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ADR435ARMZ Просмотр технического описания (PDF) - Analog Devices

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ADR435ARMZ Ultralow Noise XFET Voltage References with Current Sink and Source Capability ADI
Analog Devices ADI
ADR435ARMZ Datasheet PDF : 24 Pages
First Prev 21 22 23 24
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439
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.
VIN
2
VIN
U1
ADR431
VOUT 6
TRIM 5
GND
4
N1
5V
2N7002
+
U2 V+
AD8601
V–
VO
RL
25
Figure 43. Precision Boosted Output Regulator
Rev. J | Page 21 of 24
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