Datasheet LT8337 (Analog Devices) - 5
| Производитель | Analog Devices |
| Описание | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru |
| Страниц / Страница | 25 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise … |
| Формат / Размер файла | PDF / 2.5 Мб |
| Язык документа | английский |
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. Efficiency vs Output Current at
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LT8337/LT8337-1
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. Efficiency vs Output Current at EN/UVLO Thresholds vs FB Regulation Voltage vs Different Switching Frequencies Temperature T Temperature
100 1.12 1.01 90 1.008 1.10 EN/UVLO RISING 80 1.006 70 1.08 1.004 TAGE (V) 60 1.06 1.002 50 1 TION VOL 1.04 40 0.998 EFFICIENCY (%) 30 FRONT PAGE CIRCUIT 1.02 0.996 VIN = 7.2V EN/UVLO THRESHOLD (V) FB REGULA 20 EN/UVLO FALLING 0.994 1MHz, L = 4.7μH 1.00 10 2MHz, L = 2.2μH 0.992 3MHz, L = 1.5μH 0 0.98 0.99 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 LOAD CURRENT (mA) TEMPERATURE (C°) TEMPERATURE (°C) 83371 G04 83371 G05 83371 G06
Oscillator Frequency vs Oscillator Frequency with Spread Temperature Spectrum Modulation Switching Waveforms, Soft-Start
2.1 2.5 RT = 47.5kΩ RT = 47.5kΩ 15V 2.08 SYNC/MODE = OPEN SYNC/MODE = INTVCC 2.4 VOUT 2.06 5V/DIV 2.04 2.3 2.02 2 2.2 EN/UVLO 1.98 2V/DIV TOR FREQUENCY (MHz) TOR FREQUENCY (MHz) 2.1 1.96 1ms/DIV 83371 G09 1.94 OSCILLA OSCILLA 2.0 VIN = 7.2V 1.92 FRONT PAGE CIRCUIT 1.9 1.9 –50 –25 0 25 50 75 100 125 150 0 50 100 150 200 250 300 TEMPERATURE (°C) TIME (μs) 83371 G07 83371 G08
Switching Waveforms, Soft-Start Bottom Switch Current Limit vs Bottom Switch Current Limit vs at Different VIN Voltages Temperature Duty Cycle
6.4 6.4 6.2 6.2 VOUT VOUT AT VIN = 13V 6.0 6.0 10V/DIV VOUT AT VIN = 9V V 5.8 5.8 OUT AT VIN = 5V EN/UVLO 5.6 5.6 2V/DIV CURRENT LIMIT (A) 5.4 CURRENT LIMIT (A) 5.4 1ms/DIV 83371 G10 V 5.2 5.2 IN = 13V FRONT PAGE CIRCUIT 5.0 5.0 –50 –25 0 25 50 75 100 125 150 0 25 50 75 100 TEMPERATURE (°C) DUTY CYCLE (%) 8337 G11 83371 G12 Rev. A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description 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
