Datasheet LT3952A (Analog Devices) - 8

LT3952A
TYPICAL PERFORMANCE CHARACTERISTICS ISP/ISN 1/10th Scale Threshold ISP/ISN Overcurrent Threshold ISMON Voltage (CTRL = 0.3V) vs Temperature vs Temperature vs ISP-ISN Voltage
28 395 1.2 27 1.0 385 26 0.8 25 375 0.6 ISP-ISN (mV) ISMON (V) 24 0.4 365 23 0.2 ISP/ISN OVERCURRENT THRESHOLD (mV) 22 355 0 –50 0 50 100 150 –50 0 50 100 150 0 50 100 150 200 250 TEMPERATURE (°C) TEMPERATURE (°C) ISP-ISN (mV) 3952A G19 3952A G20 3952A G21
ISP-ISN Threshold VISP-ISN Threshold vs FB Voltage vs Output Voltage VISP-ISN Threshold vs CTRL
300 255.0 300 VCTRL = 2V 250 250 252.5 200 200 150 250.0 150 ISP-ISN (mV) ISP-ISN (mV) ISP-ISN (mV) 100 100 247.5 50 50 0 245.0 0 1.1 1.15 1.2 1.25 1.3 0 10 20 30 40 50 60 0 0.5 1 1.5 2 FB (V) VOUT (V) CTRL (V) 3952A G22 3952A G23 3952A G24
TG Rise/Fall Time vs Capacitance TG Driver Turn-On TG Driver Turn-Off
900 800 PWM 700 PWM 2V/DIV 2V/DIV 600 tFALL t (ns) RISE 500 400 TG TG t RISE/FALL 5V/DIV 300 5V/DIV PMOS: VISHAY SILICONIX Si7309 PMOS: VISHAY SILICONIX Si7309 200 200ns/DIV 3952A G26 200ns/DIV 3952A G27 100 0 0 2.5 5 7.5 10 CLOAD (nF) 3952A G25 Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Revision History Typical Application Related Parts