ZR431(C,F,G) Datasheet by Diodes Incorporated

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ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
1 of 9
www.diodes.com October 2011
© Diodes Incorporated
ADVANCE INFORMATION
Description
The ZR431 is a three terminal adjustable shunt regulator
offering excellent temperature stability and output current
handling capability up to 100mA. The output voltage may be
set to any chosen voltage between 2.5 and 20 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.
Features
Surface mount SOT223 and SOT23 packages
2%, 1 % and 0.5% tolerance
Max. temperature coefficient 55 ppm/°C
Temperature compensated for operation
over the full temperature range
Programmable output voltage
50μA to 100mA current sink capability
Low output noise
All package options available in “Green” Molding
Compound (No Br, Sb) and Lead Free Finish/ RoHS
Compliant (Note 1)
Pin Assignments
Applications
Shunt regulator
Series regulator
Voltage monitor
Over voltage/ under voltage protection
Switch mode power supplies
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
+
V
REF
V
Z
GND
GND
V
REF
V
Z
1
3
2
SOT23
(Top View)
1
2
3
4
V
Z
GND
V
REF
GND
SOT223
Pin 4 floating or
connected to pin 2
(Top View
)
mDESQ In
ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
2 of 9
www.diodes.com October 2011
© Diodes Incorporated
ADVANCE INFORMATION
Absolute Maximum Ratings (Note 2)
Symbol Parameter Rating Unit
VZ Cathode Voltage 20 V
IZ Cathode Current 150 mA
TA Operating Temperature -40 to +85 °C
TST Storage Temperature -55 to +125 °C
PD Power Dissipation (Notes 3, 4) SOT23 330 mW
SOT223 2 W
Notes: 2. 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.
3. TJ, max =150°C.
4. Ratings apply to ambient temperature at 25°C.
Recommended Operating Conditions (TA = 25°C)
Symbol Parameter Min Max Unit
VZ Cathode Voltage VREF 20 V
IZ Cathode Current 0.05 100 mA
Electrical Characteristics (TA = 25°C unless otherwise specified)
Symbol Parameter Test Conditions Min Typ. Max Unit
VREF
Reference voltage (Note 5) 2%
1 %
0.5%
IL = 10mA (Fig 1), VZ = VREF
2.45
2.475
2.487
2.50
2.50
2.50
2.55
2.525
2.513
V
VDEV Deviation of reference input voltage
over temperature
IL = 10mA, VZ = VREF
TA = Full range (Fig 1) 8.0 17 mV
ΔVREF
ΔVZ
Ratio of the change in reference
voltage to the change in cathode
voltage
VZ from VREF to 10V
IZ = 10mA (fig 2) -1.85 -2.7
mV/V
VZ from 10V to 20V
IZ = 10mA (Fig 2) -1.0 -2.0
IREF Reference input current R1 = 10k, R2 = O/C, IL = 10mA (Fig 2) 0.12 1.0 μA
ΔIREF Deviation of reference input current
over temperature
R1 = 10k, R2 = O/C, IL = 10mA
TA = Full range (Fig 2) 0.04 0.2 μA
IZ(MIN) Minimum cathode current for
regulation VZ = VREF (Fig 1) 35 50 µA
IZ(OFF) Off-state current VZ = 20V, VREF = 0V (Fig 3) 0.1 μA
RZ Dynamic output impedance VZ = VREF (Fig 1), f = 0Hz 0.75
Note 5: 0.5% and 1% SOT23 only
For definitions of reference voltage temperature coefficient and dynamic output impedance see NOTES following DC TEST CIRCUITS
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ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
3 of 9
www.diodes.com October 2011
© Diodes Incorporated
ADVANCE INFORMATION
DC Test Circuits
Fig. 1 Test Circuit for VZ = VREF
Fig. 2 Test Circuit for VZ > VREF
Fig.3 Test Circuit for Off State Current
Deviation of reference input voltage, VDEV, 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, VREF is defined as:
)2T1T(V
1000000V
)C/ppm(V
ref
dev
o
ref
×
=
The dynamic output impedance, RZ is defined as:
z
z
zI
V
RΔ
Δ
=
When the device is programmed with two external resistors,
R1 and R2, (Fig 2), the dynamic output impedance of the
overall circuit, R’, is defined as:
)
2R
1R
1(RR z+=
Input
I
L
I
REF
I
Z
V
Z
V
REF
Input
I
L
I
REF
I
Z
V
Z
V
REF
R1
R2
Input
I
ZOFF
V
Z
T1 T2Temperature
V = V - V
DEV MAX MIN
V
MAX
V
MIN
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ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
4 of 9
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© Diodes Incorporated
ADVANCE INFORMATION
Typical Characteristics
-40 -20 020 40 60 80
TEMPERATURE (°C)
Reference Current vs. Temperature
160
140
140
130
120
110
100
R
E
F
E
R
E
N
C
E
C
U
R
R
E
N
T
(nA)
V = V
I = 10mA
REF
Z
Z
0
CATHODE VOLTAGE (V)
Change in V vs. Cathode Voltage
REF
5101520
-10
-5
-15
-20
-25
CHANGE in REFERENCE OUTPUT
VOLTAGE (mV)
I = 10mA
Z
-40 -20 020 40 60 80
TEMPERATURE (°C)
Cathode Current vs. Temperature
24
26
28
30
32
34
36
38
M
I
N
I
M
U
M
C
A
T
H
O
D
E
C
U
R
R
E
N
T
(µA)
V = V
REF Z
100
FREQUENCY (Hz)
Dynamic Impedance vs. Frequency
1k 10k 100k 1M
0.1
1.0
10
100
DYNAMIC IMPEDANCE ( )
Ω
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
2.490
-40 -20 020 40 60 80
TEMPERATURE (°C)
Reference Voltage vs. Temperature
R
EFE
R
ENCE V
O
LTA
G
E (V)
I = 10mA
Z
25 50 75 85 100
AMBIENT TEMPERATURE ( C)
Power Dissipation Derating
°
2.0
0
1.0
SOT223
SOT23
P
O
WE
R
DISSI
P
A
T
I
O
N (W)
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ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
5 of 9
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© Diodes Incorporated
ADVANCE INFORMATION
Typical Characteristics (cont.)
IZ = 10mA, TA = 25°C
Test Circuit for Open Loop Voltage Gain
TA = 25°C
Test Circuit for Pulse Response
VREF < VZ < 20, IZ = 10mA, TA = 25°C
Test Circuit for Stability Boundary Conditions
100 1k 10k 100k 1M
FREQUENCY (Hz)
Gain vs. Frequency
0
20
40
60
O
P
EN L
O
O
P
V
O
L
T
A
G
E
G
AIN (dB)
0 0.2 0.4 0.6 0.8 1.0
TIME (µs)
Pulse Response
0
0
5.0
1.0
2.0
3.0
V
O
L
T
A
G
E SWI
N
G
(V)
Repetitive Pulse
Single Pulse V
Z
INPUT
10p 100p 1000p 0.01µ 0.
LOAD CAPACITANCE (F)
Stability Boundary Conditions
0
20
40
60
80
100
C
A
T
H
O
DE
C
U
R
R
E
N
T
(mA)
STABLE STABLE
V
Z
230
I
Z
15k
9µF
8k25
+
-
220 V
Z
50
Input Monitor
Pulse
Generator
Input 150
I
Z
10k
V
Z
ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
6 of 9
www.diodes.com October 2011
© Diodes Incorporated
ADVANCE INFORMATION
Application Characteristics
VREF
2R
1R
1
VOUT
+=
SHUNT REGULATOR
VREF
2R
1R
1
VOUT
+=
HIGHER CURRENT SHUNT REGULATOR
VOUT(MIN) = VREF + VREG
VREF
2R
1R
1
VOUT
+=
OUTPUT CONTROL OF A THREE TERMINAL
FIXED REGULATOR
VREF
2R
1R
1
VOUT
+=
SERIES REGULATOR
SINGLE SUPPLY COMPARATOR WITH
TEMPERATURE COMPENSATED THRESHOLD
VREF
B2R
B1R
1itlimLow
++
VREF
A2R
A1R
1itlimHigh
++
OVER VOLTAGE/UNDER VOLTAGE
PROTECTION CIRCUIT
V+ V
OUT
V
REF
R1
R2
ZSR***
Common
IN OUT
V+
V
REF
V
OUT
R2
R1
30
Ω
0.01µF
V+ V
OUT
V
REF
R1
R2
V+ V
OUT
R1
R2
V
REF
V+
INPUT
V = 2.5V
TH
OUTPUT
V = V+
OFF
V 2V
ON
V+
V
REF
OUTPUT
V
REF
R1A R1B
R2A R2B
mDESQ In
ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
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© Diodes Incorporated
ADVANCE INFORMATION
Ordering Information
Device Tolerance Package
Code Part Mark Packaging
7” Tape and Reel
Quantity Part Number
Suffix
ZR431F005-7 0.5% F 43R SOT23 3000/Tape & Reel -7
ZR431F005TA 0.5% F 43R SOT23 3000/Tape & Reel TA
ZR431F01-7 1% F 43B SOT23 3000/Tape & Reel -7
ZR431F01TA 1% F 43B SOT23 3000/Tape & Reel TA
ZR431FTA 2% F 43A SOT23 3000/Tape & Reel TA
ZR431GTA 2% G ZR431 SOT223 1000/Tape & Reel TA
Tolerance Packing
-7: Tape & Reel
TA : Tape & Reel
ZR431
X
XXX XX
005 : 0.5%
0.1 : 1%
Blank : 2%
Package
F : SOT23
G : SOT223
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ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
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Package Outline Dimensions (All Dimensions in mm)
(1) Package Type: SOT23
(2) Package Type: SOT223
SOT23
Dim Min Max Typ
A 0.37 0.51 0.40
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.903 1.10 1.00
K1 - - 0.400
L 0.45 0.61 0.55
M 0.085 0.18 0.11
α 0° 8° -
All Dimensions in mm
SOT223
Dim Min Max Typ
A 1.55 1.65 1.60
A1 0.010 0.15 0.05
b1 2.90 3.10 3.00
b2 0.60 0.80 0.70
C 0.20 0.30 0.25
D 6.45 6.55 6.50
E 3.45 3.55 3.50
E1 6.90 7.10 7.00
e4.60
e12.30
L 0.85 1.05 0.95
Q 0.84 0.94 0.89
All Dimensions in mm
A
M
JL
D
F
BC
H
K
G
K1
A1
A
mDESQ In
ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
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IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability
arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any
license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described
herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies
whose products are represented on Diodes Incorporated website, harmless against all damages.
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sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
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and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
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notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2011, Diodes Incorporated
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