Datasheet LTC3823 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Fast No RSENSE Step-Down Synchronous DC/DC Controller with Differential Output Sensing, Tracking and PLL |
| Seiten / Seite | 26 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense. On-Time vs … |
| Dateiformat / Größe | PDF / 315 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Maximum Current Sense. On-Time vs Temperature. Threshold vs VRNG Voltage
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LTC3823
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Maximum Current Sense On-Time vs Temperature Threshold vs VRNG Voltage Threshold vs Temperature
250 300 150 IION = 30μA VRNG = 1V 245 V 145 ON = 0V 240 250 140 235 135 230 200 130 225 125 220 120 ON-TIME (ns) 150 215 115 210 100 110 205 105 MAX CURRENT SENSE THRESHOLD (mV) MAX CURRENT SENSE THRESHOLD (mV) 200 50 100 –50 –25 0 25 50 75 100 125 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VRNG VOLTAGE (V) TEMPERATURE (°C) 3823 G04 3823 G05 3823 G06
Error Amplifi er gm vs Temperature Input Current vs Input Voltage Shutdown Current vs Input Voltage
1.8 2.5 60 50 1.7 2.0 40 (mS) 30 g m 1.6 1.5 20 INPUT CURRENT (mA) SHUTDOWN CURRENT (μA) 10 1.5 1.0 0 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 0 5 10 15 20 25 30 TEMPERATURE (°C) INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 3823 G07 3823 G08 3823 G09
INTVCC Load Regulation FCB Pin Current vs Temperature Track Up
0 –1.00 FIGURE 12 CIRCUIT –0.1 –1.05 TRACK/SS –0.2 –1.10 –0.3 –1.15 VFB –0.4 –1.20 (%) TRACK/SS CC –0.5 –1.25 AND VFB VOUT 500mV/DIV ΔINTV –0.6 –1.30 VOUT –0.7 –1.35 FCB PIN CURRENT (μA) 2V/DIV –0.8 –1.40 250ms/DIV 3823 G12 –0.9 –1.45 –1.0 –1.50 0 5 10 15 20 25 30 35 40 45 50 –50 –25 0 25 50 75 100 125 INTVCC LOAD CURRENT (mA) TEMPERATURE (°C) 3823 G10 3823 G11 3823fd 5
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Maximum Current Sense On-Time vs Temperature Threshold vs VRNG Voltage Threshold vs Temperature
250 300 150 IION = 30μA VRNG = 1V 245 V 145 ON = 0V 240 250 140 235 135 230 200 130 225 125 220 120 ON-TIME (ns) 150 215 115 210 100 110 205 105 MAX CURRENT SENSE THRESHOLD (mV) MAX CURRENT SENSE THRESHOLD (mV) 200 50 100 –50 –25 0 25 50 75 100 125 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VRNG VOLTAGE (V) TEMPERATURE (°C) 3823 G04 3823 G05 3823 G06
Error Amplifi er gm vs Temperature Input Current vs Input Voltage Shutdown Current vs Input Voltage
1.8 2.5 60 50 1.7 2.0 40 (mS) 30 g m 1.6 1.5 20 INPUT CURRENT (mA) SHUTDOWN CURRENT (μA) 10 1.5 1.0 0 –50 –25 0 25 50 75 100 125 0 5 10 15 20 25 30 0 5 10 15 20 25 30 TEMPERATURE (°C) INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 3823 G07 3823 G08 3823 G09
INTVCC Load Regulation FCB Pin Current vs Temperature Track Up
0 –1.00 FIGURE 12 CIRCUIT –0.1 –1.05 TRACK/SS –0.2 –1.10 –0.3 –1.15 VFB –0.4 –1.20 (%) TRACK/SS CC –0.5 –1.25 AND VFB VOUT 500mV/DIV ΔINTV –0.6 –1.30 VOUT –0.7 –1.35 FCB PIN CURRENT (μA) 2V/DIV –0.8 –1.40 250ms/DIV 3823 G12 –0.9 –1.45 –1.0 –1.50 0 5 10 15 20 25 30 35 40 45 50 –50 –25 0 25 50 75 100 125 INTVCC LOAD CURRENT (mA) TEMPERATURE (°C) 3823 G10 3823 G11 3823fd 5