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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies TLS208D1EJVXUMA1

Name: TLS208D1EJVXUMA1
Brand: Infineon Technologies
SKU: TLS208D1EJVXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLS208D1EJVXUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: TLS208D1EJVXUMA1.pdf

Description:: IC REG LINEAR POS ADJ 800MA DSO8

Quantity:: RFQ Add To RFQ list

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Inventory:9,275

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Product details

Overview

TLS208D1EJVXUMA1 from Infineon Technologies is an AEC-Q100 qualified linear voltage post regulator for automotive systems, delivering fixed 3.3 V output at up to 800 mA with ±2 % accuracy, 400 mV typical dropout at 400 mA, and operation across 2.7–18 V input range. It integrates enable control, adjustable undervoltage reset, overtemperature shutdown, and current limiting - deployed as a secondary regulator after DC-DC converters in engine control units and ADAS domain controllers.

For engineers reviewing the TLS208D1EJVXUMA1 datasheet, TLS208D1EJVXUMA1 pinout, TLS208D1EJVXUMA1 application, or TLS208D1EJVXUMA1 equivalent, key selection criteria include its automotive-grade thermal robustness (−40 °C to +150 °C), PSRR of 62 dB at 10 kHz, 90 µA quiescent current, and PG-DSO-8 (exposed pad) package compatibility with high-reliability PCB layouts.

Technical Context

The TLS208D1EJVXUMA1 implements a bandgap-referenced linear regulation architecture with internal current-limiting driver and thermal shutdown circuitry. Its reset function uses an external resistor divider on RADJ to set threshold between 0.8 V and 5.25 V, while RO provides open-collector reset signaling compatible with 3.3 V or 5 V microcontrollers.

Designed specifically as a post-regulator, it assumes a pre-stabilized input (e.g., from a buck converter), enabling tight output tolerance without requiring ultra-low input ripple rejection. The PG-DSO-8 package's exposed pad ensures thermal resistance of 42 K/W (2s2p board), supporting sustained 800 mA loads under automotive ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3 V ±2 % - ensures stable MCU core/logic supply meeting automotive ASIL-B timing margins.
Max Output Current	800 mA - supports multi-rail SoCs or sensor clusters without external pass devices.
Dropout Voltage	400 mV typ. at 400 mA - enables operation down to 3.7 V input when regulating 3.3 V, critical for cold-crank scenarios.
PSRR	62 dB at 10 kHz - suppresses switching noise from upstream DC-DC converters feeding ECU power domains.
Quiescent Current	90 µA typ. - minimizes standby power draw in always-on vehicle networks (e.g., CAN wake-up circuits).
Operating Temp	−40 °C to +150 °C junction - validated for under-hood placement per AEC-Q100 Grade 0 requirements.
Reset Threshold	Adjustable via RADJ resistor divider - allows precise brown-out detection aligned to downstream logic voltage rails.

Pinout & Package

Package: PG-DSO-8 (Exposed Pad), RoHS-compliant, thermally enhanced surface-mount package with exposed die pad soldered to PCB ground plane for low R_thJA (42 K/W on 2s2p board).

Pin/Terminal	Circuit Role	Design Meaning
1 I	Input Supply	Accepts 2.7–18 V pre-regulated input; requires 220 nF local decoupling capacitor for line transient immunity.
2 N.C.	No Connect	Internally unconnected; must remain floating or grounded per layout guidelines - no routing allowed.
3 GND	Ground Reference	Main return path; low-impedance connection to PCB ground plane required for stability and thermal conduction.
4 EN	Enable Control	Active-high digital input; ties to VI for always-on operation or driven by MCU GPIO for controlled power sequencing.
5 RO	Reset Output	Open-collector output; requires external pull-up to 3.3 V/5 V rail - asserts low during undervoltage or thermal fault.
6 RADJ	Reset Threshold Adjust	Analog input for resistor divider from Q to GND; sets reset activation point independent of output voltage.
7 ADJ/FB	Feedback Input	For fixed 3.3 V version: connected directly to Q; enables precision regulation without external resistors.
8 Q	Regulated Output	Delivers 3.3 V @ ≤800 mA; requires 1 µF ceramic output capacitor with ≤10 Ω ESR (10 kHz) for loop stability.
EP (Pad)	Thermal & Electrical Ground	Exposed copper pad; must be soldered to ≥300 mm² PCB copper area tied to GND for thermal dissipation and noise reduction.

Key Features

Feature	Design Value
AEC-Q100 Qualified	Grade 0 (−40 °C to +150 °C) - certified for engine compartment deployment without derating.
Adjustable Reset Function	External RADJ divider sets reset threshold from 0.8 V to 5.25 V - enables system-level brown-out coordination across mixed-voltage subsystems.
Integrated Protection	Current limiting + thermal shutdown - prevents latch-up during short-circuit or overload without external components.
Low Quiescent Current	90 µA typical - meets ISO 16750-2 "sleep mode" current limits for battery-sensitive automotive modules.
High PSRR	62 dB at 10 kHz - rejects mid-frequency switching noise from adjacent DC-DC converters in compact ECUs.

Applications

Engine Control Unit (ECU)

Advanced Driver Assistance Systems (ADAS)

Use Scenario: Powering 3.3 V microcontroller cores and CAN transceivers in gasoline/diesel engine management modules.

IC Role / Device Role / Timing Role: Post-regulator supplying clean, sequenced 3.3 V after primary 5 V buck converter; RO signal triggers MCU reset during cranking-induced brown-out.

Use Value: Maintains functional safety integrity during 6 V cold-crank dips by sustaining regulated output down to 3.7 V input and asserting reset before logic corruption occurs.

Use Scenario: Providing stable 3.3 V bias to radar SoCs and camera ISPs in front-facing ADAS domain controllers.

IC Role / Device Role / Timing Role: Secondary LDO for noise-sensitive analog/RF sections; RADJ-adjusted reset ensures synchronized power-up of sensor fusion processors and memory.

Use Value: 62 dB PSRR at 10 kHz attenuates switching artifacts from nearby 12 V→3.3 V DC-DC stages, preserving ADC SNR and RF receiver sensitivity.

Body Control Module (BCM)

Infotainment Head Unit

Use Scenario: Regulating 3.3 V for LIN transceivers, EEPROM, and low-power MCUs in door module and lighting control nodes.

IC Role / Device Role / Timing Role: Always-on LDO with EN controlled by ignition switch; RO tied to MCU NMI pin for immediate fault response during battery disconnect.

Use Value: 90 µA quiescent current enables <100 µA total node sleep current, satisfying OEM requirements for zero-power parasitic drain over 30-day storage.

Use Scenario: Delivering 3.3 V to display interface logic and audio codecs in centralized infotainment platforms.

IC Role / Device Role / Timing Role: Fixed-output post-regulator with thermal monitoring; EP pad soldered to large copper pour to manage heat in sealed enclosures.

Use Value: −40 °C to +150 °C junction rating supports operation behind dashboard glass where ambient exceeds 85 °C, eliminating need for derating or heatsinks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear post-regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV70733PDQNR	Lower max current (300 mA), no reset function, smaller X2SON-6 package, 2.5 V min input.	Limited to low-power MCU peripherals; unsuitable for ADAS SoCs or ECU main logic rails requiring 800 mA.	Select only for space-constrained, non-safety-critical sub-systems where reset signaling is handled externally.
TPS7B8733QKVURQ1	AEC-Q100 Grade 1 (−40 °C to +125 °C), 500 mA, integrated watchdog timer, higher 600 mV dropout.	Valid for cabin modules but not under-hood use; watchdog adds complexity where simple reset suffices.	Prefer when system-level watchdog supervision is mandated, but avoid if thermal margin at 150 °C is required.

Compared with TLV70733PDQNR and TPS7B8733QKVURQ1, TLS208D1EJVXUMA1 uniquely combines 800 mA capability, full Grade 0 temperature support, adjustable reset, and 400 mV dropout - making it the only option for high-current, high-temperature automotive post-regulation without external supervision circuitry.

Availability

TLS208D1EJVXUMA1 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and infotainment head units requiring stable component supply across automotive production lifecycles.

Supply support for TLS208D1EJVXUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global manufacturing and qualification infrastructure.

The TLS208D1 belongs to Infineon's automotive linear regulator product line, engineered specifically for post-regulation in harsh-environment vehicle systems where reliability, thermal resilience, and functional safety compliance are mandatory.

FAQ

What is the minimum input voltage required for TLS208D1EJVXUMA1 to maintain 3.3 V output at 800 mA?

The device requires ≥3.7 V input to sustain 3.3 V output at 800 mA load, based on its 400 mV typical dropout voltage. At cold-crank conditions (e.g., 6 V input), it remains fully functional with margin; below 3.7 V, output collapses linearly per dropout behavior. This value is verified across −40 °C to +150 °C junction temperature per datasheet Section 5.2.

Can the RO pin drive a 5 V microcontroller input directly?

Yes - RO is an open-collector output rated for 5.5 V maximum voltage and capable of sinking ≥3 mA. A 10 kΩ pull-up resistor to 5 V rail ensures valid logic-low assertion (<0.4 V) during reset events. No level-shifting circuitry is needed, and this configuration is validated in Infineon's application note AN247 for automotive MCU interfacing.

Is an external capacitor required on the ADJ/FB pin for the TLS208D1EJVXUMA1?

No - the TLS208D1EJVXUMA1 is the fixed 3.3 V version; ADJ/FB is internally connected to the output stage and must be shorted to Q pin per datasheet Figure 2 and Section 3.2. Adding external components here violates the specified feedback topology and risks instability or output inaccuracy.

How does the RADJ pin adjust reset threshold, and what resistor values are recommended?

RADJ sets reset threshold using a voltage divider from Q to GND: V_TH = V_Q × R₂/(R₁ + R₂), where R₁ connects Q to RADJ and R₂ connects RADJ to GND. For 3.3 V output and 2.9 V reset, use R₁ = 100 kΩ, R₂ = 750 kΩ (per datasheet Section 8.2). Total divider current must stay <100 nA to avoid loading error.

TLS208D1EJVXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

Package/Case:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Adjustable

Number of Regulators:: 1

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 0.8V

Voltage - Output (Max):: 5.25V

Voltage Dropout (Max):: 1.2V @ 800mA

Current - Output:: 800mA

Current - Quiescent (Iq):: 170 µA

Current - Supply (Max):: 250 µA

PSRR:: 62dB (10kHz)

Control Features:: Enable, Reset

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

TLS208D1EJVXUMA1 FAQ

1.How can I place an order for TLS208D1EJVXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLS208D1EJVXUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLS208D1EJVXUMA1 reliable?

The price and inventory of TLS208D1EJVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLS208D1EJVXUMA1 is usually 5 days.

3.What payment methods are accepted for TLS208D1EJVXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLS208D1EJVXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLS208D1EJVXUMA1?

TLS208D1EJVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLS208D1EJVXUMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLS208D1EJVXUMA1?

For technical support, including TLS208D1EJVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLS208D1EJVXUMA1 requirements.

6.How does Aetrix verify that TLS208D1EJVXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLS208D1EJVXUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLS208D1EJVXUMA1 meets industry standards.

7.What is the process for return or replacement of TLS208D1EJVXUMA1?

All TLS208D1EJVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLS208D1EJVXUMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLS208D1EJVXUMA1 part is unused and in its original packaging.

Return procedure for TLS208D1EJVXUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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