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ZR431LF02TA

Description
V-Ref Adjustable 1.24V to 10V 25mA 3-Pin SOT-23 T/R
CategoryVoltage reference   
File Size573KB,9 Pages
ManufacturerDiodes Incorporated
Environmental Compliance  
Related ProductsFound18parts with similar functions to ZR431LF02TA
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ZR431LF02TA Overview

V-Ref Adjustable 1.24V to 10V 25mA 3-Pin SOT-23 T/R

ZR431LF02TA Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8541.10.00.50
Reference TypeAdjustable
TopologyShunt
Initial Accuracy2.5%
Maximum Temperature Coefficient50ppm/°C
Output Voltage (V)1.24 to 10
Maximum Input Voltage (V)10
Maximum Output Current (mA)25
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
PackagingTape and Reel
Pin Count3
Standard Package NameSOT-23
Supplier PackageSOT-23
MountingSurface Mount
Package Height0.98
Package Length2.9
Package Width1.3
PCB changed3
Lead ShapeGull-wing

ZR431LF02TA Preview

ZR431L
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The ZR431L is a three terminal adjustable shunt regulator offering
excellent temperature stability and output current handling capability
up to 25mA. The output voltage may be set to any chosen voltage
between 1.24 and 10 volts by selection of two external divider
resistors.
The devices can be used as a replacement for zener diodes in many
applications requiring an improvement in zener performance.
The ZR431L is particularly used in the feedback control loop of
switch mode power supplies. In this application the device 1.24 volt
reference enables the generation of low voltage supplies, typically
3.3 volts or 3 volts.
Pin Assignments
(Top View)
V
REF
1
3 GND
V
Z
2
SOT23
Features
2.5% and 1% Tolerance
Max. Temperature Coefficient 50ppm/°
C
Temperature Compensated for Operation over The Full
Temperature Range
Programmable Output Voltage
100μA to 100mA Current Sink Capability
Surface Mount SOT23 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Shunt Regulator
Series Regulator
Voltage Monitor
Over Voltage/ Under Voltage Protection
Switch Mode Power Supplies
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
V+
V
OUT
V+
V
OUT
R1
V
REF
V
REF
R1
R2
R2
R1
V
V OUT
½ 
1
R2
REF
R1
V
V OUT
½ 
1
R2
REF
SHUNT REGULATOR
HIGHER CURRENT SHUNT REGULATOR
ZR431L
Document number: DS33256 Rev. 4 - 2
1 of 9
www.diodes.com
April 2015
© Diodes Incorporated
ZR431L
Typical Applications Circuit
(cont.)
V+
ZSR***
V+
IN
Common
R1
0.01µF
OUT
V
OUT
30
V
REF
R1
R2
V
REF
R2
V
OUT
V
OUT(MIN)
= V
REF
+ V
REG
R1
V
V OUT
½ 
1
R2
REF
R1
V
V OUT
½ 
1
R2
REF
OUTPUT CONTROL OF A THREE TERMINAL FIXED
REGULATOR
V+
V+
SERIES REGULATOR
R1A
R1B
V
REF
OUTPUT
OUTPUT
INPUT
V
ON
2V
V
OFF
= V+
V
TH
= 2.5V
V
REF
R2A
R2B
R1B
Low lim it
 
1
V
R2B
REF
SINGLE SUPPLY COMPARATOR WITH TEMPERATURE
COMPENSATED THRESHOLD
R1A
Highlim it
 
1
V REF
R2A
OVER VOLTAGE/UNDER VOLTAGE PROTECTION CIRCUIT
Functional Block Diagram
V
Z
GND
ZR431L
Document number: DS33256 Rev. 4 - 2
2 of 9
www.diodes.com
April 2015
© Diodes Incorporated
ZR431L
Absolute Maximum Ratings
(@T
A
= +25° unless otherwise specified.) (
Note 4
)
C,
Symbol
V
Z
I
Z
T
J
T
STG
θ
JA
Cathode Voltage
Cathode Current
Junction Temperature
Storage Temperature
Thermal Resistance
SOT23
Parameter
Rating
10
50
-40 to +125
-55 to +105
380
°
Unit
V
mA
°
C
C
°
C/W
Note 4: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional
operation of the device at these conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Recommended Operating Conditions
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
Z
I
Z
T
A
Cathode Voltage
Cathode Current
Operating Temperature
Parameter
Min
V
REF
0.1
-40
Max
10
25
+85
Unit
V
mA
°
C
Electrical Characteristics
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
REF
Parameter
2.5%
Reference Voltage
1%
V
DEV
ΔV
REF
ΔV
Z
I
REF
ΔI
REF
I
Z(MIN)
I
Z(OFF)
R
Z
Deviation of Reference Input Voltage Over I
L
= 10mA, V
Z
= V
REF
Temperature
T
A
= Full range (Figure 1)
Ratio of The Change in Reference Voltage V
Z
from V
REF
to 10V
to The Change in Cathode Voltage
I
Z
= 10mA (Figure 2)
Reference Input Current
R1 = 10k, R2 = O/C, I
L
= 10mA (Figure 2)
I
L
= 10mA (Figure 1), V
Z
= V
REF
1.228
0.02
1.24
4
0.5
0.11
0.02
30
10
0.25
1.252
8
2
0.4
0.2
100
30
2
mV
mV/V
µA
µA
µA
µA
Test Conditions
Min
1.209
Typ.
1.24
Max
1.271
V
Unit
Deviation of Reference Input Current over R1 = 10k, R2 = O/C, I
L
= 10mA
Temperature
T
A
= Full range (Figure 2)
Minimum Cathode Current for Regulation
Off-state Current
Dynamic Output Impedance
V
Z
= V
REF
(Figure 1)
V
Z
= 10V, V
REF
= 0V (Figure 3)
V
Z
= V
REF
(Figure 1), f = 0Hz
For definitions of reference voltage temperature coefficient and dynamic output impedance see NOTES following DC TEST CIRCUITS.
ZR431L
Document number: DS33256 Rev. 4 - 2
3 of 9
www.diodes.com
April 2015
© Diodes Incorporated
ZR431L
DC Test Circuits
Figure 1. Test Circuit for V
Z
= V
REF
Figure 2. Test Circuit for V
Z
> V
REF
Figure 3. Test Circuit for Off State Current
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:
V
MAX
V
ref
(ppm /
o
C)
½
V
dev
1000000
V
ref
(T1
T2)
The dynamic output impedance, R
Z
is defined as:
V
MIN
V
DEV
= V
MAX
- V
MIN
R
z
½
V
z
I
z
When the device is programmed with two external resistors, R1
and R2 (Figure 2), the dynamic output impedance of the overall
circuit, R’, is defined as:
T1
Temperature
T2
R
 ½
R
z
(1
R1
)
R2
ZR431L
Document number: DS33256 Rev. 4 - 2
4 of 9
www.diodes.com
April 2015
© Diodes Incorporated
ZR431L
Performance Characteristics
V
REF
=V
KA
I
K
=1mA
I
K
=10mA
ZR431L
Document number: DS33256 Rev. 4 - 2
5 of 9
www.diodes.com
April 2015
© Diodes Incorporated

ZR431LF02TA Related Products

ZR431LF02TA ZR431LF01TA
Description V-Ref Adjustable 1.24V to 10V 25mA 3-Pin SOT-23 T/R V-Ref Adjustable 1.24V to 10V 25mA 3-Pin SOT-23 T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
HTS 8541.10.00.50 8542.39.00.01
Reference Type Adjustable Adjustable
Topology Shunt Shunt
Initial Accuracy 2.5% 1%
Maximum Temperature Coefficient 50ppm/°C 50ppm/°C
Output Voltage (V) 1.24 to 10 1.24 to 10
Maximum Input Voltage (V) 10 10
Maximum Output Current (mA) 25 25
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Packaging Tape and Reel Tape and Reel
Pin Count 3 3
Standard Package Name SOT-23 SOT-23
Supplier Package SOT-23 SOT-23
Mounting Surface Mount Surface Mount
Package Height 0.98 0.98
Package Length 2.9 2.9
Package Width 1.3 1.3
PCB changed 3 3
Lead Shape Gull-wing Gull-wing

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