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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Infineon Technologies AUIR3242STRXUMA1

Name: AUIR3242STRXUMA1
Brand: Infineon Technologies
SKU: AUIR3242STRXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUIR3242STRXUMA1

Manufacturer:: Infineon Technologies

Category:: Gate Drivers

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

Datasheet:: AUIR3242STRXUMA1.pdf

Description:: IC GATE DRVR HIGH-SIDE DSO8-907

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AUIR3242STRXUMA1 from Infineon Technologies is a high-side MOSFET driver IC for back-to-back N-channel MOSFET configurations, featuring integrated boost DC/DC converter (V_OUT up to 12.5 V), under-voltage lockout with diagnostic output, and ultra-low quiescent current (≤1.5 µA off-state, ≤8 µA on-state) across 3–36 V supply range. It enables battery-switch and stop-start system net stabilization in automotive power distribution.

For engineers reviewing the AUIR3242STRXUMA1 datasheet, AUIR3242STRXUMA1 pinout, AUIR3242STRXUMA1 application, or AUIR3242STRXUMA1 equivalent, key selection criteria include its active-low IN control, integrated analog/digital diagnostics (RS current sense, UVLO flag), SOIC-8 package compatibility, and ability to drive standard-level MOSFETs down to 3 V battery voltage.

Technical Context

The AUIR3242STRXUMA1 integrates a self-oscillating boost converter (external 100 µH inductor, internal diode) that generates a regulated gate drive voltage ≥12.5 V independent of input supply, enabling full enhancement of N-channel MOSFETs even at 3 V V_CC. Its input stage is active-low with TTL-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.5 V).

It implements dual protection: under-voltage lockout (UVLO) with diagnostic latch output (pin 8) and ground-loss detection via RS pin current monitoring (±1% accuracy). The gate driver delivers peak source/sink current >250 mA with controlled slew rate to minimize EMI during switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	3 V to 36 V - supports wide automotive battery voltage swing including cold-crank (3 V) and load-dump (36 V)
I_Q (Off-State)	≤1.5 µA - enables always-on battery disconnect without parasitic drain in vehicle sleep mode
I_Q (On-State)	≤8 µA - maintains low power consumption during active battery switch operation
V_OUT (Boost)	≥12.5 V - ensures full turn-on of standard-threshold N-MOSFETs (V_GS(th) ≤ 4 V) at low V_CC
UVLO Threshold	≈6 V with hysteresis - prevents MOSFET linear-mode conduction and thermal runaway during brownout
RS Sense Accuracy	±1% - enables precise overcurrent detection for battery protection with external shunt
Gate Drive Current	>250 mA peak - provides fast MOSFET turn-on/turn-off (t_ON/t_OFF < 1 µs) minimizing conduction losses

Pinout & Package

Package: SOIC-8 (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant, lead-free, halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Active-low enable input	Drives gate high when pulled low (0–0.8 V); pulls gate to source when high (2.5–5.5 V)
2 (GND)	Power and signal reference	Common return for V_CC, RS, and gate driver; must be low-impedance for accurate current sensing
3 (RS)	Analog current sense input	Measures MOSFET source current via external shunt; enables ±1% overcurrent detection and diagnostic reporting
4 (SW)	Boost converter switch node	Connects to external 100 µH inductor and internal power switch; rated for 65 V max repetitive voltage
5 (SOURCE)	MOSFET source connection	Direct tie to back-to-back MOSFET source terminals; referenced for gate drive and current sensing
6 (GATE)	High-current gate driver output	Sinks/sources >250 mA to drive N-MOSFET gate; includes slew-rate control for EMI reduction
7 (V_CC)	Main supply input	Accepts 3–36 V; powers logic, UVLO, and boost controller; internal LDO regulates internal bias rails
8 (OUT)	Boost output / UVLO diagnostic	Provides ≥12.5 V gate drive; asserts low during UVLO condition for system-level fault signaling

Key Features

Feature	Design Value
Integrated boost converter with internal diode	Eliminates need for external Schottky diode and reduces BOM count in battery-switch designs
Active-low TTL-compatible input	Direct interface with microcontroller GPIO without level-shifting; simplifies control logic
Analog + digital diagnostics (RS + OUT)	Enables both real-time current monitoring and latched fault reporting for ASIL-B compliant systems
Ground-loss protection	Detects open GND connection via RS pin behavior and disables gate drive to prevent unsafe operation
Ultra-low I_Q in both states	Supports ISO 8820-10 and UNECE R100 compliance for vehicle sleep-mode current budgets (<100 µA total)

Applications

Automotive Stop-Start Battery Switch

12 V/24 V Dual-Battery Isolation

Use Scenario: Controls back-to-back N-MOSFETs to isolate starter battery from accessory loads during engine cranking.

IC Role / Device Role / Timing Role: High-side gate driver with integrated boost and UVLO; enables reliable MOSFET turn-on at 6 V cranking voltage.

Use Value: Prevents voltage sag-induced MOSFET linear operation and thermal failure during cold-start conditions.

Use Scenario: Enables automatic isolation between main and auxiliary batteries in commercial vehicles with dual-battery architectures.

IC Role / Device Role / Timing Role: Bidirectional power path controller with current-sense diagnostics; monitors charge/discharge direction via RS pin polarity.

Use Value: Supports ASIL-B functional safety requirements through analog current measurement and fault-latched OUT signal.

Engine Control Unit (ECU) Power Distribution

ADAS Domain Controller Power Management

Use Scenario: Provides controlled power-up/down sequencing for ECU sub-systems using MOSFET-based hot-swap switches.

IC Role / Device Role / Timing Role: Gate driver with programmable UVLO threshold and fast gate turn-off (t_OFF < 1 µs) for transient suppression.

Use Value: Ensures clean power rail ramp-up and prevents inrush-induced reset during ECU wake-up from deep sleep.

Use Scenario: Manages power delivery to radar, camera, and sensor fusion modules requiring low-quiescent-power always-on capability.

IC Role / Device Role / Timing Role: Low-I_Q battery switch driver with diagnostic reporting for OTA-updatable power policy enforcement.

Use Value: Maintains sub-10 µA system standby current while enabling remote fault detection and safe power cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side back-to-back MOSFET driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS4H160-Q1	Higher V_CC max (60 V), integrated current limiting (no external RS), no boost converter - requires external gate drive supply	Targeted at 48 V mild-hybrid systems; lacks integrated boost for low-V_CC operation	Select when system uses dedicated 12 V gate supply and requires higher voltage rating
LM74700-Q1	No integrated gate driver; only ideal diode controller with reverse-current blocking - requires external driver stage	Used for OR-ing and reverse-polarity protection, not back-to-back switching	Select only for unidirectional load-switching where gate drive is provided externally

Compared with TPS4H160-Q1 and LM74700-Q1, the AUIR3242STRXUMA1 uniquely combines integrated boost conversion, ultra-low I_Q, and back-to-back MOSFET control in one SOIC-8 package-making it optimal for cost-sensitive, space-constrained 12 V automotive battery switches requiring operation down to 3 V.

Availability

AUIR3242STRXUMA1 is available at Aetrix Electronics and suitable for automotive stop-start systems, battery management units, and ECU power distribution networks requiring stable component supply, AEC-Q100 Grade 1 qualification, and long-term lifecycle support.

Supply support for AUIR3242STRXUMA1 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 electronics, and industrial control ICs, with global manufacturing and automotive qualification expertise.

The AUIR3242STRXUMA1 belongs to Infineon's automotive-grade high-side driver product line, designed specifically for intelligent battery switching in 12 V/24 V vehicle electrical architectures with stringent low-power and functional safety requirements.

FAQ

What is the minimum V_CC required for reliable gate drive output?

The AUIR3242STRXUMA1 operates down to 3 V V_CC and still delivers ≥12.5 V at the OUT pin via its integrated boost converter. This ensures full gate enhancement of standard N-channel MOSFETs (V_GS(th) ≤ 4 V) even during cold-cranking events. Below 3 V, UVLO activates and disables gate drive.

How does the RS pin enable current sensing and fault detection?

The RS pin accepts voltage from an external shunt resistor placed between SOURCE and system ground. The internal amplifier measures this voltage with ±1% accuracy, enabling real-time current monitoring and overcurrent shutdown. Polarity detection on RS also supports ground-loss protection by identifying open-GND faults.

Is an external inductor required, and what value is specified?

Yes, an external 100 µH inductor is mandatory and connected between SW (pin 4) and V_OUT (pin 8). This inductor forms the energy storage element of the integrated boost converter. Infineon specifies 100 µH ±20%, 200 mA saturation current, and shielded construction to minimize EMI coupling.

Does the AUIR3242STRXUMA1 support bidirectional current flow in back-to-back configuration?

Yes - the back-to-back N-MOSFET topology driven by this IC inherently supports bidirectional current flow when both MOSFETs are enhanced. The RS pin senses magnitude and polarity of current, allowing system firmware to distinguish charge vs. discharge direction in dual-battery applications.

AUIR3242STRXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: High-Side

Channel Type:: Single

Number of Drivers:: 1

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 3V ~ 36V

Logic Voltage - VIL, VIH:: 0.8V, 2.5V

Current - Peak Output (Source, Sink):: 350mA, 350mA

Input Type:: Non-Inverting

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 6µs, 6µs

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8-907

AUIR3242STRXUMA1 FAQ

1.How can I place an order for AUIR3242STRXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AUIR3242STRXUMA1 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 AUIR3242STRXUMA1 reliable?

The price and inventory of AUIR3242STRXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUIR3242STRXUMA1 is usually 5 days.

3.What payment methods are accepted for AUIR3242STRXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUIR3242STRXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUIR3242STRXUMA1?

AUIR3242STRXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUIR3242STRXUMA1 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 AUIR3242STRXUMA1?

For technical support, including AUIR3242STRXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUIR3242STRXUMA1 requirements.

6.How does Aetrix verify that AUIR3242STRXUMA1 is sourced from the original manufacturer or authorized distributors?

All AUIR3242STRXUMA1 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 AUIR3242STRXUMA1 meets industry standards.

7.What is the process for return or replacement of AUIR3242STRXUMA1?

All AUIR3242STRXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with AUIR3242STRXUMA1, 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 AUIR3242STRXUMA1 part is unused and in its original packaging.

Return procedure for AUIR3242STRXUMA1:

1.Submit a request within 90 days.

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

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