Datasheet LT3680 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75µA Quiescent Current |
| 页数 / 页 | 24 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 修订版 | C |
| 文件格式/大小 | PDF / 526 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Error Amp Output Current. Minimum Input Voltage
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LT3680
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Error Amp Output Current Minimum Input Voltage Minimum Input Voltage
50 5.0 6.5 40 4.5 30 6.0 20 4.0 10 5.5 0 3.5 –10 5.0 PIN CURRENT (µA) 3.0 V C –20 INPUT VOLTAGE (V) INPUT VOLTAGE (V) V VOUT = 5V –30 OUT = 3.3V 2.5 T 4.5 A = 25°C TA = 25 °C –40 L = 4.7µH L = 4.7µH f = 800kHz f = 800kHz –50 2.0 4.0 –200 –100 0 100 200 1 10 100 1000 10000 1 10 100 1000 10000 FB PIN ERROR VOLTAGE (mV) LOAD CURRENT (mA) LOAD CURRENT (mA) 3680 G19 3680 G20 3680 G21
VC Voltages Power Good Threshold Switching Waveforms; Burst Mode
2.50 95 2.00 VSW CURRENT LIMIT CLAMP 90 5V/DIV 1.50 85 IL VOLTAGE (V) 1.00 0.2A/DIV V C SWITCHING THRESHOLD THRESHOLD VOLTAGE (%) 80 V 0.50 OUT 10mV/DIV 0 75 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN = 12V 5µs/DIV 3680 G24 TEMPERATURE (°C) V TEMPERATURE (°C) OUT = 3.3V ILOAD = 10mA 3680 G22 3680 G23
Switching Waveforms; Transition Switching Waveforms; Full from Burst Mode to Full Frequency Frequency Continuous Operation
VSW VSW 5V/DIV 5V/DIV IL IL 0.2A/DIV 0.5A/DIV VOUT V 10mV/DIV OUT 10mV/DIV 3680 G25 VIN = 12V 1µs/DIV 3680 G26 V 1µs/DIV V IN = 12V OUT = 3.3V V I OUT = 3.3V LOAD = 110mA ILOAD = 1A Rev C 6 For more information www.analog.com Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Error Amp Output Current Minimum Input Voltage Minimum Input Voltage
50 5.0 6.5 40 4.5 30 6.0 20 4.0 10 5.5 0 3.5 –10 5.0 PIN CURRENT (µA) 3.0 V C –20 INPUT VOLTAGE (V) INPUT VOLTAGE (V) V VOUT = 5V –30 OUT = 3.3V 2.5 T 4.5 A = 25°C TA = 25 °C –40 L = 4.7µH L = 4.7µH f = 800kHz f = 800kHz –50 2.0 4.0 –200 –100 0 100 200 1 10 100 1000 10000 1 10 100 1000 10000 FB PIN ERROR VOLTAGE (mV) LOAD CURRENT (mA) LOAD CURRENT (mA) 3680 G19 3680 G20 3680 G21
VC Voltages Power Good Threshold Switching Waveforms; Burst Mode
2.50 95 2.00 VSW CURRENT LIMIT CLAMP 90 5V/DIV 1.50 85 IL VOLTAGE (V) 1.00 0.2A/DIV V C SWITCHING THRESHOLD THRESHOLD VOLTAGE (%) 80 V 0.50 OUT 10mV/DIV 0 75 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VIN = 12V 5µs/DIV 3680 G24 TEMPERATURE (°C) V TEMPERATURE (°C) OUT = 3.3V ILOAD = 10mA 3680 G22 3680 G23
Switching Waveforms; Transition Switching Waveforms; Full from Burst Mode to Full Frequency Frequency Continuous Operation
VSW VSW 5V/DIV 5V/DIV IL IL 0.2A/DIV 0.5A/DIV VOUT V 10mV/DIV OUT 10mV/DIV 3680 G25 VIN = 12V 1µs/DIV 3680 G26 V 1µs/DIV V IN = 12V OUT = 3.3V V I OUT = 3.3V LOAD = 110mA ILOAD = 1A Rev C 6 For more information www.analog.com Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts