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ADR430 데이터시트(PDF) 21 Page - Analog Devices

부품명 ADR430
상세설명  Ultralow Noise XFET Voltage References with Current Sink and Source Capability
PDF  24 Pages
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ADR430 데이터시트(HTML) 21 Page - Analog Devices

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ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
Rev. J | Page 21 of 24
V–
V+
+
–
VIN
N1
VIN
VOUT
TRIM
GND
5V
U2
2N7002
AD8601
U1
ADR431
VO
RL
25Ω
2
6
5
4
PRECISION BOOSTED OUTPUT REGULATOR
A precision voltage output with boosted current capability can
be realized with the circuit shown in Figure 43. In this circuit,
U2 forces VO to be equal to VREF by regulating the turn-on of
N1. Therefore, the load current is furnished by VIN. In this
configuration, a 50 mA load is achievable at a VIN of 5 V. Moderate
heat is generated on the MOSFET, and higher current can be
achieved with a replacement of the larger device. In addition,
for a heavy capacitive load with step input, a buffer can be
added at the output to enhance the transient response.
Figure 43. Precision Boosted Output Regulator



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