Datasheet LTC3548-2 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Dual Synchronous, Fixed/Adjustable Output, 2.25MHz Step-Down DC/DC Regulator |
| Seiten / Seite | 16 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| Dateiformat / Größe | PDF / 418 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Oscillator Frequency. Effi ciency vs Input Voltage
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LTC3548-2
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 95 8 100mA 2.4 6 90 10mA 4 85 1mA 2.3 2 80 0 800mA 2.2 75 –2 EFFICIENCY (%) FREQUENCY (MHz) –4 70 2.1 FREQUENCY DEVIATION (%) –6 VOUT = 1.8V, CHANNEL 1 65 Burst Mode OPERATION –8 CIRCUIT OF FIGURE 3 60 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) VIN (V) 35482 G04 35482 G05 35482 G06
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Junction Temperature
0.615 500 550 V V IN = 3.6V IN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 MAIN 400 SWITCH (mΩ) 350 (mΩ) 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 SYNCHRONOUS REFERENCE VOLTAGE (V) 200 SWITCH 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –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) VIN (V) JUNCTION TEMPERATURE (°C) 35482 G07 35482 G08 3548 G09
Effi ciency vs Load Current Load Regulation Line Regulation
100 2.0 0.5 VOUT = 1.8V 0.4 95 1.5 IOUT = 200mA Burst Mode OPERATION 0.3 90 Burst Mode OPERATION 1.0 0.2 85 0.5 0.1 80 0 0 ERROR (%) PULSE-SKIPPING MODE ERROR (%) 75 –0.5 –0.1 EFFICIENCY (%) PULSE-SKIPPING MODE OUT OUT V V –0.2 70 –1.0 –0.3 V 65 IN = 3.6V, VOUT = 1.8V –1.5 VIN = 3.6V, VOUT = 1.8V NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL –0.4 CHANNEL 1; CIRCUIT OF FIGURE 3 60 CHANNEL 1; CIRCUIT OF FIGURE 3 –2.0 –0.5 1 10 100 1000 1 10 100 1000 2 3 4 5 6 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 35482 G10 35482 G11 35482 G12 35482fb 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 95 8 100mA 2.4 6 90 10mA 4 85 1mA 2.3 2 80 0 800mA 2.2 75 –2 EFFICIENCY (%) FREQUENCY (MHz) –4 70 2.1 FREQUENCY DEVIATION (%) –6 VOUT = 1.8V, CHANNEL 1 65 Burst Mode OPERATION –8 CIRCUIT OF FIGURE 3 60 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) VIN (V) 35482 G04 35482 G05 35482 G06
Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Junction Temperature
0.615 500 550 V V IN = 3.6V IN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 MAIN 400 SWITCH (mΩ) 350 (mΩ) 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 SYNCHRONOUS REFERENCE VOLTAGE (V) 200 SWITCH 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –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) VIN (V) JUNCTION TEMPERATURE (°C) 35482 G07 35482 G08 3548 G09
Effi ciency vs Load Current Load Regulation Line Regulation
100 2.0 0.5 VOUT = 1.8V 0.4 95 1.5 IOUT = 200mA Burst Mode OPERATION 0.3 90 Burst Mode OPERATION 1.0 0.2 85 0.5 0.1 80 0 0 ERROR (%) PULSE-SKIPPING MODE ERROR (%) 75 –0.5 –0.1 EFFICIENCY (%) PULSE-SKIPPING MODE OUT OUT V V –0.2 70 –1.0 –0.3 V 65 IN = 3.6V, VOUT = 1.8V –1.5 VIN = 3.6V, VOUT = 1.8V NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL –0.4 CHANNEL 1; CIRCUIT OF FIGURE 3 60 CHANNEL 1; CIRCUIT OF FIGURE 3 –2.0 –0.5 1 10 100 1000 1 10 100 1000 2 3 4 5 6 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 35482 G10 35482 G11 35482 G12 35482fb 4