Datasheet LTC3103 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 1.8μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter |
| 页数 / 页 | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 442 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Application No-Load Input Current
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LTC3103
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Application No-Load Input Current Peak Current Limit Change vs Temperature (Automatic Burst SW Leakage vs Temperature vs Temperature Mode Operation)
400 10.0 3.0 VIN = 10V VIN = 10V 350 7.5 2.8 VOUT = 2.5V 2.6 300 SYNCHRONOUS RECTIFIER 5.0 2.4 250 2.5 2.2 MAIN 200 SWITCH 0 2.0 150 –2.5 1.8 INPUT CURRENT (µA) 1.6 LEAKAGE CURRENT (nA) 100 –5.0 1.4 50 PEAK CURRENT LIMIT CHANGE (%) –7.5 1.2 0 –10.0 1.0 –50 –25 0 25 50 75 100 125 150 –50 –20 10 40 70 100 130 –50 –30 –10 10 30 50 70 90 110 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3103 G10 3103 G11 3103 G12
Start-Up into Pre-Biased Output Automatic Burst Mode Operation Forced Continuous Operation (Automatic Burst Mode Operation)
RUN 5V/DIV VOUT V COUT = 100µF 20mV/DIV OUT 1V/DIV VOUT AC-COUPLED VBST REFRESH SOFT-START 20mV/DIV CURRENT PULSES PERIOD PGOOD BURST CURRENT I 5V/DIV C L PULSES OUT = 47µF 100mA/DIV VOUT IL 20mV/DIV 100mA/DIV 1µs/DIV 3103 G14 ILOAD = 25mA 500µs/DIV 3103 G15 ILOAD = 2mA VIN = 10V VIN = 10V 3103 G13 CIN = 10µF CIN = 10µF V 50µs/DIV L = 10µH L = 10µH IN = 10V C V IN = 10µF OUT = 2.5V VOUT = 2.5V L = 10µH COUT = 22µF COUT = 47µF VOUT = 2.2V
Start-Up into Pre-Biased Output Start-Up from Shutdown Start-Up from Shutdown (Forced Continuous Operation) (Automatic Burst Mode Operation) (Forced Continuous Operation)
RUN RUN 5V/DIV 5V/DIV RUN VOUT PGOOD 5V/DIV 1V/DIV 5V/DIV VOUT VOUT PGOOD 1V/DIV 1V/DIV 5V/DIV SOFT-START VBST REFRESH FOLDBACK PERIOD I IL I L L CURRENT PULSES 100mA/DIV 100mA/DIV 100mA/DIV 500µs/DIV 3103 G16 ILOAD = 2mA 500µs/DIV 3103 G17 ILOAD = 25mA 500µs/DIV 3103 G18 ILOAD = 5mA VIN = 10V VIN = 10V VIN = 10V L = 10µH L = 10µH L = 10µH VOUT = 2.5V VOUT = 2.5V VOUT = 2.5V 3103fa For more information www.linear.com/LTC3103 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Application No-Load Input Current Peak Current Limit Change vs Temperature (Automatic Burst SW Leakage vs Temperature vs Temperature Mode Operation)
400 10.0 3.0 VIN = 10V VIN = 10V 350 7.5 2.8 VOUT = 2.5V 2.6 300 SYNCHRONOUS RECTIFIER 5.0 2.4 250 2.5 2.2 MAIN 200 SWITCH 0 2.0 150 –2.5 1.8 INPUT CURRENT (µA) 1.6 LEAKAGE CURRENT (nA) 100 –5.0 1.4 50 PEAK CURRENT LIMIT CHANGE (%) –7.5 1.2 0 –10.0 1.0 –50 –25 0 25 50 75 100 125 150 –50 –20 10 40 70 100 130 –50 –30 –10 10 30 50 70 90 110 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3103 G10 3103 G11 3103 G12
Start-Up into Pre-Biased Output Automatic Burst Mode Operation Forced Continuous Operation (Automatic Burst Mode Operation)
RUN 5V/DIV VOUT V COUT = 100µF 20mV/DIV OUT 1V/DIV VOUT AC-COUPLED VBST REFRESH SOFT-START 20mV/DIV CURRENT PULSES PERIOD PGOOD BURST CURRENT I 5V/DIV C L PULSES OUT = 47µF 100mA/DIV VOUT IL 20mV/DIV 100mA/DIV 1µs/DIV 3103 G14 ILOAD = 25mA 500µs/DIV 3103 G15 ILOAD = 2mA VIN = 10V VIN = 10V 3103 G13 CIN = 10µF CIN = 10µF V 50µs/DIV L = 10µH L = 10µH IN = 10V C V IN = 10µF OUT = 2.5V VOUT = 2.5V L = 10µH COUT = 22µF COUT = 47µF VOUT = 2.2V
Start-Up into Pre-Biased Output Start-Up from Shutdown Start-Up from Shutdown (Forced Continuous Operation) (Automatic Burst Mode Operation) (Forced Continuous Operation)
RUN RUN 5V/DIV 5V/DIV RUN VOUT PGOOD 5V/DIV 1V/DIV 5V/DIV VOUT VOUT PGOOD 1V/DIV 1V/DIV 5V/DIV SOFT-START VBST REFRESH FOLDBACK PERIOD I IL I L L CURRENT PULSES 100mA/DIV 100mA/DIV 100mA/DIV 500µs/DIV 3103 G16 ILOAD = 2mA 500µs/DIV 3103 G17 ILOAD = 25mA 500µs/DIV 3103 G18 ILOAD = 5mA VIN = 10V VIN = 10V VIN = 10V L = 10µH L = 10µH L = 10µH VOUT = 2.5V VOUT = 2.5V VOUT = 2.5V 3103fa For more information www.linear.com/LTC3103 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts