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AD581 数据表(PDF) 8 Page - Analog Devices |
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AD581 数据表(HTML) 8 Page - Analog Devices |
8 / 12 page AD581 Rev. C | Page 8 of 12 PRECISION HIGH CURRENT SUPPLY CONNECTION FOR REDUCED PRIMARY SUPPLY The AD581 can be easily connected with power pnp or power Darlington pnp devices to provide much greater output current capability. The circuit shown in Figure 10 delivers a precision 10 V output with up to 4 A supplied to the load. The 0.1 μF capacitor is required only if the load has a significant capacitive component. If the load is purely resistive, improved high frequency supply rejection results from removing the capacitor. Whereas line regulation is specified down to 13 V, the typical AD581 works as specified ≤12 V. The current sink capability allows even lower supply voltage capability such as operation from 12 V ±5% as shown in Figure 11. The 560 Ω resistor reduces the current supplied by the AD581 to a manageable level at a full 5 mA load. Note that the other band gap references, without current sink capability, may be damaged by use in this circuit configuration. AD581 VIN ≥ 15V 470 Ω 0.1µF +VS VOUT GND 2N6040 VOUT 10V @ 4A AD581 GND +VS VOUT 12V ±5% 10V @ 0mA TO 5mA 560 Ω 5% Figure 11. 12 V Supply Connection Figure 10. High Current Precision Supply |
类似零件编号 - AD581_15 |
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类似说明 - AD581_15 |
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