Datasheet LTC3458 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| 页数 / 页 | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise … |
| 文件格式/大小 | PDF / 320 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25. C unless otherwise specified). Frequency Accuracy. Efficiency vs Frequency
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LTC3458
W U TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25
°
C unless otherwise specified) Frequency Accuracy Efficiency vs Frequency N-Channel and P-Channel RDS(ON)
1.05 95 0.5 RT = 200k VIN = 3.3V VIN = 3.3V VOUT = 5V at 100mA VOUT = 5V 1.03 93 0.4 P-CHANNEL ) 1.01 91 Ω 0.3 ( N-CHANNEL 89 DS(ON) 0.99 R 0.2 EFFICIENCY (%) FREQUENCY (MHz) 0.97 87 0.1 0.95 85 0 –45 –30 –15 0 15 30 45 60 75 90 500 700 900 1100 1300 1500 –40 –15 10 35 60 85 TEMPERATURE (°C) FREQUENCY (kHz) TEMPERATURE (°C) 3458 G07 3458 G08 3458 G09
SHDN Pin Threshold and Maximum Load Current Hysteresis SYNC Pin Threshold
1200 1.0 1.5 1.8 to 5.5VIN at 700kHz R 5V ILIM = 124k OUT 1.4 1000 0.9 1.3 800 3.3VOUT OPERATING 0.8 1.2 600 7.5VOUT 1.1 VOLTAGE (V) 0.7 VOLTAGE (V) 400 SHUTDOWN 1.0 MAX LOAD CURRENT (mA) 0.6 200 0.9 0 0.5 0.8 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3458 G11 3458 G12 3458 G10
FB Voltage
1.25 1.24 1.23 VOLTAGE (V) 1.22 1.21 1.20 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) 3458 G13 3458fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS (TA = 25
°
C unless otherwise specified) Frequency Accuracy Efficiency vs Frequency N-Channel and P-Channel RDS(ON)
1.05 95 0.5 RT = 200k VIN = 3.3V VIN = 3.3V VOUT = 5V at 100mA VOUT = 5V 1.03 93 0.4 P-CHANNEL ) 1.01 91 Ω 0.3 ( N-CHANNEL 89 DS(ON) 0.99 R 0.2 EFFICIENCY (%) FREQUENCY (MHz) 0.97 87 0.1 0.95 85 0 –45 –30 –15 0 15 30 45 60 75 90 500 700 900 1100 1300 1500 –40 –15 10 35 60 85 TEMPERATURE (°C) FREQUENCY (kHz) TEMPERATURE (°C) 3458 G07 3458 G08 3458 G09
SHDN Pin Threshold and Maximum Load Current Hysteresis SYNC Pin Threshold
1200 1.0 1.5 1.8 to 5.5VIN at 700kHz R 5V ILIM = 124k OUT 1.4 1000 0.9 1.3 800 3.3VOUT OPERATING 0.8 1.2 600 7.5VOUT 1.1 VOLTAGE (V) 0.7 VOLTAGE (V) 400 SHUTDOWN 1.0 MAX LOAD CURRENT (mA) 0.6 200 0.9 0 0.5 0.8 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –45 –30 –15 0 15 30 45 60 75 90 –45 –30 –15 0 15 30 45 60 75 90 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3458 G11 3458 G12 3458 G10
FB Voltage
1.25 1.24 1.23 VOLTAGE (V) 1.22 1.21 1.20 –45 –30 –15 0 15 30 45 60 75 90 TEMPERATURE (°C) 3458 G13 3458fa 4