Datasheet LTC3832, LTC3832-1 (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 / 329 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
LTC3832/LTC3832-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Transconductance Load Regulation Line Regulation vs Temperature
2.54 0.605 5 2400 TA = 25°C TA = 25°C 0.604 4 µmho) 2.53 REFER TO FIGURE 12 2300 0.603 3 2.52 2200 0.602 2 2.51 ∆ 2100 0.601 1 VFB (V) (mV) 2.50 (V) 0.600 0 2000 OUT FB V V 2.49 0.599 –1 1900 0.598 –2 2.48 1800 0.597 –3 2.47 1700 0.596 –4 2.46 0.595 –5 ERROR AMPLIFIER TRANSCONDUCTANCE ( 1600 –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) 3832 G01 3832 G02 3832 G03
Error Amplifier Sink/Source Error Amplifier Open-Loop Gain Output Voltage Temperature Drift Current vs Temperature vs Temperature
2.55 50 70 REFER TO FIGURE 12 µA) 200 2.54 OUTPUT = NO LOAD 40 180 2.53 30 160 65 2.52 20 ∆V 140 2.51 10 OUT (V) 2.50 0 (mV) 120 60 OUTV2.49 –10 100 2.48 –20 80 55 2.47 –30 2.46 –40 60 ERROR AMPLIFIER OPEN-LOOP GIAN (dB) 2.45 –50 ERROR AMPLIFIER SINK/SOURCE CURRENT ( 40 50 –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) 3832 G04 3830 G05 3832 G06
Oscillator Frequency Oscillator Frequency Oscillator (VSAWH – VSAWL) vs Temperature vs FREQSET Input Current vs External Sync Frequency
360 700 1.5 FREQSET FLOATING T T A = 25°C A = 25°C 350 1.4 340 600 1.3 330 500 1.2 320 (V) 310 1.1 400 SAWL 300 1.0 – V 290 300 0.9 280 SAWHV 0.8 270 200 0.7 OSCILLATOR FREQUENCY (kHz) 260 OSCILLATOR FREQUENCY (kHz) 100 250 0.6 240 0 0.5 –50 –25 0 25 50 75 100 125 –30 –20 –10 0 10 20 30 100 200 300 400 500 TEMPERATURE (°C) FREQSET INPUT CURRENT (µA) EXTERNAL SYNC FREQUENCY (kHz) 3832 G07 3832 G08 3832 G09 sn3832 3832fs 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Error Amplifier Transconductance Load Regulation Line Regulation vs Temperature
2.54 0.605 5 2400 TA = 25°C TA = 25°C 0.604 4 µmho) 2.53 REFER TO FIGURE 12 2300 0.603 3 2.52 2200 0.602 2 2.51 ∆ 2100 0.601 1 VFB (V) (mV) 2.50 (V) 0.600 0 2000 OUT FB V V 2.49 0.599 –1 1900 0.598 –2 2.48 1800 0.597 –3 2.47 1700 0.596 –4 2.46 0.595 –5 ERROR AMPLIFIER TRANSCONDUCTANCE ( 1600 –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) 3832 G01 3832 G02 3832 G03
Error Amplifier Sink/Source Error Amplifier Open-Loop Gain Output Voltage Temperature Drift Current vs Temperature vs Temperature
2.55 50 70 REFER TO FIGURE 12 µA) 200 2.54 OUTPUT = NO LOAD 40 180 2.53 30 160 65 2.52 20 ∆V 140 2.51 10 OUT (V) 2.50 0 (mV) 120 60 OUTV2.49 –10 100 2.48 –20 80 55 2.47 –30 2.46 –40 60 ERROR AMPLIFIER OPEN-LOOP GIAN (dB) 2.45 –50 ERROR AMPLIFIER SINK/SOURCE CURRENT ( 40 50 –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) 3832 G04 3830 G05 3832 G06
Oscillator Frequency Oscillator Frequency Oscillator (VSAWH – VSAWL) vs Temperature vs FREQSET Input Current vs External Sync Frequency
360 700 1.5 FREQSET FLOATING T T A = 25°C A = 25°C 350 1.4 340 600 1.3 330 500 1.2 320 (V) 310 1.1 400 SAWL 300 1.0 – V 290 300 0.9 280 SAWHV 0.8 270 200 0.7 OSCILLATOR FREQUENCY (kHz) 260 OSCILLATOR FREQUENCY (kHz) 100 250 0.6 240 0 0.5 –50 –25 0 25 50 75 100 125 –30 –20 –10 0 10 20 30 100 200 300 400 500 TEMPERATURE (°C) FREQSET INPUT CURRENT (µA) EXTERNAL SYNC FREQUENCY (kHz) 3832 G07 3832 G08 3832 G09 sn3832 3832fs 4
