Datasheet LTC3560 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | 2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
| Seiten / Seite | 16 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (From Figure 1a Except for the … |
| Dateiformat / Größe | PDF / 267 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS (From Figure 1a Except for the Resistive Divider Resistor Values)
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LTC3560
TYPICAL PERFORMANCE CHARACTERISTICS (From Figure 1a Except for the Resistive Divider Resistor Values) Dynamic Supply Current vs Temperature Switch Leakage vs Temperature Switch Leakage vs Input Voltage
300 140 1000 V RUN = 0V IN = 3.6V V 900 OUT = 1.2V 120 250 ILOAD = 0A 800 100 700 200 PULSE SKIPPING MODE 600 80 150 MAIN SWITCH 500 MAIN SWITCH 60 400 100 40 300 SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH LEAKAGE (pA) SYNCHRONOUS SWITCH 200 DYNAMIC SUPPLY CURRENT (μA) 50 20 SWITCH Burst Mode OPERATION 100 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3560 G13 3560 G14 3560 G15
Burst Mode Operation Pulse-Skipping Mode Operation Start-Up from Shutdown
RUN SW SW 2V/DIV 2V/DIV 2V/DIV VOUT 1V/DIV VOUT 20mV/DIV VOUT AC COUPLED 20mV/DIV AC COUPLED IL IL IL 500mA/DIV 200mA/DIV 200mA/DIV 2μs/DIV 3560 G16 VIN = 3.6V 500ns/DIV 3560 G17 VIN = 3.6V 500µs/DIV 3560 G18 VIN = 3.6V VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 25mA ILOAD = 25mA ILOAD = 800mA
Load Step Load Step Load Step
VOUT VOUT V 200mV/DIV 200mV/DIV OUT 200mV/DIV AC COUPLED AC COUPLED AC COUPLED IL IL IL 1A/DIV 1A/DIV 1A/DIV ILOAD ILOAD ILOAD 1A/DIV 1A/DIV 1A/DIV 20μs/DIV 3560 G19 VIN = 3.6V 20μs/DIV 3560 G20 VIN = 3.6V 20µs/DIV 3560 G21 VIN = 3.6V VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 0A TO 800mA ILOAD = 50mA TO 800mA ILOAD = 100mA TO 800mA PULSE SKIPPING MODE PULSE SKIPPING MODE PULSE SKIPPING MODE 3560fb 5
TYPICAL PERFORMANCE CHARACTERISTICS (From Figure 1a Except for the Resistive Divider Resistor Values) Dynamic Supply Current vs Temperature Switch Leakage vs Temperature Switch Leakage vs Input Voltage
300 140 1000 V RUN = 0V IN = 3.6V V 900 OUT = 1.2V 120 250 ILOAD = 0A 800 100 700 200 PULSE SKIPPING MODE 600 80 150 MAIN SWITCH 500 MAIN SWITCH 60 400 100 40 300 SWITCH LEAKAGE (nA) SYNCHRONOUS SWITCH LEAKAGE (pA) SYNCHRONOUS SWITCH 200 DYNAMIC SUPPLY CURRENT (μA) 50 20 SWITCH Burst Mode OPERATION 100 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3560 G13 3560 G14 3560 G15
Burst Mode Operation Pulse-Skipping Mode Operation Start-Up from Shutdown
RUN SW SW 2V/DIV 2V/DIV 2V/DIV VOUT 1V/DIV VOUT 20mV/DIV VOUT AC COUPLED 20mV/DIV AC COUPLED IL IL IL 500mA/DIV 200mA/DIV 200mA/DIV 2μs/DIV 3560 G16 VIN = 3.6V 500ns/DIV 3560 G17 VIN = 3.6V 500µs/DIV 3560 G18 VIN = 3.6V VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 25mA ILOAD = 25mA ILOAD = 800mA
Load Step Load Step Load Step
VOUT VOUT V 200mV/DIV 200mV/DIV OUT 200mV/DIV AC COUPLED AC COUPLED AC COUPLED IL IL IL 1A/DIV 1A/DIV 1A/DIV ILOAD ILOAD ILOAD 1A/DIV 1A/DIV 1A/DIV 20μs/DIV 3560 G19 VIN = 3.6V 20μs/DIV 3560 G20 VIN = 3.6V 20µs/DIV 3560 G21 VIN = 3.6V VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 0A TO 800mA ILOAD = 50mA TO 800mA ILOAD = 100mA TO 800mA PULSE SKIPPING MODE PULSE SKIPPING MODE PULSE SKIPPING MODE 3560fb 5