SCS 200 (serv.man10) - JBL Audio Service Manual (repair manual). Page 32

The AZ431-A series ICs are three-terminal adjustable
shunt regulators with guaranteed thermal stability over a
full operation range. These ICs feature sharp turn-on char-
acteristics, low temperature coefficient and low output
impedance, which make them ideal substitutes for Zener
diodes in applications such as switching power supply,
charger and other adjustable regulators.
 
The AZ431-A series ICs are of 40V voltage type. Its out-
put voltage can be set to any value between V

REF

(2.5V)

and 36V. 

The AZ431-A precision reference is offered in two band-
gap tolerance: 0.4% and 0.8%.

· Programmable Precise Output Voltage from 2.5V to

36V

· Very Accurate Reference Voltage: 0.15% Typical 
· High Stability under Capacitive Load
· Low Temperature Deviation: 4.5mV Typical
· Low Equivalent Full-range Temperature Coefficient

with 20PPM/

o

C Typical

· Low Dynamic Output Resistance: 0.2Ω Typical
· Sink Current Capacity from 1mA to 100 mA
· Low Output Noise
· Wide Operating Range of -40 to 125

o

C

· Charger
· Voltage Adapter
· Switching Power Supply
· Graphic Card
· Precision Voltage Reference

· Easier to Stabilize
· Ultra Low Temperature Coefficient
· Higher V

REF

 Accuracy

· Wider Operating Temperature Range
· Very Competitive Price

AZ431A-A

AZ431B-A

I

KA

 (Max) (mA)

100

100

I

KA

 (Min) (mA)

0.4

0.4

V

OUT

 / V

REF

 Initial 

Tol. (%)

0.4

0.8

V

OUT

 (Max) (V)

36

36

V

OUT

 (Min) (V)

2.5

2.5

Z

KA

 (Typ) (

Ω)

0.15

0.15

Temp Coeff. (Typ) 

(PPM/

o

C

)

20

20

Operating Temperature 

(Min) (

o

C

)

-40

-40

Operating Temperature 

(Max) (

o

C

)

+125

+125

· Samples
· Datasheet
· Reliability Report
· ESD Report

Nov. 2004

  BCD Semiconductor Manufacturing Limited

                Product Brief

SOT-23-3

SOT-89

ANODE

REF

CATHODE

REF

ANODE CATHODE

1

2

3

1

2

3

JBL

SCS200.5/230 Service Manual

Page 32 of 53