Datasheet LTC3129-1 (Analog Devices) - 7

LTC3129-1
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Burst Mode Threshold Output Voltage vs Temperature vs VIN and VOUT Switch RDS(ON) vs Temperature (Normalized to 25°C)
80 1.3 1.0 VCC = 2.5V 1.2 V 70 CC = 3V VCC = 4V 1.1 VCC = 5V 60 0.5 1.0 (%) 50 (Ω) 0.9 OUT 40 0 0.8 LOAD (mA) VOUT = 2.5V R DS(ON) 30 VOUT = 3.3V 0.7 VOUT = 4.1V CHANGE IN V 20 VOUT = 5V 0.6 –0.5 VOUT = 6.9V 10 VOUT = 8.2V 0.5 VOUT = 12V V 0 OUT = 15V 0.4 –1.0 2 4 6 8 10 12 14 16 –45 –20 5 30 55 80 105 130 –45 –20 5 30 55 80 105 130 V TEMPERATURE (°C) TEMPERATURE (°C) IN (V) 3129 G13 31291 G14 31291 G15
Accurate RUN Threshold Average Input Current Limit Maximum Output vs Temperature vs Temperature (Normalized to 25°C) vs MPPC Voltage (Normalized to 25°C)
2 100 15 90 80 10 1 70 5 60 0 50 0 40 30 –5 –1 AGE OF FULL INPUT CURRENT (%) 20 CHANGE IN RUN THRESHOLD (%) –10 10 PERCENT –2 0 CHANGE IN MAXIMUM OUTPUT CURRENT (%) –15 –45 –20 5 30 55 80 105 130 1.13 1.135 1.14 1.145 1.15 1.155 1.16 1.165 1.17 –45 –20 5 30 55 80 105 130 TEMPERATURE (°C) MPPC PIN VOLTAGE (V) TEMPERATURE (°C) 31291 G17 31291 G18 31291 G19
VCC Dropout Voltage vs Temperature VCC Dropout Voltage vs VIN Fixed Frequency PWM (PWM Mode, Switching) (PWM Mode, Switching) Waveforms
60 60 SW2 50 50 5V/DIV 40 40 SW1 5V/DIV 30 30 IL DROPOUT (mV) 20 DROPOUT (mV) 20 200mA/DIV 10 10 31291 G22 500ns/DIV L = 10µH 0 0 VIN = 7V –45 –20 5 30 55 80 105 130 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 VOUT = 5V TEMPERATURE (°C) V IOUT = 200mA IN (V) 31291 G20 31291 G21 31291fc For more information www.linear.com/LTC3129-1 7