TLE42712GATMA1 - 5V 550mA LDO Regulator | Infineon | Automotive
MPN: TLE42712GATMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.78 | $3.78 |
| 10 | $3.4 | $34.00 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
TLE42712GATMA1 Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output differential is very small. LDOs are members of the linear regulator family, which in turn belongs to the voltage regulator category and the broader power management IC class of semiconductors. Unlike switching regulators, LDOs dissipate excess input voltage as heat, trading efficiency for ultra-low output noise and fast transient response.
Key features include integrated over-temperature protection, over-current protection, reverse-polarity protection at the input, and an enable/reset function with adjustable delay. The PG-TO263-7-1 package (TO-263 with 7 leads plus tab) provides a low thermal resistance path, allowing sustained 550 mA output even at elevated ambient temperatures. The reset circuitry monitors the output and pulls the reset line low if VOUT drops below 4.65 V, supporting microcontroller supervision.
The TLE42712GATMA1 uses a monolithic bipolar architecture with an integrated pass transistor, reference, and protection circuitry. Its wide input margin and built-in automotive-grade protection features allow direct connection to the 12 V vehicle bus without external preregulators or TVS arrays. The reset comparator provides a clean power-good signal for downstream microcontrollers and CAN transceivers.
Typical applications include automotive body and chassis ECUs, infotainment head units, instrument clusters, and industrial 24 V PLC power rails. The 5 V fixed output and reset functionality make it especially attractive for microcontroller power domains that require a clean supply rail and power-good supervision. The device is also widely used as a post-regulator after a pre-regulated DC-DC converter to achieve low noise.
When designing with this part, account for worst-case power dissipation at high line voltage and full load. At VIN = 16 V, VOUT = 5 V, and 550 mA load, the device dissipates approximately 6 W; the PG-TO263-7-1 tab should be soldered to at least 1 square inch of copper to keep the junction within safe limits. Place input and output ceramic capacitors close to the pins and follow the datasheet sequencing for the reset/adjust pin.
This page synthesizes distributor pricing from DigiKey/Mouser, drop-in compatible same-brand and cross-brand alternatives in the same PG-TO263-7-1 footprint, and design notes that go beyond the Infineon datasheet alone.
Drop-in alternatives for TLE42712GATMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE4271-2G
β Drop-Inπ Reference alternative (not in catalog)
TLE4271G
β Drop-Inπ Reference alternative (not in catalog)
TLE4296G
β Drop-Inπ Reference alternative (not in catalog)
TLE4295G
β Drop-Inπ Reference alternative (not in catalog)
NCV4275ADS50R4G
β Drop-Inπ Reference alternative (not in catalog)
TLE42712GATMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Part Number | TLE42712GATMA1 |
| Product Type | LDO Linear Voltage Regulator (Fixed) |
| Output Voltage | 5.0 V (fixed) |
| Output Voltage Accuracy | Β±2% |
| Maximum Output Current | 550 mA |
| Input Voltage Range (max continuous) | 42 V |
| Input Voltage Transient | 65 V for 400 ms |
| Dropout Voltage | 350 mV (typ) at full load |
| Reset Threshold | 4.65 V (typ) |
| Operating Temperature Range | -40 C to +150 C (junction) |
| Package | PG-TO263-7-1 (TO-263, 7 leads + tab) |
| Mounting Type | Surface Mount |
| Protection Features | Over-temperature, over-current, reverse polarity |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
TLE42712GATMA1 Pin Configuration
| Pin 1 | IN β Input voltage (up to 42 V continuous, 65 V transient) |
| Pin 2 | IN β Input voltage (tied to pin 1 for thermal spreading) |
| Pin 3 | GND β Ground |
| Pin 4 | EN/RESET DELAY β Reset timing / enable capacitor pin |
| Pin 5 | RESET β Reset output (open collector, active low) |
| Pin 6 | OUT β Regulated 5 V output |
| Pin 7 | OUT β Regulated 5 V output (tied to pin 6) |
| Pin TAB | TAB β Exposed pad, internally connected to GND; solder to PCB copper pour |
Typical Applications
TLE42712GATMA1 is suitable for 6 applications: Automotive Body Control Module (BCM) Power Supply, Automotive Instrument Cluster 5 V Rail, Industrial 24 V PLC Logic Supply, Infotainment Head Unit Auxiliary Supply, Sensor Module Post-Regulator, Automotive Lighting ECU Supply.
Automotive Body Control Module (BCM) Power Supply
The TLE42712GATMA1's 42 V continuous / 65 V transient input tolerance and integrated reverse-polarity protection make it a strong fit for body control modules wired directly to the 12 V/24 V vehicle bus. It supplies the BCM microcontroller and CAN transceiver from a clean 5 V rail with 550 mA headroom. The internal reset comparator holds the microcontroller in reset until VOUT exceeds 4.65 V, preventing code execution at unstable rail voltages during cranking. The PG-TO263-7-1 tab bonds to the ECU copper pour, keeping the junction below 150 C even at 14 V input and 400 mA load (estimated ~3.6 W dissipation).
Recommended
Automotive Instrument Cluster 5 V Rail
Instrument clusters require a low-noise 5 V rail to drive analog pointer motors, LCD backlight drivers, and microcontroller I/O. The TLE42712GATMA1's linear regulation (no switching ripple) and Β±2% accuracy keep gauge illumination stable across the entire automotive input range, including load-dump events up to 65 V for 400 ms. Its reset output feeds the cluster MCU so that stepper needles and LCD segments are held off until the rail is stable. Designers pair this LDO with a pre-regulator DC-DC to drop 12 V to ~8 V and reduce dissipation to ~1.65 W at full 550 mA load.
Recommended
Industrial 24 V PLC Logic Supply
Industrial PLCs and sensor I/O modules powered from a 24 V bus benefit from the TLE42712GATMA1's wide 6 V to 42 V input range and 5 V/550 mA output. The regulator sits downstream of the PLC's isolated DC-DC stage, providing the final low-noise rail that powers the logic MCU, optocouplers, and RS-485 transceivers. Its integrated reverse-polarity and over-temperature protection guard against wiring faults and overload conditions common on factory floors. At 24 V input and 300 mA load, dissipation is approximately 5.7 W, so designers size the PG-TO263 copper pour to 1-2 sq inch.
Recommended
Infotainment Head Unit Auxiliary Supply
In automotive infotainment head units, the TLE42712GATMA1 supplies a clean 5 V rail for the audio codec, USB charge controller logic, and standby microcontroller. Its ultra-low noise floor - typical of LDOs - prevents audible interference into the audio DAC reference and AM/FM tuner stages. The wide 6 V-42 V input range covers cold-crank (6 V), nominal 12 V, and 24 V truck systems. With the reset pin tied to the MCU, the host processor boots only after VOUT is stable, eliminating I/O contention during voltage transients.
Recommended
Sensor Module Post-Regulator
Many sensor modules (parking aid, blind-spot radar, cabin air quality) use a switching pre-regulator followed by a linear post-regulator to achieve low-noise analog rails. The TLE42712GATMA1 serves as that post-regulator, dropping a 7-9 V intermediate rail to a clean 5 V for the analog front-end, op-amps, and ADC references. Its 350 mV typical dropout at 550 mA ensures the analog rail holds regulation even as the battery dips during cranking. Reverse-polarity and over-temperature protection are built-in, eliminating discrete TVS arrays in cost-sensitive sensor designs.
Recommended
Automotive Lighting ECU Supply
LED headlamp and tail-light ECUs require a stable 5 V supply for microcontroller logic, LIN transceivers, and diagnostic circuitry. The TLE42712GATMA1 delivers up to 550 mA from the 12 V/24 V bus, surviving 65 V load-dump transients without external clamping. Its reset output ensures the lighting MCU comes up cleanly after ignition cycles, and its PG-TO263-7-1 package handles the warm underhood environment. Designers commonly parallel the TLE42712GATMA1 output with a small ceramic capacitor bank to meet load-step transients for the LIN bus drivers.
Recommended
Recommended Products Summary
Engineering reference data for TLE42712GATMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE4271-2G | TLE4271G | TLE4296G | TLE4295G | NCV4275ADS50R4G |
|---|---|---|---|---|---|---|
| Package | PG-TO263-7-1 (TO-263, 7 leads + tab) | PG-TO263-7-1 - same | PG-TO263-7-1 - same | PG-TO263-7-1 - same | PG-TO263-7-1 - same | DPAK (TO-252, similar TO-263 family footprint) |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | onsemi |
| Output Voltage | 5.0 V (fixed) | 5.0 V (fixed) | 5.0 V (fixed) | 5.0 V / 3.3 V options | 5.0 V (fixed) | 5.0 V (fixed) |
| Maximum Output Current | 550 mA | 550 mA | 550 mA | 450 mA (-18%) | 450 mA (-18%) | 450 mA (-18%) |
| Input Voltage Range | Up to 42 V (65 V transient) | Up to 42 V (65 V transient) | Up to 42 V (65 V transient) | Up to 45 V | Up to 42 V | Up to 45 V |
| Dropout Voltage | 350 mV typ at 550 mA | 350 mV typ | 350 mV typ | 500 mV typ | 500 mV typ | 500 mV typ |
| Reset Output | Yes (4.65 V threshold) | Yes | Yes | No | No | Yes |
| Output Voltage Accuracy | Β±2% | Β±2% | Β±2% | Β±3% | Β±3% | Β±2% |
Key Differentiators
- Functional and electrical identity to TLE4271-2G simplifies inventory and second-source planning (vs TLE4271-2G)
- Integrated reset supervisor with adjustable delay (vs TLE4296G)
- 550 mA output headroom over most cross-brand 450 mA 5 V LDOs (vs NCV4275ADS50R4G)
Design Notes
Estimated: at VIN = 14 V, VOUT = 5 V and IOUT = 550 mA, the device dissipates (14 - 5) * 0.55 = ~4.95 W. With a typical PG-TO263-7-1 theta_JA of ~30 C/W on 1 sq inch of copper, the junction rises ~149 C above 25 C ambient, approaching the 150 C limit. Increase the PCB copper pour to at least 2 sq inches, or place multiple thermal vias under the tab to drop theta_JA below 20 C/W for full-load operation in enclosed enclosures. Above 16 V input, strongly consider a switching pre-regulator.
Solder the PG-TO263-7-1 tab to a continuous ground copper pour using multiple thermal vias to spread heat. Place the 22 uF (or larger) input and output ceramic capacitors within 5 mm of the IN and OUT pins; keep the GND return paths short and direct. Add a 100 nF decoupling capacitor adjacent to any downstream microcontroller VDD pin to absorb switching load steps from digital logic.
Do not exceed the 42 V continuous / 65 V (400 ms) input rating - even with internal protection, sustained over-voltage events can damage the pass transistor. Always populate the reset delay capacitor; an open delay pin can leave the reset output in an undefined state during power-up. Verify the tab-to-ground bond on prototypes with a four-wire Kelvin measurement, since a poorly soldered tab is the most common cause of thermal failure in TO-263 LDOs.
Compliance Information
RoHS and REACH compliance per Infineon product page; AEC-Q100 qualification is implicit in the automotive-pedigree TLE4271 family (qualified to Infineon's automotive grade). Halogen-free status not explicitly stated in the verified data; set to unknown per Data Authenticity Rule.
