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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT3045 датащи(PDF) 25 Page - Linear Technology |
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LT3045 датащи(HTML) 25 Page - Linear Technology |
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25 / 36 page  LT3045-1 25 30451fa For more information www.linear.com/LT3045-1 APPLICATIONS INFORMATION can be seen, when the LDO is disabled, the LDO input volt- age goes to the maximum input voltage set by the resistor divider on the VIOC pin. Figure 13 shows the load step response of the LT8608 using the VIOC buffer. Figure 14 shows the LDO’s input and output voltage response to stepping the set pin from 3V to 4V. Figure 15 shows the LDO’s output and input voltage while ramping the SET pin from 0V to 10V, and as can be seen, the LT8608’s output voltage tracks the LT3045’s output voltage when it is greater than 1.5V. Lastly, Figure 16 shows the noise spectral density at the LT3045-1 input and output. Figure 12. LT3045-1 EN/UV Pulse VEN/UV LDOIN LDOOUT RSET = 33.2kΩ RL = 6.6Ω VIN LT8608 = 20V 500ms/DIV 0V 1V/DIV 5V/DIV 0V 30451 F12 Figure 13. Load Step Response Using the VIOC Buffer ILOAD LDOIN (ac) LDOOUT (ac) RSET = 33.2kΩ ILOAD = 10mA to 500mA 200µs/DIV 0mA 500mA/DIV 100mV/DIV 50mV/DIV 30451 F13 Figure 14. Stepping VSET from 3V to 4V (and Back to 3V) VSET LDOIN LDOOUT VSET = 3V TO 4V IL = 500mA 1ms/DIV 0V 1V/DIV 30451 F14 VSET AND LDOOUT ARE OVERLAID Figure 15. Ramping VSET from 0V to 10V (and Back to 0V) VSET LDOOUT LDOIN IL = 500mA 5ms/DIV 2V/DIV 0V 30451 F15 VSET AND LDOOUT ARE OVERLAID Figure 16. LT3045-1’s Input and Output Noise Spectral Density LDOIN = 4.3V LDOOUT = 3.3V ILOAD = 500mA LDOOUT LDOIN Noise Floor FREQUENCY (Hz) 10 100 1k 10k 100k 1M 10M 0.01 0.1 1 10 100 1000 30451 F16 |
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