Datasheet LTC3619 (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 | 22 / 4 — Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise … |
| 文件格式/大小 | PDF / 512 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise noted. Efficiency vs Input Voltage
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LTC3619
Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise noted. Efficiency vs Input Voltage Burst Mode Operation Supply Current vs Temperature (Channel 2)
100 100 I SW LOAD = 0 RUN1 = RUN2 = V 2V/DIV IN 90 80 VIN = 5V V 80 OUT 100mV/DIV AC- 60 70 COUPLED VIN = 2.7V 60 40 I EFFICIENCY (%) L 100mA/DIV SUPPLY CURRENT (µA) 50 IOUT = 1mA 20 I 3619 G01 OUT = 10mA 2µs/DIV 40 I V OUT = 100mA IN = 5V V I V OUT = 3.3V OUT = 800mA OUT = 3.3V 0 30 ILOAD = 25mA –50 –25 0 25 50 75 100 125 3.5 4 4.5 5 5.5 TEMPERATURE (°C) INPUT VOLTAGE (V) 3619 G02 3619 G02
Regulated Voltage Oscillator Frequency 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 FREQUENCY (MHz) SYNCHRONOUS SWITCH 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) 3619 G04 3619 G05 3619 G06
Switch On-Resistance Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature vs Temperature
0.65 0.8 0.5 0.7 CHANNEL 1 CHANNEL 1 CHANNEL 2 0.60 CHANNEL 2 (PFET) 0.7 MAIN SWITCH 0.4 0.6 MAIN SWITCH 0.55 NFET R 0.50 0.6 0.3 0.5 (Ω) (Ω) 0.45 (Ω) DS(ON) 0.5 DS(ON) 0.2 0.4 0.40 (NFET) R DS(ON) SYNCHRONOUS SWITCH (Ω) MAIN SWITCH R DS(ON) 0.35 0.4 PFET R 0.1 0.3 0.30 0.3 VIN = 2.7V 0 V 0.2 IN = 2.7V 0.25 SYNCHRONOUS SWITCH V VIN = 3.6V SYNCHRONOUS SWITCH IN = 3.6V V V 0.20 0.2 IN = 5V –0.1 IN = 5V 0.1 2.5 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3619 G07 3619 G08 3619 G09 3619fa 4 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Functional Diagram Operation Applications Information Package Description Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, VIN = 5V, unless otherwise noted. Efficiency vs Input Voltage Burst Mode Operation Supply Current vs Temperature (Channel 2)
100 100 I SW LOAD = 0 RUN1 = RUN2 = V 2V/DIV IN 90 80 VIN = 5V V 80 OUT 100mV/DIV AC- 60 70 COUPLED VIN = 2.7V 60 40 I EFFICIENCY (%) L 100mA/DIV SUPPLY CURRENT (µA) 50 IOUT = 1mA 20 I 3619 G01 OUT = 10mA 2µs/DIV 40 I V OUT = 100mA IN = 5V V I V OUT = 3.3V OUT = 800mA OUT = 3.3V 0 30 ILOAD = 25mA –50 –25 0 25 50 75 100 125 3.5 4 4.5 5 5.5 TEMPERATURE (°C) INPUT VOLTAGE (V) 3619 G02 3619 G02
Regulated Voltage Oscillator Frequency 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 FREQUENCY (MHz) SYNCHRONOUS SWITCH 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) 3619 G04 3619 G05 3619 G06
Switch On-Resistance Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature vs Temperature
0.65 0.8 0.5 0.7 CHANNEL 1 CHANNEL 1 CHANNEL 2 0.60 CHANNEL 2 (PFET) 0.7 MAIN SWITCH 0.4 0.6 MAIN SWITCH 0.55 NFET R 0.50 0.6 0.3 0.5 (Ω) (Ω) 0.45 (Ω) DS(ON) 0.5 DS(ON) 0.2 0.4 0.40 (NFET) R DS(ON) SYNCHRONOUS SWITCH (Ω) MAIN SWITCH R DS(ON) 0.35 0.4 PFET R 0.1 0.3 0.30 0.3 VIN = 2.7V 0 V 0.2 IN = 2.7V 0.25 SYNCHRONOUS SWITCH V VIN = 3.6V SYNCHRONOUS SWITCH IN = 3.6V V V 0.20 0.2 IN = 5V –0.1 IN = 5V 0.1 2.5 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3619 G07 3619 G08 3619 G09 3619fa 4 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Functional Diagram Operation Applications Information Package Description Typical Application Related Parts