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LT1460EIS8-2.5-PBF Datasheet(PDF) 16 Page - Linear Technology |
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LT1460EIS8-2.5-PBF Datasheet(HTML) 16 Page - Linear Technology |
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16 / 26 page  LT1460 1460fc LT1460-5 RL VOUT VGEN 1460 F06 CIN 0.1µF 5V 4V CL VIN = 5V 2µs/DIV 5V 4V RL = 10k RL = 1k 1460 F07 VGEN VOUT VOUT 10µs/DIV 5V 4V RL = 10k RL = 1k 1460 F08 VGEN VOUT VOUT CL = 1µF. RS should not be made arbitrarily large because it will limit the load regulation. Figure 6 to Figure 8 illustrate response in the LT1460-5. The 1V step from 5V to 4V produces a current step of 1mA or 100µA for RL = 1k or RL = 10k. Figure 7 shows the response of the reference with no load capacitance. The reference settles to 5mV (0.1%) in less than 2µs for a 100µA pulse and to 0.1% in 3µs with a 1mA step. When loadcapacitanceisgreaterthan0.01µF,thereferencebegins to ring due to the pole formed with the output impedance. Figure 8 shows the response of the reference to a 1mA Figure 6. Response Time Test Circuit Figure 8. CL = 0.01µF Figure 7. CL = 0 and 100µA load current step with a 0.01µF load capacitor. Figure 9 to Figure 11 illustrate response of the LT1460-10. The 1V step from 10V to 9V produces a current step of 1mA or 100µA for RL = 1k or RL = 10k. Figure 10 shows the response of the reference with no load capacitance. The reference settles to 10mV (0.1%) in 0.4µs for a 100µA pulse and to 0.1% in 0.8µs with a 1mA step. When load capacitance is greater than 0.01µF, the reference begins to ring due to the pole formed with the output impedance. Figure11showstheresponseofthereferencetoa1mAand 100µA load current step with a 0.01µF load capacitor. Figure 11. CL = 0.01µF Figure 10. CL = 0 Figure 9. Response Time Test Circuit LT1460-10 RL VOUT VGEN 1460 F09 CIN 0.1µF 10V 9V CL VIN = 12.5V 2µs/DIV 10V 9V RL = 10k RL = 1k 1460 F10 VGEN VOUT VOUT 10µs/DIV 10V 9V RL = 10k RL = 1k 1460 F11 VGEN VOUT VOUT applications inForMation |
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