Infineon TLS820F3ELVxx User manual

OPTIREG™linear voltage regulator TLS820F3ELVxx
demoboard
Z8F68163446
Preface
Scope and purpose
This document describes the usage of the OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard for
the TLS820F3ELV33 and TLS820F3ELV50 from Infineon Technologies AG. Please also refer to the corresponding
datasheets.
Intended audience
This document is intended for engineers who develop applications.
User manual Please read the sections "Important notice" and "Warnings" at the end of this document Rev. 1.0
www.infineon.com/OPTIREG-linear 2020-02-26

Table of contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 TLS820F3ELV33 and TLS820F3ELV50 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Demoboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.1 EN selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.2 RADJ selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.3 Signal adaption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Schematic and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2 Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
Z8F68163446
Table of contents
User manual 2 Rev. 1.0
2020-02-26

1 Introduction
1.1 General description
The TLS820F3ELV33 and TLS820F3ELV50 are monolithic integrated low drop out voltage regulators for loads up
to 200 mA in a PG-SSOP-14 package. With an input voltage range of 3 V to 42 V and very low quiescent current
of only 26 µA, these devices are perfectly suitable for automotive or other supply systems connected to the
battery permanently. Both variants provide an output voltage accuracy of ±2%.
The loop concept combines fast regulation and very good stability while requiring only one small ceramic
capacitor of 1 µF at the output. The operating range starts already at an input voltage of only 3 V (extended
operating range). This makes the devices also suitable to supply automotive systems that need to operate
during cranking condition.
Additional features include:
• switching the device on and o via enable
• reset circuit to supervise the output voltage and delay the reset at power-on with an adjustable lower reset
threshold
• watchdog circuit to monitor a microcontroller
• shared external delay capacitor to set both reset timing and watchdog timing
• output current limitation
• thermal shutdown
1.2 TLS820F3ELV33 and TLS820F3ELV50 features
• Output voltage 5 V and 3.3 V ±2%
• Current capability 200 mA
• Input voltage range from 3 V to 42 V
• Stable with 1 μF ceramic output capacitor
• Ultra low current consumption: typically 26 μA
• Very low drop out voltage: typically 100 mV at 100 mA
• Watchdog circuit for monitoring a microprocessor
• Watchdog inhibit
• Reset circuit supervises the output voltage
- Programmable undervoltage reset threshold: minimum 2.5 V
- Programmable delay time
• Separate outputs for reset and watchdog
• Enable
• Output current limitation
• Overtemperature shutdown
• Automotive temperature range Tj= -40°C to 150°C
• Green Product (RoHS compliant)
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
Z8F68163446
1 Introduction
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1.3 Block diagram
Bandgap
Reference
GND
Q
I
Temperature
Shutdown
EN
Enable
RO
RADJ
WINH
WO
Current
Limitation
WI
D
Reset &
Watchdog
Generator
Figure 1 Block diagram TLS820F3ELVxx
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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1 Introduction
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2 Demoboard
2.1 Assembly
There are two dierent demoboard assemblies available. One for the TLS820F3ELV33 and one for the
TLS820F3ELV50. They dier only by the resistor divider values on the RADJ pin, see Table 2.
Figure 2 Assembly TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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2 Demoboard
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2.2 Operating conditions
To avoid electrical damage of the demoboard, the values in Table 1 must be maintained.
Table 1 Limit values for operation1)
Parameter Symbol2
)
Values Unit Note or condition
Min. Typ. Max.
Board supply voltage VIN 0 – 42 V –
Output voltage VQ-0.3 – 7 V 3)
Output current IQ0 – 200 mA Limited by overcurrent protection
Enable VEN 0 – 42 V
Watchdog inhibit VWINH -0.3 – 7 V 3)
Watchdog output VWO -0.3 – 7 V 3)
Watchdog input VWI -0.3 – 7 V 3)
Reset output VRO -0.3 – 7 V 3)
Ground voltage VGND 0 – 0 V –
1) TA= 25°C.
2) Symbols refer to the connectors of the demoboard.
3) Absolute maximum rating.
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2 Demoboard
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2.3 Configuration
The demoboard can be easily configured via jumpers on the board.
The board provides the following configuration options:
• connect the enable signal EN to VIN or to GND with a jumper
• connect the RADJ pin to GND with a jumper to select the default reset thresholds
2.3.1 EN selection
The EN pin can be connected to either GND or to VIN by placing a jumper as shown in Figure 3. The EN pin is
always connected to the external banana-plug. If the jumper is placed, then do not connect an external signal
to EN.
Figure 3 EN jumper (le: EN to VIN; right: EN to GND)
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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2 Demoboard
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2.3.2 RADJ selection
The TLS820F3ELVxx features adjustable reset thresholds. By applying a voltage divider between the Q pin and
the RADJ-pin. The demoboard resistors R4 and R7 set the reset adjust threshold, see Figure 4. There are two
dierent assemblies of these resistors, one for the TLS820F3ELV33 and one for the TLS820F3ELV50, see Table
2. Equation 1 gives the formula for calculating the reset threshold. Placing the jumper as shown in Figure 5
connects the RADJ to GND and sets the default reset thresholds as shown in the datasheet. The jumper shorts
resistor R7 and causes a small permanent current through R4.
Figure 4 RADJ resistor divider schematic
Table 2 RADJ resistor divider assembly
Variant R4 R7 VRT,lo
TLS820F3ELV33 9.4 kΩ 4.7 kΩ 2.7 V
TLS820F3ELV50 16.2 kΩ 4.7 kΩ 4 V
VRT,lo =VRADJ,th ×R4+R7
R7≈0.9×R4+R7 R7
Equation 1 VRT,lo calculation
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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2 Demoboard
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Figure 5 RADJ jumper
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2 Demoboard
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2.3.3 Signal adaption
For easy signal adaption, for example connecting probes of an oscilloscope, test points are scattered across the
PCB. The label of each test point indicates the probed signal. For further information on the mapping between
test points and signals see Figure 7. The GND clip of the probe can be attached to one of several ground hooks
as shown in Figure 6.
Figure 6 Testpoint and GND hook example
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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2 Demoboard
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3 Schematic and layout
3.1 Schematic
The schematic for the TLS820F3ELV50 is assembled with two dierent configurations for the resistors R4 and
R7, depending on whether the TLS820F3ELV33 or TLS820F3ELV50 is mounted, see Table 2 for details. Not
mounted parts are optional and marked with a red cross.
Figure 7 Schematic TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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3 Schematic and layout
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3.2 Layout
The PCB uses a four layer standard stack-up. The product can also be soldered to double layer boards.
However, four layers oer better thermal characteristics. The configuration on this demoboard is comparable to
the 2s2p thermal interface situation.
Figure 8 Top layer and components TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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3 Schematic and layout
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Figure 9 Internal layer 1 TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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3 Schematic and layout
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Figure 10 Internal layer 2 TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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3 Schematic and layout
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Figure 11 Bottom layer TLS820F3ELV50
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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3 Schematic and layout
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4 Bill of materials
The bill of materials shows the components on the TLS820F3ELV50. For the mounting condition of each
component see Figure 7 and Figure 8. Mechanical parts, such as connectors or test-points are not mentioned.
Table 2 shows the configuration for resistors R4 and R7.
Table 3 Bill of materials TLS820F3ELV50
Part Value Package
D1 US1B-E3/61T DO-214
C2 47 μF / 50 V n.a.
C3 10 μF / 50 V 1206
C4 100 nF / 50 V 0603
C5 1 μF / 16 V 0603
C7 10 nF / 50 V 0603
R1, R5, R6, R9 0 Ω0603
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4 Bill of materials
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5 Restrictions
This demoboard oers 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.
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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5 Restrictions
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6 Revision history
Revision Date Changes
1.0 2020-02-26 Document created.
OPTIREG™linear voltage regulator TLS820F3ELVxx demoboard
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6 Revision history
User manual 18 Rev. 1.0
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Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2020-02-26
Published by
Infineon Technologies AG
81726 Munich, Germany
©2022 Infineon Technologies AG
All Rights Reserved.
Do you have a question about any
aspect of this document?
Email: [email protected]om
Document reference
IFX-Z8F68163446
Important notice
The information given in this document shall in no
event be regarded as a guarantee of conditions or
characteristics (“Beschaenheitsgarantie”).
With respect to any examples, hints or any typical
values stated herein and/or any information regarding
the application of the product, 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.
In addition, any information given in this document is
subject to customer’s compliance with its obligations
stated in this document and any applicable legal
requirements, norms and standards concerning
customer’s products and any use of the product of
Infineon Technologies in customer’s applications.
The data contained in this document is exclusively
intended for technically trained sta. 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.
Warnings
Due to technical requirements products may contain
dangerous substances. For information on the types
in question please contact your nearest Infineon
Technologies oice.
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.