AT431
Preliminary Product Information
1.24V Low-Voltage Adjustable Precision
Shunt Regulator
Absolute maximum ratings (T = 25oC)
A
Parameter
Cathode voltage
Symbol
Limits
12
unit
V
V
KA
Continuous cathode current range
Reference Current
I
-20~20
-0.05~3
mA
mA
K
I
REF
TOPR
TSTG
Operating temperature
Storage temperature
-30~+85
-55~+150
347
oC
oC
SOT-23-5
SOT-23-3
TO-92
oC / W
Package thermal impedance θ
JA
156
Power Dissipation
PD
(T (max)-T )/ θ
JA
J
A
Stresses beyond those listed under “ absolute maximum ratings” may cause permanent damage to the
device. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Recommend operating condtion
Parameter
min
Vref
0.05
0
Max
12
unit
V
Cathode voltage V
KA
Continuous cathode current range I
15
mA
oC
K
Operating free-air temperature range TA
70
Electrical characteristics (unless otherwise noted)
Parameter
Reference Voltage
Symbol
Min. Typ. Max.
1.228 1.24 1.252
Unit
V
Conditions
V
V
(TA = 25oC)
V
= V
ref
ref
ref
KA
I =10mA
(Figure 1)
(TA = full
1.221
-
1.259
V
K
o
range 0~70 C)
V
deviation over full
V
-
4
20
mV
V
= V
ref
ref
ref(dev)
KA
I =10mA
temperature range
(Figure 1)
K
Ratio of V change in
ref
cathode voltage change
-
-
-
-1.5
0.15
0.05
-2.7 mV/V V = V
∆ V /∆ V
KA ref to 12V
ref
KA
I =10mA
K
(Figure 2)
(Figure 2)
Reference terminal
current
I
0.5
0.3
I =10mA
µA
ref
K
R1=10KΩ
I
deviation over full
I
µA I =10mA R1=10KΩ
ref
temperature range
ref(dev)
K
R2=open
(Figure 2)
Minimum cathode current I
for regulation
-
-
40
50
V
= V
(Figure 1)
µA
µA
K(min)
K(off)
KA
ref
Off-state cathode current
I
0.001
0.1
V
V
V
=12V
KA
ref
=0V
= V
(Figure 3)
Dynamic impedance
| Z
|
-
0.20
0.4
Ω
KA
KA
ref f≤1KHz
I =0.1mA to 15mA
K
(Figure 1)
* The dynamic impedance is defined as : |Z
KA
| = ∆ V
/∆ I
KA KA
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
2/8/2006 REV:1.1
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
3
AIMTRON [ AIMTRON TECHNOLOGY ]
