TLE4267GATMA1 - 5V 400mA Automotive LDO Regulator | Infineon
MPN: TLE4267GATMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.31 | $3.31 |
| 10 | $2.98 | $29.80 |
| 100 | $2.65 | $265.00 |
| 500 | $2.31 | $1,155.00 |
| 1,000 | $1.97 | $1,970.00 |
TLE4267GATMA1 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 voltage differential is small - typically 100 mV to 500 mV. Within the broader power-management hierarchy, LDOs belong to the linear regulator family, which sits alongside switching regulators (buck/boost) and charge pumps. Unlike switching converters, LDOs dissipate VIN - VOUT as heat, but produce no switching ripple, making them ideal for post-regulation after a switching stage and for noise-sensitive analog rails.
The TLE4267GATMA1 features a typical quiescent current of around 1 mA in normal operation, an inhibit (enable) input for power sequencing, short-circuit protection, and overtemperature shutdown. It is part of the Infineon OPTIREG linear regulator family, designed specifically for automotive ECU power rails where cold-crank transients, load-dump surges, and wide battery voltages are routine. The PG-TO263-7 (D2PAK) package provides a low thermal resistance path through the tab, allowing sustained 400 mA output without a heatsink in well-designed PCBs.
The regulator uses a bipolar pass-transistor architecture with a bandgap reference and error amplifier. The wide input range tolerates the harsh automotive 12 V / 24 V bus including load-dump pulses up to 45 V, while the Enable (Inhibit) pin allows direct microcontroller control for low-power modes. AEC-Q100 qualification makes it suitable for under-hood and body-electronics modules where reliability is mandatory.
Typical applications include automotive ECU power supplies, body-control modules, instrument clusters, and infotainment system rails, as well as industrial 24 V sensor/actuator power conditioning where the 5 V rail must stay clean during large input transients.
When designing with the TLE4267GATMA1, ensure the input ceramic capacitor is placed within 5 mm of the IN pin to handle high dI/dt events and that the tab is soldered to at least 1 cm squared of copper for thermal relief. Avoid reverse-polarity scenarios, and use the Inhibit pin rather than cycling VIN if the host MCU wants to save power.
This page synthesizes distributor pricing (as of 2026-09-15), same-family Infineon drop-in alternatives, and practical PCB/thermal design notes not collected in the manufacturer datasheet alone.
Drop-in alternatives for TLE4267GATMA1 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:
TLE4267G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TLE4267GMNTMA1
β Drop-Inπ Reference alternative (not in catalog)
TLE4275G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TLE4295G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
TLE4294G
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
NCV4275DS50R4G
β Drop-Inπ Reference alternative (not in catalog)
TLE4267GATMA1 Maximum Ratings & Electrical Characteristics
| Output Type | Fixed 5 V |
| Output Voltage | 5 V (typical, Β±2%) |
| Maximum Output Current | 400 mA (min), > 400 mA typ. |
| Input Voltage Range | 5.5 V to 45 V |
| Dropout Voltage | 300 mV at 400 mA |
| Quiescent Current (Iq) | 1 mA typical |
| Output Tolerance | Β±2% |
| Operating Temperature | -40 C to +150 C (junction) |
| Package | PG-TO263-7-1 (D2PAK, 7 leads + tab) |
| Mounting Type | Surface Mount |
| Protection Features | Short-circuit proof, overtemperature shutdown |
| Enable / Inhibit Pin | Yes (active-high Inhibit) |
| Automotive Qualification | AEC-Q100 qualified |
| RoHS Status | Compliant |
TLE4267GATMA1 Pin Configuration
| Pin 1 | IN β Input voltage; block to ground with ceramic capacitor close to IC |
| Pin 2 | INHIBIT β Enable input (active-high); internal pull-down; tie to IN if unused |
| Pin 3 | NC β Not connected (per datasheet) |
| Pin 4 | GND β Ground |
| Pin 5 | NC β Not connected (per datasheet) |
| Pin 6 | NC β Not connected (per datasheet) |
| Pin 7 | OUT β Regulated 5 V output; stabilize with ceramic capacitor |
| Pin 8 | TAB/GND β Exposed tab; connected to GND for thermal dissipation |
Typical Applications
TLE4267GATMA1 is suitable for 6 applications: Automotive ECU Power Supply, Body Control Module (BCM) Rails, Instrument Cluster Power, Industrial 24V Sensor Power, Infotainment System Rails, Battery-Backup Standby Rail.
Automotive ECU Power Supply
The TLE4267GATMA1's 5.5 V to 45 V wide VIN range and AEC-Q100 qualification make it a primary 5 V post-regulator for automotive engine control units. It survives load-dump pulses up to 45 V on 12 V buses and tolerates 24 V truck cold-crank conditions, delivering a clean 5 V rail at 400 mA to microcontrollers, sensors, and CAN transceivers. The exposed tab provides direct PCB thermal relief in the high-temperature under-hood environment, where ambient can reach 105 C.
Recommended
Body Control Module (BCM) Rails
Body control modules require a stable 5 V rail that stays clean during load-dump and jump-start events. The TLE4267GATMA1 supplies 400 mA from the 12 V automotive bus, with the Inhibit pin allowing the BCM microcontroller to power-down unused sub-systems during sleep mode. The PG-TO263-7 tab routes heat directly into the BCM heatsink, supporting continuous 400 mA output without active cooling in door-control and lighting-driver PCBs.
Recommended
Instrument Cluster Power
Analog instrument clusters need clean 5 V for stepper-motor drivers, gauge illumination, and warning-lamp logic. The TLE4267GATMA1's 1 mA quiescent current minimises parasitic drain on the vehicle battery when the cluster is in standby, while its 300 mV dropout keeps the 5 V rail in regulation during cranking. The wide VIN range protects the cluster from transients generated by adjacent wiper-motor and HVAC-fan loads sharing the same harness.
Recommended
Industrial 24V Sensor Power
Industrial PLC and sensor networks run on 24 V rails with significant ripple and switching transients. The TLE4267GATMA1's 45 V absolute-max input lets it sit directly on the 24 V bus, providing a clean 5 V at 400 mA to analog sensor front-ends, ADCs, and isolated communication modules. The Inhibit pin supports safety cut-off, and the D2PAK-7 package suits the conformal-coated, screw-down PCBs typical of factory automation.
Recommended
Infotainment System Rails
Head-unit and telematics modules require a quiet 5 V rail for DSP, audio codecs, and Bluetooth/WiFi transceivers. Used after a primary switching buck, the TLE4267GATMA1 provides a low-ripple post-regulation stage that eliminates switching noise from the audio band. Its AEC-Q100 status simplifies PPAP documentation for the infotainment subsystem, and the 400 mA capacity easily supports the standby + active current of modern head-units.
Recommended
Battery-Backup Standby Rail
In automotive ECU standby, parasitic drain must stay below 100 uA per rail to preserve battery life over months of parking. The TLE4267GATMA1's Inhibit pin can be pulled low by the ECU MCU during sleep, dropping quiescent to a few uA; wake-up is sub-millisecond via the same pin. Combined with a small output capacitor, this provides an instant-on 5 V rail for wake-up logic without resetting the ECU each ignition cycle.
Recommended
Recommended Products Summary
Engineering reference data for TLE4267GATMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE4267G | TLE4267GMNTMA1 | TLE4275G | TLE4295G | TLE4294G | NCV4275DS50R4G |
|---|---|---|---|---|---|---|---|
| Package | PG-TO263-7 (D2PAK) | PG-TO263-7 (D2PAK) - same | PG-TO263-7 (D2PAK) - same | PG-TO263-7 (D2PAK) - same | PG-TO263-7 (D2PAK) - same | PG-TO263-7 (D2PAK) - same | PG-TO263-7 (D2PAK) - same |
| Brand | Infineon | Infineon (same brand) | Infineon (same brand) | Infineon (same brand) | Infineon (same brand) | Infineon (same brand) | onsemi (cross-brand) |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed |
| Output Current (min) | 400 mA | 400 mA | 400 mA | 450 mA | 450 mA | 500 mA | 450 mA |
| Input Voltage (max) | 45 V | 45 V | 45 V | 45 V | 45 V | 45 V | 42 V |
| Dropout (at full load) | 300 mV @ 400 mA | 300 mV @ 400 mA | 300 mV @ 400 mA | 500 mV @ 450 mA | 500 mV @ 450 mA | 500 mV @ 500 mA | 500 mV @ 450 mA |
| Inhibit/Enable Pin | Yes (Pin 2) | No (always-on) | Yes | Yes | Yes | Yes | Yes |
| Watchdog / Reset | No | No | No | Yes (RESET output) | No | Yes (RESET output) | Yes (RESET output) |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Higher peak input voltage (45 V vs 42 V) (vs NCV4275DS50R4G)
- Lower quiescent current (1 mA vs ~2 mA) (vs TLE4295G)
- No RESET/Watchdog complexity (vs TLE4275G)
- Lower current rating (400 mA vs 500 mA) (vs TLE4294G)
Design Notes
At VIN = 14 V (typical 12 V automotive bus loaded) and VOUT = 5 V at 400 mA, the TLE4267GATMA1 dissipates approximately 3.6 W continuously. The PG-TO263-7 tab has a junction-to-ambient thermal resistance of around 35-40 C/W on a 1 oz copper 4-layer PCB with 1 cm squared of tab copper. Estimated: junction-to-ambient rise is approximately 144 C above ambient - therefore either keep VIN-VOUT differential below ~6 V at full load, or expand the tab copper to 2 cm squared to drop theta_JA toward 25 C/W. For continuous 400 mA at VIN above 12 V, a small clip-on heatsink on the D2PAK is recommended.
Place a 1 uF to 10 uF X7R ceramic input capacitor within 5 mm of the IN pin (Pin 1). Place a 10 uF to 22 uF low-ESR ceramic output capacitor close to OUT (Pin 7). The exposed tab (Pin 8) MUST be soldered to a copper pour that is connected to GND (Pin 4) through multiple thermal vias (at least 9 vias of 0.3 mm diameter). Do not route noisy digital traces or switching-node copper directly under the tab to avoid ground-bounce coupling into the regulated 5 V rail.
Do not leave the INHIBIT pin (Pin 2) floating. Although it has an internal pull-down, floating behaviour is undefined under noisy automotive EMI. Tie INHIBIT to IN through a 10 kohm resistor or directly drive it from the MCU GPIO. Reverse-battery protection is NOT internal - add a Schottky diode or P-MOSFET in the VIN path if the application can see reverse polarity. Finally, never place the regulator input far from the bulk capacitor; long VIN traces create parasitic inductance that combines with the input capacitor to ring above the 45 V absolute-max during load-dump events.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG datasheet. RoHS and REACH compliant per product page. Halogen-free per Infineon package materials declaration. Conflict-minerals statement available from Infineon supplier portal.
