Datasheet LT3641 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer |
| 页数 / 页 | 28 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 452 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switching Frequency. HV Channel Current Limit
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LT3641
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switching Frequency HV Channel Current Limit FB2 Voltage vs SS2 vs Temperature vs Duty Cycle
700 0.52 2.5 RT = 182k 600 2.0 0.51 500 1.5 400 TAGE (mV) 0.50 300 1.0 FB2 VOL 200 0.49 SWITCHING FREQUENCY (MHz) SW1 PEAK CURRENT LIMIT (A) 0.5 100 0 0.48 0.0 0 200 400 6000 800 1000 –50 0 50 100 150 0 20 40 60 80 100 SS2 VOLTAGE (mV) TEMPERATURE (°C) DUTY CYCLE (%) 3641 G10 3641 G11 3641 G12
LV Channel Peak Current Limit LV Channel Switch Voltage VOUT1 Minimum Load to Run at vs Duty Cycle Drop vs Current (V Full Frequency (V IN2 = 3.3V) OUT1 = 3.3V)
2.0 450 0.45 400 0.40 350 0.35 1.5 300 0.30 PMOS 2.5MHz 250 0.25 2MHz 1.0 TAGE DROP (mV) 200 CURRENT (A) 0.20 NMOS 150 OUT1 0.15 V 0.5 SW2 VOL 100 0.10 SW2 PEAK CURRENT LIMIT (A) 50 0.05 0.0 0 0 0 20 40 60 80 100 0 0.5 1 1.5 0 5 10 15 20 25 30 DUTY CYCLE (%) SW2 CURRENT (A) VIN VOLTAGE (V) 3641 G13 3641 G14 3641 G15
HV Channel Switching Frequency LV Channel Switching Frequency (VOUT1 = 3.3V) (VOUT2 = 1.8V) EN2 Current vs Voltage
2.5 2.5 30 RT = 32.4k VIN = 12V VIN2 = 3.3V 25 2.0 2.0 20 1.5 1.5 VIN = 16V VIN2 = 5V 15 1.0 1.0 VIN = 24V EN2 CURRENT (μA) 10 0.5 SWITCHING FREQUENCY (MHz) 0.5 SWITCHING FREQUENCY (MHz) 5 0 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 VOUT1 CURRENT (A) VOUT2 CURRENT (A) EN2 VOLTAGE (V) 3641 G16 3641 G17 3641 G17a 3641fa 6
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switching Frequency HV Channel Current Limit FB2 Voltage vs SS2 vs Temperature vs Duty Cycle
700 0.52 2.5 RT = 182k 600 2.0 0.51 500 1.5 400 TAGE (mV) 0.50 300 1.0 FB2 VOL 200 0.49 SWITCHING FREQUENCY (MHz) SW1 PEAK CURRENT LIMIT (A) 0.5 100 0 0.48 0.0 0 200 400 6000 800 1000 –50 0 50 100 150 0 20 40 60 80 100 SS2 VOLTAGE (mV) TEMPERATURE (°C) DUTY CYCLE (%) 3641 G10 3641 G11 3641 G12
LV Channel Peak Current Limit LV Channel Switch Voltage VOUT1 Minimum Load to Run at vs Duty Cycle Drop vs Current (V Full Frequency (V IN2 = 3.3V) OUT1 = 3.3V)
2.0 450 0.45 400 0.40 350 0.35 1.5 300 0.30 PMOS 2.5MHz 250 0.25 2MHz 1.0 TAGE DROP (mV) 200 CURRENT (A) 0.20 NMOS 150 OUT1 0.15 V 0.5 SW2 VOL 100 0.10 SW2 PEAK CURRENT LIMIT (A) 50 0.05 0.0 0 0 0 20 40 60 80 100 0 0.5 1 1.5 0 5 10 15 20 25 30 DUTY CYCLE (%) SW2 CURRENT (A) VIN VOLTAGE (V) 3641 G13 3641 G14 3641 G15
HV Channel Switching Frequency LV Channel Switching Frequency (VOUT1 = 3.3V) (VOUT2 = 1.8V) EN2 Current vs Voltage
2.5 2.5 30 RT = 32.4k VIN = 12V VIN2 = 3.3V 25 2.0 2.0 20 1.5 1.5 VIN = 16V VIN2 = 5V 15 1.0 1.0 VIN = 24V EN2 CURRENT (μA) 10 0.5 SWITCHING FREQUENCY (MHz) 0.5 SWITCHING FREQUENCY (MHz) 5 0 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 VOUT1 CURRENT (A) VOUT2 CURRENT (A) EN2 VOLTAGE (V) 3641 G16 3641 G17 3641 G17a 3641fa 6