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LT1460JCS3-3-TRPBF 数据表(PDF) 17 Page - Linear Technology |
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LT1460JCS3-3-TRPBF 数据表(HTML) 17 Page - Linear Technology |
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17 / 26 page  LT1460 1460fc Figure 13. CL = 0µF Figure 14. CL = 0.1µF Figure 15. IOUT = 1mA Figure 12. Response Time Test Circuit The LT1460S3 family of references are designed to be stable with a large range of capacitive loads. With no capacitive load, these references are ideal for fast settling or applications where PC board space is a premium. The test circuit shown in Figure 12 is used to measure the response time and stability of various load currents and load capacitors. This circuit is set for the 2.5V option. For other voltage options, the input voltage must be scaled up and the output voltage generator offset voltage must be adjusted. The 1V step from 2.5V to 1.5V produces a current step of 10mA or 1mA for RL = 100Ω or RL = 1k. Figure 13 shows the response of the reference to these applications inForMation LT1460S3-2.5 RL VOUT VGEN 1460 F12 CIN 0.1µF 2.5V 1.5V CL VIN = 2.5V 1µs/DIV 10mA 1mA 1.5V 2.5V 1460 F13 VGEN VOUT VOUT 100µs/DIV 10mA 1mA 1.5V 2.5V 1460 F14 VGEN VOUT VOUT 100µs/DIV 4.7µA 1µA 1.5V 2.5V 1460 F15 VGEN VOUT VOUT 1mA and 10mA load steps with no load capacitance, and Figure 14 shows a 1mA and 10mA load step with a 0.1µF output capacitor. Figure 15 shows the response to a 1mA load step with CL = 1µF and 4.7µF. The frequency compensation of the LT1460S3 version is slightlydifferentthanthatoftheotherpackages.Additional care must be taken when choosing load capacitance in an application circuit. Table 1 gives the maximum output capacitance for vari- ous load currents and output voltages of the LT1460S3 to avoid instability. Load capacitors with low ESR (effective series resistance) cause more ringing than capacitors with higher ESR such as polarized aluminum or tantalum capacitors. |
类似零件编号 - LT1460JCS3-3-TRPBF |
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类似说明 - LT1460JCS3-3-TRPBF |
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