Datasheet LTC3619B (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 400mA/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 / 519 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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LTC3619B
Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise noted. Pulse-Skipping Mode Operation Supply Current vs Temperature Efficiency vs Input Voltage
900 100 SW RUN1 = RUN2 = VIN I 90 2V/DIV 800 LOAD = 0A VIN = 5.5V 80 VOUT 700 70 50mV/DIV AC- 60 600 V COUPLED IN = 2.7V 50 Y CURRENT (µA) 500 40 IOUT = 100mA IOUT = 10mA I EFFICIENCY (%) IOUT = 400mA I L 30 OUT = 1mA 100mA/DIV 400 I SUPPL OUT = 800mA IOUT = 0.1mA 20 3619B G01 5µs/DIV 300 V V IN = 5V 10 OUT = 3.3V V CHANNEL 2 OUT = 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) 3619B G02 3619B G03
Oscillator Frequency Regulated Voltage vs Temperature vs Temperature Switch Leakage vs Input Voltage
1.5 2.5 1000 CHANNEL 1 CHANNEL 2 1.0 2.4 800 2.3 0.5 2.2 600 0 MAIN SWITCH ERROR (%) 2.1 400 V FB –0.5 SYNCHRONOUS SWITCH FREQUENCY (MHz) 2.0 V LEAKAGE CURRENT (pA) IN = 2.7V –1.0 200 1.9 VIN = 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) 3619B G04 3619B G05 3619B G06
Switch On-Resistance Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature, Channel 1 vs Temperature, Channel 2
0.7 0.5 0.7 CHANNEL 1 VIN = 2.7V VIN = 2.7V 650 CHANNEL 2 VIN = 3.6V V MAIN SWITCH IN = 3.6V 0.4 V 0.6 0.6 VIN = 5V IN = 5V MAIN SWITCH NFET R 550 0.3 0.5 0.5 (Ω) (mΩ) MAIN SWITCH (Ω) DS(ON) DS(ON) 0.2 0.4 450 (Ω) R DS(ON) R DS(ON) 0.4 PFET R 0.1 0.3 350 0.3 0 0.2 SYNCHRONOUS SWITCH SYNCHRONOUS SWITCH SYNCHRONOUS SWITCH 250 0.2 –0.1 0.1 2.5 3 3.5 4 4.5 5 5.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3619B G07 3619B G08 3619B G09 3619bfb 4 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise noted. Pulse-Skipping Mode Operation Supply Current vs Temperature Efficiency vs Input Voltage
900 100 SW RUN1 = RUN2 = VIN I 90 2V/DIV 800 LOAD = 0A VIN = 5.5V 80 VOUT 700 70 50mV/DIV AC- 60 600 V COUPLED IN = 2.7V 50 Y CURRENT (µA) 500 40 IOUT = 100mA IOUT = 10mA I EFFICIENCY (%) IOUT = 400mA I L 30 OUT = 1mA 100mA/DIV 400 I SUPPL OUT = 800mA IOUT = 0.1mA 20 3619B G01 5µs/DIV 300 V V IN = 5V 10 OUT = 3.3V V CHANNEL 2 OUT = 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) 3619B G02 3619B G03
Oscillator Frequency Regulated Voltage vs Temperature vs Temperature Switch Leakage vs Input Voltage
1.5 2.5 1000 CHANNEL 1 CHANNEL 2 1.0 2.4 800 2.3 0.5 2.2 600 0 MAIN SWITCH ERROR (%) 2.1 400 V FB –0.5 SYNCHRONOUS SWITCH FREQUENCY (MHz) 2.0 V LEAKAGE CURRENT (pA) IN = 2.7V –1.0 200 1.9 VIN = 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) 3619B G04 3619B G05 3619B G06
Switch On-Resistance Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature, Channel 1 vs Temperature, Channel 2
0.7 0.5 0.7 CHANNEL 1 VIN = 2.7V VIN = 2.7V 650 CHANNEL 2 VIN = 3.6V V MAIN SWITCH IN = 3.6V 0.4 V 0.6 0.6 VIN = 5V IN = 5V MAIN SWITCH NFET R 550 0.3 0.5 0.5 (Ω) (mΩ) MAIN SWITCH (Ω) DS(ON) DS(ON) 0.2 0.4 450 (Ω) R DS(ON) R DS(ON) 0.4 PFET R 0.1 0.3 350 0.3 0 0.2 SYNCHRONOUS SWITCH SYNCHRONOUS SWITCH SYNCHRONOUS SWITCH 250 0.2 –0.1 0.1 2.5 3 3.5 4 4.5 5 5.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3619B G07 3619B G08 3619B G09 3619bfb 4 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts