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ADR430 Scheda tecnica(PDF) 21 Page - Analog Devices

Il numero della parte ADR430
Spiegazioni elettronici  Ultralow Noise XFET Voltage References ith Current Sink and Source Capability
PDF  24 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADR430 Scheda tecnica(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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