Datasheet LTC3122 (Analog Devices) - 5

LTC3122
Typical perForMance characTerisTics PWM Mode Maximum Output Peak Current Limit Change PWM Operation No Load Input Current vs VIN vs Temperature Current vs VIN
2.0 2 70 V V 1.8 OUT = 5V OUT = 5V VOUT = 7.5V 1 60 VOUT = 7.5V 1.6 VOUT = 12V VOUT = 12V 1.4 50 0 1.2 40 1.0 –1 0.8 30 –2 OUTPUT CURRENT (A) 0.6 INPUT CURRENT (mA) 20 0.4 –3 10 0.2 0 PEAK CURRENT LIMIT CHANGE FROM 25°C (%) –4 0 0.5 1.5 2.5 3.5 4.5 5.5 –50 –10 30 70 110 150 0 1 2 3 4 5 6 VIN (V) TEMPERATURE (°C) VIN (V) 3122 G10 3122 G11 3122 G12
Burst Mode Maximum Output Burst Mode No Load Input Current Burst Mode Quiescent Current Current vs VIN vs VIN Change vs Temperature
350 10000 75 VOUT = 2.2V VOUT = 5V V V 300 OUT = 5V OUT = 7.5V VOUT = 7.5V VOUT = 12V 60 VOUT = 12V 250 1000 45 200 30 150 100 15 OUTPUT CURRENT (mA) 100 INPUT CURRENT (µA) 50 0 CHANGE IN CURRENT FROM 25°C (%) 0 10 –15 0.5 1.5 2.5 3.5 4.5 5.5 0.5 1.5 2.5 3.5 4.5 5.5 –50 –10 30 70 110 150 VIN, FALLING (V) VIN, FALLING (V) TEMPERATURE (°C) 3122 G13 3122 G14 3122 G14
SD Pin Threshold Frequency vs RT Frequency Accuracy
3.0 12 4 FREQUENCY VOUT = 15V PERIOD 3 VOUT = 3.6V 2.5 10 VOUT = 2.2V VOUT 2 5V/DIV 2.0 8 PERIOD (µs) 1 1.5 6 0 900mV 400mV –1 VSD FREQUENCY (MHz) 1.0 4 500mV/DIV –2 CHANGE IN FREQUENCY (%) 0.5 2 1s/DIV 3122 G16 –3 0 0 –4 0 100 200 300 400 500 600 0 1 2 3 4 5 6 RT (kΩ) VIN FALLING (V) 3122 G17 3122 G18 3122fa For more information www.linear.com/LTC3122 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 Typical Application Related Parts