Datasheet LTC3129 (Analog Devices) - 6

LTC3129
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Burst Mode Threshold FB Voltage vs Temperature vs VIN and VOUT Switch RDS(ON) vs Temperature (Normalized to 25°C)
80 1.3 1.00 VCC = 2.5V 1.2 V 70 CC = 3V 0.75 VCC = 4V 1.1 VCC = 5V 60 0.50 1.0 50 TAGE (%) 0.25 (Ω) 0.9 40 0 0.8 LOAD (mA) VOUT = 2.5V R DS(ON) 30 V –0.25 OUT = 3.3V 0.7 VOUT = 4.1V 20 VOUT = 5V 0.6 –0.50 V CHANGE IN FB VOL OUT = 6.9V 10 VOUT = 8.2V 0.5 –0.75 VOUT = 12V V 0 OUT = 15V 0.4 –1.00 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) IN (V) TEMPERATURE (°C) 3129 G13 3129 G14 3129 G15
Accurate RUN Threshold Average Input Current Limit Maximum Output Current vs Temperature (Normalized to 25°C) vs MPPC Voltage vs Temperature (Normalized to 25°C)
2 100 15 90 10 80 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) 3129 G16 3129 G17 3129 G18
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 3129 G21 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) 3129 G19 3129 G20 3129fc 6 For more information www.linear.com/LTC3129 Document Outline Features Applications Typical Application Description 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