Datasheet LTC3829 (Analog Devices) - 7

LTC3829
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Voltage Maximum Current Sense Threshold Maximum Current Sense Voltage vs Feedback Voltage vs Common Mode Voltage vs Duty Cycle (Current Foldback)
90 100 100 80 ILIM = INTVCC 90 90 I 70 80 LIM = INTVCC 80 ILIM = INTVCC 60 70 70 ILIM = FLOAT 60 60 50 ILIM = FLOAT ILIM = FLOAT 50 50 40 ILIM = GND 40 I 40 30 LIM = GND ILIM = GND 30 30 20 20 20 CURRENT SENSE THRESHOLD (mV) 10 10 10 MAXIMUM CURRENT SENSE VOLTAGE (mV) MAXIMUM CURRENT SENSE VOLTAGE (mV) 0 0 0 0 1 2 3 4 5 0 10 20 30 40 50 60 70 80 90 100 0 0.1 0.2 0.3 0.4 0.5 0.6 VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) FEEDBACK VOLTAGE (V) 3829 G11 3829 G12 3829 G13
TK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
1.5 1.4 0.604 0.602 1.4 1.3 0.600 TAGE (V) ON 1.3 1.2 (V) 0.598 V FB OFF 0.596 TK/SS CURRENT (µA) 1.2 RUN PIN VOL 1.1 0.594 1.1 1.0 0.592 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATAURE (°C) 3829 G14 3829 G15 3829 G16
Oscillator Frequency Undervoltage Lockout Threshold Oscillator Frequency vs Temperature (INTVCC) vs Temperature vs Input Voltage
4.3 800 4.1 RISING VFREQ ≥ 2.4V 700 VFREQ ≥ 2.4V 3.9 600 600 3.7 VFREQ = 1.2V VFREQ = 1.2V 3.5 500 FALLING 400 3.3 V FREQUENCY (kHz) 400 3.1 FREQUENCY (kHz) FREQ = 0V UVLO THRESHOLD (V) 200 2.9 300 VFREQ = 0V 2.7 200 2.5 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3829 G17 3829 G18 3829 G19 Rev. E For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts