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PDF ZXRE252 Data sheet ( Hoja de datos )
| Número de pieza | ZXRE252 | |
| Descripción | VERY LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR | |
| Fabricantes | Diodes | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZXRE252 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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ZXRE250/ZXRE252
VERY LOW CATHODE CURRENT ADJUSTABLE
PRECISION SHUNT REGULATOR
Description
The ZXRE250 and ZXRE252 are three terminal adjustable
shunt regulators 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
36 volts by selection of two external divider resistors.
ZXRE250 has the same electrical specifications as the
industry standard ‘431 except that it features a very low
minimum cathode current for regulation. The typical value of
40µA makes the parts ideal for very low power applications.
The devices can be used as a replacement for zener diodes
in many applications requiring an improvement in zener
performance. The ZXRE250/2 is available in 2 grades with
initial tolerances of 1% and 0.5% for the A and B grades
respectively.
Features
• Minimum cathode current for regulation: 40μA (typ)
• Temperature range -40 to 125ºC
• Reference Voltage Tolerance at 25°C
o ZXRE250A: 2.495V ± 1.0%.
o ZXRE250B: 2.495V ± 0.5%
• Low Output Noise
• 0.2Ω Typical Output Impedance
• Sink Current Capability: 0.065mA to 100mA
• Adjustable Output Voltage: VREF to 36V
• SOT23 and SOT25: Available in “Green” Molding
Compound (No Br, Sb) and Lead Free Finish/ RoHS
Compliant (Note 1)
Applications
• Opto-Coupler Linearisers
• Shunt Regulators
• Improved Zener
• Variable Reference
Pin Assignments
ZXRE250
(Top View)
ANODE 1
3 REF
2 CATHODE
SOT23
(Top View)
NC 1
Leave floating or
connect to pin 5
2
CATHODE 3
5 ANODE
4 REF
SOT25
ZXRE252
(Top View)
ANODE 1
3 CATHODE
2 REF
SOT23
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.
ZXRE250/ZXRE252
Document number: DS35228 Rev. 3 - 2
1 of 14
www.diodes.com
May 2011
© Diodes Incorporated
1 page  
ZXRE250/ZXRE252
VERY LOW CATHODE CURRENT ADJUSTABLE
PRECISION SHUNT REGULATOR
Typical Performance Characteristics
26 00
25 80
25 60
25 40
IKA = 10mA
VKA = VREF
TA = 25°C
25 20
25 00
24 80
24 60
24 40
24 20
24 00
-55
-35 -15 5 25 45 65 85 105 125
TA Free Air Temperature (°C)
Reference Voltage vs. Free Air Temperature
15 0
10 0
VKA = VREF
TA = 25°C
50
0.2
0.1 5
R1 = 10KΩ
R2 = ∞
IKA = 10mA
0.1
0.0 5
0
-55 -35 -15 5 25 45 65 85 105 125
TA Free Air Temperature (°C)
Reference Current vs. Free Air Temperature
20 0
VKA = VREF
TA = 25°C
10 0
IKMIN
0
0
-50
-100
-2
-1 0 1 2
VKA Cathode Voltage (V)
Cathode Current vs. Cathode Voltage
3
-100
-2
-1 0 1 2
VKA Cathode Voltage
Cathode Current vs. Cathode Voltage
3
ZXRE250/ZXRE252
Document number: DS35228 Rev. 3 - 2
5 of 14
www.diodes.com
May 2011
© Diodes Incorporated
5 Page 
Ordering Information
ZXRE250/ZXRE252
VERY LOW CATHODE CURRENT ADJUSTABLE
PRECISION SHUNT REGULATOR
ZXRE25 X X XX - 7
Pinout variation
0: Standard pinout
2: Reversed pinout in SOT23
Tolerance
A: ±1.0%
B: ±0.5%
Package
SA: SOT23
W5: SOT25
Packing
7: Tape & Reel
Device
(Note 7)
Package Packaging
Code
(Note 5)
7” Tape and Reel
Quantity
Part Number
Suffix
Ammo Box
Quantity
Part Number
Suffix
ZXRE250A(B)SA-7 SA
SOT23
3000/Tape & Reel
-7
NA
NA
ZXRE250A(B)W5-7 W5
SOT25
3000/Tape & Reel
-7
NA
NA
ZXRE252A(B)SA-7 SA
SOT23
3000/Tape & Reel
-7
NA
NA
Notes:
7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
8. Suffix (B) denotes ZXRE250B (0.5% tolerance) device.
ZXRE250/ZXRE252
Document number: DS35228 Rev. 3 - 2
11 of 14
www.diodes.com
May 2011
© Diodes Incorporated
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ZXRE252.PDF ] | |
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