Datasheet LTC3805 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Adjustable Frequency Current Mode Flyback DC/DC Controller |
| Pages / Page | 20 / 5 — typical perForMance characteristics. Reference Voltage. vs Temperature. … |
| File Format / Size | PDF / 268 Kb |
| Document Language | English |
typical perForMance characteristics. Reference Voltage. vs Temperature. vs Supply Voltage. Oscillator Frequency vs RFS
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Text Version of Document
LTC3805
typical perForMance characteristics Reference Voltage Reference Voltage vs Temperature vs Supply Voltage Oscillator Frequency vs RFS
812 0.800300 800 700 808 0.800200 600 804 0.800100 500 (V) TAGE (mV) 800 0.800000 (kHz) 400 V FB VOL f OSC 300 V FB 796 0.799900 200 792 0.799800 100 788 0.799700 0 –75 –50 –25 0 25 50 75 100 125 150 4 5 6 7 8 9 10 0 100 200 300 400 TEMPERATURE (°C) VCC (V) RFS (kΩ) 3805 G01 3805 G02 3805 G03
Oscillator Frequency Oscillator Frequency RUN Undervoltage Lockout vs Supply Voltage vs Temperature Thresholds vs Temperature
203 202 1.205 202 1.200 201 VRUN(ON) 201 R 1.195 FS = 124kΩ RFS = 124kΩ 200 1.190 (kHz) 200 TAGE (V) 199 f OSC 1.185 TOR FREQUENCY (kHz) RUN VOL 198 199 1.180 OSCILLA VRUN(OFF) 197 1.175 196 198 1.170 4 5 6 7 8 9 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 VCC (V) TEMPERATURE (°C) TEMPERATURE (°C) 3805 G04 3805 G05 3805 G06
RUN Hysteresis Current VCC Undervoltage Lockout Start-Up ICC Supply Current vs Temperature Thresholds vs Temperature vs Temperature
5.20 9.50 50 VTURN(ON) 48 8.50 5.10 46 44 7.50 5.00 42 Y CURRENT (µA) TAGE LOCKOUT (V) 6.50 40 I RUN(HYST) 4.90 VOL 38 5.50 T-UP SUPPL 36 UNDER 4.80 AR 34 V CC 4.50 V ST TURN(OFF) 32 4.70 3.50 30 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3805 G07 3805 G08 3805 G09 3805fg 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration 0rder Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts
typical perForMance characteristics Reference Voltage Reference Voltage vs Temperature vs Supply Voltage Oscillator Frequency vs RFS
812 0.800300 800 700 808 0.800200 600 804 0.800100 500 (V) TAGE (mV) 800 0.800000 (kHz) 400 V FB VOL f OSC 300 V FB 796 0.799900 200 792 0.799800 100 788 0.799700 0 –75 –50 –25 0 25 50 75 100 125 150 4 5 6 7 8 9 10 0 100 200 300 400 TEMPERATURE (°C) VCC (V) RFS (kΩ) 3805 G01 3805 G02 3805 G03
Oscillator Frequency Oscillator Frequency RUN Undervoltage Lockout vs Supply Voltage vs Temperature Thresholds vs Temperature
203 202 1.205 202 1.200 201 VRUN(ON) 201 R 1.195 FS = 124kΩ RFS = 124kΩ 200 1.190 (kHz) 200 TAGE (V) 199 f OSC 1.185 TOR FREQUENCY (kHz) RUN VOL 198 199 1.180 OSCILLA VRUN(OFF) 197 1.175 196 198 1.170 4 5 6 7 8 9 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 VCC (V) TEMPERATURE (°C) TEMPERATURE (°C) 3805 G04 3805 G05 3805 G06
RUN Hysteresis Current VCC Undervoltage Lockout Start-Up ICC Supply Current vs Temperature Thresholds vs Temperature vs Temperature
5.20 9.50 50 VTURN(ON) 48 8.50 5.10 46 44 7.50 5.00 42 Y CURRENT (µA) TAGE LOCKOUT (V) 6.50 40 I RUN(HYST) 4.90 VOL 38 5.50 T-UP SUPPL 36 UNDER 4.80 AR 34 V CC 4.50 V ST TURN(OFF) 32 4.70 3.50 30 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3805 G07 3805 G08 3805 G09 3805fg 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration 0rder Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts
