TLE4267GMXUMA2 - 5V 400mA Automotive LDO Regulator | Infineon
MPN: TLE4267GMXUMA2 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.71 | $2.71 |
| 10 | $2.4 | $24.00 |
| 100 | $1.95 | $195.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.3 | $1,300.00 |
TLE4267GMXUMA2 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. Within the broader power-management hierarchy, LDOs sit beneath switching regulators and form part of the larger family of linear regulators. They are valued for low noise, simplicity, and the absence of switching EMI, at the cost of dissipating VIN-VOUT x IOUT as heat.
Key features of the TLE4267GMXUMA2 include a fixed 5V output with 2% accuracy, an inhibit (enable) input for low-IQ standby control, an integrated reset/watchdog circuit with programmable delay, short-circuit protection, and overtemperature shutdown. The device also provides an early-warning output to signal battery undervoltage before the regulator drops out of regulation, which is critical for ECU power-good sequencing.
The TLE4267GMXUMA2 uses a bipolar pass-element architecture that delivers excellent line and load transient response while consuming only a few hundred microamps of quiescent current in normal operation. This makes it suitable for always-on automotive applications where standby current directly impacts battery drain.
Typical applications include body control modules, instrument clusters, HVAC controllers, infotainment head units, gateway ECUs, and sensor power rails in 12V and 24V automotive systems. The wide 40V input transient tolerance allows it to survive load-dump events without external TVS protection in many designs.
When designing with this part, place the input and output ceramic capacitors as close to the IC as possible to ensure stability, and follow the recommended ESR range from the manufacturer datasheet to avoid loop instability. Series inductance on the input must be minimized to handle automotive transient pulses.
This page synthesizes distributor pricing, AEC-Q100-qualified drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
Drop-in alternatives for TLE4267GMXUMA2 β 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 TLE4267GMXUMA2 (same form factor and footprint) β differing in Package, Input Voltage Range, Protection Features, RoHS Status, MSL Level.
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View Datasheet βTLE4267GMXUMA2 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Series | OPTIREG (Automotive, AEC-Q100) |
| Output Configuration | Positive Fixed |
| Number of Regulators | 1 |
| Output Type | Fixed 5 V |
| Input Voltage (Max) | 40 V |
| Output Voltage (Fixed) | 5 V |
| Output Current (Max) | 400 mA |
| Voltage Dropout (Max) | 0.6 V @ 400 mA |
| PSRR | 54 dB @ 100 Hz |
| Operating Temperature | -40 C to +150 C (junction) |
| Package | PG-DSO-14 (DSO-14, 14-SOIC, 3.90 mm width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified |
| Special Features | Inhibit (enable), Reset output, Early warning, Short-circuit protection, Overtemperature shutdown |
TLE4267GMXUMA2 Pin Configuration
| Pin 1 | I β Input voltage; block to ground directly at the IC with a ceramic capacitor |
| Pin 2 | E2 (Inhibit) β Inhibit input; device is turned on by HIGH signal; internal pull-down |
| Pin 3 | R (Reset) β Reset output; open-collector, LOW when VOUT out of regulation |
| Pin 4 | GND β Ground reference |
| Pin 5 | EW (Early Warning) β Early-warning sense output; signals input undervoltage before dropout |
| Pin 6 | D (Reset Delay) β Reset delay timing capacitor connection |
| Pin 7 | Q (Output) β Regulated 5V output |
| Pin 8 | NC β Not connected (per datasheet) |
| Pin 9 | NC β Not connected (per datasheet) |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin 11 | GND β Ground reference |
| Pin 12 | Q (Output) β Regulated 5V output (parallel to pin 7) |
| Pin 13 | I (Input) β Input voltage (parallel to pin 1) |
| Pin 14 | NC β Not connected (per datasheet) |
Typical Applications
TLE4267GMXUMA2 is suitable for 6 applications: Automotive Body Control Module (BCM) 5V Rail, Instrument Cluster Power Supply, HVAC Control Module 5V Rail, Automotive Gateway ECU Power, Sensor Power for Engine Management, Infotainment Head Unit Auxiliary 5V Rail.
Automotive Body Control Module (BCM) 5V Rail
The TLE4267GMXUMA2's 5V fixed output, 400 mA rating, and AEC-Q100 qualification make it a textbook supply for body control modules. It directly powers microcontrollers (e.g., Infineon AURIX or NXP S32K), CAN transceivers, and relay drivers, all of which require the clean rail the regulator's bipolar architecture delivers. The 40V transient tolerance covers ISO 7637-2 load-dump without external TVS clamps in most designs. With 0.6V dropout at 400 mA, the LDO stays in regulation even during 6V cold-crank dips on a 12V automotive bus. The integrated reset and early-warning outputs let the host MCU monitor rail health without a separate supervisor IC, simplifying BOM cost.
Recommended
Instrument Cluster Power Supply
Instrument clusters demand a stable, low-noise 5V rail to drive stepper motors, LCD backlight drivers, and microcontroller peripherals. The TLE4267GMXUMA2's 54 dB PSRR at 100 Hz rejects upstream alternator ripple, ensuring the cluster's analog signals are not corrupted by switching noise on the battery line. The 400 mA continuous output easily covers the cluster's MCU, CAN bus, and indicator LEDs combined. The inhibit pin lets the BCM shut the cluster down during parking for low quiescent current, while the reset output reliably signals the MCU when the rail is valid - critical for cold-boot sequencing in safety-relevant instrument displays.
Recommended
HVAC Control Module 5V Rail
HVAC control modules combine a microcontroller, sensor inputs (NTC thermistors, pressure sensors), and motor-driver logic, all of which need a clean 5V supply. The TLE4267GMXUMA2's 2% output accuracy ensures the sensor signal chain has a stable reference, while the 400 mA current rating supports the MCU plus multiple loads without headroom concerns. Its wide operating temperature range (-40 C to +150 C junction) handles the cabin and under-dash thermal environment. The early-warning sense output gives the HVAC controller advance notice of a failing rail, allowing graceful shutdown of blower motors before the MCU brown-out resets.
Recommended
Automotive Gateway ECU Power
In-vehicle gateway ECUs that bridge CAN, LIN, and Ethernet networks need a robust 5V rail that survives load-dump and cranking transients. The TLE4267GMXUMA2's 40V input tolerance, 0.6V dropout, and AEC-Q100 qualification satisfy the ISO 7637-2 transient profile directly. At 400 mA, it powers the gateway MCU, multiple CAN transceivers, and Ethernet PHY I/O rails. The reset output's programmable delay (set by external capacitor on pin 6) lets the designer tune power-good timing to the specific MCU's POR requirements. This is a simpler, lower-BOM alternative to a full System Basis Chip when only basic 5V regulation is needed.
Recommended
Sensor Power for Engine Management
Engine management ECUs require multiple isolated, low-noise 5V rails to power MAP, MAF, and oxygen sensors. The TLE4267GMXUMA2 delivers this with 54 dB PSRR at 100 Hz, which attenuates alternator ripple that would otherwise inject noise into sensitive analog sensor measurements. Its 400 mA continuous current supports several sensors simultaneously. The 150 C junction rating permits mounting near the engine bay where ambient temperatures exceed 125 C. The inhibit pin enables the ECU to power-down individual sensor rails during stop-start events for fuel savings, and the reset output flags any rail that falls out of regulation.
Recommended
Infotainment Head Unit Auxiliary 5V Rail
Infotainment head units combine a powerful application processor, audio DACs, USB charging ports, and Bluetooth/WiFi modules, all needing clean 5V. The TLE4267GMXUMA2 is well-suited as an auxiliary 5V rail for always-on functions such as CAN wake-up, RTC backup, and keyless-entry receivers that must remain powered when the main PMIC is off. The regulator's low quiescent current (per the OPTIREG family datasheet) keeps parasitic drain below 100 uA during key-off, preserving the 12V battery over weeks of parking. The reset output interfaces directly with the head-unit MCU's POR input for deterministic boot behavior.
Recommended
Recommended Products Summary
Engineering reference data for TLE4267GMXUMA2 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE4267GMXUMA1 | TLE4278GXUMA2 | TLE42672GATMA2 | TLE4678ELXUMA2 | TLS810B1LDV50XUMA1 | TLE42062GXUMA2 |
|---|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-DSO-14 (3.90 mm) | PG-DSO-14 - same | PG-DSO-14 - same | PG-DSO-14 - same | PG-DSO-14 - same | PG-DSO-14 - same | PG-DSO-14 - same |
| Output Voltage | 5 V (fixed) | 5 V (fixed) | 5 V (fixed) | Adjustable | 5 V (fixed) | 5 V (fixed) | Adjustable tracking |
| Output Current | 400 mA | 400 mA | 800 mA (+100%) | 400 mA | 1000 mA (+150%) | 100 mA (-75%) | 200 mA (-50%) |
| Input Voltage Max | 40 V | 40 V | 40 V | 40 V | 40 V | 40 V | 36 V |
| Dropout Voltage (max) | 0.6 V @ 400 mA | 0.6 V @ 400 mA | 0.7 V @ 800 mA | 0.6 V @ 400 mA | 0.5 V @ 1 A | 0.5 V @ 100 mA | 0.6 V @ 200 mA |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Reset Output | Yes (open-collector) | Yes (open-collector) | Yes | Yes | Yes | Yes | No (tracking regulator) |
| Inhibit / Enable | Yes (active-high) | Yes (active-high) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated reset + early-warning + inhibit in one PG-DSO-14 IC (vs Generic 5V/400mA LDOs (e.g., TL1963A, LM2937))
- Same OPTIREG family, double the output current, same footprint (vs TLE4278GXUMA2)
- Lower quiescent current than most competing 5V/400 mA automotive LDOs (vs Industry-standard 5V automotive LDOs)
Design Notes
Estimated: at VIN=12V, VOUT=5V, IOUT=200 mA (typical BCM load), power dissipation is (12-5)*0.2 = 1.4 W. The PG-DSO-14 package has theta_JA of approximately 70 C/W on a 4-layer JEDEC EIA/JESD51 1sq-in pad, giving a 98 C junction rise above ambient. This is well within the 150 C junction limit. For continuous 400 mA loads, expect ~2.8 W dissipation - still acceptable but recommend copper-pour cooling. Do not exceed 5W dissipation without external heatsinking.
Place input and output ceramic capacitors as close as physically possible to the IC pins, keeping trace inductance below 5 nH. Use X7R 100 nF in parallel with 10 uF on the input to handle automotive transient pulses (ISO 7637-2) and minimize input-voltage ringing. On the output, use a 22 uF X7R with ESR in the 10 mOhm-1 Ohm range to ensure loop stability. Avoid ground-plane cuts under the regulator's thermal pad and connect all four GND pins (pin 4 and pin 11 plus thermal pad) to a single solid ground pour for thermal spreading.
Do not exceed the 40V absolute-maximum input rating, even transiently - load-dump pulses beyond 40V require an external TVS clamp such as a 36V SMAJ. The reset-delay capacitor on pin 6 must be a low-leakage ceramic or film type (C0G/NP0 preferred); standard X7R leakage can shift timing by 20% over temperature. The inhibit pin has an internal pull-down - leave it floating for normal-on operation, or drive it from a 3.3V or 5V logic rail to shut the regulator down. Avoid reverse-voltage on the output pin, as the regulator has no internal reverse-blocking diode.
Estimated: maximum power dissipation P_D_max = (T_J_max - T_A_max) / theta_JA. For a typical underhood application with T_A = 85 C and theta_JA = 70 C/W, P_D_max = (150-85)/70 = 0.93 W. This corresponds to a maximum output current of 0.93 W / (VIN - VOUT) = 0.93 / (12 - 5) = 133 mA. To deliver the full 400 mA at high ambient, either reduce VIN, lower T_A, or use a smaller theta_JA footprint (2+ square inches of copper pour). The PG-DSO-14 thermal pad MUST be soldered to a copper pour for production designs.
Keep high-current output traces (pin 7 and pin 12 to the load) short and wide to minimize voltage drop. Route the reset output (pin 3) and early-warning (pin 5) traces away from switching nodes on the PCB to avoid coupling noise into these sensitive signals. If the reset-delay capacitor (pin 6) must be placed far from the IC, use a guarded trace surrounded by ground. The inhibit pin (pin 2) should be tied directly to VIN through a 10 kOhm resistor if driven by a long cable or external connector, to prevent false inhibit triggers from EMI.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG family datasheet. RoHS compliant and lead-free matte-tin plating. Halogen-free per Infineon product environmental compliance statement.
