Datasheet LT3990, LT3990-3.3, LT3990-5 (Analog Devices) - 6

LT3990/LT3990-3.3/LT3990-5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum Input Voltage, Minimum Input Voltage, VOUT = 3.3V VOUT = 5V Boost Diode Forward Voltage
5.0 6.5 1.2 FRONT PAGE APPLICATION FRONT PAGE APPLICATION VOUT = 3.3V f = 600kHz 4.5 6.0 1.0 TO START TO START (V) F 0.8 4.0 TO RUN 5.5 TO RUN 0.6 3.5 5.0 INPUT VOLTAGE (V) INPUT VOLTAGE (V) BOOST DIODE V 0.4 3.0 4.5 –50°C 0.2 25°C 125°C 150°C 2.5 4.0 0 0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350 0 50 100 150 200 LOAD CURRENT (mA) LOAD CURRENT (mA) BOOST DIODE CURRENT (mA) 3990 G19 3990 G20 3990 G21
Catch Diode Forward Voltage Catch Diode Leakage Power Good Threshold
1.0 15 92 VR = 12V 0.8 12 91 (V) F 8 0.6 90 0.4 6 TCH DIODE, V THRESHOLD (%) CA –50°C 89 0.2 CATCH DIODE LEAKAGE (µA) 25°C 3 125°C 150°C 0 0 88 0 100 200 300 400 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 CATCH DIODE CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 3990 G22 3990 G23 3990 G24
Transient Load Response; Load Transient Load Response; Load Current is Stepped from 10mA Current is Stepped from 100mA EN/UVLO Threshold (Burst Mode Operation) to 110mA to 200mA
1.240 VOUT VOUT 1.215 100mV/DIV 100mV/DIV IL IL 1.190 100mA/DIV 100mA/DIV 100µs/DIV 3990 G26 100µs/DIV 3990 G27 THRESHOLD VOLTAGE (V) 1.165 FRONT PAGE APPLICATION FRONT PAGE APPLICATION VIN = 12V VIN = 12V VOUT = 5V VOUT = 5V 1.140–50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3990 G25 3990fa 6 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 Typical Application Related Parts