ADR318 Analog Devices, Inc., ADR318 Datasheet - Page 11

• Manufacturer Part Number: ADR318
• Description: Precision Low Drift Sot-23 Voltage Reference With Shutdown
• Manufacturer: Analog Devices, Inc.

The transistor Q2 protects Q1 during short-circuit limit faults
by robbing its base drive. The maximum current is I
0.6 V/R
S
.
Figure 21. High Power Performance with Current Limit
V
IN
4.7kΩ
R1
SHDN
V
OUT(S)
ADR318
V
IN
V
OUT(F)
GND
Q2
R
R
S
L
Q1
L, MAX
=
Rev. A | Page 11 of 12
A similar circuit function can also be achieved using the
Darlington transistor configuration, as shown in Figure 22.
Figure 22. High Output Current with Darlington Drive Configuration
V
IN
4.7kΩ
R1
SHDN
V
OUT(S)
ADR318
V
IN
V
OUT(F)
GND
R
S
Q1
R
L
Q2
ADR318