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ZTLV431AFTA

P1-P3P4-P6P7-P8
Issue 7 - April 2008 1 www.zetex.com
© Zetex Semiconductors plc 2008
ZTLV431
1.24V Cost effective shunt regulator
Description
Ordering information
The ZTLV431 is a three terminal adjustable
shunt regulator offering excellent temperature
stability and output current handling capability
up to 20mA. The output voltage may be set to
any chosen voltage between 1.24 volts and 10
volts by selection of two external divider
resistors.
The ZTLV431 can be used as a replacement for
zener diodes in many applications requiring an
improvement in zener performance.
The ZTLV431 is available as standard as an
A grade which has an initial tolerance of 1%
and covers the -40°C to 125°C temperature
range as standard.
Features
• Low voltage operation V
REF
= 1.24V
• Temperature range -40 to 125°C
• Reference voltage tolerance at 25°C
• 1% ZTLV431A
• Typical temperature drift
• 4 mV (0°C to 70°C)
• 6 mV (-40°C to 85°C)
• 11mV (-40°C to 125°C
•100␮A minimum cathode current
•0.25⍀ typical output impedance
• Adjustable output voltage 1.24V to 10V
Applications
• Opto-coupler linearization
• Linear regulators
• Improved Zener
• Variable reference
Pin connections
Tol. Order code Package Part mark Status Reel size
(inches)
Tape width
(mm)
Quantity
per reel
1% ZTLV431AFTA SOT23 S1A Active 7” (180mm) 8 3,000
3Ref
ZTLV431_F (SOT23)
(top view)
Cathode
2
1 Anode
ZTLV431
Issue 7 - April 2008 2 www.zetex.com
© Zetex Semiconductors plc 2008
Absolute maximum ratings
Operation above the absolute maximum rating may cause device failure. Operation at the
absolute maximum ratings, for extended periods, may reduce device reliability.
Unless otherwise stated voltages specified are relative to the ANODE pin.
Package thermal data
Recommended operating conditions
Cathode voltage (V
KA
) 10V
Continuous cathode current (I
KA
) -20 to 20mA
Reference input current range (I
REF
) -0.05 to 3mA
Operating junction temperature -40 to 150°C
Storage temperature -55 to 150°C
Package ⍜
JA
P
DIS
T
A
=25°C
SOT23 380°C/W 330 mW
SOT23F 160°C/W 780 mW
Min. Max. Units
V
KA
cathode voltage V
REF
10 V
I
KA
cathode current 0.1 15 mA
T
A
operating ambient temperature range -40 125 °C
ZTLV431
Issue 7 - April 2008 3 www.zetex.com
© Zetex Semiconductors plc 2008
Electrical characteristics (electrical characteristics over recommended operating
conditions, T
A
= 25°C, K
KA
= V
REF
, I
KA
= 10mA unless otherwise stated)
Deviation of reference input voltage, V
DEV
, is defined as the maximum variation of the reference
input voltage over the full temperature range.
The average temperature coefficient of the reference input voltage, V
REF
is defined as:
The dynamic output impedance, Z
K
A, is defined as:
When the device is programmed with two externalresistors, R1
and R2, (fig 2) , the dynamic output impedance of the overall
circuit, Z’, is defined as:
Symbol Parameter Conditions Min. Typ. Max. Units
V
REF
Reference voltage
ZTLV431A 1.228 1.24 1.252
V
T
A
= -40 to 85°C ZTLV431A 1.215 1.265
T
A
= -40 to 125°C
ZTLV431A 1.209 1.271
V
REF(dev)
Deviation of reference
voltage over full
temperature range
T
A
= 0 to 70°C 4 12
mV
T
A
= -40 to 85°C 6 20
T
A
= -40 to 125°C
11 31
Ratio of change in
reference voltage to
the change in cathode
voltage
V
KA
from V
REF
to
I
KA
= 10mA
6V -1.5 -2.7
mV/V
10V -1.5 -2.7
I
REF
Reference input current
I
KA
= 10mA, R
1
= 10k⍀., R
2
= OC 0.1 0.5 µA
I
REF(dev)
I
REF
deviation over full
temperature range
I
KA
= 10mA,
R
1
= 10k⍀,
R
2
= OC
T
A
= 0 to 70°C 0.05 0.3
µA
T
A
= -40 to 85°C 0.1 0.4
T
A
= -40 to 125°C
0.15 0.5
I
KMIN
Minimum cathode
current for regulation
V
KA
= V
REF
T
A
= -40 to 125°C
55 100 µA
I
K(OFF)
Off-state current V
KA
= 10V, V
REF
=0V 10 30 µA
z
KA
Dynamic output
impedance
V
KA
= V
REF
, f = <1kHz,
I
K
= 0.1 to 15mA
0.25 0.4 ⍀
ΔV
REF
ΔV
KA
-----------------
V
max
V
min
T1 T2
V
dev
=V
max
-V
min
Temperature
V
REF
ppm
°C
-------------
⎠
⎞
⎝
⎛
V
DEV
x 1000000
V
REF
T
1
T
2
–()
------------------------------------------
=
Z
KA
ΔV
K
ΔI
K
----------=
Z′ Z
KA
x
R
R
+
()=
P1-P3P4-P6P7-P8

ZTLV431AFTA

Mfr. #:
Buy ZTLV431AFTA
Manufacturer:
Diodes Incorporated
Description:
Voltage References 0.5% COST EFFECTIVE
Lifecycle:
New from this manufacturer.
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