Datasheet LT3686 (Analog Devices) - 3

LT3686
electricAl chArActeristics The
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denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VEN/UVLO ≥ 1.32V. PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current at Shutdown VEN/UVLO < 0.4V 0.1 1 µA VEN/UVLO = 1V 10 15 µA Quiescent Current Not Switching, MODE ≤ 0.4V 1.1 1.3 mA Not Switching, MODE ≥ 0.8V 1.2 1.4 mA Internal Undervoltage Lockout 3.4 3.6 V Overvoltage Lockout l 37 38 39 V Feedback Voltage 0.790 0.8 0.810 V l 0.785 0.8 0.815 V Feedback Voltage Line Regulation VIN = 3.6V ↔ 37V 0.0012 %/V FB Pin Bias Current 20 100 nA Switching Frequency IDA < 1.2A 0.3 2.5 MHz RT = 15.4kΩ 1.9 2.1 2.3 MHz RT = 100kΩ 670 kHz RT = 267kΩ 300 kHz Minimum On Time 100 110 ns Minimum Off Time 150 200 ns Switch VCESAT ISW = 1.2A 680 mV Switch Current Limit (Note 3) 1.9 2.3 2.6 A l 1.85 2.3 2.65 A Switch Active Current SW = 10V (Note 4) 400 600 µA SW = 0V (Note 5) 20 30 µA BOOST Pin Current ISW = 1.2A 20 mA Minimum Boost Voltage Above Switch ISW = 1.2A 2.2 2.4 V Max BD Pin Active Load Current MODE > 0.8V, BD < 5.2V 30 40 mA BD Pin Active Load Disable Threshold l 5.2 6.5 V DA Pin Current to Stop OSC l 1.2 1.7 A MODE High l 0.8 V MODE Low l 0.4 V MODE Pin Bias Current 0.1 µA SS Threshold 0.9 V SS Source Current VSS = 1V 1.3 2 2.7 µA EN/UVLO Bias Current VEN/UVLO = 10V 40 µA VEN/UVLO = 0V 1 µA EN/UVLO Threshold to Turn Off l 1.22 1.27 1.32 V EN/UVLO Hysteresis Current 1.8 2.4 3 µA Boost Diode Forward Drop IBD to IBOOST = 200mA 0.85 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Current limit guaranteed by design and/or correlation to static test. may cause permanent damage to the device. Exposure to any Absolute Slope compensation reduces current limit at higher duty cycle. Maximum Rating condition for extended periods may affect device
Note 4:
Current flows into pin. reliability and lifetime.
Note 5:
Current flows out of pin.
Note 2:
The LT3686E is guaranteed to meet performance specifications
Note 6:
This IC includes overtemperature protection that is intended from 0°C to 125°C junction temperature. Specifications over the –40°C to protect the device during momentary overload conditions. Junction to 125°C operating junction temperature range are assured by design, temperature will exceed the maximum operating junction temperature characterization and correlation with statistical process controls. The when overtemperature protection is active. Continuous operation above LT3686I is guaranteed over the full –40°C to 125°C operating junction the specified maximum operating junction temperature may impair device temperature range. The LT3686H is guaranteed over the full –40°C to reliability. See High Temperature Consideration section. Also see Operation 150°C operating junction temperature range. section. 3686fc 3 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 Package Description Revision History Related Parts