Datasheet LTC3548A (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Dual Synchronous 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
| 页数 / 页 | 20 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| 文件格式/大小 | PDF / 255 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Burst Mode Operation. Pulse-Skipping Mode
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LTC3548A
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Burst Mode Operation Pulse-Skipping Mode
SW SW 5V/DIV 5V/DIV VOUT VOUT 50mV/DIV 10mV/DIV IL 200mA/DIV IL 100mA/DIV 3548A G01 3548A G02 V 1μs/DIV IN = 3.6V 2μs/DIV VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA ILOAD = 50mA FIGURE 3 CIRCUIT FIGURE 3 CIRCUIT
Load Step Soft-Start
VOUT1 200mV/DIV VIN VOUT2 2V/DIV 100mV/DIV IL VOUT1 500mA/DIV 1V/DIV I I LOAD L 500mA/DIV 500mA/DIV 3548A G03 VIN = 3.6V 20μs/DIV 3548A G04 VIN = 3.6V 1ms/DIV VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA TO 600mA ILOAD = 500mA FIGURE 3 CIRCUIT FIGURE 4 CIRCUIT
Oscillator Frequency Oscillator Frequency Efficiency vs Input Voltage vs Temperature vs Supply Voltage
100 2.5 10 100mA VIN = 3.6V 90 800mA 8 80 10mA 2.4 6 1mA 70 4 60 2.3 2 50 0 40 2.2 –2 EFFICIENCY (%) 30 FREQUENCY (MHz) –4 20 2.1 FREQUENCY DEVIATION (%) –6 10 VOUT = 1.8V –8 CIRCUIT OF FIGURE 3 0 2.0 –10 2 3 4 5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3548A G05 3548A G06 3548A G07 3548afa 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Burst Mode Operation Pulse-Skipping Mode
SW SW 5V/DIV 5V/DIV VOUT VOUT 50mV/DIV 10mV/DIV IL 200mA/DIV IL 100mA/DIV 3548A G01 3548A G02 V 1μs/DIV IN = 3.6V 2μs/DIV VIN = 3.6V VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA ILOAD = 50mA FIGURE 3 CIRCUIT FIGURE 3 CIRCUIT
Load Step Soft-Start
VOUT1 200mV/DIV VIN VOUT2 2V/DIV 100mV/DIV IL VOUT1 500mA/DIV 1V/DIV I I LOAD L 500mA/DIV 500mA/DIV 3548A G03 VIN = 3.6V 20μs/DIV 3548A G04 VIN = 3.6V 1ms/DIV VOUT = 1.8V VOUT = 1.8V ILOAD = 50mA TO 600mA ILOAD = 500mA FIGURE 3 CIRCUIT FIGURE 4 CIRCUIT
Oscillator Frequency Oscillator Frequency Efficiency vs Input Voltage vs Temperature vs Supply Voltage
100 2.5 10 100mA VIN = 3.6V 90 800mA 8 80 10mA 2.4 6 1mA 70 4 60 2.3 2 50 0 40 2.2 –2 EFFICIENCY (%) 30 FREQUENCY (MHz) –4 20 2.1 FREQUENCY DEVIATION (%) –6 10 VOUT = 1.8V –8 CIRCUIT OF FIGURE 3 0 2.0 –10 2 3 4 5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3548A G05 3548A G06 3548A G07 3548afa 4