Datasheet LTC3606B (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 800mA Synchronous Step-Down DC/DC with Average Input Current Limit |
| 页数 / 页 | 20 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise … |
| 文件格式/大小 | PDF / 354 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Pulse-Skipping Mode Operation
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LTC3606B
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Pulse-Skipping Mode Operation Supply Current vs Temperature Effi ciency vs Input Voltage
550 100 RUN = V SW IN I 90 2V/DIV LOAD = 0A 500 V 80 IN = 5.5V V 450 OUT 70 50mV/DIV AC- 60 400 VIN = 2.7V COUPLED 50 Y CURRENT (μA) 350 40 I I OUT = 100mA OUT = 10mA I EFFICIENCY (%) I I OUT = 400mA OUT = 1mA L 30 100mA/DIV 300 I I OUT = 800mA OUT = 0.1mA SUPPL 20 3606B G01 5μs/DIV 250 V V IN = 5V 10 OUT = 3.3V VOUT = 3.3V I 200 0 LOAD = 5mA –50 –25 0 25 50 75 100 125 3.5 4 4.5 5 5.5 TEMPERATURE (°C) VIN (V) 3606B G02 3606B G03
Oscillator Frequency Regulated Voltage vs Temperature vs Temperature Switch Leakage vs Input Voltage
1.5 2.5 1000 1.0 2.4 800 2.3 0.5 600 2.2 0 MAIN SWITCH ERROR (%) 2.1 FB 400 V –0.5 FREQUENCY (MHz) 2.0 V LEAKAGE CURRENT (pA) IN = 2.7V 200 SYNCHRONOUS SWITCH –1.0 V 1.9 IN = 3.6V VIN = 4.2V VIN = 5V –1.5 1.8 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 2.5 3 3.5 4 4.5 5 5.5 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 3606B G04 3606B G05 3606B G06
Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature Effi ciency vs Load Current
600 0.5 0.7 100 VIN = 2.7V VOUT = 3.3V V MAIN SWITCH IN = 3.6V SYNCHRONOUS NFET R 90 0.4 V 0.6 IN = 5V 80 500 (Ω) 70 0.3 0.5 60 (mΩ) DS(ON) 400 0.2 0.4 50 DS(ON) 40 R DS(ON) MAIN SWITCH 0.1 0.3 EFFICIENCY (%) 30 300 MAIN PFET R (Ω) 20 0 0.2 VIN = 3.6V SYNCHRONOUS SWITCH 10 VIN = 4.2V SYNCHRONOUS SWITCH VIN = 5V 200 –0.1 0.1 0 2.5 3 3.5 4 4.5 5 5.5 –50 –25 0 25 50 75 100 125 0.0001 0.001 0.01 0.1 1 VIN (V) TEMPERATURE (°C) OUTPUT CURRENT (A) 3606B G07 3606B G09 3606B G11 3606bfb 4
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Pulse-Skipping Mode Operation Supply Current vs Temperature Effi ciency vs Input Voltage
550 100 RUN = V SW IN I 90 2V/DIV LOAD = 0A 500 V 80 IN = 5.5V V 450 OUT 70 50mV/DIV AC- 60 400 VIN = 2.7V COUPLED 50 Y CURRENT (μA) 350 40 I I OUT = 100mA OUT = 10mA I EFFICIENCY (%) I I OUT = 400mA OUT = 1mA L 30 100mA/DIV 300 I I OUT = 800mA OUT = 0.1mA SUPPL 20 3606B G01 5μs/DIV 250 V V IN = 5V 10 OUT = 3.3V VOUT = 3.3V I 200 0 LOAD = 5mA –50 –25 0 25 50 75 100 125 3.5 4 4.5 5 5.5 TEMPERATURE (°C) VIN (V) 3606B G02 3606B G03
Oscillator Frequency Regulated Voltage vs Temperature vs Temperature Switch Leakage vs Input Voltage
1.5 2.5 1000 1.0 2.4 800 2.3 0.5 600 2.2 0 MAIN SWITCH ERROR (%) 2.1 FB 400 V –0.5 FREQUENCY (MHz) 2.0 V LEAKAGE CURRENT (pA) IN = 2.7V 200 SYNCHRONOUS SWITCH –1.0 V 1.9 IN = 3.6V VIN = 4.2V VIN = 5V –1.5 1.8 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 2.5 3 3.5 4 4.5 5 5.5 TEMPERATURE (°C) TEMPERATURE (°C) VIN (V) 3606B G04 3606B G05 3606B G06
Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature Effi ciency vs Load Current
600 0.5 0.7 100 VIN = 2.7V VOUT = 3.3V V MAIN SWITCH IN = 3.6V SYNCHRONOUS NFET R 90 0.4 V 0.6 IN = 5V 80 500 (Ω) 70 0.3 0.5 60 (mΩ) DS(ON) 400 0.2 0.4 50 DS(ON) 40 R DS(ON) MAIN SWITCH 0.1 0.3 EFFICIENCY (%) 30 300 MAIN PFET R (Ω) 20 0 0.2 VIN = 3.6V SYNCHRONOUS SWITCH 10 VIN = 4.2V SYNCHRONOUS SWITCH VIN = 5V 200 –0.1 0.1 0 2.5 3 3.5 4 4.5 5 5.5 –50 –25 0 25 50 75 100 125 0.0001 0.001 0.01 0.1 1 VIN (V) TEMPERATURE (°C) OUTPUT CURRENT (A) 3606B G07 3606B G09 3606B G11 3606bfb 4