Datasheet LT8611 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | 42V, 2.5A Synchronous Step-Down Regulator with Current Sense and 2.5μA Quiescent Current |
| 页数 / 页 | 26 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. RT Programmed Switching. Frequency. … |
| 文件格式/大小 | PDF / 343 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. RT Programmed Switching. Frequency. VIN UVLO. Bias Pin Current. Switching Waveforms
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LT8611
TYPICAL PERFORMANCE CHARACTERISTICS RT Programmed Switching Frequency VIN UVLO Bias Pin Current
250 3.6 5.00 VBIAS = 5V 225 3.4 4.75 VOUT = 5V 200 ILOAD = 1A 3.2 4.50 fSW = 700kHz 175 150 3.0 4.25 125 2.8 4.00 100 2.6 3.75 RT PIN RESISTOR (kΩ) 75 INPUT VOLTAGE (V) 2.4 BIAS PIN CURRENT (mA) 3.50 50 25 2.2 3.25 0 2.0 3.00 0.2 0.6 1 1.4 1.8 2.2 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) INPUT VOLTAGE (V) 8611 G28 8611 G29 8611 G30
Bias Pin Current Switching Waveforms Switching Waveforms
12 VBIAS = 5V VOUT = 5V I I 10 L L VIN = 12V 1A/DIV 200mA/DIV ILOAD = 1A 8 VSW VSW 6 5V/DIV 5V/DIV 4 500ns/DIV 8611 G32 500µs/DIV 8611 G33 BIAS PIN CURRENT (mA) 12VIN TO 5VOUT AT 1A 12VIN TO 5VOUT AT 10mA 2 VSYNC = 0V 0 0 0.5 1 1.5 2 2.5 SWITCHING FREQUENCY (MHz) 8611 G31
Switching Waveforms Transient Response Transient Response
IL ILOAD 1A/DIV ILOAD 1A/DIV 1A/DIV V V V SW OUT OUT 10V/DIV 100mV/DIV 200mV/DIV 500ns/DIV 8611 G34 50µs/DIV 8611 G35 50µs/DIV 8611 G36 36VIN TO 5VOUT AT 1A 0.5A TO 1.5A TRANSIENT 0.5A TO 2.5A TRANSIENT 12VIN, 5VOUT 12VIN, 5VOUT COUT = 47µF COUT = 47µF 8611fa For more information www.linear.com/LT8611 7 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 Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS RT Programmed Switching Frequency VIN UVLO Bias Pin Current
250 3.6 5.00 VBIAS = 5V 225 3.4 4.75 VOUT = 5V 200 ILOAD = 1A 3.2 4.50 fSW = 700kHz 175 150 3.0 4.25 125 2.8 4.00 100 2.6 3.75 RT PIN RESISTOR (kΩ) 75 INPUT VOLTAGE (V) 2.4 BIAS PIN CURRENT (mA) 3.50 50 25 2.2 3.25 0 2.0 3.00 0.2 0.6 1 1.4 1.8 2.2 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) INPUT VOLTAGE (V) 8611 G28 8611 G29 8611 G30
Bias Pin Current Switching Waveforms Switching Waveforms
12 VBIAS = 5V VOUT = 5V I I 10 L L VIN = 12V 1A/DIV 200mA/DIV ILOAD = 1A 8 VSW VSW 6 5V/DIV 5V/DIV 4 500ns/DIV 8611 G32 500µs/DIV 8611 G33 BIAS PIN CURRENT (mA) 12VIN TO 5VOUT AT 1A 12VIN TO 5VOUT AT 10mA 2 VSYNC = 0V 0 0 0.5 1 1.5 2 2.5 SWITCHING FREQUENCY (MHz) 8611 G31
Switching Waveforms Transient Response Transient Response
IL ILOAD 1A/DIV ILOAD 1A/DIV 1A/DIV V V V SW OUT OUT 10V/DIV 100mV/DIV 200mV/DIV 500ns/DIV 8611 G34 50µs/DIV 8611 G35 50µs/DIV 8611 G36 36VIN TO 5VOUT AT 1A 0.5A TO 1.5A TRANSIENT 0.5A TO 2.5A TRANSIENT 12VIN, 5VOUT 12VIN, 5VOUT COUT = 47µF COUT = 47µF 8611fa For more information www.linear.com/LT8611 7 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 Typical Application Related Parts