Datasheet LTC7103 (Analog Devices) - 7

LTC7103
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Quiescent Input Current vs Input VIN Quiescent Current vs Voltage Temperature Inductor Current at Light Load
10 35 SLEEP, EXTV VIN = 100V CC = GND EXTV 30 CC = GND PULSE–SKIPPING 8 MODE 200mA/DIV 25 6 20 Burst Mode OPERATION Y CURRENT (µA) Y CURRENT (µA) 15 500mA/DIV 4 SLEEP SUPPL SUPPL 10 V IN 2 V IN 7103 G21 SHUTDOWN 5 10µs/DIV V SHUTDOWN IN = 48V I 0 0 LOAD = 200µA 0 15 30 45 60 75 90 105 –55 –25 5 35 65 95 125 155 FIGURE 14 CIRCUIT VIN VOLTAGE (V) TEMPERATURE (°C) 7103 G19 7103 G20
Load Step Burst Mode Operation Load Step Pulse-Skipping Mode SW Node Waveform at Full Load
VOUT VOUT 100mV/DIV 100mV/DIV VSW 10V/DIV IL IL 1A/DIV 1A/DIV 7103 G24 40µs/DIV 7103 G22 40µs/DIV 7103 G23 50ns/DIV LOAD STEP = 50mA TO 1A LOAD STEP = 50mA TO 1A VIN = 48V V I IN = 48V VIN = 48V LOAD = 2.3A FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT
Synchronization to External Clock Start-Up from Shutdown Short-Circuit and Recovery
VSW VOUT 20V/DIV 2V/DIV VOUT 2V/DIV IL EXTERNAL 500mA/DIV CLOCK ON IL PLLIN/MODE VRUN 1A/DIV 2V/DIV 5V/DIV 10µs/DIV 7103 G25 200µs/DIV 7103 G26 100µs/DIV 7103 G27 VIN = 48V VIN = 48V VIN = 48V ILOAD = 1A Burst Mode OPERATION PULSE–SKIPPING MODE FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT Rev. B For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts