Datasheet LTC3765 (Analog Devices) - 4

LTC3765
TYPICAL PERFORMANCE CHARACTERISTICS VCC Supply Current VCC UVLO Thresholds Charge Pump Output Current vs Supply Voltage vs Temperature vs VCC Supply Current
2.0 7.6 100 7.5 90 RISING 80 1.5 7.4 70 7.3 NDRV = VCC + 2V 60 1.0 7.2 50 7.1 40 30 SUPPLY CURRENT (mA) UVLO THRESHOLD (V) 0.5 7.0 FALLING NDRV = VCC + 4V CHARGE PUMP CURRENT (µA) 20 6.9 10 0 6.8 0 0 5 10 15 –55 –25 5 35 65 95 125 155 3 4 5 6 7 8 9 SUPPLY VOLTAGE (V) TEMPERATURE (°C) VCC VOLTAGE (V) 3765 G01 3765 G02 3765 G03
Charge Pump Output Current Start-Up Oscillator Frequency Start-Up Oscillator Frequency vs Temperature vs RFS Resistor Value vs Temperature
50 500 500 VCC = 5V 450 450 RFS = 10kΩ 45 400 400 NDRV = 7V 40 350 350 300 300 35 250 250 RFS = 20kΩ 200 200 30 FREQUENCY (kHz) 150 FREQUENCY (kHz) 150 NDRV = 9V CHARGE PUMP CURRENT (µA) 100 R 25 100 FS = 75kΩ 50 50 20 0 0 –55 –25 5 35 65 95 125 155 0 10 20 30 40 50 60 70 80 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) RFS (kΩ) TEMPERATURE (°C) 3765 G04 3765 G05 3765 G06
ISMAG Thresholds ISMAG Replicated Slope ISMAG Replicated Slope vs Temperature vs RUN Pin Voltage and RCORE vs Temperature
1.03 1800 500 VRUN = 1.5V 1600 450 1.02 1400 400 RCORE = 10kΩ 350 1.01 1200 POSITIVE THRESHOLD MAGNITUDE RCORE = 10kΩ 300 1000 1.00 250 800 NEGATIVE THRESHOLD MAGNITUDE 200 0.99 600 RCORE = 30kΩ R 150 CORE = 30kΩ REPLICATED SLOPE (mV/µs) 400 REPLICATED SLOPE (mV/µs) 100 RCORE = 50kΩ 0.98 THRESHOLD VOLTAGE MAGNITUDE (V) 200 RCORE = 50kΩ 50 0.97 0 0 –55 –25 5 35 65 95 125 155 1 2 3 4 5 6 7 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) RUN PIN VOLTAGE (V) TEMPERATURE (°C) 3765 G07 3765 G08 3765 G09 3765fb 4 For more information www.linear.com/LTC3765 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts