Infineon OPTIREG TLS850A4TEV50 User manual

User manual Please read the Important Notice and Warnings at the end of this document
www.infineon.com/OPTIREG-linear page 1 of 12 2023-05-25
Z8F80462613
OPTIREG™ linear voltage regulator
TLS850A4TEV50 demoboard
Z8F80462613
About this document
Scope and purpose
This document describes the usage of the OPTIREG™ linear voltage regulator TLS850A4TEV50 demoboard for
the TLS850A4TEV50 from Infineon Technologies AG. Please also refer to the corresponding datasheet for
further information on the product.
Intended audience
This document is intended for engineers who develop applications.
Support
Family
overview
Simulation

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OPTIREG™ linear voltage regulator TLS850A4TEV50 demoboard
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Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 2
1Introduction .......................................................................................................................... 3
1.1 General description.................................................................................................................................3
1.2 TLS850A4TEV50 features.........................................................................................................................3
1.3Block diagram..........................................................................................................................................4
2Demoboard ........................................................................................................................... 5
2.1 Assembly..................................................................................................................................................5
2.2 Operating conditions ..............................................................................................................................5
2.3 Configuration...........................................................................................................................................6
2.3.1 Quick start procedure ........................................................................................................................6
2.3.2 Optional additional components ......................................................................................................6
3Schematic and layout ............................................................................................................. 7
3.1 Schematic................................................................................................................................................7
3.2 Layout......................................................................................................................................................8
4Bill of materials...................................................................................................................... 9
5Restrictions..........................................................................................................................10
Revision history.............................................................................................................................11

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Introduction
1Introduction
The OPTIREG™ linear voltage regulator TLS850A4TEV50 demoboard allows for easy lab evaluation of the
TLS850A4TEV50. The demoboard is populated with the TLE850A4TEV50 in a PG-TO252-3 (DPAK) package, as
well as the standard external components and test points to allow for easy device evaluation.
1.1 General description
The OPTIREG™ linear TLS850A4TEV50 is an Infineon high performance regulator with low dropout voltage and
ultra low quiescent current. With only 4.3 μA typical quiescent current at light load and an input voltage range
of 3.7 V to 40 V the device is perfectly suitable for automotive supply systems or other supply systems that are
permanently connected to the battery.
The loop concept combines fast regulation and very high stability while requiring only one small ceramic
capacitor of 4.7 μF at the output. The operating range starts at an input voltage of 3.7 V (extended operating
range). This makes the device suitable for automotive systems that need to operate in cranking condition.
Internal protection features, such as output current limitation and overtemperature shutdown, are designed to
protect the device from immediate damage caused by failures such as
output shorted to GND
overcurrent condition
overtemperature condition
The thermally conductive package enables sustained operation despite significant dissipation across the
device.
1.2 TLS850A4TEV50 features
Ultra low quiescent current, typically 4.3 μA at light loads
Wide input voltage range from 3.7 V to 40 V
Output voltage 5 V
Output voltage accuracy ±2%
Output current capability up to 500 mA
Low dropout voltage, typically 190 mV, at output current below 100 mA
Stable with ceramic output capacitor of 4.7 μF
Overtemperature shutdown
Output current limitation
Wide temperature range
Green Product (RoHS compliant)

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Introduction
1.3 Block diagram
Figure 1 Block diagram of TLS850A4TEV50

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Demoboard
2Demoboard
2.1 Assembly
The TLS850A4TEV50 demoboard is equipped with the TLS850A4TEV50 in PG-TO252-3 and all the necessary
components. Placeholders for an optional filtering capacitor on the output and an optional overvoltage
suppressor diode on the input are available.
Figure 2 TLS850A4TEV50 demoboard
2.2 Operating conditions
To avoid electrical damage of the demoboard, the values in Table 1 must be maintained.
Table 1 Limit values for operation
1
1
The demoboard operates at an ambient temperature of 25°C
2
Functional input voltage range: 3.7 V to 40 V
Parameter
Symbol
Values
Unit
Note or condition
min
max
Board supply voltage2
VI
0
45
V
Power supply
Regulator output
VQ
0
7
V
Regulated output voltage
Ground
GND
0
0
V
System GND

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Demoboard
2.3 Configuration
The TLS850A4TEV50 demoboard is easy to use and provides a fixed output voltage of 5.0 V. No extra
configuration is required.
2.3.1 Quick start procedure
1. With the power off, connect the input power supply to I and GND.
2. Connect the load between Q and GND.
3. Turn on the power supply. Ensure that the input voltage does not exceed 45 V. Schematic and layout
2.3.2 Optional additional components
The demoboard contains additional solder pads with are not populated by default, but can be populated by the
user, if so required.
C4: optional filtering capacitor can be used to improve the transient response.
D1: optional overvoltage suppressor diode for protection against overvoltage at the input.
The breakdown of the suppressor diode need to be chosen to ensure the input voltage to the
TLS850A4TEV50 does not exceed the maximum ratings.

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Schematic and layout
3Schematic and layout
3.1 Schematic
Figure 3 TLS850A4TEV50 demoboard schematic

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Schematic and layout
3.2 Layout
T
Figure 4 TLS850A4TEV50 demoboard top layer
Figure 5 TLS850A4TEV50 demoboard bottom layer

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Bill of materials
4Bill of materials
The bill of materials shows the components for both product specific assembly variants of the demoboard. For
the mounting condition of each component see Schematic.
Table 2 Bill of material
Part
Value
Package
IC1
TLS850A4TEV50
PG-TO252-3
VIN, VOUT
Banana jack (red)
BABU4MM
GND, GND
Banana jack (black)
BABU4MM
TP_VIN, TP_VOUT
Test point
–
TP_GND
Test point
–
C1
10 μF / 50 V
E5-8,5
C2
100 nF / 50 V
C0805
C3
10 μF / 16 V
C0805
C4
Optional
C1210
D1
Optional
DO-214AC

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Restrictions
5Restrictions
This demoboard offers limited features only for evaluation and testing of Infineon products. The demoboard is
not an end product or finished appliance, nor is it intended or authorized by Infineon to be integrated into end
products. The demoboard may not be used in any production system. For further information please visit
www.infineon.com.

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Revision history
Revision history
Document
version
Date of release
Description of changes
1.00
25.05.2023
Initial release

Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2023-05-25
Z8F80462613
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2023 Infineon Technologies AG.
All Rights Reserved.
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IMPORTANT NOTICE
The information contained in this application note
is given as a hint for the implementation of the
product only and shall in no event be regarded as a
description or warranty of a certain functionality,
condition or quality of the product. Before
implementation of the product, the recipient of this
application note must verify any function and other
technical information given herein in the real
application. Infineon Technologies hereby
disclaims any and all warranties and liabilities of
any kind (including without limitation warranties of
non-infringement of intellectual property rights of
any third party) with respect to any and all
information given in this application note.
The data contained in this document is exclusively
intended for technically trained staff. It is the
responsibility of customer’s technical departments
to evaluate the suitability of the product for the
intended application and the completeness of the
product information given in this document with
respect to such application.
For further information on the product, technology,
delivery terms and conditions and prices please
contact your nearest Infineon Technologies office
(www.infineon.com).
WARNINGS
Due to technical requirements products may
contain dangerous substances. For information on
the types in question please contact your nearest
Infineon Technologies office.
Except as otherwise explicitly approved by Infineon
Technologies in a written document signed by
authorized representatives of Infineon
Technologies, Infineon Technologies’ products may
not be used in any applications where a failure of
the product or any consequences of the use thereof
can reasonably be expected to result in personal
injury.