TLS4125D0EPV50XUMA1 - 2.5A 5V AEC-Q100 Buck Converter | Infineon
MPN: TLS4125D0EPV50XUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.13 | $1,065.00 |
| 1,000 | $1.91 | $1,910.00 |
| 2,500 | $1.71 | $4,275.00 |
TLS4125D0EPV50XUMA1 Overview
A buck converter is a switched-mode DC/DC topology that steps a higher DC input voltage down to a lower regulated DC output by alternately storing energy in an inductor and releasing it to a load through synchronous MOSFETs. The TLS4125D0EPV50XUMA1 belongs to the broader hierarchy of switching regulators -> DC/DC converters -> power management ICs -> semiconductors, and within Infineon's portfolio it sits in the OPTIREG automotive-grade family targeted at ECU point-of-load rails.
Architecturally, the device integrates high-side and low-side MOSFETs, internal compensation, a soft-start circuit, and a precision feedback loop that holds 5V ±2% across line, load, and temperature variations. Spread spectrum and synchronization help meet CISPR 25 / automotive EMI limits without bulky filtering, while the dedicated reset comparator with programmable delay provides a clean microcontroller power-good signal.
Typical applications include automotive body and chassis ECUs, ADAS sensor rails, infotainment head-unit supplies, instrument clusters, lighting modules, and industrial 24V-bus point-of-load regulation. The 40V absolute maximum rating tolerates load-dump transients common in 12V/24V vehicle systems, and the AEC-Q100 qualification supports deployment in safety-relevant automotive environments.
When designing in this part, follow the datasheet's recommended inductor (typically 4.7 µH) and ceramic output capacitor (typically 22 µF X7R) values, keep the SW node copper area minimal to limit EMI, and connect the exposed pad to a thermal copper pour. Enable the spread-spectrum pin in noise-sensitive ADAS or audio rails to relax input-filter design.
Drop-in alternatives for TLS4125D0EPV50XUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLS4125D0EPV50XUMA1 (same form factor and footprint) — differing in Input Voltage Range, Package, Maximum Output Current, Automotive Qualification, Output Voltage Accuracy.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLS4125D0EPV33XUMA1
✅ Drop-In📋 Reference alternative (not in catalog)
TLS4125D0EPV50
✅ Drop-In📋 Reference alternative (not in catalog)
TLE42744EV50XUMA1
✅ Drop-In✓ In Stock
$0.99 / Unit
View Datasheet →TLF42772ELXUMA2
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →TLS4125D0EPV50XUMA1 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck (Step-Down) |
| Input Voltage Range | 3.7 V to 40 V |
| Output Voltage | 5.0 V fixed |
| Output Voltage Accuracy | ±2% (±1.5% in PWM mode) |
| Maximum Output Current | 2.5 A |
| Switching Frequency | 1.6 MHz to 2.8 MHz (high range); 320 kHz to 560 kHz (low range) |
| Nominal Switching Frequency | 2.8 MHz |
| Quiescent Current | 34 µA |
| Light Load Mode | PFM with high efficiency |
| Synchronization Input | Yes |
| Spread Spectrum Modulation | Yes (enable pin) |
| Thermal Shutdown | Yes |
| Reset Function | Flexible reset with undervoltage and overvoltage detection |
| Operating Temperature | -40 °C to +125 °C (automotive) |
| Package | 14-PowerTSSOP (TSDSO-14, 3.90 mm width) with exposed pad |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 (automotive) |
| RoHS Status | Compliant |
TLS4125D0EPV50XUMA1 Pin Configuration
| Pin 1 | VIN — Power input supply; connect to 12V/24V automotive bus with decoupling capacitors |
| Pin 2 | EN — Enable input; logic-high enables the regulator, logic-low disables (low quiescent shutdown) |
| Pin 3 | SSON — Spread spectrum enable input; high enables spread spectrum modulation, has internal pull-down |
| Pin 4 | RT — Timing resistor; sets switching frequency between 1.6 MHz and 2.8 MHz (or 320-560 kHz) |
| Pin 5 | FB — Feedback input; internally connected to fixed 5V reference, do not connect externally |
| Pin 6 | COMP — Compensation network; internal compensation, no external network required |
| Pin 7 | SS — Soft-start programming; external capacitor sets soft-start time |
| Pin 8 | BST — Bootstrap; supplies high-side gate driver, connect to SW via bootstrap capacitor |
| Pin 9 | PGND — Power ground; return path for synchronous MOSFET |
| Pin 10 | SW — Switch node; connect to buck inductor, short with pin 11 at PCB |
| Pin 11 | SW — Switch node; connect to buck inductor, short with pin 10 at PCB |
| Pin 12 | AGND — Analog ground; reference for sensitive analog circuits, connect to PGND at single point |
| Pin 13 | RESET — Reset output; open-drain power-good signal with programmable delay |
| Pin 14 | SYNC — Synchronization input; allows external clock to set switching frequency |
Typical Applications
TLS4125D0EPV50XUMA1 is suitable for 6 applications: Automotive Body and Chassis ECU Power, ADAS Sensor and Camera Module Power, Infotainment Head Unit 5V Rails, Instrument Cluster Power Supply, Automotive LED Lighting Modules, Industrial 24V-Bus Point-of-Load Regulation.
Automotive Body and Chassis ECU Power
The TLS4125D0EPV50XUMA1 is well suited for 12V automotive body and chassis ECUs that require a regulated 5V rail for microcontrollers, CAN transceivers, and relay drivers. Its 3.7V to 40V input range absorbs cold-crank dips down to 6V and load-dump transients up to 40V typical in 12V systems, while the 2.5A output supports multiple downstream loads. The integrated synchronous MOSFETs achieve >90% efficiency at typical VIN=12V, VOUT=5V, IOUT=1A conditions, reducing thermal stress versus a linear regulator. AEC-Q100 qualification and -40°C to +125°C operation allow deployment in underhood and cabin-mounted modules.
Recommended
ADAS Sensor and Camera Module Power
ADAS radar, camera, and lidar sensor modules require low-noise 5V rails to power image sensors, FPGAs, and high-speed serializers. The TLS4125D0EPV50XUMA1's spread-spectrum feature and 2.8 MHz switching frequency, combined with the synchronization input, allow designers to place the switching frequency outside sensitive radar IF bands or to lock to a system clock to eliminate beat-frequency interference. The 14-pin TSDSO PowerTSSOP package provides a small PCB footprint suitable for space-constrained sensor housings, while the 2.5A output supports multiple image-sensor channels plus serializer ICs.
Recommended
Infotainment Head Unit 5V Rails
Automotive infotainment head units require multiple 5V rails for SoCs, USB controllers, audio codecs, and display backlight drivers. The TLS4125D0EPV50XUMA1's 2.5A output can power an entire audio sub-system from a single buck converter, while its PFM light-load mode maintains high efficiency at idle when the audio subsystem is in standby. According to the Infineon datasheet, the integrated reset function with programmable undervoltage detection provides a clean power-good signal for SoC power-sequencing, eliminating the need for an external supervisor IC in many designs.
Recommended
Instrument Cluster Power Supply
Digital instrument clusters combine MCUs, display drivers, and stepper motor gauges that all require a stable 5V rail. The TLS4125D0EPV50XUMA1 delivers 2.5A at ±2% accuracy, sufficient to power the entire cluster from a single point-of-load converter. Its exposed-pad TSDSO-14 package offers ~30°C/W theta_JA on a standard 4-layer JEDEC PCB, allowing full 2.5A output without a heatsink at moderate ambient temperatures. The wide operating range supports cold-start conditions in unheated cabins, and AEC-Q100 qualification is required for safety-relevant cluster applications.
Recommended
Automotive LED Lighting Modules
Exterior and interior LED lighting modules, including headlights, taillights, and ambient lighting, use 5V rails to power LED drivers and microcontroller units. The TLS4125D0EPV50XUMA1's 40V input tolerance handles load-dump on 12V systems and supports 24V truck applications directly. The 2.8 MHz switching frequency enables a compact 4.7 µH inductor, allowing small PCB designs inside lamp housings. According to the OPTIREG datasheet, the integrated spread spectrum reduces EMI in the AM radio band, simplifying CISPR 25 compliance for lighting modules near radio antennas.
Recommended
Industrial 24V-Bus Point-of-Load Regulation
Beyond automotive, the TLS4125D0EPV50XUMA1 suits industrial 24V-bus point-of-load regulation in factory automation, PLC I/O modules, and HMI panels. Its 40V input rating tolerates industrial transients per IEC 61131-2, while the 5V/2.5A output powers microcontrollers, isolated transceivers, and sensor signal-conditioning circuitry. The TSDSO-14 PowerTSSOP package is compatible with standard reflow profiles used in industrial assembly, and the -40°C to +125°C operating range supports outdoor and unheated-cabinet installations. Synchronization allows multiple TLS4125D0EPV50XUMA1 units to lock to a system clock, reducing system-wide EMI.
Recommended
Recommended Products Summary
Engineering reference data for TLS4125D0EPV50XUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLS4125D0EPV33XUMA1 | TLS4125D0EPV50 | TLE42744EV50XUMA1 | TLF42772ELXUMA2 |
|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | 14-PowerTSSOP (TSDSO-14) | 14-PowerTSSOP (TSDSO-14) - same | 14-PowerTSSOP (TSDSO-14) - same | PG-TO252-5 (DPAK-5) - different package | PG-TSDSO-14 - same family |
| Topology | Synchronous Buck (Step-Down) | Synchronous Buck (Step-Down) | Synchronous Buck (Step-Down) | Linear LDO | LDO + Boost Tracker |
| Output Voltage | 5.0 V fixed | 3.3 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed (tracker) |
| Switching Frequency | 1.6 MHz to 2.8 MHz | 1.6 MHz to 2.8 MHz | 1.6 MHz to 2.8 MHz | N/A (linear) | N/A (linear) |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
| Spread Spectrum | Yes | Yes | Yes | N/A | N/A |
Key Differentiators
- Integrated synchronous MOSFETs with 2.5A output (vs TLE42744EV50XUMA1)
- 2.8 MHz switching with spread spectrum for CISPR 25 compliance (vs TLS4125D0EPV33XUMA1)
- AEC-Q100 automotive qualification with integrated reset (vs TLF42772ELXUMA2)
Design Notes
Short pins 10 and 11 (SW node) directly at the PCB to minimize parasitic inductance on the high-di/dt switching path. Place the 4.7 µH buck inductor within 5 mm of the SW pins, and use a 22 µF X7R ceramic output capacitor with <10 mΩ ESR placed close to VOUT. The exposed thermal pad must be soldered to a thermal copper pour of at least 100 mm² on a 4-layer JEDEC board to achieve the datasheet's 30°C/W theta_JA. Per Infineon OPTIREG layout guidelines, keep the feedback trace away from the SW node to avoid noise injection.
Estimated: at VIN=12V, VOUT=5V, IOUT=2.5A, the converter dissipates approximately (12V-5V)*2.5A/0.92 ≈ 19W of loss in the synchronous rectifiers (assuming ~92% efficiency). With theta_JA of 30°C/W on a JEDEC 4-layer board, junction temperature rises ~30°C above ambient at full 2.5A load, leaving ~70°C margin to the 125°C limit at 55°C ambient. For continuous operation above 70°C ambient, derate to 2.0A or add forced airflow. At VIN=24V industrial bus, efficiency drops and dissipation roughly doubles.
Do not load the SW node with long traces or test points - this couples switching noise into the feedback loop and causes output ripple >50 mV. Do not enable spread spectrum in designs where synchronization is required - the SSON pin must be tied low when SYNC is used. Do not exceed 40V on VIN, even transiently - load-dump pulses beyond 40V require an external TVS clamp such as a 36V SMAJ-series diode at the input. The RESET pin is open-drain and requires an external pull-up to VOUT or logic rail.
Compliance Information
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per Infineon product page. Halogen-free per Infineon OPTIREG datasheet environmental statement.
