Datasheet LTC3778 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Wide Operating Range, No RSENSE Step-Down Controller |
| Seiten / Seite | 24 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. On-Time vs ION Current. On-Time vs … |
| Dateiformat / Größe | PDF / 312 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. On-Time vs ION Current. On-Time vs VON Voltage. On-Time vs Temperature
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LTC3778
W U TYPICAL PERFOR A CE CHARACTERISTICS On-Time vs ION Current On-Time vs VON Voltage On-Time vs Temperature
10k 1000 300 VVON = 0V IION = 30µA IION = 30µA VON = 0V 250 800 1k 200 600 150 ON-TIME (ns) ON-TIME (ns) 400 ON-TIME (ns) 100 100 200 50 10 0 0 1 10 100 0 1 2 3 –50 –25 0 25 50 75 100 125 ION CURRENT (µA) VON VOLTAGE (V) TEMPERATURE (°C) 3778 G20 3778 G21 3778 G22
Maximum Current Sense Maximum Current Sense Current Limit Foldback Threshold vs VRNG Voltage Threshold vs RUN/SS Voltage
150 300 150 VRNG = 1V VRNG = 1V 125 250 125 100 200 100 75 150 75 50 100 50 25 50 25 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 0 0.15 0.30 0.45 0.60 0.5 0.75 1.0 1.25 1.5 1.75 2.0 1.5 2 2.5 3 3.5 V V FB (V) RNG VOLTAGE (V) RUN/SS VOLTAGE (V) 3778 G09 3778 G10 3778 G23
Maximum Current Sense Feedback Reference Voltage Threshold vs Temperature vs Temperature Error Amplifier gm vs Temperature
150 0.62 2.0 VRNG = 1V 140 1.8 0.61 130 1.6 0.60 (mS) g m 120 1.4 0.59 110 1.2 FEEDBACK REFERENCE VOLTAGE (V) MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 0.58 1.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3778 G11 3778 G12 3778 G13 3778f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS On-Time vs ION Current On-Time vs VON Voltage On-Time vs Temperature
10k 1000 300 VVON = 0V IION = 30µA IION = 30µA VON = 0V 250 800 1k 200 600 150 ON-TIME (ns) ON-TIME (ns) 400 ON-TIME (ns) 100 100 200 50 10 0 0 1 10 100 0 1 2 3 –50 –25 0 25 50 75 100 125 ION CURRENT (µA) VON VOLTAGE (V) TEMPERATURE (°C) 3778 G20 3778 G21 3778 G22
Maximum Current Sense Maximum Current Sense Current Limit Foldback Threshold vs VRNG Voltage Threshold vs RUN/SS Voltage
150 300 150 VRNG = 1V VRNG = 1V 125 250 125 100 200 100 75 150 75 50 100 50 25 50 25 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 0 0.15 0.30 0.45 0.60 0.5 0.75 1.0 1.25 1.5 1.75 2.0 1.5 2 2.5 3 3.5 V V FB (V) RNG VOLTAGE (V) RUN/SS VOLTAGE (V) 3778 G09 3778 G10 3778 G23
Maximum Current Sense Feedback Reference Voltage Threshold vs Temperature vs Temperature Error Amplifier gm vs Temperature
150 0.62 2.0 VRNG = 1V 140 1.8 0.61 130 1.6 0.60 (mS) g m 120 1.4 0.59 110 1.2 FEEDBACK REFERENCE VOLTAGE (V) MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 0.58 1.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3778 G11 3778 G12 3778 G13 3778f 5