Datasheet LTC3408 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| 页数 / 页 | 12 / 3 — ELECTRICAL CHARACTERISTICS. Note 4:. Note 5:. TYPICAL PERFOR A CE … |
| 文件格式/大小 | PDF / 165 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. Note 4:. Note 5:. TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1). Efficiency vs VOUT
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LTC3408
ELECTRICAL CHARACTERISTICS Note 4:
When VREF > 1.2V and VREF x3 > VIN, the P-channel FET will be on temperature will exceed 125°C when overtemperature protection is active. in parallel with the bypass PFET reducing the overall RDS(ON). Continuous operation above the specified maximum operating junction
Note 5:
This IC includes overtemperature protection that is intended to temperature may impair device reliability. protect the device during momentary overload conditions. Junction
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1) Efficiency vs VOUT Efficiency vs Output Current Efficiency vs Output Current
110 100 100 TA = 25°C TA = 25°C TA = 25°C VIN = 3.6V 90 VOUT = 1.2V 90 VOUT = 1.5V 100 80 80 100mA 70 70 90 VIN = 3.6V VIN = 3.6V 60 600mA 60 VIN = 4.2V VIN = 4.2V 80 50 50 40 40 EFFICIENCY (%) 70 EFFICIENCY (%) EFFICIENCY (%) 30 30 20 20 60 10 10 50 0 0 0 1 2 3 4 0.1 1 10 100 1000 0.1 1 10 100 1000 VOUT (V) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3408 G02 3408 G03 3408 G04
Oscillator Frequency Oscillator Frequency Efficiency vs Output Current vs Temperature vs Supply Voltage
100 1.70 1.8 T T A = 25°C VIN = 3.6V A = 25°C 90 VOUT = 2.5V 1.65 1.7 80 1.60 70 V 1.6 IN = 3.6V 1.55 60 VIN = 4.2V 50 1.50 1.5 40 1.45 EFFICIENCY (%) 1.4 30 FREQUENCY (MHz) 1.40 20 OSCILLATOR FREQUENCY (MHz) 1.3 1.35 10 0 1.30 1.2 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 2 3 4 5 6 OUTPUT CURRENT (mA) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3408 G07 3408 G05 3408 G06 3408f 3
ELECTRICAL CHARACTERISTICS Note 4:
When VREF > 1.2V and VREF x3 > VIN, the P-channel FET will be on temperature will exceed 125°C when overtemperature protection is active. in parallel with the bypass PFET reducing the overall RDS(ON). Continuous operation above the specified maximum operating junction
Note 5:
This IC includes overtemperature protection that is intended to temperature may impair device reliability. protect the device during momentary overload conditions. Junction
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1) Efficiency vs VOUT Efficiency vs Output Current Efficiency vs Output Current
110 100 100 TA = 25°C TA = 25°C TA = 25°C VIN = 3.6V 90 VOUT = 1.2V 90 VOUT = 1.5V 100 80 80 100mA 70 70 90 VIN = 3.6V VIN = 3.6V 60 600mA 60 VIN = 4.2V VIN = 4.2V 80 50 50 40 40 EFFICIENCY (%) 70 EFFICIENCY (%) EFFICIENCY (%) 30 30 20 20 60 10 10 50 0 0 0 1 2 3 4 0.1 1 10 100 1000 0.1 1 10 100 1000 VOUT (V) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 3408 G02 3408 G03 3408 G04
Oscillator Frequency Oscillator Frequency Efficiency vs Output Current vs Temperature vs Supply Voltage
100 1.70 1.8 T T A = 25°C VIN = 3.6V A = 25°C 90 VOUT = 2.5V 1.65 1.7 80 1.60 70 V 1.6 IN = 3.6V 1.55 60 VIN = 4.2V 50 1.50 1.5 40 1.45 EFFICIENCY (%) 1.4 30 FREQUENCY (MHz) 1.40 20 OSCILLATOR FREQUENCY (MHz) 1.3 1.35 10 0 1.30 1.2 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 2 3 4 5 6 OUTPUT CURRENT (mA) TEMPERATURE (°C) SUPPLY VOLTAGE (V) 3408 G07 3408 G05 3408 G06 3408f 3