spx432am5-tr Exar Corporation, spx432am5-tr Datasheet

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spx432am5-tr

Manufacturer Part Number
spx432am5-tr
Description
1.24v Precision Adjustable Shunt Regulator
Manufacturer
Exar Corporation
Datasheet
APPLICATIONS
Date: 12/11/04
The SPX432 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 1.24V
bandgap reference with 0.5% tolerance. The SPX432’s thermal stability, wide operating current
(80mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications. SPX432
tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually
eliminate the need for trimming in the power supply manufactures’ assembly lines and contribute a
significant cost savings.
The SPX432 is an ideal voltage reference in an isolated feedback circuit for switch mode power
supplies. SPX432 offers many advantages over the TLV431 such as wider output voltage (18V vs.
6V), higher output current (80mA vs. 15mA) and a wider operating temperature range with a tighter
tolerance down to 0.5%.
FEATURES
Switching Power Supplies
Adjustable Supplies
Error Amplifiers
Low Voltage Operation, 1.24V
Trimmed Bandgap to 0.5% and 1%
Wide Operating Current, 1mA to 80mA
Adjustable Output Voltage, V
Extended Temp.Range: 0°C to 105°C
Low Temperature Coefficient, 50 ppm/°C
Offered in TO-92, SOIC, SOT-23-3
Replacement for TLV431, AS432
Reference
(R)
1.24V Precision Adjustable Shunt Regulator
®
1.24V
SPX432 1.24V Precision Adjustable Shunt Regulator
REF
to 18V
+
-
Cathode (K)
Anode (A)
1
Refer to page 11 for other pinouts.
Now Available in Lead Free Packaging
Single Supply Amplifier
Monitors / VCRs / TVs
Personal Computers
Voltage References
Ref
1
3 Pin SOT-23
SPX432
Anode
3
© Copyright 2004 Sipex Corporation
BLOCK DIAGRAM
Cathode
2
DESCRIPTION
SPX432

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spx432am5-tr Summary of contents

Page 1

Precision Adjustable Shunt Regulator FEATURES Low Voltage Operation, 1.24V Trimmed Bandgap to 0.5% and 1% Wide Operating Current, 1mA to 80mA Adjustable Output Voltage, V Extended Temp.Range: 0°C to 105°C Low Temperature Coefficient, 50 ppm/°C Offered in TO-92, ...

Page 2

ABSOLUTE MAXIMUM RATINGS Cathode-Anode Reverse Breakdown V ....................................... 20V KA Anode-Cathode Forward Current, (<10ms) I ................................. 1A AK Operating Cathode Current I .................................................... 80mA KA Reference Input Current I .......................................................... 1mA REF Stresses greater than those listed under ABSOLUTE MAXIMUM ...

Page 3

CALCULATION AVERAGE TEMPERATURE COEFICIENT (TC) ppm % ∆V -5 5000 0 0.0033mV /°C 0.0027% / °C 27ppm/°C Figure Temperature. REF REF I I REF K ...

Page 4

REF 0°C to 105°C 10.0 7.5 5.0 2.5 0 -2.5 -5.0 -7.5 -10 Cathode Voltage (V) KA High Current Operating Characteristics. 1.25 1.245 1.24 1.235 1.23 1.225 1.22 -60 ...

Page 5

T Ambient Temperature (C) A Off State Leakage 18V 0V. KA REF 0.150 REF 80mA 0.125 K ...

Page 6

OUT 1mA OUT 50mA OUT 100mA. KA Date: 12/11/04 TYPICAL PERFORMANCE CHARACTERISTICS 10mA. ...

Page 7

0.1% V REF R2 0.1% Shunt Regulator (1+R1/R2)V OUT REF V OUT R3 Opto Isolator Isolated Feedback SPX432 V RTN OUT Reference Amplifier for Isolated Feedback in Off-Line DC-DC Converters. V ...

Page 8

D e E/2 1 INDEX AREA (D/2 X E1/2) TOP VIEW 8 Pin NSOIC JEDEC MO-012 (AA) Variation SYMBOL MIN A 1.35 A1 0.1 A2 1.25 b 0.31 c 0.17 D 4.90 BSC E 6.00 BSC E1 3.90 BSC e ...

Page 9

Pin SOT-23 JEDEC TO-236 (AB) Variation MIN NOM SYMBOL 0.88 0. 2.8 2.9 e 0.95 BSC e1 1.90 ...

Page 10

Pin TO-92 MIN NOM SYMBOL A 0.17 b 0.014 E 0.13 e 0.95 e1 0.045 L 0.5 R 0.085 S1 0.045 W 0.016 D 0.175 a 4º Note: Dimensions in (inches) Date: 12/11/04 L MAX ...

Page 11

Surface Mount ( CATHODE ANODE 2 7 ANODE SPX432 ANODE ANODE Top View PART NUMBER SPX432AM .......................... 0.5% .............. 1.24V .................................. 3-Pin SOT-23 SPX432AM/TR .................... 0.5% .............. 1.24V .................................. 3-Pin SOT-23 SPX432AS ...

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