Datasheet LT8711 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Micropower Synchronous Multitopology Controller with 42V Input Capability |
| 页数 / 页 | 38 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 1.1 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency vs. DCM Thresholds (ISP–ISN)
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LT8711
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency vs DCM Thresholds (ISP–ISN) Temperature BG Transition Time vs Cap Load
5.0 800 60 4.5 700 R 50 4.0 T = 30.3kΩ 600 3.5 VISN = 0V 40 RISING 3.0 500 2.5 (kHz) 400 30 VISN = 12V 2.0 F OSC ISP -ISN (mV) 300 20 1.5 FALLING 200 BG TRANSITION TIME (ns) 1.0 RT = 247kΩ 10 0.5 100 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 10 TEMPERATURE (°C) TEMPERATURE (°C) CAP LOAD (nF) 8711 G10 8711 G11 8711 G12
TG Transition Time vs Cap Load Minimum Operating Input Voltage INTVCC vs Temperature
60 4.5 5.20 I 4.4 INTVCC = 10mA 5.15 50 4.3 RISING 5.10 4.2 40 RISING (V) 4.1 5.05 VCC (V) 30 EXT 4.0 CC 5.00 3.9 OR V INTV 4.95 20 FALLING V IN 3.8 TG TRANSITION TIME (ns) FALLING 4.90 3.7 10 3.6 4.85 0 3.5 4.80 0 1 2 3 4 5 6 7 8 9 10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 CAP LOAD (nF) TEMPERATURE (°C) TEMPERATURE (°C) 8711 G13 8711 G14 8711 G15
INTVCC Current Limit vs INTVCC Dropout from INTVCC UVLO vs Temperature VIN or EXTVCC VIN or EXTVCC
4.2 70 0.40 4.1 60 0.35 RISING 0.30 4.0 50 (V) V CC 0.25 3.9 (V) 40 V CC 0.20 3.8 INT 30 CURRENT LIMIT (mA) 0.15 3.7 20 V CC 0.10 FALLING INT POWER INPUT - INT 3.6 10 0.05 3.5 0 0 –50 –25 0 25 50 75 100 125 5 10 15 20 25 30 35 40 0 10 20 30 40 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 8711 G16 8711 G17 8711 G18 Rev A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Start-Up and Fault Sequence Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Oscillator Frequency vs DCM Thresholds (ISP–ISN) Temperature BG Transition Time vs Cap Load
5.0 800 60 4.5 700 R 50 4.0 T = 30.3kΩ 600 3.5 VISN = 0V 40 RISING 3.0 500 2.5 (kHz) 400 30 VISN = 12V 2.0 F OSC ISP -ISN (mV) 300 20 1.5 FALLING 200 BG TRANSITION TIME (ns) 1.0 RT = 247kΩ 10 0.5 100 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 10 TEMPERATURE (°C) TEMPERATURE (°C) CAP LOAD (nF) 8711 G10 8711 G11 8711 G12
TG Transition Time vs Cap Load Minimum Operating Input Voltage INTVCC vs Temperature
60 4.5 5.20 I 4.4 INTVCC = 10mA 5.15 50 4.3 RISING 5.10 4.2 40 RISING (V) 4.1 5.05 VCC (V) 30 EXT 4.0 CC 5.00 3.9 OR V INTV 4.95 20 FALLING V IN 3.8 TG TRANSITION TIME (ns) FALLING 4.90 3.7 10 3.6 4.85 0 3.5 4.80 0 1 2 3 4 5 6 7 8 9 10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 CAP LOAD (nF) TEMPERATURE (°C) TEMPERATURE (°C) 8711 G13 8711 G14 8711 G15
INTVCC Current Limit vs INTVCC Dropout from INTVCC UVLO vs Temperature VIN or EXTVCC VIN or EXTVCC
4.2 70 0.40 4.1 60 0.35 RISING 0.30 4.0 50 (V) V CC 0.25 3.9 (V) 40 V CC 0.20 3.8 INT 30 CURRENT LIMIT (mA) 0.15 3.7 20 V CC 0.10 FALLING INT POWER INPUT - INT 3.6 10 0.05 3.5 0 0 –50 –25 0 25 50 75 100 125 5 10 15 20 25 30 35 40 0 10 20 30 40 TEMPERATURE (°C) INPUT VOLTAGE (V) INTVCC LOAD CURRENT (mA) 8711 G16 8711 G17 8711 G18 Rev A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Start-Up and Fault Sequence Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts