Datasheet LTC3405A-1.375 (Analog Devices) - 4

LTC3405A-1.375
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. (From Figure 1a) Dynamic Supply Current Dynamic Supply Current vs Supply Voltage vs Temperature Switch Leakage vs Temperature
160 1600 340 V VIN = 5.5V I IN = 3.6V LOAD = 0A 1400 300 ILOAD = 0A 140 RUN = 0V 260 PULSE SKIPPING MODE 120 A) 1200 A) µ µ 220 100 1000 180 80 800 140 60 600 100 SWITCH LEAKAGE (nA) SYNCHRONOUS SUPPLY CURRENT ( SUPPLY CURRENT ( 40 400 SWITCH PULSE SKIPPING MODE 60 20 MAIN SWITCH 200 Burst Mode OPERATION Burst Mode OPERATION 20 0 0 0 –50 –25 0 25 50 75 100 125 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –50 –25 0 25 50 75 100 125 TEMPERATURE ( SUPPLY VOLTAGE (V) TEMPERATURE ( °C) °C) 3405A1375 G11 3405A1375 G09 3405A1375 G10
Switch Leakage vs Input Voltage Burst Mode Operation Pulse Skipping Mode Operation
60 RUN = 0V 50 SW SW SYNCHRONOUS 5V/DIV 5V/DIV SWITCH 40 VOUT VOUT 100mV/DIV 30 10mV/DIV AC COUPLED 20 SWITCH LEAKAGE (pA) IL IL MAIN SWITCH 100mA/DIV 100mA/DIV 10 0 0 1 2 3 4 5 6 V 5 IN = 3.6V µs/DIV V 500ns/DIV IN = 3.6V I I LOAD = 20mA INPUT VOLTAGE (V) LOAD = 20mA 3405A1375 G12 3405A1375 G13 3405A1375 G14
Start-Up from Shutdown Load Step
VOUT 100mV/DIV AC RUN COUPLED 2V/DIV VOUT 1V/DIV IL 200mA/DIV IL ILOAD 200mA/DIV 200mA/DIV V 40 IN = 3.6V µs/DIV V 20 IN = 3.6V µs/DIV I I LOAD = 200mA LOAD = 0mA TO 250mA PULSE SKIPPING MODE 3405A1375 G15 3405A1375 G16 3405a1375f 4