Datasheet LTC1701, LTC1701B (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 1MHz Step-Down DC/DC Converter in SOT-23 |
| 页数 / 页 | 12 / 3 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. … |
| 文件格式/大小 | PDF / 188 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. Efficiency vs Input Voltage. DC Supply Current
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LTC1701/LTC1701B
W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Input Voltage DC Supply Current
100 100 300 VOUT = 2.5V VOUT = 2.5V V 95 95 IN = 3.3V ILOAD =100mA 250 90 µA) 90 200 ACTIVE V 85 IN = 5.0V ILOAD =10mA 85 80 150 SLEEP EFFICIENCY (%) 75 80 EFFICIENCY (%) 100 70 SUPPLY CURRENT ( 75 50 LTC1701 65 LTC1701 LTC1701B LTC1701B 70 60 0 1 10 100 1000 2 3 4 5 6 2 3 4 5 6 LOAD CURRENT (mA) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1701 • G01 1701 • G02 1701 • G03
Switch Resistance vs Supply Voltage Load Regulation Line Regulation
370 0.60 0.30 0.40 350 0.25 0.20 VOUT = 5.0V ) ILOAD = 200mA Ω 0.00 330 0.20 –0.20 310 –0.40 0.15 ERROR (%) ERROR (%) –0.60 VOUT = 3.3V OUT OUT 290 V V 0.10 ON RESISTANCE (m –0.80 ILOAD = 400mA –1.00 270 0.05 –1.20 250 –1.40 0 2 3 4 5 6 0 200 400 600 2 3 4 5 6 SUPPLY VOLTAGE (V) LOAD CURRENT (mA) VIN (V) 1701 • G04 1701 • G05 1701 • G06
Dropout Characteristics Start-Up Transient Response
3.4 3.3 ILOAD = 100mA VOUT VOUT 1V/DIV 3.2 50mV/DIV AC COUPLED 3.1 I (V) LOAD = 200mA 3.0 I OUT TH V 2V/DIV IL 2.9 200mA/DIV ILOAD = 500mA IL 2.8 500mA/DIV 2.7 VOUT = 3.3V FIGURE 1 2.6 3.0 3.2 3.4 3.6 3.8 V V IN = 3.3V, VOUT = 2.5V IN = 3.3V, VOUT = 2.5V V CIRCUIT OF FIGURE 1 CIRCUIT OF FIGURE 1 IN (V) R I LOAD = 6Ω LOAD = 100mA TO 500mA STEP 701 • G07 1701 G08 1701 G09 3
W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Input Voltage DC Supply Current
100 100 300 VOUT = 2.5V VOUT = 2.5V V 95 95 IN = 3.3V ILOAD =100mA 250 90 µA) 90 200 ACTIVE V 85 IN = 5.0V ILOAD =10mA 85 80 150 SLEEP EFFICIENCY (%) 75 80 EFFICIENCY (%) 100 70 SUPPLY CURRENT ( 75 50 LTC1701 65 LTC1701 LTC1701B LTC1701B 70 60 0 1 10 100 1000 2 3 4 5 6 2 3 4 5 6 LOAD CURRENT (mA) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1701 • G01 1701 • G02 1701 • G03
Switch Resistance vs Supply Voltage Load Regulation Line Regulation
370 0.60 0.30 0.40 350 0.25 0.20 VOUT = 5.0V ) ILOAD = 200mA Ω 0.00 330 0.20 –0.20 310 –0.40 0.15 ERROR (%) ERROR (%) –0.60 VOUT = 3.3V OUT OUT 290 V V 0.10 ON RESISTANCE (m –0.80 ILOAD = 400mA –1.00 270 0.05 –1.20 250 –1.40 0 2 3 4 5 6 0 200 400 600 2 3 4 5 6 SUPPLY VOLTAGE (V) LOAD CURRENT (mA) VIN (V) 1701 • G04 1701 • G05 1701 • G06
Dropout Characteristics Start-Up Transient Response
3.4 3.3 ILOAD = 100mA VOUT VOUT 1V/DIV 3.2 50mV/DIV AC COUPLED 3.1 I (V) LOAD = 200mA 3.0 I OUT TH V 2V/DIV IL 2.9 200mA/DIV ILOAD = 500mA IL 2.8 500mA/DIV 2.7 VOUT = 3.3V FIGURE 1 2.6 3.0 3.2 3.4 3.6 3.8 V V IN = 3.3V, VOUT = 2.5V IN = 3.3V, VOUT = 2.5V V CIRCUIT OF FIGURE 1 CIRCUIT OF FIGURE 1 IN (V) R I LOAD = 6Ω LOAD = 100mA TO 500mA STEP 701 • G07 1701 G08 1701 G09 3