參數(shù)資料
型號(hào)： US431LCS
廠商： Unisem Group
英文描述： LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
中文描述： 低電壓調(diào)節(jié)精密并聯(lián)穩(wěn)壓器
文件頁(yè)數(shù)： 2/6頁(yè)
文件大?。?/td> 37K
代理商： US431LCS
US431L/431AL
2-2
Rev. 1.2
5/11/98
PARAMETER SYM
Reference Voltage Vref
US431L
Reference Voltage Vref
US431AL
Vref deviation over full Vref(dev)
temperature range
Ratio of Vref change to dVref/dV
KA
Cathode voltage change
Reference pin current
Iref deviation over full Iref(dev)
temperature range
Minimum cathode current I
K
(min)
Off state cathode current Ioff
Dynamic impedance Zka
0
TEST CONDITION
I
K
=10mA,V
KA
=Vref,Ta=25
°
C
I
K
=10mA,V
KA
=Vref
I
K
=10mA,V
KA
=Vref,Ta=25
°
C
I
K
=10mA,V
KA
=Vref
V
KA
=Vref, I
K
=10mA 4
Note 1
I
K
=10mA , dV
KA
=Vref to 6 V
MIN
1.228
1.221
1.234
1.228
TYP MAX
1.240
1.240
1.240
1.240
UNITS
V
1.252
1.259
1.246
1.252
12
V
mV
-1.5
-2.7 mV/V
I
K
=10mA , R1=10k
, R2=open
I
K
=10mA , R1=10k
, R2=open
Note 1
V
KA
=Vref
V
KA
=6V , Vref=0V
V
KA
=Vref, f<1 kHz,
I
K
=0.1 to 15 mA , Note 2
0.15
0.05
0.5
0.3
uA
uA
55
0.001
0.25
80
0.1
0.4
uA
uA
Unless otherwise specified ,these specifications apply over Ta=0 to 70
°
C, C
O
=1uF. Typical values refer to
Ta=25
°
C.Low duty cycle pulse testing are used which keeps junction and case temperatures equal to the
ambient temperature.
Note 2 :
Thedynamic
Note 1 :
The deviation parameters, Vref(dev) and Iref(dev) are
defined as the differences between the maximum and the minimum
values obtained over the rated temperature range. The average full
range temperature coeficient of the reference input voltage is de-
fined as :
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) ............................................................. 7V
Continuous Cathode Current Range ......................................... -20 mA to +20 mA
Reference Current Range ...................................................... -0.05 mA to 3 mA
Storage Temperature Range ................................ -65
°
C TO 150
°
C
Operating Junction Temperature Range ...................... 0
°
C TO 150
°
C
PACKAGE INFORMATION
5 PIN SOT 23 (L)
3 PIN PLASTIC TO-92 (Z) 8 PIN PLASTIC SOIC (S)
θ
JA
= 450
°
C/W
θ
JA
= 162°C/W
θ
JA
=160
°
C/W
ELECTRICAL SPECIFICATIONS
α
α
of the device.
α
minimum Vref or maximum Vref, respectively occurs at the
lower temperature.
Vref
Vref dev
Vref
(
C
T
Vref
T
Vref can b
A
A
=
°
(
25
)
)
10
6
Where:
unit is ppm/ C
is the rated operating free air temperature
e positive or negative depending on whether
VKA
IK
evice is operating with two external
resistors (see Figure 2), the total dynamic impedance
of the circuit is given by:
When the d
V
I
R
R
impedance when VKA = Vref is defined as :
Zka0
Zka
Zka0
=
=
=
×
+
1
1
2
3
2
1
4
5
TOP VIEW
Anode
Ref
NC
NC
Cathode
1
2
3
BOTTOM VIEW
Ref
Anode
Cathode
4
3
2
1
5
6
7
8
TOP VIEW
NC
NC
Anode
Anode
NC
NC
Ref
Cathode
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