8

LT1031/LH0070

1031fb

APPLICATIO S I FOR ATIO

Noise Induced by Air Turbulence

(TO-5 Package)

TIME (MINUTES)

20

µV

06

10

LT1031 • TA07

24

812

FOAM CUP REMOVED

(TO-5 PACKAGE)

f = 0.01Hz to 10Hz

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.

Boosted Output Current with No Current Limit

Negative Series Reference

R1

4.7k

R2

4.7k

D1

15V

Q1

2N2905

–10V

AT 50mA

LT1031 • AC01

–15V

15V

LT1031

GND

IN

OUT

Boosted Output Current with Current Limit

LT1031

GND

OUT

IN

LT1031 • AC04

15V

30mA

TYPICAL LOAD

CURRENT = 30mA

*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

R1*

169

Ω

Handling Higher Load Currents

LT1031

GND

OUT

IN

2N2905

≥ 11.8V

R1

220

Ω

10V

AT 100mA

2

µF

SOLID

TANT

LT1031 • AC02

+

APPLICATIO CIRCUITS

LT1031

GND

OUT

IN

2N2905

*GLOWS IN CURRENT LIMIT

DO NOT OMIT

8.2

Ω

R1

220

Ω

D1*

LED

≥ 12.8V

10V

AT 100mA

2

µF

SOLID

TANT

LT1031 • AC03

+