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參數(shù)資料
| 型號： | ADR318ARJ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Precision Low Drift SOT-23 Voltage Reference with Shutdown |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.8 V, PDSO5 |
| 封裝： | MO-178AA, SOT-23, 5 PIN |
| 文件頁數(shù)： | 8/8頁 |
| 文件大小： | 492K |
| 代理商： | ADR318ARJ-REEL7 |
C
P
–8–
ADR318
OUTLINE DIMENSIONS
5-Lead Plastic Surface-Mount Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
PIN 1
1.60 BSC
2.80 BSC
1.90
BSC
0.95 BSC
1
3
4
5
2
0.22
0.08
0.60
0.45
0.30
10
0
0.50
0.30
0.15 MAX
SEATING
PLANE
1.45 MAX
1.30
1.15
0.90
COMPLIANT TO JEDEC STANDARDS MO-178AA
2.90 BSC
REV. 0
High Power Performance with Current Limit
In some cases, the user may want higher output current delivered
to a load and still achieve better than 0.5% accuracy out of the
ADR318. The accuracy for a reference is normally specified on
the data sheet with no load. However, the output voltage changes
with load current.
The circuit in Figure 5 provides high current without compromis-
ing the accuracy of the ADR318. The power BJT Q1 provides
the required current, up to a 1 A. The ADR318 delivers the base
drive to Q1 through the force pin. The sense pin of the ADR318
is a regulated output and is connected to the load.
The transistor Q2 protects Q1 during short circuit limit faults by
robbing its base drive. The maximum current is I
L, MAX
= 0.6 V/R
S
.
V
OUT(F)
V
OUT(S)
GND
ADR318
V
IN
V
IN
R1
Q2
Q1
4.7k
SHDN
R
S
R
L
Figure 5. High Power Performance with Current Limit
A similar circuit function can also be achieved using the Darlington
transistor configuration, as shown in Figure 6.
V
OUT(F)
V
OUT(S)
GND
ADR318
V
IN
V
IN
R1
Q2
4.7k
SHDN
R
L
Q1
R
S
Figure 6. High Output Current with Darlington
Drive Configuration
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