ADR430 datasheet(21/24 Pages) AD

Part #	ADR430

Description	Ultralow Noise XFET Voltage References ith Current Sink and Source Capability

PDF	24 Pages

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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21 / 24 page

ADR430/ADR431/ADR433/ADR434/ADR435/ADR439

Rev. J | Page 21 of 24

V–

V+

–

VIN

VOUT

TRIM

GND

2N7002

AD8601

ADR431

25Ω

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

ADR430 Datasheet(PDF) 21 Page - Analog Devices