Datasheet LT1956, LT1956-5 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | High Voltage, 1.5A, 500kHz Step-Down Switching Regulators |
| Seiten / Seite | 28 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Minimum Input Voltage with 5V. … |
| Dateiformat / Größe | PDF / 316 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. Minimum Input Voltage with 5V. Switching Frequency. Output. BOOST Pin Current
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LT1956/LT1956-5
W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Input Voltage with 5V Switching Frequency Output BOOST Pin Current
575 7.5 45 VOUT = 5V L = 18µH 40 550 7.0 35 525 MINIMUM INPUT 30 6.5 VOLTAGE TO START 25 500 20 6.0 FREQUENCY (kHz) 475 MINIMUM INPUT INPUT VOLTAGE (V) 15 VOLTAGE TO RUN BOOST PIN CURRENT (mA) 5.5 10 450 5 425 5.0 0 –50 –25 0 25 50 75 100 125 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.5 1 1.5 JUNCTION TEMPERATURE (°C) LOAD CURRENT (A) SWITCH CURRENT (A) 1956 G10 1956 G11 1956 G12
Switch Minimum ON Time VC Pin Shutdown Threshold Switch Voltage Drop vs Temperature
2.1 450 600 400 1.9 TJ = 125°C 500 350 1.7 300 400 TJ = 25°C 1.5 250 300 1.3 200 150 200 1.1 SWITCH VOLTAGE (mV) TJ = –40°C THRESHOLD VOLTAGE (V) 100 0.9 SWITCH MINIMUM ON TIME (ns) 100 50 0.7 0 0 –50 –25 0 25 50 75 100 125 0 0.5 1 1.5 –50 –25 0 25 50 75 100 125 JUNCTION TEMPERATURE (°C) SWITCH CURRENT (A) JUNCTION TEMPERATURE (°C) 1956 G13 1766 G14 1956 G15 1956f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Input Voltage with 5V Switching Frequency Output BOOST Pin Current
575 7.5 45 VOUT = 5V L = 18µH 40 550 7.0 35 525 MINIMUM INPUT 30 6.5 VOLTAGE TO START 25 500 20 6.0 FREQUENCY (kHz) 475 MINIMUM INPUT INPUT VOLTAGE (V) 15 VOLTAGE TO RUN BOOST PIN CURRENT (mA) 5.5 10 450 5 425 5.0 0 –50 –25 0 25 50 75 100 125 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.5 1 1.5 JUNCTION TEMPERATURE (°C) LOAD CURRENT (A) SWITCH CURRENT (A) 1956 G10 1956 G11 1956 G12
Switch Minimum ON Time VC Pin Shutdown Threshold Switch Voltage Drop vs Temperature
2.1 450 600 400 1.9 TJ = 125°C 500 350 1.7 300 400 TJ = 25°C 1.5 250 300 1.3 200 150 200 1.1 SWITCH VOLTAGE (mV) TJ = –40°C THRESHOLD VOLTAGE (V) 100 0.9 SWITCH MINIMUM ON TIME (ns) 100 50 0.7 0 0 –50 –25 0 25 50 75 100 125 0 0.5 1 1.5 –50 –25 0 25 50 75 100 125 JUNCTION TEMPERATURE (°C) SWITCH CURRENT (A) JUNCTION TEMPERATURE (°C) 1956 G13 1766 G14 1956 G15 1956f 5