lh0070 Linear Technology Corporation, lh0070 Datasheet - Page 8

• Manufacturer Part Number: lh0070
• Description: Precision 10v Reference
• Manufacturer: Linear Technology Corporation

APPLICATIO S I FOR ATIO
APPLICATIO CIRCUITS
There is nothing magical about foam cups—any
enclosure which blocks air flow from the reference will do.
Smaller enclosures are better since they do not allow the
build-up of internally generated air movement. Naturally,
heat generating components external to the reference
itself should not be included inside the enclosure.
LT1031/LH0070
8
–15V
Boosted Output Current with Current Limit
V
+
LED
≥ 12.8V
D1*
Negative Series Reference
4.7k
R2
4.7k
U
U
R1
2N2905
15V
*GLOWS IN CURRENT LIMIT
Q1
DO NOT OMIT
D1
15V
LT1031
U
GND
IN
IN
R1
220Ω
OUT
LT1031
GND
W
OUT
+
2N2905
8.2Ω
10V
AT 100mA
2µF
SOLID
TANT
LT1031 • AC03
LT1031 • AC01
–10V
AT 50mA
U
*SELECT R1 TO DELIVER TYPICAL LOAD CURRENT
LT1031 WILL THEN SOURCE OR SINK AS NECESSARY
TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD,
AS OUTPUT WILL BE DRIVEN (UNREGULATED) HIGH. LINE
REGULATION IS DEGRADED IN THIS APPLICATION
Boosted Output Current with No Current Limit
LT1031
0
GND
15V
IN
Noise Induced by Air Turbulence
(TO-5 PACKAGE)
f = 0.01Hz to 10Hz
Handling Higher Load Currents
V
+
OUT
≥ 11.8V
2
30mA
20µV
220Ω
LT1031
R1
(TO-5 Package)
GND
4
TIME (MINUTES)
IN
OUT
R1*
169Ω
R
6
L
FOAM CUP REMOVED
V
+
TYPICAL LOAD
CURRENT = 30mA
OUT
2N2905
8
= 10V
10V
AT 100mA
2µF
SOLID
TANT
LT1031 • AC02
10
LT1031 • TA07
12
LT1031 • AC04
1031fb