UPC1944 NEC [NEC], UPC1944 Datasheet - Page 5

• Manufacturer Part Number: UPC1944
• Description: ADJUSTABLE PRECISION SHUNT REGULATORS
• Manufacturer: NEC [NEC]

Caution of Stability Area
If the Aluminum electrolytic capacitor is used, it should be kept C
capacitors, each capacitor is needed to be stable independently.
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
4.0
3.0
2.0
1.0
0.001
60
40
20
20
0
0
0
1k
a: V
b: V
c: V
T
20
220
A
I
- Operating Ambient Temperature - C
K
KA
KA
KA
(I
K
Stable
= V
= 3 V
= 5 V
0
= 10 mA)
10k
o
REF
in
20
A
f - Frequency - Hz
0.01
v
10 k
10 k
I
A
REF
C
40
v
KA
,
100k
V
R
vs T
KA
- Lode Capacitance -
1
vs f
a
= 10 k , R
60
Stability Area
= V
A
REF
80
, I
0.1
1M
K
= 10 mA,
2
100 120
b
=
Data Sheet G10239EJ3V0DS00
10M
Unstable
0
F
90
90
180
270
1
c
Stable
0.2
0.1
1.0
0.1
50
10
0
1k
KA
V
1mA
V
V
T
20
10
KA
KA
REF
A
- Operating Ambient Temperature - C
= V
= 24 V
= 0 V
6.8
0
I
REF
K
10k
30 mA
20
F. When using plural different types of
a:
b, c:
C
f - Frequency - Hz
KA
| Z
: Monolithic Ceramic Capacitor
I
Koff
40
KA
100k
150
150
Test Circuit
vs T
| vs f
60
I
I
KA
KA
A
80
1M
PC1943,1944
100 120
R
10 k
C
10M
KA
C
KA
5