Datasheet LTC3828 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Dual, 2-Phase Step-Down Controller with Tracking |
| 页数 / 页 | 32 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 388 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Supply Current vs Input Voltage. Undervoltage Lockout
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LTC3828
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Supply Current vs Input Voltage Undervoltage Lockout (Figure 14) Internal 5V LDO Line Regulation vs Temperature
1200 5.2 3.8 ILOAD = 1mA 1000 BOTH CONTROLLERS ON 5.0 3.6 800 4.8 600 4.6 3.4 VOLTAGE (V) CC 400 4.4 INTV SUPPLY CURRENT (μA) 3.2 200 4.2 UNDERVOLTAGE LOCKOUT (V) SHUTDOWN 0 4.0 3.0 0 5 10 15 20 25 30 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 3828 G04 3828 G05 3828 G06
Oscillator Frequency vs Current Sense Pin Input Current vs Temperature TRCKSS Current vs Temperature Temperature
700 1.5 37 600 VPLLFLTR = 2.4V 1.3 35 500 VPLLFLTR = 1.2V 1.1 400 33 300 VPLLFLTR = 0V 0.9 FREQUENCY (kHz) 200 TRCKSS CURRENT (μA) 31 0.7 100 CURRENT SENSE INPUT CURRENT (μA) 0 0.5 29 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3828 G07 3828 G08 3828 G09
Maximum Current Sense Threshold vs Temperature INTVCC Voltage vs Temperature Load Regulation
80 5.1 0 VOUT = 5V FCB = 0V VIN = 15V 78 FIGURE 14 5.0 –0.1 (%) 76 OUT (mV) 4.9 –0.2 VOLTAGE (V) SENSEV 74 CC INTV 4.8 NORMALIZED V –0.3 72 70 4.7 –0.4 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 3828 G10 3828 G11 3828 G12 3828fc 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Supply Current vs Input Voltage Undervoltage Lockout (Figure 14) Internal 5V LDO Line Regulation vs Temperature
1200 5.2 3.8 ILOAD = 1mA 1000 BOTH CONTROLLERS ON 5.0 3.6 800 4.8 600 4.6 3.4 VOLTAGE (V) CC 400 4.4 INTV SUPPLY CURRENT (μA) 3.2 200 4.2 UNDERVOLTAGE LOCKOUT (V) SHUTDOWN 0 4.0 3.0 0 5 10 15 20 25 30 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 3828 G04 3828 G05 3828 G06
Oscillator Frequency vs Current Sense Pin Input Current vs Temperature TRCKSS Current vs Temperature Temperature
700 1.5 37 600 VPLLFLTR = 2.4V 1.3 35 500 VPLLFLTR = 1.2V 1.1 400 33 300 VPLLFLTR = 0V 0.9 FREQUENCY (kHz) 200 TRCKSS CURRENT (μA) 31 0.7 100 CURRENT SENSE INPUT CURRENT (μA) 0 0.5 29 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3828 G07 3828 G08 3828 G09
Maximum Current Sense Threshold vs Temperature INTVCC Voltage vs Temperature Load Regulation
80 5.1 0 VOUT = 5V FCB = 0V VIN = 15V 78 FIGURE 14 5.0 –0.1 (%) 76 OUT (mV) 4.9 –0.2 VOLTAGE (V) SENSEV 74 CC INTV 4.8 NORMALIZED V –0.3 72 70 4.7 –0.4 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 3828 G10 3828 G11 3828 G12 3828fc 5