Datasheet LTC3548-1 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Dual Synchronous, Fixed Output 2.25MHz Step-Down DC/DC Regulator |
| 页数 / 页 | 16 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| 文件格式/大小 | PDF / 332 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency. Effi ciency vs Input Voltage
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LTC3548-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency Oscillator Frequency Effi ciency vs Input Voltage vs Temperature vs Input Voltage
100 2.5 10 VIN = 3.6V 8 95 IOUT = 100mA 2.4 6 90 4 85 2.3 2 80 I 0 OUT = 800mA IOUT = 10mA 2.2 –2 EFFICIENCY (%) 75 IOUT = 1mA FREQUENCY (MHz) –4 70 2.1 FREQUENCY DEVIATION (%) –6 65 –8 60 2.0 –10 2 2.5 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3548-1 G04 3548-1 G05 3548-1 G06
Output Voltage Error vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Junction Temperature
1 500 550 VIN = 3.6V VIN = 2.7V 0.8 500 450 V 0.6 IN = 3.6V 450 VIN = 4.2V 0.4 400 MAIN 400 0.2 SWITCH (mΩ) 350 (mΩ) 0 350 300 –0.2 DS(ON) DS(ON) R R 300 250 –0.4 SYNCHRONOUS 200 OUTPUT VOLTAGE ERROR (%) –0.6 SWITCH 250 –0.8 150 MAIN SWITCH SYNCHRONOUS SWITCH –1 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (°C) 3548-1 G07 3548-1 G08 3548-1 G09
Effi ciency vs Load Current Load Regulation Line Regulation
100 2.0 0.5 95 1.5 0.4 0.3 90 1.0 VOUT1 = 1.8V VOUT1 = 1.8V VOUT1 = 1.8V 0.2 85 0.5 V 0.1 OUT2 = 1.575V VOUT2 = 1.575V 80 0 0 ERROR (%) VOUT2 = 1.575V ERROR (%) 75 –0.1 EFFICIENCY (%) OUT –0.5 V OUTV–0.2 70 –1.0 –0.3 65 –1.5 –0.4 60 –2.0 –0.5 1 10 100 1000 1 10 100 1000 2.5 3 3.5 4 4.5 5 5.5 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3548-1 G11 3548-1 G12 3548-1 G15 35481fc 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency Oscillator Frequency Effi ciency vs Input Voltage vs Temperature vs Input Voltage
100 2.5 10 VIN = 3.6V 8 95 IOUT = 100mA 2.4 6 90 4 85 2.3 2 80 I 0 OUT = 800mA IOUT = 10mA 2.2 –2 EFFICIENCY (%) 75 IOUT = 1mA FREQUENCY (MHz) –4 70 2.1 FREQUENCY DEVIATION (%) –6 65 –8 60 2.0 –10 2 2.5 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 2 3 4 5 6 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3548-1 G04 3548-1 G05 3548-1 G06
Output Voltage Error vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Junction Temperature
1 500 550 VIN = 3.6V VIN = 2.7V 0.8 500 450 V 0.6 IN = 3.6V 450 VIN = 4.2V 0.4 400 MAIN 400 0.2 SWITCH (mΩ) 350 (mΩ) 0 350 300 –0.2 DS(ON) DS(ON) R R 300 250 –0.4 SYNCHRONOUS 200 OUTPUT VOLTAGE ERROR (%) –0.6 SWITCH 250 –0.8 150 MAIN SWITCH SYNCHRONOUS SWITCH –1 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) INPUT VOLTAGE (V) JUNCTION TEMPERATURE (°C) 3548-1 G07 3548-1 G08 3548-1 G09
Effi ciency vs Load Current Load Regulation Line Regulation
100 2.0 0.5 95 1.5 0.4 0.3 90 1.0 VOUT1 = 1.8V VOUT1 = 1.8V VOUT1 = 1.8V 0.2 85 0.5 V 0.1 OUT2 = 1.575V VOUT2 = 1.575V 80 0 0 ERROR (%) VOUT2 = 1.575V ERROR (%) 75 –0.1 EFFICIENCY (%) OUT –0.5 V OUTV–0.2 70 –1.0 –0.3 65 –1.5 –0.4 60 –2.0 –0.5 1 10 100 1000 1 10 100 1000 2.5 3 3.5 4 4.5 5 5.5 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3548-1 G11 3548-1 G12 3548-1 G15 35481fc 4