ADR318ARJ-R2 Analog Devices Inc, ADR318ARJ-R2 Datasheet - Page 11

• Manufacturer Part Number: ADR318ARJ-R2
• Description: IC REF PREC LOW DRIFT SOT23-5
• Manufacturer: Analog Devices Inc

Specifications of ADR318ARJ-R2

• Rohs Status: RoHS non-compliant
• Reference Type: Series
• Voltage - Output: 1.8V
• Tolerance: ±0.27%
• Temperature Coefficient: 25ppm/°C
• Voltage - Input: 2.4 ~ 15 V
• Number Of Channels: 1
• Current - Quiescent: 140µA
• Current - Output: 5mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Current - Cathode: -
• Other names: ADR318ARJ-R2TR

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