Datasheet LT3690 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator with 70μA Quiescent Current |
| 页数 / 页 | 30 / 8 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 1.2 Mb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Switching Frequency. Minimum Switch On-Time
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LT3690
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Switching Frequency Minimum Switch On-Time Soft-Start Pin Current vs Temperature vs Temperature vs Temperature
650 240 –1.2 RT = 32.4k –1.4 200 630 –1.6 160 610 –1.8 120 –2.0 590 T PIN CURRENT (µA) –2.2 FREQUENCY (kHz) 80 AR T-ST –2.4 570 MINIMUM SWITCH ON-TIME (ns) 40 SOF –2.6 550 0 –2.8 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3690 G26 3690 G27 3690 G28
VCCINT vs VIN VVCCINT Current Limit VCCINT Pin Voltage
5 0 5 4 –10 4 TAGE (V) 3 –20 TAGE (V) 3 PIN VOL 2 PIN CURRENT (mA) –30 PIN VOL 2 V CCINT V CCINT 1 V CCINT –40 1 0 –50 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 –50 –25 0 25 50 75 100 125 150 VIN PIN VOLTAGE (V) VCCINT PIN VOLTAGE (V) TEMPERATURE (°C) 3690 G29 3690 G30 3690 G31
Switching Waveforms, Transition Switching Waveforms, from Burst Mode Operation to Full Switching Waveforms, Full Burst Mode Operation Frequency Frequency Continuous Operation
VSW V 5V/DIV VSW SW 5V/DIV 5V/DIV I IL I L L 0.5A/DIV 1A/DIV 0.5A/DIV V V V OUT OUT OUT 10mV/DIV 10mV/DIV 10mV/DIV 5µs/DIV 3690 G32 1µs/DIV 3690 G33 1µs/DIV 3690 G34 VIN = 12V, ILOAD = 20mA VIN = 12V, ILOAD = 200mA VIN = 12V, ILOAD = 2A FRONT PAGE APPLICATION FRONT PAGE APPLICATION FRONT PAGE APPLICATION 3690fb 8 For more information www.linear.com/LT3690 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. Switching Frequency Minimum Switch On-Time Soft-Start Pin Current vs Temperature vs Temperature vs Temperature
650 240 –1.2 RT = 32.4k –1.4 200 630 –1.6 160 610 –1.8 120 –2.0 590 T PIN CURRENT (µA) –2.2 FREQUENCY (kHz) 80 AR T-ST –2.4 570 MINIMUM SWITCH ON-TIME (ns) 40 SOF –2.6 550 0 –2.8 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3690 G26 3690 G27 3690 G28
VCCINT vs VIN VVCCINT Current Limit VCCINT Pin Voltage
5 0 5 4 –10 4 TAGE (V) 3 –20 TAGE (V) 3 PIN VOL 2 PIN CURRENT (mA) –30 PIN VOL 2 V CCINT V CCINT 1 V CCINT –40 1 0 –50 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 –50 –25 0 25 50 75 100 125 150 VIN PIN VOLTAGE (V) VCCINT PIN VOLTAGE (V) TEMPERATURE (°C) 3690 G29 3690 G30 3690 G31
Switching Waveforms, Transition Switching Waveforms, from Burst Mode Operation to Full Switching Waveforms, Full Burst Mode Operation Frequency Frequency Continuous Operation
VSW V 5V/DIV VSW SW 5V/DIV 5V/DIV I IL I L L 0.5A/DIV 1A/DIV 0.5A/DIV V V V OUT OUT OUT 10mV/DIV 10mV/DIV 10mV/DIV 5µs/DIV 3690 G32 1µs/DIV 3690 G33 1µs/DIV 3690 G34 VIN = 12V, ILOAD = 20mA VIN = 12V, ILOAD = 200mA VIN = 12V, ILOAD = 2A FRONT PAGE APPLICATION FRONT PAGE APPLICATION FRONT PAGE APPLICATION 3690fb 8 For more information www.linear.com/LT3690 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