Datasheet LTC3407A-2 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Dual Synchronous 800mA, 2.25MHz Step-Down DC/DC Regulator |
| 页数 / 页 | 16 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise … |
| 文件格式/大小 | PDF / 281 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise specified. Reference Voltage vs Temperature
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LTC3407A-2
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise specified. Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V VIN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 ) 400 ) Ω MAIN Ω SWITCH (m 350 (m 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 REFERENCE VOLTAGE (V) SYNCHRONOUS 200 SWITCH 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3407A2 G07 VIN (V) 3407A2 G08 TEMPERATURE (°C) 3407A2 G09
Efficiency vs Load Current Efficiency vs Load Current Load Regulation
100 100 4 2.7V 90 90 Burst Mode OPERATION 3 4.2V 80 3.3V 80 2 70 70 1 Burst Mode OPERATION 60 60 PULSE SKIP MODE 50 50 0 ERROR(%) PULSE SKIP MODE 40 40 OUT –1 EFFICIENCY (%) EFFICIENCY (%) V 30 30 –2 20 20 –3 10 V V VIN = 3.6V, VOUT = 1.8V OUT = 2.5V Burst Mode OPERATION 10 IN = 3.6V, VOUT = 1.8V CIRCUIT OF FIGURE 3 NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL 0 0 –4 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3407A2 G10 3407A2 G11 3407A2 G12
Efficiency vs Load Current Efficiency vs Load Current Line Regulation
100 100 0.5 3.3V VOUT = 1.8V 90 90 3.3V 0.4 2.7V IOUT = 200mA 2.7V 80 80 0.3 4.2V 70 70 4.2V 0.2 60 60 0.1 50 50 0 ERROR (%) 40 40 –0.1 EFFICIENCY (%) EFFICIENCY (%) OUTV 30 30 –0.2 20 20 –0.3 10 10 –0.4 V VOUT = 1.5V Burst Mode OPERATION OUT = 1.2V Burst Mode OPERATION 0 0 –0.5 1 10 100 1000 1 10 100 1000 2 3 4 5 6 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3407A2 G15 3407A2 G14 3407A2 G13 3407a2f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise specified. Reference Voltage vs Temperature RDS(ON) vs Input Voltage RDS(ON) vs Temperature
0.615 500 550 VIN = 3.6V VIN = 2.7V 500 0.610 450 VIN = 3.6V 450 VIN = 4.2V 0.605 400 ) 400 ) Ω MAIN Ω SWITCH (m 350 (m 0.600 350 300 DS(ON) DS(ON) R R 0.595 300 250 REFERENCE VOLTAGE (V) SYNCHRONOUS 200 SWITCH 0.590 250 150 MAIN SWITCH SYNCHRONOUS SWITCH 0.585 200 100 –50 –25 0 25 50 75 100 125 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3407A2 G07 VIN (V) 3407A2 G08 TEMPERATURE (°C) 3407A2 G09
Efficiency vs Load Current Efficiency vs Load Current Load Regulation
100 100 4 2.7V 90 90 Burst Mode OPERATION 3 4.2V 80 3.3V 80 2 70 70 1 Burst Mode OPERATION 60 60 PULSE SKIP MODE 50 50 0 ERROR(%) PULSE SKIP MODE 40 40 OUT –1 EFFICIENCY (%) EFFICIENCY (%) V 30 30 –2 20 20 –3 10 V V VIN = 3.6V, VOUT = 1.8V OUT = 2.5V Burst Mode OPERATION 10 IN = 3.6V, VOUT = 1.8V CIRCUIT OF FIGURE 3 NO LOAD ON OTHER CHANNEL NO LOAD ON OTHER CHANNEL 0 0 –4 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3407A2 G10 3407A2 G11 3407A2 G12
Efficiency vs Load Current Efficiency vs Load Current Line Regulation
100 100 0.5 3.3V VOUT = 1.8V 90 90 3.3V 0.4 2.7V IOUT = 200mA 2.7V 80 80 0.3 4.2V 70 70 4.2V 0.2 60 60 0.1 50 50 0 ERROR (%) 40 40 –0.1 EFFICIENCY (%) EFFICIENCY (%) OUTV 30 30 –0.2 20 20 –0.3 10 10 –0.4 V VOUT = 1.5V Burst Mode OPERATION OUT = 1.2V Burst Mode OPERATION 0 0 –0.5 1 10 100 1000 1 10 100 1000 2 3 4 5 6 LOAD CURRENT (mA) LOAD CURRENT (mA) VIN (V) 3407A2 G15 3407A2 G14 3407A2 G13 3407a2f 5