Datasheet LT3971, LT3971-3.3, LT3971-5 (Analog Devices) - 5

LT3971/LT3971-3.3/LT3971-5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. LT3971 Feedback Voltage LT3971-3.3 Output Voltage LT3971-5 Output Voltage
1.205 3.345 5.06 1.200 3.330 5.04 1.195 3.315 5.02 TAGE (V) TAGE (V) TAGE (V) 1.190 3.300 5.00 1.185 3.285 4.98 FEEDBACK VOL OUTPUT VOL OUTPUT VOL 1.180 3.270 4.96 1.175 3.255 4.94 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3971 G07 3971 G28 3971 G29
Maximum Load Current Maximum Load Current Load Regulation
3.0 2.5 0.30 VOUT = 3.3V VOUT = 5V 0.25 2.5 0.20 2.0 TYPICAL 0.15 TYPICAL 2.0 0.10 1.5 TION (%) 0.05 MINIMUM MINIMUM 1.5 0 –0.05 1.0 1.0 –0.10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD REGULA –0.15 0.5 0.5 –0.20 –0.25 REFERENCED FROM V 0 0 –0.30 OUT AT 0.5A LOAD 5 10 15 20 25 30 35 40 5 10 15 20 25 30 35 40 0 200 400 600 800 1000 1200 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA) 3971 G08 3971 G09 3971 G10
Switching Frequency Switch Current Limit Switch Current Limit
1000 3.0 2.5 950 2.4 2.5 2.3 900 2.2 2.0 850 2.1 800 1.5 2.0 750 1.9 FREQUENCY (kHz) 1.0 1.8 700 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 1.7 0.5 650 1.6 DUTY CYCLE = 30% 600 0 1.5 –55 –25 5 35 65 95 125 155 0 20 40 60 80 100 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) DUTY CYCLE (%) TEMPERATURE (°C) 3971 G11 3971 G12 3971 G13 3971fd 5 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