Datasheet LT3957A (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch |
| Pages / Page | 28 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise … |
| File Format / Size | PDF / 567 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. INTVCC Minimum Output. INTVCC vs Temperature
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LT3957A
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. INTVCC Minimum Output INTVCC vs Temperature Current Limit vs VIN INTVCC Load Regulation
5.4 90 5.3 T V J = 125°C IN = 6V 80 INTVCC = 3V 70 5.2 5.3 60 5.1 (V) 50 CC 5.2 CURRENT (mA) 40 VOLTAGE (V) INTV CC CC 5.0 30 INTV INTV 5.1 20 4.9 10 5.0 0 4.8 –50 –25 0 25 50 75 100 125 1 10 100 0 10 20 30 40 50 60 V TEMPERATURE (°C) IN (V) INTVCC LOAD (mA) 3957A G14 3957A G13 3957A G15
INTVCC Dropout Voltage Internal Switch On-Resistance INTVCC Line Regulation vs Current, Temperature vs Temperature
5.30 700 50 VIN = 5V 125°C 45 600 40 5.25 75°C 500 35 25°C 30 TAGE (V) TAGE (mV) 400 5.20 ANCE (mΩ) 25 VOL 300 0°C CC 20 V INT –40°C 200 15 5.15 ON-RESIST DROPOUT VOL 10 100 5 5.10 0 0 0 5 10 15 20 25 30 35 40 0 5 10 15 20 –50 –25 0 25 50 75 100 125 VIN (V) INTVCC LOAD (mA) TEMPERATURE (°C) 3957A G16 3957A G17 3957A G18
Internal Switch On-Resistance SEPIC Typical Start-Up SEPIC FBX Frequency Foldback vs INTVCC Waveforms Waveforms During Overcurrent
28.2 VIN = 12V VIN = 12V VOUT 28.0 10V/DIV 27.8 27.6 VOUT VSW 5V/DIV ANCE (mΩ) 20V/DIV 27.4 27.2 IL1A + IL1B IL1A + IL1B 5A/DIV ON-RESIST 27.0 2A/DIV 3957A G20 3957A G21 26.8 5ms/DIV 50μs/DIV SEE TYPICAL APPLICATION: 5V TO 16V INPUT, 26.6 SEE TYPICAL APPLICATION: 5V TO 16V INPUT, 3 4 5 6 7 8 12V OUTPUT SEPIC CONVERTER 12V OUTPUT SEPIC CONVERTER INTVCC (V) 3957A G19 3957afa 6
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted. INTVCC Minimum Output INTVCC vs Temperature Current Limit vs VIN INTVCC Load Regulation
5.4 90 5.3 T V J = 125°C IN = 6V 80 INTVCC = 3V 70 5.2 5.3 60 5.1 (V) 50 CC 5.2 CURRENT (mA) 40 VOLTAGE (V) INTV CC CC 5.0 30 INTV INTV 5.1 20 4.9 10 5.0 0 4.8 –50 –25 0 25 50 75 100 125 1 10 100 0 10 20 30 40 50 60 V TEMPERATURE (°C) IN (V) INTVCC LOAD (mA) 3957A G14 3957A G13 3957A G15
INTVCC Dropout Voltage Internal Switch On-Resistance INTVCC Line Regulation vs Current, Temperature vs Temperature
5.30 700 50 VIN = 5V 125°C 45 600 40 5.25 75°C 500 35 25°C 30 TAGE (V) TAGE (mV) 400 5.20 ANCE (mΩ) 25 VOL 300 0°C CC 20 V INT –40°C 200 15 5.15 ON-RESIST DROPOUT VOL 10 100 5 5.10 0 0 0 5 10 15 20 25 30 35 40 0 5 10 15 20 –50 –25 0 25 50 75 100 125 VIN (V) INTVCC LOAD (mA) TEMPERATURE (°C) 3957A G16 3957A G17 3957A G18
Internal Switch On-Resistance SEPIC Typical Start-Up SEPIC FBX Frequency Foldback vs INTVCC Waveforms Waveforms During Overcurrent
28.2 VIN = 12V VIN = 12V VOUT 28.0 10V/DIV 27.8 27.6 VOUT VSW 5V/DIV ANCE (mΩ) 20V/DIV 27.4 27.2 IL1A + IL1B IL1A + IL1B 5A/DIV ON-RESIST 27.0 2A/DIV 3957A G20 3957A G21 26.8 5ms/DIV 50μs/DIV SEE TYPICAL APPLICATION: 5V TO 16V INPUT, 26.6 SEE TYPICAL APPLICATION: 5V TO 16V INPUT, 3 4 5 6 7 8 12V OUTPUT SEPIC CONVERTER 12V OUTPUT SEPIC CONVERTER INTVCC (V) 3957A G19 3957afa 6
