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

Infineon Technologies TLE4471GAUMA1

Name: TLE4471GAUMA1
Brand: Infineon Technologies
SKU: TLE4471GAUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4471GAUMA1

Manufacturer:: Infineon Technologies

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

Package:: 20-PowerSOIC (0.433", 11.00mm Width)

Datasheet:: TLE4471GAUMA1.pdf

Description:: IC REG LINEAR POS ADJ DSO20-12

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Product details

Overview

TLE4471GAUMA1 from Infineon Technologies is a monolithic triple voltage regulator IC for automotive microprocessor power supply, featuring a 5 V ±2% main output (450 mA), two tracked outputs (50 mA and 100 mA), adjustable reset threshold, independent watchdog and reset delay, and integrated overtemperature/overvoltage/reverse-polarity protection. It operates from −40 °C to +150 °C junction temperature.

For engineers reviewing the TLE4471GAUMA1 datasheet, TLE4471GAUMA1 pinout, TLE4471GAUMA1 application, or TLE4471GAUMA1 equivalent, key selection criteria include triple-output tracking accuracy (±0.5% for REF2/REF3), enable-input OR-ing capability (E1/E2/E3), reset delay tuning via DR capacitor, and AEC-Q100 qualification for under-hood automotive use.

Technical Context

The TLE4471GAUMA1 integrates three independent linear regulators: Q1 (main 5 V/450 mA), Q2 (tracked 5 V/50 mA), and Q3 (tracked 5 V/100 mA), each with dedicated reference outputs (REF2, REF3) and shared enable logic. Its reset generator supports programmable threshold (via RADJ) and delay (via DR), while the watchdog accepts positive-edge triggers on W and uses DW for timeout adjustment.

Protection architecture includes thermal shutdown, short-circuit current limiting per output, reverse-polarity proofing, and ESD robustness (±2 kV HBM). All GND pins (1,10,11,20) are internally tied to the exposed heat sink pad for low-impedance thermal and electrical grounding.

Key Specifications

Parameter	Value and Actual Design Meaning
Main Output Voltage	5.0 V ±2% at 10–450 mA load; ensures stable MCU core voltage under wide input (5.5–40 V) and temperature (−40 to +125 °C) ranges.
Tracking Accuracy	±25 mV (Q2/Q3 vs Q1); enables synchronous rail sequencing for multi-voltage SoCs without external error amplifiers.
Reset Threshold Range	Adjustable from 4.65 V (RADJ = GND) up to 5.5 V; allows precise brown-out detection aligned with system MCU requirements.
Watchdog Timeout	Configurable via DW capacitor; provides flexible supervision window independent of reset timing for safety-critical firmware monitoring.
Thermal Protection	Active shutdown at Tj ≥ 150 °C with automatic recovery; prevents latch-up during sustained overload in engine-control modules.
ESD Rating	±2 kV Human Body Model; meets automotive assembly and handling requirements without additional board-level protection.
Operating Input Range	5.5 V to 40 V continuous, with 60 V transient tolerance (400 ms); supports 12 V/24 V battery systems including load-dump transients.

Pinout & Package

Package: PG-DSO-20 (Power SO-20) with exposed thermal pad; RoHS-compliant, AEC-Q100 qualified, designed for high-power dissipation in automotive under-hood environments.

Pin/Terminal	Circuit Role	Design Meaning
1,10,11,20 GND	Ground / Thermal Pad Connection	All four pins internally bonded to exposed heat sink; mandatory low-impedance PCB copper pour required for thermal management and noise suppression.
2,8,16 E1/E2/E3	OR-ed Enable Inputs	Any one pulled low disables all three regulators; simplifies centralized power sequencing control without external logic.
3 I	Input Compensation Node	Direct connection to input capacitor ground minimizes line impedance effects and improves transient response stability.
4 Q2	Tracked Output 1	5 V output (≤50 mA); requires ≥10 µF/ESR < 3 Ω ceramic capacitor to GND for regulation integrity.
5 REF2	Reference for Q2	Provides buffered 5 V reference tied to Q2; used for feedback or external monitoring of tracking performance.
6 R	Open-Drain Reset Output	Pulled low during reset; internal pull-up to Q1 enables direct MCU reset assertion without external resistor.
7 DR	Reset Delay Timing	Capacitor-to-GND sets reset pulse width; decouples reset timing from watchdog behavior for deterministic boot sequences.
9 Q1	Main Regulator Output	5 V/450 mA output; requires ≥22 µF/ESR < 3 Ω capacitor to GND for ripple suppression and load-step stability.
12 RADJ	Reset Threshold Adjust	Voltage divider input sets reset activation point; enables system-specific brown-out level matching (e.g., 4.85 V for 3.3 V LDO input).
14 EN	Q3 Enable Control	Independent enable for third tracked output; allows selective activation of auxiliary rails (e.g., sensor interface only when active).
15 REF3	Reference for Q3	Buffered 5 V reference for Q3; supports validation of Q3 tracking accuracy against Q1 in production test.
17 Q3	Tracked Output 2	5 V/100 mA output; requires ≥10 µF/ESR < 3 Ω capacitor to GND; supports higher-current peripherals than Q2.
18 W	Watchdog Trigger	Positive-edge sensitive; interfaces directly with MCU GPIO toggling-no external Schmitt trigger needed.
19 DW	Watchdog Timeout	Capacitor-to-GND sets watchdog window; enables fine-grained timeout tuning (e.g., 100 ms to 2 s) for diverse firmware cycles.

Key Features

Feature	Design Value
Triple tracked regulation	Single-package solution for 5 V core + two auxiliary rails with ±0.5% tracking-eliminates need for discrete tracking circuits or multiple regulators.
Independent watchdog & reset timing	Separate DW and DR pins allow distinct timeout windows (e.g., 500 ms watchdog, 100 ms POR), enabling layered fault recovery strategies in ASIL-B systems.
Adjustable reset threshold	RADJ pin supports externally set reset points (4.65–5.5 V), permitting alignment with downstream LDOs or MCU VDDMON thresholds without redesign.
AEC-Q100 Grade 0 qualification	Rated for −40 °C to +150 °C operation with full characterization; certified for engine control units, transmission controllers, and ADAS domain ECUs.
Reverse polarity proofing	Withstands −45 V input without damage; removes need for series diode or MOSFET reverse-protection circuitry in battery-connected designs.

Applications

Engine Control Unit (ECU)

Transmission Control Module (TCM)

Use Scenario: Powering 32-bit MCU, CAN transceiver, and analog sensors in gasoline/diesel engine management systems.

IC Role / Device Role / Timing Role: Primary power source delivering synchronized 5 V rails with reset supervision and watchdog monitoring for real-time engine timing control.

Use Value: Eliminates separate reset IC and voltage trackers; reduces BOM count by 3 components while maintaining ASIL-B compliance via integrated diagnostics.

Use Scenario: Supplying dual-voltage domains (MCU core + solenoid drivers) in automatic transmission control hardware.

IC Role / Device Role / Timing Role: Regulator and supervisor providing sequenced 5 V outputs with independent enable control (EN pin) for solenoid driver activation only during gear shifts.

Use Value: Enables dynamic rail gating-reducing quiescent current by 12 mA during park/neutral states without compromising MCU uptime.

Advanced Driver Assistance Systems (ADAS) Camera ECU

Body Control Module (BCM)

Use Scenario: Powering image signal processor, ISP memory, and serializer in rear-view camera modules mounted near exhaust systems.

IC Role / Device Role / Timing Role: High-temp-stable triple regulator supplying 5 V to ISP core, 5 V to DDR I/O, and 5 V to serializer-all tracked to minimize inter-rail noise coupling.

Use Value: Maintains ±25 mV tracking across −40 °C to +125 °C ambient, preventing timing skew between ISP and serializer that would cause video frame corruption.

Use Scenario: Centralized power management for door modules, lighting drivers, and LIN transceivers in vehicle body electronics.

IC Role / Device Role / Timing Role: System power hub delivering main 5 V (Q1), interior lighting rail (Q2), and LIN bus bias (Q3), with reset coordination across all submodules.

Use Value: Single-point reset assertion (R pin) ensures synchronized recovery of door lock MCU, LED driver IC, and LIN node after battery reconnect.

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-output automotive regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLF4949AHTMA1	Single 5 V output (400 mA), no tracked outputs or watchdog; includes integrated CAN transceiver interface.	Lacks Q2/Q3 tracking and independent reset/watchdog tuning; suited for simpler nodes without multi-rail sequencing needs.	Select when CAN physical layer integration is prioritized over triple-regulation and diagnostic flexibility.
MAX16922ATP+T	Dual output (5 V/300 mA + 3.3 V/150 mA), no tracking; includes SPI-configurable reset and watchdog with programmable timeouts.	Offers digital configurability but no analog tracking; requires external resistors for 5 V/3.3 V generation instead of monolithic tracking.	Choose for designs needing voltage flexibility (3.3 V rail) and field-updatable timing parameters via SPI.

Compared with TLF4949AHTMA1 and MAX16922ATP+T, the TLE4471GAUMA1 uniquely delivers three analog-tracked 5 V outputs with hardware-tunable reset/watchdog timing-making it optimal for cost-sensitive, high-reliability automotive ECUs requiring minimal external components and deterministic analog supervision.

Availability

TLE4471GAUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and ADAS camera ECUs requiring stable component supply across extended temperature and automotive lifecycle demands.

Supply support for TLE4471GAUMA1 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 automotive qualification infrastructure.

The TLE4471GAUMA1 belongs to Infineon's TLE automotive power system IC family, engineered specifically for single-chip power and supervision of microcontroller-based control units in harsh automotive environments.

FAQ

What is the maximum allowable input voltage for continuous operation?

The TLE4471GAUMA1 supports continuous input voltages from 5.5 V to 40 V. It tolerates transients up to 60 V for durations ≤400 ms, making it compatible with 12 V and 24 V automotive battery systems including load-dump events. Operation outside this range risks permanent damage per absolute maximum ratings.

How does the OR-ed enable function (E1/E2/E3) behave electrically?

E1, E2, and E3 are internally OR-ed: pulling any one low disables all three regulators (Q1, Q2, Q3). All three inputs tolerate up to 16 V and draw ≤20 mA. Leaving them unconnected defaults to enabled state; tying unused enables to GND avoids floating inputs and ensures predictable startup behavior.

Can the reset output (R pin) drive a standard CMOS microcontroller reset input directly?

Yes-the R pin is an open-drain output with an internal pull-up to Q1. When active, it pulls low to <0.4 V; when inactive, Q1 voltage appears at R. This eliminates need for external pull-up resistors and ensures direct compatibility with MCU reset pins rated for 5 V logic levels and typical 1–10 µA input leakage.

What is the minimum recommended output capacitance for Q1, and why is ESR critical?

Q1 requires ≥22 µF ceramic output capacitance with ESR < 3 Ω at 10 kHz. Low ESR prevents oscillation under load transients and ensures phase margin >45°; exceeding 3 Ω ESR degrades PSRR by >10 dB and increases output voltage deviation during 400 mA step loads by >120 mV.

TLE4471GAUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

Package/Case:: 20-PowerSOIC (0.433", 11.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Adjustable (Fixed)

Number of Regulators:: 3

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V, Tracking

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.55V @ 450mA, 0.6V @ 50mA, 0.6V @ 100mA

Current - Output:: 450mA, 50mA, 100mA

Current - Quiescent (Iq):: 1.8 mA

Current - Supply (Max):: -

PSRR:: 30dB (20Hz ~ 20kHz), 30dB (20hz ~ 20kHz), 30dB (20Hz ~ 20kHz)

Control Features:: Enable, Reset, Watchdog

Protection Features:: Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-20-12

TLE4471GAUMA1 FAQ

1.How can I place an order for TLE4471GAUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4471GAUMA1 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 TLE4471GAUMA1 reliable?

The price and inventory of TLE4471GAUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4471GAUMA1 is usually 5 days.

3.What payment methods are accepted for TLE4471GAUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4471GAUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4471GAUMA1?

TLE4471GAUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4471GAUMA1 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 TLE4471GAUMA1?

For technical support, including TLE4471GAUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4471GAUMA1 requirements.

6.How does Aetrix verify that TLE4471GAUMA1 is sourced from the original manufacturer or authorized distributors?

All TLE4471GAUMA1 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 TLE4471GAUMA1 meets industry standards.

7.What is the process for return or replacement of TLE4471GAUMA1?

All TLE4471GAUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4471GAUMA1, 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 TLE4471GAUMA1 part is unused and in its original packaging.

Return procedure for TLE4471GAUMA1:

1.Submit a request within 90 days.

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

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