Datasheet LTC1704, LTC1704B (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | 550kHz Synchronous Switching Regulator Controller Plus Linear Regulator Controller |
| Páginas / Página | 28 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. VOUTSW vs Load Current. IIMAX vs … |
| Formato / tamaño de archivo | PDF / 356 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. VOUTSW vs Load Current. IIMAX vs Temperature. IIMAX vs VCC. Maximum TG Duty Cycle
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LTC1704/LTC1704B
W U TYPICAL PERFOR A CE CHARACTERISTICS VOUTSW vs Load Current IIMAX vs Temperature IIMAX vs VCC
2.0 –8.5 –8.5 V T CC = 5V A = 25°C –9.0 –9.0 1.5 –9.5 –9.5 (V) µA) µA) ( 1.0 ( –10.0 –10.0 OUTSWV I IMAX I IMAX –10.5 –10.5 V 0.5 IN = 5V VOUTSW = 1.8V TA = 25°C –11.0 –11.0 RIMAX = 13.7k QT = QB = 2xFDS6670A 0 –11.5 –11.5 0 4 8 12 16 20 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 LOAD CURRENT (A) TEMPERATURE (°C) VCC (V) 1704 G09 1704 G10 1704 G11
Maximum TG Duty Cycle fOSC vs Temperature fOSC vs VCC vs Temperature
640 650 93 VCC = 5V TA = 25°C VCC = 5V 620 TG, BG FLOAT 92 600 610 580 91 570 560 (%) (kHz) (kHz) 90 540 MAX f OSC f OSC 530 DC 520 89 500 490 88 480 460 450 87 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VCC (V) TEMPERATURE (°C) 1704 G12 1704 G13 1704 G10
Drivers Rise and Fall Time vs Load VREGFB vs Temperature VREGFB Line Regulation
100 0.820 1.6 0.20 TA = 25°C VREGDR = 3.3V TA = 25°C 90 PVCC = BOOST = 5V V 0.815 1.2 REGDR = 0.8V 0.15 80 0.810 0.8 0.10 70 ∆ 0.805 0.4 0.05 V 60 REGFB (V) (mV) (ns) f 50 0.800 0 0 , t (%) t r REGFB REGFB 40 V 0.795 ∆V –0.4 –0.05 30 0.790 –0.8 –0.10 20 0.785 –1.2 –0.15 10 0 0.780 –1.6 –0.20 0 2000 4000 6000 8000 10000 – 50 – 25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 TG, BG LOAD (pF) TEMPERATURE (°C) VCC (V) 1704 G15 LTXXX • TPCXX 1704 G17 1704bfa 5
W U TYPICAL PERFOR A CE CHARACTERISTICS VOUTSW vs Load Current IIMAX vs Temperature IIMAX vs VCC
2.0 –8.5 –8.5 V T CC = 5V A = 25°C –9.0 –9.0 1.5 –9.5 –9.5 (V) µA) µA) ( 1.0 ( –10.0 –10.0 OUTSWV I IMAX I IMAX –10.5 –10.5 V 0.5 IN = 5V VOUTSW = 1.8V TA = 25°C –11.0 –11.0 RIMAX = 13.7k QT = QB = 2xFDS6670A 0 –11.5 –11.5 0 4 8 12 16 20 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 LOAD CURRENT (A) TEMPERATURE (°C) VCC (V) 1704 G09 1704 G10 1704 G11
Maximum TG Duty Cycle fOSC vs Temperature fOSC vs VCC vs Temperature
640 650 93 VCC = 5V TA = 25°C VCC = 5V 620 TG, BG FLOAT 92 600 610 580 91 570 560 (%) (kHz) (kHz) 90 540 MAX f OSC f OSC 530 DC 520 89 500 490 88 480 460 450 87 –50 –25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VCC (V) TEMPERATURE (°C) 1704 G12 1704 G13 1704 G10
Drivers Rise and Fall Time vs Load VREGFB vs Temperature VREGFB Line Regulation
100 0.820 1.6 0.20 TA = 25°C VREGDR = 3.3V TA = 25°C 90 PVCC = BOOST = 5V V 0.815 1.2 REGDR = 0.8V 0.15 80 0.810 0.8 0.10 70 ∆ 0.805 0.4 0.05 V 60 REGFB (V) (mV) (ns) f 50 0.800 0 0 , t (%) t r REGFB REGFB 40 V 0.795 ∆V –0.4 –0.05 30 0.790 –0.8 –0.10 20 0.785 –1.2 –0.15 10 0 0.780 –1.6 –0.20 0 2000 4000 6000 8000 10000 – 50 – 25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 TG, BG LOAD (pF) TEMPERATURE (°C) VCC (V) 1704 G15 LTXXX • TPCXX 1704 G17 1704bfa 5