Datasheet LT3651-4.1, LT3651-4.2 (Analog Devices) - 4

LT3651-4.1/LT3651-4.2
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 temperature range. The junction temperature (TJ in °C) is calculated from may cause permanent damage to the device. Exposure to any Absolute the ambient temperature (TA in °C) and power dissipation (PD in Watts) Maximum Rating condition for extended periods may affect device according to the formula: reliability and lifetime. TJ = TA + PD • θJA
Note 2:
The LT3651 is tested under pulse loaded conditions such that where θJA (in °C/W) is the package thermal impedance. TJ = TA. The LT3651E is guaranteed to meet performance specifications
Note 3:
This IC includes overtemperature protection that is intended to from 0°C to 85°C junction temperature. Specifications over the –40°C protect the device during momentary overload conditions. The maximum to 125°C operating junction temperature range are assured by design, rated junction temperature will be exceeded when this protection is active. characterization and correlation with statistical process controls. The Continuous operation above the specified absolute maximum operating LT3651I is guaranteed over the full –40°C to 125°C operating junction junction temperature may impair device reliability or permanently damage the device. 365142ff 4 For more information www.linear.com/LT3651-4.1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts