Datasheet LTC3770 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Fast No RSENSE Step-Down Synchronous Controller with Margining, Tracking and PLL |
| Seiten / Seite | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense. On-Time vs … |
| Dateiformat / Größe | PDF / 273 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense. On-Time vs Temperature. Threshold vs VRNG Voltage
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LTC3770
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Maximum Current Sense On-Time vs Temperature Threshold vs VRNG Voltage Threshold vs Temperature
300 300 150 IION = 30μA VRNG = 1V VVON = 0V 250 250 140 200 200 130 150 150 ON-TIME (ns) 120 100 100 110 50 50 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 –50 –25 0 25 50 75 100 125 0.5 0.75 1.0 1.25 1.5 1.75 2.0 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VRNG VOLTAGE (V) TEMPERATURE (°C) 3770 G04 3770 G05 3770 G06
Error Amplifi er gm vs Temperature Input Current vs Input Voltage Shutdown Current vs Input Voltage
1.6 2.5 60 50 1.4 2.0 40 1.2 1.5 (mS) 30 g m 1.0 1.0 20 INPUT CURRENT (mA) 0.8 0.5 SHUTDOWN CURRENT (μA) 10 0.6 0 0 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3770 G07 3770 G08 3770 G09
Undervoltage Lockout Threshold INTVCC Load Regulation FCB Pin Current vs Temperature vs Temperature
0 0 4.0 –0.25 –0.1 3.5 –0.50 (%) CC –0.2 –0.75 3.0 INTV $ –1.00 FCB PIN CURRENT (μA) –0.3 2.5 –1.25 UNDERVOLTAGE LOCKOUT THRESHOLD (V) –0.4 –1.50 2.0 0 10 20 30 40 50 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 INTV TEMPERATURE (C) CC LOAD CURRENT (mA) TEMPERATURE (°C) 3770 G10 3770 G11 3770 G12 3770fc 5
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Maximum Current Sense On-Time vs Temperature Threshold vs VRNG Voltage Threshold vs Temperature
300 300 150 IION = 30μA VRNG = 1V VVON = 0V 250 250 140 200 200 130 150 150 ON-TIME (ns) 120 100 100 110 50 50 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 –50 –25 0 25 50 75 100 125 0.5 0.75 1.0 1.25 1.5 1.75 2.0 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VRNG VOLTAGE (V) TEMPERATURE (°C) 3770 G04 3770 G05 3770 G06
Error Amplifi er gm vs Temperature Input Current vs Input Voltage Shutdown Current vs Input Voltage
1.6 2.5 60 50 1.4 2.0 40 1.2 1.5 (mS) 30 g m 1.0 1.0 20 INPUT CURRENT (mA) 0.8 0.5 SHUTDOWN CURRENT (μA) 10 0.6 0 0 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 TEMPERATURE (°C) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3770 G07 3770 G08 3770 G09
Undervoltage Lockout Threshold INTVCC Load Regulation FCB Pin Current vs Temperature vs Temperature
0 0 4.0 –0.25 –0.1 3.5 –0.50 (%) CC –0.2 –0.75 3.0 INTV $ –1.00 FCB PIN CURRENT (μA) –0.3 2.5 –1.25 UNDERVOLTAGE LOCKOUT THRESHOLD (V) –0.4 –1.50 2.0 0 10 20 30 40 50 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 INTV TEMPERATURE (C) CC LOAD CURRENT (mA) TEMPERATURE (°C) 3770 G10 3770 G11 3770 G12 3770fc 5