Datasheet LTC3830, LTC3830-1 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation |
| Pages / Page | 24 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Error Amplifier Transconductance. … |
| File Format / Size | PDF / 277 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Error Amplifier Transconductance. Load Regulation. Line Regulation. vs Temperature
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Text Version of Document
LTC3830/LTC3830-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Transconductance Load Regulation Line Regulation vs Temperature
3.34 1.275 10 800 TA = 25°C TA = 25°C mho) µ 3.33 REFER TO FIGURE 12 1.273 8 750 1.271 6 3.32 1.269 4 700 3.31 ∆ 1.267 2 VFB (V) (mV) 3.30 (V) 1.265 0 650 OUT FB V V 3.29 1.263 –2 600 1.261 –4 3.28 1.259 –6 550 3.27 1.257 –8 3.26 1.255 –10 ERROR AMPLIFIER TRANSCONDUCTANCE ( 500 –15 –10 –5 0 5 10 15 3 4 5 6 7 8 –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (A) SUPPLY VOLTAGE (V) TEMPERATURE (˚C) 3830 G02 3830 G03 3830 G05
Error Amplifier Sink/Source Error Amplifier Open-Loop Gain Output Voltage Temperature Drift Current vs Temperature vs Temperature
3.34 40 A) 200 60 REFER TO FIGURE 12 µ 3.33 OUTPUT = NO LOAD 30 180 3.32 20 160 55 ∆ 3.31 10 V 140 OUT (V) (mV) 3.30 0 120 50 OUTV 3.29 –10 100 3.28 –20 80 45 3.27 –30 60 ERROR AMPLIFIER OPEN-LOOP GAIN (dB) 3.26 –40 ERROR AMPLIFIER SINK/SOURCE CURRENT ( 40 40 –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) 3830 G04 3830 G06 2830 G07
Oscillator Frequency Oscillator Frequency Oscillator (VSAWH – VSAWL) vs Temperature vs FREQSET Input Current vs External Sync Frequency
250 600 1.5 FREQSET FLOATING TA = 25°C TA = 25°C 240 1.4 500 1.3 230 1.2 220 400 (V) 1.1 210 SAWL 300 1.0 200 – V 0.9 190 200 SAWHV 0.8 180 0.7 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 100 170 0.6 160 0 0.5 –50 –25 0 25 50 75 100 125 –40 –30 –20 –10 0 10 20 100 200 300 400 500 TEMPERATURE (°C) FREQSET INPUT CURRENT (µA) EXTERNAL SYNC FREQUENCY (kHz) 3831 G08 3830 G09 3830 G10 3830fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Transconductance Load Regulation Line Regulation vs Temperature
3.34 1.275 10 800 TA = 25°C TA = 25°C mho) µ 3.33 REFER TO FIGURE 12 1.273 8 750 1.271 6 3.32 1.269 4 700 3.31 ∆ 1.267 2 VFB (V) (mV) 3.30 (V) 1.265 0 650 OUT FB V V 3.29 1.263 –2 600 1.261 –4 3.28 1.259 –6 550 3.27 1.257 –8 3.26 1.255 –10 ERROR AMPLIFIER TRANSCONDUCTANCE ( 500 –15 –10 –5 0 5 10 15 3 4 5 6 7 8 –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (A) SUPPLY VOLTAGE (V) TEMPERATURE (˚C) 3830 G02 3830 G03 3830 G05
Error Amplifier Sink/Source Error Amplifier Open-Loop Gain Output Voltage Temperature Drift Current vs Temperature vs Temperature
3.34 40 A) 200 60 REFER TO FIGURE 12 µ 3.33 OUTPUT = NO LOAD 30 180 3.32 20 160 55 ∆ 3.31 10 V 140 OUT (V) (mV) 3.30 0 120 50 OUTV 3.29 –10 100 3.28 –20 80 45 3.27 –30 60 ERROR AMPLIFIER OPEN-LOOP GAIN (dB) 3.26 –40 ERROR AMPLIFIER SINK/SOURCE CURRENT ( 40 40 –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) 3830 G04 3830 G06 2830 G07
Oscillator Frequency Oscillator Frequency Oscillator (VSAWH – VSAWL) vs Temperature vs FREQSET Input Current vs External Sync Frequency
250 600 1.5 FREQSET FLOATING TA = 25°C TA = 25°C 240 1.4 500 1.3 230 1.2 220 400 (V) 1.1 210 SAWL 300 1.0 200 – V 0.9 190 200 SAWHV 0.8 180 0.7 OSCILLATOR FREQUENCY (kHz) OSCILLATOR FREQUENCY (kHz) 100 170 0.6 160 0 0.5 –50 –25 0 25 50 75 100 125 –40 –30 –20 –10 0 10 20 100 200 300 400 500 TEMPERATURE (°C) FREQSET INPUT CURRENT (µA) EXTERNAL SYNC FREQUENCY (kHz) 3831 G08 3830 G09 3830 G10 3830fa 4
