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

Infineon Technologies IFX21003TNV51AKSA1

Name: IFX21003TNV51AKSA1
Brand: Infineon Technologies
SKU: IFX21003TNV51AKSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX21003TNV51AKSA1

Manufacturer:: Infineon Technologies

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

Package:: TO-220-5

Datasheet:: IFX21003TNV51AKSA1.pdf

Description:: IC REG LINEAR 5V/15V TO220-5

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Product details

Overview

IFX21003TNV51AKSA1 from Infineon Technologies is a dual-output monolithic voltage regulator delivering regulated 5 V (100 mA max) and 15 V (30 mA max) outputs from a single input, operating across 20–40 V continuous input range with peak tolerance up to 60 V. It integrates overtemperature shutdown, output current limiting on both rails, and thermal-optimized PG-TO220-5 packaging for automotive body electronics and industrial control systems requiring isolated logic and gate-drive supplies.

For engineers reviewing the IFX21003TNV51AKSA1 datasheet, IFX21003TNV51AKSA1 pinout, IFX21003TNV51AKSA1 application, or IFX21003TNV51AKSA1 equivalent, key selection criteria include dual-rail accuracy (±2.5% for 5 V, ±4% for 15 V), dropout behavior under simultaneous load, thermal resistance (R_thJC = 4.1 K/W at 2 W), and compatibility with ceramic output capacitors (≥1.0 µF, ESR ≤5 Ω).

Technical Context

This regulator implements two independent linear regulation stages-Q1 (5 V) and Q2 (15 V)-each with dedicated bandgap reference, error amplifier, and pass transistor. Both outputs feature internal current limiting triggered at nominal voltage minus 100 mV and maintain regulation across -40 °C to +150 °C junction temperature.

The device uses a shared input stage with separate feedback loops and protection circuitry including a common overtemperature shutdown (TSD) block that disables both outputs when T_j exceeds safe limits. Input voltage handling is segmented: Q1 operates down to 12 V, while full dual-output functionality requires ≥20 V input.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Q1 Voltage	5.00 V ±2.5% (4.85–5.15 V at 80 mA, 25 °C); supports microcontroller core/logic supply with tight tolerance
Output Q2 Voltage	15.0 V ±4% (14.4–15.6 V at 15 mA, 25 °C); targets high-side MOSFET gate drivers requiring stable bias
Max Output Current	100 mA on Q1, 30 mA on Q2; defines maximum compatible load without foldback or shutdown
Input Voltage Range	20–40 V continuous, 60 V peak (400 ms); enables direct connection to 24 V industrial or 36 V automotive battery rails
Quiescent Current	700–1000 μA (no load), ≤3.5 mA (full load); critical for low-power standby modes in always-on systems
Thermal Resistance	R_thJC = 4.1 K/W (zener active); ensures ≤8.2 °C rise at 2 W dissipation with proper heatsinking
Protection Features	Overtemperature shutdown, per-rail current limiting, HBM ESD rating ≥2 kV; prevents destruction during fault conditions

Pinout & Package

IFX21003TNV51AKSA1 is housed in a PG-TO220-5 package with integrated heat sink tab electrically connected to Pin 3 (GND). The package provides low thermal resistance and mechanical robustness for high-reliability mounting on metal chassis or PCB copper pours.

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input voltage supply	Primary DC input node; must be decoupled to GND with low-ESR ceramic capacitor near IC
2 (n.c.)	No-connect terminal	Internally unconnected; must remain floating-no external connection permitted
3 (GND)	Ground reference and thermal path	Common return for both regulators; tab connects directly to this pin and serves as primary heatsink interface
4 (Q1)	5 V regulated output	Supplies logic/microcontroller loads; requires ≥1.0 µF ceramic capacitor with ESR ≤5 Ω for stability
5 (Q2)	15 V regulated output	Drives external MOSFET gate drivers; same capacitor requirements as Q1 but higher voltage rating needed

Key Features

Feature	Design Value
Dual independent regulation	Simultaneous 5 V/100 mA and 15 V/30 mA outputs eliminate need for discrete second-stage converters
Wide input voltage support	Operates from 20–40 V continuous input, enabling use in 24 V industrial buses and 36 V truck systems
High-temperature operation	Full functionality maintained from -40 °C to +150 °C junction temperature-suitable for under-hood automotive placement
Integrated protection	Per-output current limiting and shared overtemperature shutdown prevent latch-up or thermal runaway during overload
RoHS-compliant green packaging	PG-TO220-5 meets EU RoHS Directive 2011/65/EU; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE

Applications

Automotive Body Control Module

Industrial PLC I/O Power Supply

Use Scenario: Centralized power management for door modules, lighting controllers, and seat actuators in 24 V vehicle architectures.

IC Role / Device Role / Timing Role: Dual-rail regulator supplying MCU (5 V) and half-bridge gate drivers (15 V) from battery input.

Use Value: Eliminates discrete DC-DC conversion stages, reducing BOM count and improving thermal margin via integrated thermal shutdown.

Use Scenario: Local power conditioning for analog input/output cards in programmable logic controllers operating on 24 V DC field bus.

IC Role / Device Role / Timing Role: Provides isolated 5 V logic rail and 15 V analog front-end bias from noisy industrial supply.

Use Value: Maintains output accuracy despite line transients up to 60 V peak, ensuring ADC reference stability and DAC driver integrity.

Motor Drive Auxiliary Supply

Telecom Remote Terminal Unit

Use Scenario: Compact auxiliary power source for gate driver ICs and isolation logic in 3-phase inverter designs.

IC Role / Device Role / Timing Role: Generates 15 V gate drive voltage and 5 V controller supply from main DC link (20–40 V).

Use Value: Enables fast turn-on of high-voltage MOSFETs while maintaining precise 5 V timing for PWM generation circuits.

Use Scenario: Power subsystem for remote telemetry units deployed in outdoor cabinets with wide ambient temperature swings.

IC Role / Device Role / Timing Role: Regulates 5 V microcontroller core and 15 V RS-485 transceiver bias from 24 V telecom plant battery.

Use Value: Sustains operation across -40 °C to +85 °C ambient with no derating, thanks to 150 °C max junction rating and low quiescent current.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV7675030DRVR	Single-chip dual LDO with 5 V/300 mA and 3.0 V/300 mA outputs; lower max input (18 V); no 15 V option	Not suitable for gate-driver bias; limited to low-voltage logic-only systems	Select only if system requires <18 V input and dual low-voltage rails without 15 V
TPS7H1101AQPWPRQ1	Adjustable single-output LDO (up to 5.5 V); supports external resistor programming; max input 60 V but no native 15 V fixed output	Requires external feedback network to set 15 V; adds component count and layout complexity	Choose only when adjustable output and AEC-Q100 qualification are mandatory and dual fixed outputs are not required

Compared with TLV7675030DRVR and TPS7H1101AQPWPRQ1, IFX21003TNV51AKSA1 uniquely delivers factory-trimmed 5 V and 15 V simultaneously in one TO-220 package with automotive-grade thermal and transient robustness-eliminating design compromises in gate-driver–MCU co-supply applications.

Availability

IFX21003TNV51AKSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, motor drive auxiliary supplies, and telecom remote terminal units requiring stable component supply across extended temperature and input voltage ranges.

Supply support for IFX21003TNV51AKSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.

IFX21003TNV51AKSA1 belongs to Infineon's IFX2100x dual-voltage regulator product line, designed specifically for automotive and industrial systems needing compact, thermally robust, dual-rail linear regulation without external feedback components.

FAQ

What is the maximum allowable input voltage for continuous operation?

The IFX21003TNV51AKSA1 supports continuous input voltages from 20 V to 40 V. While it tolerates up to 60 V for ≤400 ms transients, sustained operation above 40 V risks permanent damage per Absolute Maximum Ratings. This limit ensures safe junction temperature and reliable long-term performance in 24 V and 36 V systems.

Can Pin 2 (n.c.) be grounded or left floating?

Pin 2 is explicitly designated "not connected" in the datasheet and must remain unconnected-neither grounded nor tied to any other net. Internal testing confirms no electrical connection exists; grounding it may cause unpredictable behavior or violate thermal design assumptions due to unintended current paths.

Is the 15 V output capable of driving standard N-channel MOSFET gate drivers?

Yes-the 15 V output delivers up to 30 mA with ±4% accuracy and maintains regulation under load, meeting typical requirements for driving high-side gate drivers like IR2110 or HIP4081. Its 3 V dropout at 30 mA ensures stable operation even when input drops to 20 V, making it suitable for automotive battery brownout conditions.

Does the device require external compensation components for stability?

No external compensation is required. The IFX21003TNV51AKSA1 is internally compensated for stability with ≥1.0 µF ceramic output capacitors (ESR ≤5 Ω) on both Q1 and Q2. Deviating from these values-especially using electrolytic or high-ESR capacitors-may cause oscillation or poor transient response per Section 6 of the datasheet.

IFX21003TNV51AKSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: TO-220-5

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 2

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V, 15V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 10V @ 100mA, 6V @ 30mA

Current - Output:: 100mA, 30mA

Current - Quiescent (Iq):: 1 mA

Current - Supply (Max):: 3.5 mA

PSRR:: 55dB (100Hz), 50dB (100Hz)

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-TO220-5

IFX21003TNV51AKSA1 FAQ

1.How can I place an order for IFX21003TNV51AKSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX21003TNV51AKSA1 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 IFX21003TNV51AKSA1 reliable?

The price and inventory of IFX21003TNV51AKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX21003TNV51AKSA1 is usually 5 days.

3.What payment methods are accepted for IFX21003TNV51AKSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX21003TNV51AKSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX21003TNV51AKSA1?

IFX21003TNV51AKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX21003TNV51AKSA1 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 IFX21003TNV51AKSA1?

For technical support, including IFX21003TNV51AKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX21003TNV51AKSA1 requirements.

6.How does Aetrix verify that IFX21003TNV51AKSA1 is sourced from the original manufacturer or authorized distributors?

All IFX21003TNV51AKSA1 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 IFX21003TNV51AKSA1 meets industry standards.

7.What is the process for return or replacement of IFX21003TNV51AKSA1?

All IFX21003TNV51AKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with IFX21003TNV51AKSA1, 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 IFX21003TNV51AKSA1 part is unused and in its original packaging.

Return procedure for IFX21003TNV51AKSA1:

1.Submit a request within 90 days.

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

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