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

Infineon Technologies TLE4473GV52AUMA1

Name: TLE4473GV52AUMA1
Brand: Infineon Technologies
SKU: TLE4473GV52AUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4473GV52AUMA1

Manufacturer:: Infineon Technologies

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

Package:: 12-BSOP (0.295", 7.50mm Width) Exposed Pad

Datasheet:: TLE4473GV52AUMA1.pdf

Description:: IC REG LINEAR FIXED LDO REG

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLE4473GV52AUMA1 from Infineon Technologies is a dual low-dropout voltage regulator IC for automotive microcontroller and sensor power supply, delivering 300 mA at 2.6 V (±3%) on Q1 and 180 mA at 5 V (±2%) on Q2, with independent inhibit control, watchdog supervision on Q1, and dual reset outputs - deployed in engine control units and body electronics.

For engineers reviewing the TLE4473GV52AUMA1 datasheet, TLE4473GV52AUMA1 pinout, TLE4473GV52AUMA1 application, or TLE4473GV52AUMA1 equivalent, key selection criteria include output voltage configuration (2.6 V/5 V), watchdog-enabled reset timing on RO1, independent INH1/INH2 disable logic, and PG-DSO-12 thermal performance up to 150 °C junction temperature.

Technical Context

The device integrates two LDO regulators with separate bandgap references, overtemperature shutdown, short-circuit protection, and dual independent reset generators - one (RO1) combined with a positive-edge-triggered watchdog input (WI) for microcontroller supervision, the other (RO2) dedicated to Q2 output monitoring. Each reset delay is set externally via capacitors on D1 and D2 pins.

Input voltage range spans 5.6 V to 42 V; quiescent current drops below 1 µA when both outputs are disabled. The 2.6 V Q1 output targets MCU core supply, while the 5 V Q2 output powers I/O peripherals or sensors - both regulated with ±2–3% accuracy across -40 °C to 150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Q1 Output Voltage	2.6 V ±3% - stable core supply for automotive microcontrollers under load and temperature variation
Q2 Output Voltage	5 V ±2% - precise I/O or sensor rail compatible with standard automotive logic interfaces
Q1 Max Output Current	300 mA - sufficient for 32-bit MCU cores with transient peak demands
Q2 Max Output Current	180 mA - supports multiple peripheral drivers or analog front-ends
Input Voltage Range	5.6 V to 42 V - accommodates cold-crank (5.6 V) and load-dump (42 V) transients in 12 V automotive systems
Quiescent Current (Both Disabled)	< 1 µA - enables ultra-low-power sleep mode in always-on vehicle modules
Junction Temperature Range	-40 °C to 150 °C - qualified for under-hood placement without derating

Pinout & Package

Package: PG-DSO-12 (exposed thermal pad, RoHS-compliant, surface-mount).

Pin/Terminal	Circuit Role	Design Meaning
1 WI	Watchdog input	Positive-edge-triggered signal from MCU to prevent RO1 reset during normal operation
2 RO2	Reset output for Q2	Open-collector output asserting low when Q2 voltage falls below 4.5 V threshold
3 RO1	Reset & watchdog output for Q1	Open-collector output combining power-on reset and watchdog timeout behavior for MCU core
4 Q2	Main 5 V output	Regulated 5 V supply requiring ≥22 µF low-ESR capacitor for stability
5 Q1	Core 2.6 V output	Regulated 2.6 V supply requiring ≥10 µF low-ESR capacitor
6 N.C.	No connect	Internally unused; must be connected to GND for thermal and EMI integrity
7 I	Input voltage	Primary supply input; requires local ceramic decoupling at IC pin
8 INH1	Inhibit 1	Active-low enable/disable control for both Q1 and Q2 outputs
9 INH2	Inhibit 2	Active-low enable/disable control for Q2 only - enables independent power gating
10 D2	Reset delay 2	Capacitor connection point setting power-on reset delay time for Q2 (RO2)
11 D1	Reset delay 1 / watchdog timing	Capacitor connection point setting both Q1 reset delay and watchdog timeout period (TWI,tr)
12 GND	Ground / heatsink	Power and signal reference; exposed pad must be soldered to PCB ground plane for thermal conduction

Key Features

Feature	Design Value
Dual independent inhibit inputs	INH1 disables both outputs; INH2 disables only Q2 - enabling flexible power sequencing in multi-rail systems
Integrated watchdog on Q1	WI pin accepts MCU-generated pulses; absence triggers RO1 reset - eliminating need for external watchdog IC
Two programmable reset delays	D1 and D2 pins accept external capacitors to set custom power-on reset durations for Q1 and Q2 independently
Automotive-grade protection suite	Short-circuit, overload, and overtemperature protection - all latching or auto-recovering per internal design, not requiring external circuitry
Ultra-low standby current	< 1 µA total quiescent draw with both outputs disabled - critical for ISO 26262-compliant sleep-mode compliance

Applications

Engine Control Unit (ECU)

Body Control Module (BCM)

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

IC Role / Device Role / Timing Role: Dual-regulator supplying 2.6 V to MCU core and 5 V to CAN PHY and sensor interfaces; RO1 reset synchronizes MCU boot with stable core voltage and watchdog supervision.

Use Value: Eliminates discrete reset IC and external watchdog, reducing BOM count while meeting ASIL-B functional safety requirements for startup integrity.

Use Scenario: Supplying door module MCU, LIN transceiver, and position sensors in 12 V battery-powered body electronics.

IC Role / Device Role / Timing Role: Q1 powers MCU core; Q2 powers LIN PHY and analog sensors; INH2 allows selective shutdown of 5 V rail during sleep while retaining 2.6 V for RTC and wake-up logic.

Use Value: Enables <1 µA system standby current via coordinated inhibit control - extending battery life in always-on modules.

Advanced Driver Assistance System (ADAS) Camera ECU

Electric Power Steering (EPS) Control Unit

Use Scenario: Regulating image sensor and ISP processor rails in rear-view or surround-view camera modules.

IC Role / Device Role / Timing Role: Q1 (2.6 V) supplies ISP core; Q2 (5 V) powers image sensor analog front-end; RO2 monitors sensor rail health independently.

Use Value: Dual reset outputs provide fault-isolated diagnostics - allowing camera ECU to distinguish between core failure (RO1 low) and sensor supply failure (RO2 low).

Use Scenario: Powering torque controller MCU and motor gate driver bias supplies in EPS systems.

IC Role / Device Role / Timing Role: Q1 supplies 2.6 V to safety MCU; Q2 supplies 5 V to isolated gate driver ICs; watchdog on RO1 ensures MCU executes safety routines within defined time windows.

Use Value: Integrated watchdog meets ISO 26262 timing constraint requirements for ASIL-C path monitoring without external timing components.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV70733PDPKR	Single 3.3 V output, 300 mA, no watchdog or second output; SOT-23-5 package	Lacks Q2 5 V rail and RO2 reset - unsuitable for dual-rail systems requiring independent monitoring	Select only if application uses only 3.3 V MCU core and external 5 V generation
MAX16910ATP+	Dual output (3.3 V/5 V), 250 mA/150 mA, integrated watchdog, but operates up to 28 V input only	Not rated for 42 V load-dump - requires external TVS or clamping for full automotive transients	Consider only for 24 V commercial vehicle designs with controlled input clamping

Compared with TLV70733PDPKR and MAX16910ATP+, the TLE4473GV52AUMA1 uniquely combines 42 V input tolerance, dual independent resets, and watchdog supervision in a single PG-DSO-12 package - making it the only option qualified for direct integration into unclamped 12 V automotive ECU power trees.

Availability

TLE4473GV52AUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering systems requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLE4473GV52AUMA1 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 expertise.

The TLE4473 belongs to Infineon's TLE automotive power system IC family, designed specifically for robust, integrated power supply and supervision in engine, transmission, and chassis control units operating under harsh automotive environments.

FAQ

What is the function of the WI (pin 1) input?

The WI (Watchdog Input) pin is a positive-edge-triggered input that resets the internal discharge cycle of capacitor CD1. When a rising edge occurs during the watchdog timeout period, CD1 recharges and RO1 remains high - preventing unintended MCU reset. This enables software-controlled supervision of MCU execution timing without external components.

Can the TLE4473GV52AUMA1 be used with a 24 V truck battery system?

Yes - the device supports input voltages up to 42 V, covering both 12 V and 24 V automotive battery systems including load-dump transients. Its absolute maximum rating of 45 V and operating range up to 42 V make it suitable for heavy-duty vehicle applications without additional input clamping.

How is the reset delay time set for Q1 and Q2 outputs?

Reset delay for Q1 is set by capacitor CD1 on pin D1; for Q2, by capacitor CD2 on pin D2. Delay time follows t_D = (V_DU – V_DL) × C / I_DC, where V_DU and V_DL are internal thresholds and I_DC is a fixed internal current source - enabling precise, temperature-stable delay tuning with standard capacitors.

Is the exposed thermal pad (pin 12) required to be connected to ground?

Yes - the exposed pad is electrically connected to GND and serves as the primary thermal path. It must be soldered to a PCB copper pour tied to system ground to achieve specified R_thj-a of 48 K/W (with 600 mm² heatsink area) and ensure reliable operation at 150 °C junction temperature.

TLE4473GV52AUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 12-BSOP (0.295", 7.50mm Width) Exposed Pad

Packaging:: Bulk

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 2

Voltage - Input (Max):: 42V

Voltage - Output (Min/Fixed):: 2.6V, 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.6V @ 100mA

Current - Output:: 300mA, 180mA

Current - Quiescent (Iq):: 165 µA

Current - Supply (Max):: 20 mA

PSRR:: 65dB (100Hz), 65dB (100Hz)

Control Features:: Inhibit, Reset, Watchdog

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

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-12-11

TLE4473GV52AUMA1 FAQ

1.How can I place an order for TLE4473GV52AUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4473GV52AUMA1 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 TLE4473GV52AUMA1 reliable?

The price and inventory of TLE4473GV52AUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4473GV52AUMA1 is usually 5 days.

3.What payment methods are accepted for TLE4473GV52AUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4473GV52AUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4473GV52AUMA1?

TLE4473GV52AUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4473GV52AUMA1 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 TLE4473GV52AUMA1?

For technical support, including TLE4473GV52AUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4473GV52AUMA1 requirements.

6.How does Aetrix verify that TLE4473GV52AUMA1 is sourced from the original manufacturer or authorized distributors?

All TLE4473GV52AUMA1 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 TLE4473GV52AUMA1 meets industry standards.

7.What is the process for return or replacement of TLE4473GV52AUMA1?

All TLE4473GV52AUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4473GV52AUMA1, 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 TLE4473GV52AUMA1 part is unused and in its original packaging.

Return procedure for TLE4473GV52AUMA1:

1.Submit a request within 90 days.

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

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