TLE72742DATMA1 - 300mA 5V LDO Regulator, 42V Input | Infineon
MPN: TLE72742DATMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.59 | $2.59 |
| 10 | $2.35 | $23.50 |
| 100 | $2.1 | $210.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.65 | $1,650.00 |
TLE72742DATMA1 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 small, making it ideal as a post-regulator following a pre-converter or for direct use on noisy automotive battery rails. Within the broader power management taxonomy, an LDO belongs to the linear regulator family, which is itself a sub-category of voltage regulators and ultimately part of the power management IC hierarchy used in every automotive ECU.
Key features of the TLE72742DATMA1 include very low quiescent current in standby, integrated output current limiting, thermal shutdown, reverse-polarity protection, and stable operation with small ceramic output capacitors. The wide input voltage range tolerates load-dump transients up to 42 V typical in 12 V automotive systems, while the precision bandgap reference holds Vout within ±2 % across line, load, and temperature variation.
The device is fabricated using Infineon's robust bipolar process technology optimized for automotive environments. The architecture combines a PNP pass element with comprehensive protection circuitry, enabling reliable operation at junction temperatures up to 150 °C while maintaining tight regulation. The PG-TO252-3 (DPAK) package features an exposed tab that serves as the heatsink, achieving a junction-to-ambient thermal resistance suitable for continuous 300 mA delivery.
Typical applications include microcontroller power supplies in body control modules, sensor and actuator power rails, infotainment subsystems, and industrial 24 V bus regulation. Automotive grade qualification makes the part suited for under-hood and cabin-mounted ECUs requiring long-term reliability.
Designers should provide adequate PCB copper area on the tab to keep junction temperature within limits, and place input/output ceramic capacitors close to the pins. The wide VIN range makes the device tolerant of cold-crank and load-dump conditions typical of automotive environments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on standard catalog pages.
Drop-in alternatives for TLE72742DATMA1 — 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 TLE72742DATMA1 (same form factor and footprint) — differing in Maximum Output Current, Package, Input Voltage Range, Operating Temperature Range, Output Voltage Accuracy.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLE7274DNTMA1
✅ Drop-In📋 Reference alternative (not in catalog)
TLE7274-2D
✅ Drop-In📋 Reference alternative (not in catalog)
TLE42662GSV33HTMA2
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.05 / Unit
View Datasheet →TLE42754DATMA1
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →TLE72742DATMA1 Maximum Ratings & Electrical Characteristics
| Regulator Type | LDO (Low-Dropout) Linear, Fixed Output |
| Output Voltage | 5.0 V nominal |
| Output Voltage Accuracy | ±2 % |
| Maximum Output Current | 300 mA |
| Input Voltage Range | 5.5 V to 42 V |
| Quiescent Current (standby) | Low (per datasheet) |
| Output Capacitor | Stable with ceramic capacitor |
| Operating Temperature Range | -40 °C to +150 °C (junction) |
| Thermal Shutdown | Integrated |
| Current Limit | Integrated |
| Reverse Polarity Protection | Yes |
| Package | PG-TO252-3 (DPAK, 2 Leads + Tab), SC-63 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Automotive Grade | Yes (AEC-Q100 qualified) |
TLE72742DATMA1 Pin Configuration
| Pin 1 | IN — Input voltage supply (5.5 V to 42 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | OUT — Regulated 5 V output |
Typical Applications
TLE72742DATMA1 is suitable for 6 applications: Automotive Body Control Module (BCM) 5 V Rail, Instrument Cluster and Dashboard Power, Sensor and Actuator ECU 5 V Supply, Industrial 24 V Bus Regulation, Infotainment and HMI Auxiliary Power, Power Supply for CAN/LIN Transceiver Modules.
Automotive Body Control Module (BCM) 5 V Rail
The TLE72742DATMA1 supplies the 5 V rail for body control modules that drive lighting, wipers, door locks, and mirror actuators. The wide 5.5 V to 42 V input tolerates 12 V battery cold-crank (down to 6 V) and 42 V load-dump transients per ISO 7637-2. With 300 mA continuous current and ±2 % output accuracy, it cleanly powers the host MCU plus several sensor inputs. The integrated reverse-polarity and thermal-shutdown protection makes it ideal for underhood and cabin-mounted ECUs where field reliability is critical.
Recommended
Instrument Cluster and Dashboard Power
Instrument clusters require a low-noise 5 V supply for the display driver MCU, backlight controller, and indicator LEDs. The TLE72742DATMA1's linear architecture produces no switching ripple, eliminating EMI that would couple into the analog gauge drivers or the CAN bus transceiver sharing the same PCB. Its 300 mA budget comfortably supports a small MCU, a CAN transceiver, and several LED backlight strings in parallel. AEC-Q100 qualification ensures long-term reliability in the cabin thermal environment up to 105 °C ambient.
Recommended
Sensor and Actuator ECU 5 V Supply
Sensor ECUs for parking assist, rain/light sensing, and tire-pressure monitoring need a compact, low-quiescent 5 V rail that survives automotive transients. The TLE72742DATMA1 delivers this with reverse-polarity protection and integrated current limiting - critical when sensor harnesses may be miswired during service. Its 42 V load-dump tolerance and -40 °C to +150 °C junction rating cover underhood and wheel-well mounting positions. The PG-TO252-3 DPAK footprint offers a small board area with excellent thermal performance for sealed modules.
Recommended
Industrial 24 V Bus Regulation
Industrial PLCs and remote I/O modules often derive a 5 V logic rail from a 24 V nominal bus that can swing between 18 V and 36 V. The TLE72742DATMA1's 5.5 V to 42 V input range covers this entire window plus transient headroom, making it a clean post-regulator solution. Although the LDO dissipates (VIN - 5 V) × IOUT, at typical 300 mA and 24 V VIN this is roughly 5.7 W - manageable with a modest copper pour on the PG-TO252-3 tab. No inductors are required, simplifying EMI-sensitive analog front ends.
Recommended
Infotainment and HMI Auxiliary Power
Infotainment head units and HMI panels need an auxiliary 5 V rail for standby microcontroller, keypad scanner, and capacitive touch controller. The TLE72742DATMA1 provides this rail directly from the 12 V battery feed with full automotive transient protection. Its low standby quiescent current suits always-on subsystems that must wake the main processor via CAN or LIN. The DPAK package is small enough to fit behind the head-unit PCB while still dissipating the necessary power at 300 mA load.
Recommended
Power Supply for CAN/LIN Transceiver Modules
Standalone CAN and LIN transceiver modules require a stable 5 V supply for the transceiver IC and optional isolator. The TLE72742DATMA1 is well-matched because its 5 V fixed output directly feeds ISO 11898 CAN transceivers, while its wide VIN input handles the 12 V or 24 V vehicle bus. Integrated current limiting and thermal shutdown protect the module if the output is shorted during harness assembly. The AEC-Q100 grade and PG-TO252-3 footprint simplify PCB layout in distributed in-vehicle networks.
Recommended
Recommended Products Summary
Engineering reference data for TLE72742DATMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE7274DNTMA1 | TLE7274-2D | TLE42662GSV33HTMA2 | TLE42754DATMA1 |
|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-TO252-3 (DPAK) | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same | PG-TO252-3 (DPAK) - same |
| Output Voltage | 5.0 V | 5.0 V | 5.0 V | 3.3 V | 5.0 V |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide 42 V input voltage rating tolerates automotive load-dump (vs TLE42662GSV33HTMA2)
- 300 mA continuous output with internal current limit (vs TLE42754DATMA1)
- Reverse-polarity protection integrated on the silicon (vs TLE7274-2D (bare die))
Design Notes
At VIN=12 V, VOUT=5 V, and 300 mA load, power dissipation is roughly (12-5) × 0.3 = 2.1 W. With PG-TO252-3 mounted on approximately 1 square inch of 2 oz copper, the junction-to-ambient thermal resistance (theta_JA) is around 50 °C/W, giving a junction rise of ~105 °C above 25 °C ambient. Estimated: at 85 °C ambient, junction temperature reaches ~190 °C - above the 150 °C rating. Increase copper area to 2-3 sq inch or use a top-side thermal via farm to keep Tj within limits.
Place the input capacitor (≥1 µF ceramic, X7R) directly at the IN pin with a short trace to the GND pin. Place the output capacitor (≥1 µF ceramic, X7R) directly at the OUT pin with the ground return connected to the same GND plane. Keep the tab copper pour continuous and unbroken under the device to maximize heat spreading. Avoid routing high-current or switching traces near the feedback path to prevent injected noise on the 5 V rail.
Do not operate with VIN below 5.5 V - the regulator requires headroom to maintain regulation. Verify that downstream loads do not exceed 300 mA continuous; short-duration peaks beyond 300 mA are tolerated by the current-limit circuit but sustained overload triggers thermal shutdown. Do not exceed 42 V on the input or reverse-polarity events (with VIN negative) without considering the protection network. Finally, do not omit the input/output capacitors - the part is stable with ceramic capacitors but ESR and value are critical for loop stability.
Compliance Information
AEC-Q100 qualified for automotive applications. RoHS and REACH compliance per Infineon product page. Halogen-free status not explicitly stated in provided data.
