Infineon Technologies TLE42632ESXUMA1

Overview

TLE42632ESXUMA1 from Infineon Technologies is a monolithic 5.0 V low-dropout linear voltage regulator in PG-DSO-8 exposed pad package, designed for automotive power supply and microcontroller supervision. It delivers up to 180 mA output current with ≤±2% output voltage tolerance, supports input voltages up to 45 V, and integrates power-on/undervoltage reset, watchdog monitoring, and inhibit control - used in engine control units (ECUs) and body electronics.

For engineers reviewing the TLE42632ESXUMA1 datasheet, TLE42632ESXUMA1 pinout, TLE42632ESXUMA1 application, or TLE42632ESXUMA1 equivalent, key selection criteria include its adjustable reset threshold (down to 3.5 V), reset delay programmability via external capacitor, watchdog pulse timing control, and ability to maintain reset assertion down to VQ = 1 V under brownout conditions.

Technical Context

The TLE42632ESXUMA1 employs a bandgap-referenced control amplifier driving a series pass transistor with saturation control to limit power dissipation during overload. Its internal protection includes reverse polarity detection, thermal shutdown at ~150°C, and current limiting that caps output at 180 mA typical under fault conditions.

Reset functionality is implemented via a comparator monitoring either the internal reference (4.65 V threshold when RADJ grounded) or an externally scaled output voltage; the RO open-collector output pulls low when threshold violation occurs. Watchdog operation is rising-edge triggered on W pin, with timeout set by capacitor D, and INH enables full shutdown with <1 µA standby current.

Key Specifications

Pinout & Package

Package: PG-DSO-8 exposed pad (RoHS-compliant, thermally enhanced SMD). Exposed pad must be soldered to PCB copper area ≥300 mm² for R_thJA ≤64 K/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO with supervision applications.

Compared with TLV70733PDBVR and MAX6326UT46D3+, TLE42632ESXUMA1 uniquely combines 5 V regulation, adjustable reset, watchdog, inhibit, and AEC-Q100 qualification in one PG-DSO-8 package - eliminating system-level component count and qualification effort.

Availability

TLE42632ESXUMA1 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 with automotive-grade traceability and long-term lifecycle support.

Supply support for TLE42632ESXUMA1 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, and industrial control ICs, with global manufacturing and automotive qualification infrastructure.

TLE42632ESXUMA1 belongs to the OPTIREG™ Linear family, engineered specifically for automotive power supply and microcontroller supervision - balancing ultra-low dropout, integrated safety features, and AEC-Q100 reliability.

FAQ

What is the minimum input voltage required for regulation at full 180 mA load?

The TLE42632ESXUMA1 requires a minimum input voltage of 5.35 V to maintain 5.0 V output at 180 mA load, based on its 0.35 V typical dropout voltage. Below this, output drops linearly; operation is guaranteed down to VI = 5.5 V per functional range specifications, supporting cold-crank scenarios.

How is the watchdog timeout period calculated, and what capacitor value achieves a 100 ms timeout?

The watchdog timeout is determined by the external capacitor connected to pin D and internal circuitry; per Infineon's application note AN2019-07, a 100 nF ceramic capacitor yields ~100 ms timeout at 25°C. Temperature and capacitor tolerance affect accuracy - use X7R/C0G types with ±10% tolerance for production designs.

Can the reset output (RO) drive a microcontroller's dedicated reset pin directly?

Yes - RO is an open-collector output with internal 30 kΩ pull-up to Q (5 V), compatible with standard CMOS reset inputs. For MCUs requiring active-low reset with external pull-up, connect RO directly; for higher noise immunity, add a 10 kΩ external pull-up to 5 V and series RC filter per MCU datasheet recommendations.

Is the exposed pad electrically connected, and how must it be handled in PCB layout?

Yes - the exposed pad is internally connected to GND and must be soldered to a dedicated PCB copper pour tied to system ground. Infineon specifies ≥300 mm² heatsink area for optimal thermal performance (R_thJA ≤64 K/W); use ≥4 thermal vias (0.3 mm diameter) connecting pad to inner ground plane to ensure mechanical reliability and thermal conduction.