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ADR441BRZ-REEL7 データシートの表示(PDF) - Analog Devices

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ADR441BRZ-REEL7 Ultralow Noise, LDO XFET Voltage References with Current Sink and Source ADI
Analog Devices ADI
ADR441BRZ-REEL7 Datasheet PDF : 20 Pages
First Prev 11 12 13 14 15 16 17 18 19 20
PRECISION OUTPUT REGULATOR
(BOOSTED REFERENCE)
VIN
CIN
0.1µF
2
VIN
ADR440/
ADR441/
ADR443/
ADR444/
ADR445
VOUT 6
GND
4
COUT
0.1µF
15V
–V
2N7002
RL
200
VO
CL
1µF
Figure 41. Boosted Output Reference
Higher current drive capability can be obtained, without
sacrificing accuracy, by using the circuit in Figure 41. The
operational amplifier regulates the MOSFET turn-on, forcing
VO to equal the VREF. Current is then drawn from VIN, allowing
increased current drive capability. The circuit allows a 50 mA
load; if higher current drive is required, use a larger MOSFET.
For fast transient response, add a buffer at VO to aid with
capacitive loading.
ADR440/ADR441/ADR443/ADR444/ADR445
Rev. A | Page 17 of 20
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