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V
REF
ppm
o
C
V
ref(dev)
V
REF
(t
一个
25
o
c)
10
6
T
一个
z
KA
∆
V
KA
∆
I
K
z
KA
∆
V
∆
I
z
KA
1
R1
R2
TLVH431ElectricalCharacteristics
V
REF
V
KA
tlvh431,tlvh431a,tlvh431b
tlvh432,tlvh432a,tlvh432b
低-voltageadjustableprecisionshuntregulators
SLVS555F–NOVEMBER2004–REVISEDOCTOBER2005
at25
°
cfree-airtemperature(unlessotherwisenoted)
TLVH431
TLVH432
PARAMETERTESTCONDITIONSUNIT
MINTYPMAX
T
一个
=25
°
c1.2221.241.258
tlvh431c1.211.27
V
KA
=V
REF
,
V
REF
ReferencevoltageV
T
一个
=fullrange,
I
K
=10mA
tlvh431i1.2021.278
看Figure1
(1)
tlvh431q1.1941.286
TLVH431C412
V
REF
deviationoverfull
V
ref(dev)
V
KA
=V
REF
,i
K
=10ma,看Figure1
(1)
TLVH431I620mV
temperaturerange
(2)
TLVH431Q1131
RatioofV
REF
changeto
I
K
=10ma,v
K
=V
REF
to18v,看Figure2–1.5–2.7mv/v
cathodevoltagechange
I
ref
ReferenceterminalcurrentI
K
=10ma,r1=10k
Ω
,r2=打开,看Figure20.10.5
µ
一个
tlvh431c0.050.3
I
ref
deviationoverfullI
K
=10ma,r1=10k
Ω
,r2=打开,
I
ref(dev)
tlvh431i0.10.4
µ
一个
temperaturerange
(2)
看Figure2
(1)
tlvh431q0.150.5
Minimumcathodecurrent
I
k(最小值)
V
KA
=V
REF
,看Figure160100
µ
一个
forregulation
I
k(止)
止-statecathodecurrentv
REF
=0,v
KA
=18v,看Figure30.020.1
µ
一个
V
KA
=V
REF
,f
≤
1khz,i
K
=0.1mato80ma,
|z
KA
|Dynamicimpedance
(3)
0.250.4
Ω
看Figure1
(1)fulltemperaturerangesare–40
°
Cto125
°
cfortlvh431q,–40
°
Cto85
°
cfortlvh431i,and0
°
Cto70
°
cfortlvh431c.
(2)thedeviationparametersv
ref(dev)
andI
ref(dev)
aredefinedasthedifferencesbetweenthemaximumandminimumvaluesobtainedover
theratedtemperaturerange.theaveragefull-rangetemperaturecoefficientofthereferenceinputvoltage,
α
V
REF
,isdefinedas:
在哪里
∆
T
一个
istheratedoperatingfree-airtemperaturerangeofthedevice.
α
V
REF
canbepositiveornegative,dependingonwhetherminimumv
REF
ormaximumV
REF
,各自,occursatthelower
温度.
(3)thedynamicimpedanceisdefinedas:
whenthedeviceisoperatingwithtwoexternalresistors(看Figure2),thetotaldynamicimpedanceofthecircuitisdefinedas:
8
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