Datasheet LTC3728L-1 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Dual, 550kHz, 2-Phase Synchronous Regulator |
| 页数 / 页 | 32 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Regulation. VITH vs VRUN/SS. … |
| 文件格式/大小 | PDF / 487 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Regulation. VITH vs VRUN/SS. SENSE Pins Total Source Current. Maximum Current Sense
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LTC3728L-1
TYPICAL PERFORMANCE CHARACTERISTICS Load Regulation VITH vs VRUN/SS SENSE Pins Total Source Current
0.0 2.5 100 FCB = 0V VOSENSE = 0.7V VIN = 15V FIGURE 13 2.0 –0.1 50 (%) OUT 1.5 (μA) –0.2 (V) 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) 3728L1 G13 3728L1 G14 3728L1 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 1.2 76 (mV) 1.0 2 0.8 SENSEV 74 RSENSE = 0.015Ω 0.6 DROPOUT VOLTAGE (V) 1 RUN/SS CURRENT (μA) 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) 3728L1 G17 3728L1 G18 3728L1 G25
Soft-Start Up (Figure 13) Load Step (Figure 13) Load Step (Figure 13)
VOUT VOUT VOUT 5V/DIV 200mV/DIV 200mV/DIV VRUN/SS 5V/DIV IL IL 2A/DIV 2A/DIV IL 2A/DIV 3728L1 G19 3728L1 G20 3728L1 G21 V 5ms/DIV IN = 15V V 20μs/DIV IN = 15V V 20μs/DIV IN = 15V VOUT = 5V VOUT = 5V VOUT = 5V VPLLFLTR = 50V VPLLFLTR = 50V LOAD STEP = 0A TO 3A LOAD STEP = 0A TO 3A Burst Mode OPERATION CONTINUOUS MODE 3728l1fc 6
TYPICAL PERFORMANCE CHARACTERISTICS Load Regulation VITH vs VRUN/SS SENSE Pins Total Source Current
0.0 2.5 100 FCB = 0V VOSENSE = 0.7V VIN = 15V FIGURE 13 2.0 –0.1 50 (%) OUT 1.5 (μA) –0.2 (V) 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) 3728L1 G13 3728L1 G14 3728L1 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 1.2 76 (mV) 1.0 2 0.8 SENSEV 74 RSENSE = 0.015Ω 0.6 DROPOUT VOLTAGE (V) 1 RUN/SS CURRENT (μA) 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) 3728L1 G17 3728L1 G18 3728L1 G25
Soft-Start Up (Figure 13) Load Step (Figure 13) Load Step (Figure 13)
VOUT VOUT VOUT 5V/DIV 200mV/DIV 200mV/DIV VRUN/SS 5V/DIV IL IL 2A/DIV 2A/DIV IL 2A/DIV 3728L1 G19 3728L1 G20 3728L1 G21 V 5ms/DIV IN = 15V V 20μs/DIV IN = 15V V 20μs/DIV IN = 15V VOUT = 5V VOUT = 5V VOUT = 5V VPLLFLTR = 50V VPLLFLTR = 50V LOAD STEP = 0A TO 3A LOAD STEP = 0A TO 3A Burst Mode OPERATION CONTINUOUS MODE 3728l1fc 6