battery float reliability and lifetime. voltages ≤ 4.2V. VIN operating range minimum is 0.75V above the Note 2: The LT3652HV is tested under pulsed load conditions such that programmed output battery float voltage (VBAT(FLT) + 0.75V). VIN Start TJ ≅ TA. The LT3652HVE is guaranteed to meet performance specifications Voltage is 3.3V above the programmed output battery float voltage from 0°C to 85°C junction temperature. Specifications over the –40°C (VBAT(FLT) + 3.3V). to 125°C operating junction temperature range are assured by design, Note 5: Output battery float voltage (VBAT(FLT)) programming resistor characterization, and correlation with statistical process controls. The divider equivalent resistance = 250k compensates for input bias current. LT3652HVI specifications are guaranteed over the full –40°C to 125°C Note 6: All V operating junction temperature range. Note that the maximum ambient FB voltages measured through 250k series resistance. temperature consistent with these specifications is determined by specific Note 7: VSENSE(DC) is reduced by thermal foldback as junction temperature operating conditions in conjunction with board layout, the rated package approaches 125°C. thermal impedance and other environmental factors. 3652hvfb 4 For more information www.linear.com/LT3652HV Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
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