TL431 / TL431A / TL431B
TM
®
Precision programmable References
P
RODUCTION
D
ATA
S
HEET
TYPICAL CHARACTERISTICS
6
5
WWW .
Microsemi
.C
OM
V
IN
- (V)
4
3
2
1
Pulse
Generator
f = 100kHz
50
220
(V
KA
)
Output Voltage - (V)
0
3
2
1
0
05
13
2
4
F
O
O
R
DU
N
E
C
W
T
D
E
SI
GN
S
I
K
150
V
BATT
Ou tput
GND
P
R
6
Test Circuit for Pulse Response
(t) Time - (µs)
Figure 14 –
Pulse Response
100
90
(I
K
) Cathode Current - mA
80
70
60
50
40
30
20
10
0
0.001
A V
KA
= V
REF
B V
KA
= 5V
C V
KA
= 10V
D V
KA
= 15V
Stable
A*
EC
S
OM
OL
ME
ET
ND
E
ED
I
K
= 10mA
T
A
= 25 °C
Stable
C*
R1=10k
B*
C
L
R2
O
B
R
D*
Test Circuit for Curve A
150
I
K
0.01
N
O
0.1
T
1
10
C
HARTS
C
HARTS
C
L
V
BATT
(C
L
) Load Capacitance - (µF)
Figure 15 –
Stability Boundary Conditions
*The areas under the curves represent conditions that may cause the device
to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the
initial V
KA
and I
K
conditions with C
L
= 0. V
BATT
and C
L
were then adjusted to
determine the ranges of stability.
Test Circuit for Curve B, C, D
Copyright
©
1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
MICROSEMI [ MICROSEMI CORPORATION ]
