Datasheet LTC3802 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking |
| 页数 / 页 | 28 / 6 — TYPICAL PERFOR A CE CHARACTERISTICS. Burst Mode Waveform. Load Step in … |
| 文件格式/大小 | PDF / 359 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS. Burst Mode Waveform. Load Step in Continuous Mode. Load Step in Burst Mode Operation
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LTC3802
W U TYPICAL PERFOR A CE CHARACTERISTICS Burst Mode Waveform Load Step in Continuous Mode Load Step in Burst Mode Operation with 0.2A Load
VOUT 1.2V VOUT VOUT 50mV/DIV 1.2V 1.2V 50mV/DIV 50mV/DIV VSW VSW 10V/DIV 10V/DIV IOUT IOUT 1A TO 10A 1A TO 10A INDUCTOR STEP STEP CURRENT 5A/DIV 5A/DIV 5A/DIV 3802 G09 V 20 3802 G08 3802 G10 IN = 12V µs/DIV V 50 IN = 12V µs/DIV V 50 IN = 12V µs/DIV CIRCUIT ON CIRCUIT ON CIRCUIT ON FIRST PAGE OF THIS DATA SHEET FIRST PAGE OF THIS DATA SHEET FIRST PAGE OF THIS DATA SHEET
Burst Mode Waveform with 3A Load ILIM(TH) Offset vs VIMAX ILIM(TH) Offset vs Temperature
10 10 T V A = 25°C CC = 5V V V V IMAX = 500mV OUT CC = 5V 1.2V 6 6 50mV/DIV 2 2 VSW 10V/DIV OFFSET (mV) OFFSET (mV) –2 –2 INDUCTOR I LIM(TH) I LIM(TH) CURRENT –6 –6 5A/DIV –10 –10 V 20 3802 G11 IN = 12V µs/DIV 0 200 400 600 800 1000 –50 –25 0 25 50 75 100 125 CIRCUIT ON V TEMPERATURE (°C) FIRST PAGE OF THIS DATA SHEET IMAX (mV) 3802 G12 3802 G13
Switching Frequency Switching Frequency Short-Circuit Test vs Temperature vs VCC Supply Voltage
600 600 VCC = 5V TA = 25°C TG 10V/DIV 580 580 560 560 RUN/SS 2V/DIV 540 540 INDUCTOR CURRENT 520 20A/DIV SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 520 500 500 CIRCUIT ON 5µs/DIV 3802 G14 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 FIRST PAGE OF THIS DATA SHEET TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) VIN = 12V, VOUT = 3.3V, CSS = 0.01µF, R 3802 G15 3802 G16 I(MAX) = 47k, L = 1µH (TOKO-FDA1254-1ROM) 3802f 6
W U TYPICAL PERFOR A CE CHARACTERISTICS Burst Mode Waveform Load Step in Continuous Mode Load Step in Burst Mode Operation with 0.2A Load
VOUT 1.2V VOUT VOUT 50mV/DIV 1.2V 1.2V 50mV/DIV 50mV/DIV VSW VSW 10V/DIV 10V/DIV IOUT IOUT 1A TO 10A 1A TO 10A INDUCTOR STEP STEP CURRENT 5A/DIV 5A/DIV 5A/DIV 3802 G09 V 20 3802 G08 3802 G10 IN = 12V µs/DIV V 50 IN = 12V µs/DIV V 50 IN = 12V µs/DIV CIRCUIT ON CIRCUIT ON CIRCUIT ON FIRST PAGE OF THIS DATA SHEET FIRST PAGE OF THIS DATA SHEET FIRST PAGE OF THIS DATA SHEET
Burst Mode Waveform with 3A Load ILIM(TH) Offset vs VIMAX ILIM(TH) Offset vs Temperature
10 10 T V A = 25°C CC = 5V V V V IMAX = 500mV OUT CC = 5V 1.2V 6 6 50mV/DIV 2 2 VSW 10V/DIV OFFSET (mV) OFFSET (mV) –2 –2 INDUCTOR I LIM(TH) I LIM(TH) CURRENT –6 –6 5A/DIV –10 –10 V 20 3802 G11 IN = 12V µs/DIV 0 200 400 600 800 1000 –50 –25 0 25 50 75 100 125 CIRCUIT ON V TEMPERATURE (°C) FIRST PAGE OF THIS DATA SHEET IMAX (mV) 3802 G12 3802 G13
Switching Frequency Switching Frequency Short-Circuit Test vs Temperature vs VCC Supply Voltage
600 600 VCC = 5V TA = 25°C TG 10V/DIV 580 580 560 560 RUN/SS 2V/DIV 540 540 INDUCTOR CURRENT 520 20A/DIV SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 520 500 500 CIRCUIT ON 5µs/DIV 3802 G14 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 FIRST PAGE OF THIS DATA SHEET TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) VIN = 12V, VOUT = 3.3V, CSS = 0.01µF, R 3802 G15 3802 G16 I(MAX) = 47k, L = 1µH (TOKO-FDA1254-1ROM) 3802f 6