ADR440/ADR441/ADR443/ADR444/ADR445
PRECISION OUTPUT REGULATOR
(BOOSTED REFERENCE)
V
IN
2
V
IN
2N7002
ADR440/
ADR441/
ADR443/
ADR444/
ADR445
C
15V
IN
0.1µF
V
OUT
6
V
O
R
C
L
1µF
C
L
OUT
0.1µF
200Ω
GND
4
–V
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.
Rev. A | Page 17 of 20
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