Datasheet LTC3833 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing |
| 页数 / 页 | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 530 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Overcurrent Protection. Short-Circuit Protection
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LTC3833
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Overcurrent Protection Short-Circuit Protection Overvoltage Protection
OVERVOLTAGE REGION CURRENT LIMIT (25A) SHORT- CIRCUIT SHORT-CIRCUIT OVERVOLTAGE TRIGGER REGION TRIGGER V I OUT LOAD 7.5A 7.5A 200mV/DIV 10A/DIV VOUT 1V/DIV IL I I I 10A/DIV LOAD LOAD NOTE 7 L V 12A 12A 20A/DIV OUT DROOPS DUE TO IL REACHING CURRENT LIMIT 10A/DIV VOUT BG 200mV/DIV 5V/DIV INDUCTOR CURRENT FOLDBACK DURING SHORT-CIRCUIT NOTE 8 10ms/DIV 3833 G10 VIN = 12V 1ms/DIV 3833 G11 VIN = 12V 20µs/DIV 3833 G12 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT NOTE 7: INDUCTOR CURRENT REACHES NOTE 8: BG IS FORCED HIGH FOR EXTENDED CURRENT LIMIT BEFORE FOLDBACK PERIODS TO REMOVE OVERVOLTAGE AND DURING SHORT-CIRCUIT RECOVERY
Output Regulation Output Regulation Output Regulation vs Input Voltage vs Load Current vs Temperature
0.2 0.2 0.2 VOUT = 0.6V VIN = 15V VIN = 15V ILOAD = 5A VOUT = 0.6V VOUT = 0.6V VOUT NORMALIZED AT VIN = 15V VOUT NORMALIZED AT ILOAD = 4A ILOAD = 0A 0.1 0.1 0.1 VOUT NORMALIZED AT TA = 25°C (%) (%) (%) OUT OUT OUT 0 0 0 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 –0.2 –0.2 –0.2 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 –50 –25 0 25 50 55 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3833 G13 3833 G14 3833 G15
Non-Synchronized Switching Non-Synchronized Switching Non-Synchronized Switching Frequency vs Input Voltage Frequency vs Load Current Frequency vs Temperature
2.0 0.2 1.0 VIN = 15V VIN = 15V, VOUT = 0.6V V I 1.5 OUT = 0.6A LOAD = 0A, f = 500kHz f = 500kHz 0.5 FREQUENCY NORMALIZED AT TA = 25°C 0.1 FREQUENCY NORMALIZED AT ILOAD = 4A 1.0 0 0.5 0 –0.5 0 –1.0 NORMALIZED ∆f (%) NORMALIZED ∆f (%) NORMALIZED ∆f (%) VOUT = 0.6V –0.1 –0.5 ILOAD = 5A –1.5 f = 500kHz FREQUENCY NORMALIZED AT VIN = 15V –1.0 –0.2 –2.0 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 –50 –25 0 25 50 75 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3833 G16 3833 G17 3833 G18 3833f 6
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Overcurrent Protection Short-Circuit Protection Overvoltage Protection
OVERVOLTAGE REGION CURRENT LIMIT (25A) SHORT- CIRCUIT SHORT-CIRCUIT OVERVOLTAGE TRIGGER REGION TRIGGER V I OUT LOAD 7.5A 7.5A 200mV/DIV 10A/DIV VOUT 1V/DIV IL I I I 10A/DIV LOAD LOAD NOTE 7 L V 12A 12A 20A/DIV OUT DROOPS DUE TO IL REACHING CURRENT LIMIT 10A/DIV VOUT BG 200mV/DIV 5V/DIV INDUCTOR CURRENT FOLDBACK DURING SHORT-CIRCUIT NOTE 8 10ms/DIV 3833 G10 VIN = 12V 1ms/DIV 3833 G11 VIN = 12V 20µs/DIV 3833 G12 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT NOTE 7: INDUCTOR CURRENT REACHES NOTE 8: BG IS FORCED HIGH FOR EXTENDED CURRENT LIMIT BEFORE FOLDBACK PERIODS TO REMOVE OVERVOLTAGE AND DURING SHORT-CIRCUIT RECOVERY
Output Regulation Output Regulation Output Regulation vs Input Voltage vs Load Current vs Temperature
0.2 0.2 0.2 VOUT = 0.6V VIN = 15V VIN = 15V ILOAD = 5A VOUT = 0.6V VOUT = 0.6V VOUT NORMALIZED AT VIN = 15V VOUT NORMALIZED AT ILOAD = 4A ILOAD = 0A 0.1 0.1 0.1 VOUT NORMALIZED AT TA = 25°C (%) (%) (%) OUT OUT OUT 0 0 0 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 –0.2 –0.2 –0.2 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 –50 –25 0 25 50 55 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3833 G13 3833 G14 3833 G15
Non-Synchronized Switching Non-Synchronized Switching Non-Synchronized Switching Frequency vs Input Voltage Frequency vs Load Current Frequency vs Temperature
2.0 0.2 1.0 VIN = 15V VIN = 15V, VOUT = 0.6V V I 1.5 OUT = 0.6A LOAD = 0A, f = 500kHz f = 500kHz 0.5 FREQUENCY NORMALIZED AT TA = 25°C 0.1 FREQUENCY NORMALIZED AT ILOAD = 4A 1.0 0 0.5 0 –0.5 0 –1.0 NORMALIZED ∆f (%) NORMALIZED ∆f (%) NORMALIZED ∆f (%) VOUT = 0.6V –0.1 –0.5 ILOAD = 5A –1.5 f = 500kHz FREQUENCY NORMALIZED AT VIN = 15V –1.0 –0.2 –2.0 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 –50 –25 0 25 50 75 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3833 G16 3833 G17 3833 G18 3833f 6