Datasheet LT3651-8.2, LT3651-8.4 (Analog Devices) - 4

LT3651-8.2/LT3651-8.4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 20V, SHDN = 2V, SENSE = BAT = VBAT(FLT), CTIMER = 0.68µF, RT = 50k, CLP = CLN = VIN, BOOST – SW = 4V. PARAMETER CONDITIONS MIN TYP MAX UNITS
TIMER Charge/Discharge Current 25 µA TIMER Disable Threshold l 0.1 0.25 V Full Charge Cycle Time-Out 3 Hour Precondition Timeout 22.5 Minute Timer Accuracy l –13 13 % Switcher Operating Frequency, fO RT = 50kΩ 1.1 MHz RT = 250kΩ 250 kHz Minimum SW On-Time, tON(MIN) 150 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This IC includes overtemperature protection that is intended to may cause permanent damage to the device. Exposure to any Absolute protect the device during momentary overload conditions. The maximum Maximum Rating condition for extended periods may affect device rated junction temperature will be exceeded when this protection is active. reliability and lifetime. Continuous operation above the specified absolute maximum operating
Note 2:
The LT3651-8.2/LT3651-8.4 are tested under pulse loaded junction temperature may impair device reliability or permanently damage conditions such that TJ = TA. The LT3651-8.2E/LT3651-8.4E are the device. guaranteed to meet performance specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LT3651-8.2I/LT3651-8.4I are guaranteed over the full –40°C to 125°C operating junction temperature range. The junction temperature (TJ in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD in Watts) according to the formula: TJ = TA + PD • θJA where θJA (in °C/W) is the package thermal impedance. 36518284fa 4 For more information www.linear.com/LT3651-8.2 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts