Datasheet LTC3728 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Dual, 550kHz, 2-Phase Synchronous Step-Down Switching Regulator |
| 页数 / 页 | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense Threshold. … |
| 文件格式/大小 | PDF / 1.7 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense Threshold. Current Sense Threshold. vs VRUN/SS (Soft-Start)
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LTC3728
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Threshold Maximum Current Sense Threshold Current Sense Threshold vs VRUN/SS (Soft-Start) vs Sense Common Mode Voltage vs ITH Voltage
80 80 90 VSENSE(CM) = 1.6V 80 70 76 60 60 50 72 40 (mV) (mV) (mV) 40 30 SENSE SENSE 20 V SENSEV 68 V 10 20 0 64 –10 –20 0 60 –30 0 1 2 3 4 5 6 0 1 2 3 4 5 0 0.5 1 1.5 2 2.5 VRUN/SS (V) COMMON MODE VOLTAGE (V) VITH (V) 3728 G10 3728 G11 3728 G12
Load Regulation VITH vs VRUN/SS SENSE Pins Total Source Current
0.0 2.5 100 FCB = 0V VOSENSE = 0.7V VIN = 15V 2.0 –0.1 50 (%) OUT 1.5 A) μ (V) ( –0.2 0 ITHV 1.0 I SENSE NORMALIZED V –0.3 –50 0.5 –0.4 0 –100 0 1 2 3 4 5 0 1 2 3 4 5 6 0 2 4 6 LOAD CURRENT (A) VRUN/SS (V) VSENSE COMMON MODE VOLTAGE (V) 3728 G13 3728 G14 3728 G15
Maximum Current Sense Dropout Voltage vs Output Current Threshold vs Temperature (Figure 14) RUN/SS Current vs Temperature
80 4 1.8 VOUT = 5V 1.6 78 3 1.4 A) μ 1.2 76 (mV) 1.0 2 0.8 SENSEV 74 RSENSE = 0.015Ω 0.6 DROPOUT VOLTAGE (V) 1 RUN/SS CURRENT ( 72 0.4 RSENSE = 0.010Ω 0.2 70 0 0 –50 –25 0 25 50 75 100 125 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) OUTPUT CURRENT (A) TEMPERATURE (°C) 3728 G17 3728 G18 3728 G25 3728fg 6
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Threshold Maximum Current Sense Threshold Current Sense Threshold vs VRUN/SS (Soft-Start) vs Sense Common Mode Voltage vs ITH Voltage
80 80 90 VSENSE(CM) = 1.6V 80 70 76 60 60 50 72 40 (mV) (mV) (mV) 40 30 SENSE SENSE 20 V SENSEV 68 V 10 20 0 64 –10 –20 0 60 –30 0 1 2 3 4 5 6 0 1 2 3 4 5 0 0.5 1 1.5 2 2.5 VRUN/SS (V) COMMON MODE VOLTAGE (V) VITH (V) 3728 G10 3728 G11 3728 G12
Load Regulation VITH vs VRUN/SS SENSE Pins Total Source Current
0.0 2.5 100 FCB = 0V VOSENSE = 0.7V VIN = 15V 2.0 –0.1 50 (%) OUT 1.5 A) μ (V) ( –0.2 0 ITHV 1.0 I SENSE NORMALIZED V –0.3 –50 0.5 –0.4 0 –100 0 1 2 3 4 5 0 1 2 3 4 5 6 0 2 4 6 LOAD CURRENT (A) VRUN/SS (V) VSENSE COMMON MODE VOLTAGE (V) 3728 G13 3728 G14 3728 G15
Maximum Current Sense Dropout Voltage vs Output Current Threshold vs Temperature (Figure 14) RUN/SS Current vs Temperature
80 4 1.8 VOUT = 5V 1.6 78 3 1.4 A) μ 1.2 76 (mV) 1.0 2 0.8 SENSEV 74 RSENSE = 0.015Ω 0.6 DROPOUT VOLTAGE (V) 1 RUN/SS CURRENT ( 72 0.4 RSENSE = 0.010Ω 0.2 70 0 0 –50 –25 0 25 50 75 100 125 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) OUTPUT CURRENT (A) TEMPERATURE (°C) 3728 G17 3728 G18 3728 G25 3728fg 6