Shunt Regulator. SPX431B Datasheet

SPX431B Regulator. Datasheet pdf. Equivalent


Sipex Corporation SPX431B
www.DataSheet4U.com
SPX431A,B,C
Precision Adjustable Shunt Regulator
FEATURES
• Trimmed Bandgap: 0.5%, 1% and 2%
• Wide Operating Current: 1mA to 150mA
• Extended Temperature Range:
0°C to 105°C
• Low Temperature Coefficient: 30 ppm/°C
• Improved Replacement in Performance
for TL431
• Low Cost Solution
• Available in Lead Free, RoHS compliant
packaging: SOIC, SOT-89, SOT-23-3,
SOT-23-5, and TO-92
APPLICATIONS
• Battery Operated Equipment
• Adjustable Supplies
• Switching Power Supplies
• Error Amplifiers
• Single Supply Amplifier
• Monitors/VCRs/TVs
• Personal Computers
DESCRIPTION
The SPX431 is a three-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431 has thermal stability, wide operating current of 150mA
and broad temperature range of 0°C to 150°C, making it suitable for a variety of applications
which require a low-cost, high performance solution. SPX431A tolerance of 0.5% is proven
to be sufficient to overcome all other errors in the system to virtually eliminate the need for
trimming in the power supply manufacturer's assembly line and contribute a significant cost
savings. The output voltage may be adjusted to any value between VREF and 36 volts with
two external resistors. The SPX431 is available in SOIC-8, SOT-23-3, SOT-23-5, SOT89,
and TO-92 packages.
typical applications circuit
Cathode (K)
Reference
(R)
Rev F: Nov 21-06
+
-
2.5V
Anode (A)
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation


SPX431B Datasheet
Recommendation SPX431B Datasheet
Part SPX431B
Description (SPX431A/B/C) Precision Adjustable Shunt Regulator
Feature SPX431B; www.DataSheet4U.com SPX431A,B,C Precision Adjustable Shunt Regulator FEATURES • Trimmed Bandgap: 0.
Manufacture Sipex Corporation
Datasheet
Download SPX431B Datasheet




Sipex Corporation SPX431B
ABSOLUTE MAXIMUM RATINGS
Cathode-Anode Reverse Breakdown Vka ......................................37V
Anode-Cathode Forward Current, (<10ms) Iak ................................1A
Operating Cathode Current Ika ..................................................150mA
Reference Input Current Iref .......................................................10mA
Continuous Power Dissipation at 25°C Pd
SOIC-8......................................................................750mW
SOT-23-5 .................................................................200 mW
SOT-23-3 .................................................................417 mW
SOT-89..................................................................1000mW\
TO-92........................................................................775mW
Junction Temperature Tj ........................................................... 150 °C
Storage Temperature Tstg ...............................................-65 to 150 °C
NOTE: Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this speci-
fication is not implied. Exposure to absolute maximum rating conditions
for extended periods may affect reliability.
Recommended conditions
PARAMETER
SYMBOL RATING
Cathode Voltage VKA VREF to 36
Cathode Current IK 10
UNIT
V
mA
TYpical thermal resistances
PACKAGE ØJA
ØJC TYPICAL DERATING
SOIC-8 124.8°C/W 45°C/W
TO-92 131.9°C/W 80°C/W
SOT-89 107.1°C/W 8°C/W
SOT-23-5 191°C/W 150°C/W
SOT-23-3 300°C/W 136°C/W
5.7 mW/°C
6.3 mW/°C
9.1 mW/°C
1.7 mW/°C
3.3 mW/°C
Typical deratings of the thermal resistances are given for ambient
temperature >25°.
ELECTRICAL CHARACTERISTICS
Electrical characteristics at 25°C Ik = 10mA Vk = Vref, unless otherwise specified.
Parameter
Symbol
Test
Conditions
Test
Circuit
SPX431A
SPX431B
SPX431C
Unit
Min Typ Max Min Typ Max Min Typ Max
Reference Voltage VREF
TJ = 0°C to
105°C
1
1
2.490
2.469
2.503
2.515
2.536
2.470
2.449
2.495
2.520
2.541
2.445
2.495
2.545
V
V
∆VREF with Temp.
TC
1
0.07 0.20
0.07 0.20
0.07
0.20
mV/
°C
Ratio of Change
in VREF to Cath-
ode Voltage
∆Vref
∆Vk
VREF to 10V
10V to 36V
-2.7 -1.0
-2.7 -1.0
-2.7 -1.0
mV/
2 -2 -0.4 0.3 -2.0 -0.4 0.3 -2 -0.4 0.3 V
Reference Input
Current
IREF
2
0.7 4
0.7 4
0.7 4 µA
IREF Temp
Deviation
∆IREF
TJ = 0°C to
105°C
2
0.4 1.2
0.4 1.2
0.4 1.2 µA
Min IK for
Regulation
IK(MIN)
1
0.4 1
0.4 1
0.4 1 mA
Off State Leak-
age
Dynamic Output
Impedance
IK(OFF)
ZKA
VREF = 0V,
VKA = 36V
f
Z
=
1kHz
IK = 1 to 150mA
3
1
0.04 250
0.15 0.5
0.04 500
0.15 0.5
0.04 1000 nA
0.15 0.5 Ω
Rev F: Nov 21-06
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation



Sipex Corporation SPX431B
CalculatiNG average Temperature coeFficient (tc)
ppm/°C %/°C
00
mV/°C
0
5000 0.5
-10
DVREF
D
0 15 30 45 60 75 90 105
Junction Temperature (°C)
0.07 mV/°C
0.003 %/°C
27 ppm/°C
TC in mV/°C =
DVREF (mV)
DTA
( )TC in %/°C =
DVREF
DVREF at 25°C
DTA
x 100
( )TC in ppm/°C =
DVREF
DVREF at 25°C
DTA
x 106
Figure 1. Vref VS Temperature.
8-Pin Surface Mount (S)
CATHODE
ANODE
ANODE
18
27
SPX431
36
REF
ANODE
ANODE
N/C 4
5 N/C
Top View
SOT-23-5 (M5)
REF ANODE
54
SPX431
12 3
N/C N/C CATHODE
Top View
PACKAGE PINOUTS
SOT-89 (M1)
SPX431
1 23
REF ANODE CATHODE
Top View
TO-92 (N)
1 23
SOT-23-3 (M)
ANODE
3
SPX431
12
REF
ANODE
CATHODE
CATHODE REF
Bottom View
Top View
Test circuits
VIN
IREF
VKA = VREF
VIN
VKA
VIN
IK
R1
IREF
IK
(VREF)
R2
VKA
IK (OFF)
Test Circuit 1.
Test Circuit for Vka = Vref
Rev F: Nov 21-06
Test Circuit 2.
Test Circuit for Vka > Vref
Test Circuit 3.
Test Circuit for Ikoff
SPX431A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)