Datasheet LTC3542 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | 500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| Seiten / Seite | 16 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. … |
| Dateiformat / Größe | PDF / 222 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Start-Up from Shutdown. Load Step
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LTC3542
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Start-Up from Shutdown Load Step Load Step
VOUT VOUT RUN 100mV/DIV 100mV/DIV 2V/DIV AC COUPLED AC COUPLED VOUT IL I 1V/DIV 500mA/DIV L 500mA/DIV IL ILOAD ILOAD 500mA/DIV 500mA/DIV 500mA/DIV VIN = 3.6V 400μs/DIV 3542 G04 VIN = 3.6V 20μs/DIV 3542 G05 VIN = 3.6V 20μs/DIV 3542 G06 VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 500mA ILOAD = 30mA TO 500mA ILOAD = 0mA TO 500mA FIGURE 3a CIRCUIT FIGURE 3a CIRCUIT FIGURE 3a CIRCUIT
Reference Voltage Oscillator Frequency Oscillator Frequency vs Temperature vs Temperature vs Supply Voltage
0.6150 2.7 2.7 0.6125 2.6 2.6 0.6100 0.6075 2.5 2.5 0.6050 2.4 2.4 0.6025 2.3 (V) 0.6000 2.3 REF 0.5975 V 2.2 2.2 0.5950 0.5925 2.1 FREQUENCY (MHz) 2.1 FREQUENCY (MHz) 0.5900 2.0 2.0 0.5875 1.9 1.9 0.5850 0.5825 1.8 1.8 –50 –25 0 25 50 75 100 125 –50 –30 –10 10 30 50 70 90 110 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3542 G07 3542 G08 3542 G09
Output Voltage vs Supply Voltage Output Voltage vs Load Current RDS(ON) vs Input Voltage
0.5 2.0 0.9 VOUT = 1.8V VIN = 3.6V 0.4 IOUT = 100mA 1.5 VOUT = 1.8V 0.8 0.3 Burst Mode 0.7 1.0 OPERATION 0.2 0.6 0.1 0.5 ) 9 MAIN SWITCH ( 0.5 0 0 ERROR (%) ERROR (%) PULSE SKIP 0.4 –0.1 DS(ON) OUT –0.5 MODE R V OUTV 0.3 –0.2 SYNCHRONOUS –1.0 SWITCH –0.3 0.2 –0.4 –1.5 0.1 –0.5 –2.0 0 2 2.5 3 3.5 4 4.5 5 5.5 6 1 10 100 1000 1 2 3 4 5 6 7 INPUT VOLTAGE (V) LOAD CURRENT (mA) VIN (V) 3542 G10 3542 G11 3542 G12 3542fa 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specifi ed. Start-Up from Shutdown Load Step Load Step
VOUT VOUT RUN 100mV/DIV 100mV/DIV 2V/DIV AC COUPLED AC COUPLED VOUT IL I 1V/DIV 500mA/DIV L 500mA/DIV IL ILOAD ILOAD 500mA/DIV 500mA/DIV 500mA/DIV VIN = 3.6V 400μs/DIV 3542 G04 VIN = 3.6V 20μs/DIV 3542 G05 VIN = 3.6V 20μs/DIV 3542 G06 VOUT = 1.8V VOUT = 1.8V VOUT = 1.8V ILOAD = 500mA ILOAD = 30mA TO 500mA ILOAD = 0mA TO 500mA FIGURE 3a CIRCUIT FIGURE 3a CIRCUIT FIGURE 3a CIRCUIT
Reference Voltage Oscillator Frequency Oscillator Frequency vs Temperature vs Temperature vs Supply Voltage
0.6150 2.7 2.7 0.6125 2.6 2.6 0.6100 0.6075 2.5 2.5 0.6050 2.4 2.4 0.6025 2.3 (V) 0.6000 2.3 REF 0.5975 V 2.2 2.2 0.5950 0.5925 2.1 FREQUENCY (MHz) 2.1 FREQUENCY (MHz) 0.5900 2.0 2.0 0.5875 1.9 1.9 0.5850 0.5825 1.8 1.8 –50 –25 0 25 50 75 100 125 –50 –30 –10 10 30 50 70 90 110 2 3 4 5 6 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3542 G07 3542 G08 3542 G09
Output Voltage vs Supply Voltage Output Voltage vs Load Current RDS(ON) vs Input Voltage
0.5 2.0 0.9 VOUT = 1.8V VIN = 3.6V 0.4 IOUT = 100mA 1.5 VOUT = 1.8V 0.8 0.3 Burst Mode 0.7 1.0 OPERATION 0.2 0.6 0.1 0.5 ) 9 MAIN SWITCH ( 0.5 0 0 ERROR (%) ERROR (%) PULSE SKIP 0.4 –0.1 DS(ON) OUT –0.5 MODE R V OUTV 0.3 –0.2 SYNCHRONOUS –1.0 SWITCH –0.3 0.2 –0.4 –1.5 0.1 –0.5 –2.0 0 2 2.5 3 3.5 4 4.5 5 5.5 6 1 10 100 1000 1 2 3 4 5 6 7 INPUT VOLTAGE (V) LOAD CURRENT (mA) VIN (V) 3542 G10 3542 G11 3542 G12 3542fa 4