Datasheet LT3437 (Analog Devices) - 7

LT3437
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum Duty Cycle VC Switching Threshold Dropout Operation vs Temperature vs Temperature
6 94.5 0.6 I V LOAD = 250mA OUT = 5V ILOAD = 250mA 5 BOOST DIODE = DIODES INC B1100 94.0 0.5 4 93.5 0.4 3 93.0 0.3 VOLTAGE (V) C 2 92.5 V 0.2 OUTPUT VOLTAGE (V) MAXIMUM DUTY CYCLE (%) 92.0 0.1 1 91.5 0 0 2.0 2.5 3.0 3.5 4.5 5.5 6.0 –50 –25 0 25 50 75 100 125 150 4.0 5.0 –50 –25 0 25 50 75 100 125 150 TEMPERATURE ( INPUT VOLTAGE (V) °C) TEMPERATURE (°C) 3437 G20 3437 G21 3437 G19
Maximum Sync Frequency vs Temperature Burst Mode Operation Burst Mode Defeated
1600 VIN = 12V VOUT 1500 VOUT = 3.3V 20mV/DIV I V 1400 OUT = 100mA AC COUPLED OUT 20mV/DIV 1300 AC COUPLED 1200 1100 1000 900 I I SW SW 800 100mA/DIV 100mA/DIV 700 V 600 IN = 12V 10µs/DIV 3437 G23 VIN = 12V 10µs/DIV 3437 G24 MAXIMUM SYNC FREQUENCY (kHz) VOUT = 3.3V V 500 OUT = 3.3V IQ = 100µA IQ = 1.7mA 400 VSYNC = 3.3V –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3437 G22
Step Response Step Response
VOUT V 50mV/DIV OUT 50mV/DIV IOUT 100mA/DIV IOUT 100mA/DIV 1ms/DIV 3437 G25 1ms/DIV 3437 G26 LOAD STEP 0mA TO 200mA LOAD STEP 100mA TO 300mA 3437fc 7