TLE4267GMXUMA1 - 5V 400mA LDO Regulator | Infineon | AEC-Q100
MPN: TLE4267GMXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.18 | $118.00 |
| 500 | $0.97 | $485.00 |
| 1,000 | $0.84 | $840.00 |
| 2,500 | $0.72 | $1,800.00 |
TLE4267GMXUMA1 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 headroom approaches the pass element's saturation limit. Unlike switching converters, LDOs dissipate excess input voltage as heat but add no switching noise, making them ideal for noise-sensitive analog and microcontroller rails. Within the broader power management hierarchy, the TLE4267GMXUMA1 belongs to the linear regulator family, itself a sub-category of voltage regulators inside automotive-grade power management ICs.
Key features include an inhibit input (active-HIGH enable), an E2 logic input for ignition-aware turn-on, a reset output with externally programmable delay capacitor, short-circuit protection, overtemperature shutdown, and a wide operating junction temperature range up to 150 C. The PG-DSO-14-30 package provides an exposed thermal pad that lowers junction-to-ambient thermal resistance, enabling sustained 400 mA output at elevated ambient temperatures typical of under-hood automotive environments.
Internally, the TLE4267GMXUMA1 uses a PNP pass transistor architecture with a precision bandgap reference and an integrated reset comparator. The reset delay is set by an external capacitor on the DELAY pin, giving designers flexibility to match microcontroller power-on-reset timing requirements. The device is part of Infineon's OPTIREG linear regulator family.
Typical applications include automotive body electronics, ECU and microcontroller power supplies, sensor bias rails, infotainment systems, and industrial 24 V bus regulators. Designers favor this part where a 5 V rail must survive load-dump transients up to 40 V on the input without a pre-regulator.
When designing with this device, place a 100 nF ceramic input capacitor close to the IC's I pin and a 10 uF minimum output capacitor for regulator stability. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within ratings at maximum dissipation.
This page synthesizes Infineon datasheet specifications, distributor pricing snapshots, drop-in automotive-grade alternatives, and practical design notes not consolidated in any single source.
Drop-in alternatives for TLE4267GMXUMA1 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 TLE4267GMXUMA1 (same form factor and footprint) β differing in Package, RoHS Status, Input Voltage Range, MSL Level, Maximum Output Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE4267GMXUMA2
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TLE4267GMXUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Type | LDO Voltage Regulator (Linear, Fixed Output) |
| Output Voltage (Nominal) | 5.0 V |
| Maximum Output Current | 400 mA (greater than 400 mA per datasheet) |
| Input Voltage Range | 5.5 V to 40 V |
| Reset Threshold (VRT) | 4.5 V (typical) |
| Reset Delay | Programmable via external capacitor |
| Inhibit Input (EN) | Active-HIGH (E2 pin), 4.0 V turn-on threshold |
| Protection Features | Short-circuit proof, overtemperature shutdown |
| Operating Junction Temperature | -40 C to +150 C (AEC-Q100 automotive) |
| Package | PG-DSO-14-30 (14-pin SOIC with exposed thermal pad) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
TLE4267GMXUMA1 Pin Configuration
| Pin 1 | I β Input voltage; block to ground directly at the IC with a ceramic capacitor |
| Pin 2 | E2 β Inhibit input (active-high); device turns on when V(E2) >= 4.0 V; internal pull-down |
| Pin 3 | E6 β Hold/keep-alive logic input; sets whether IC remains active after E2 falls |
| Pin 4 | GND β Ground reference |
| Pin 5 | DELAY β Reset delay capacitor; external capacitor sets reset pulse width |
| Pin 6 | RES β Reset output (open collector); asserted when VQ < VRT (typ. 4.5 V) |
| Pin 7 | Q β Regulated 5 V 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 | NC β Not connected (per datasheet) |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | Tab/PAD β Exposed thermal pad; connect to GND plane for heat dissipation |
Typical Applications
TLE4267GMXUMA1 is suitable for 7 applications: Automotive ECU Microcontroller Power Supply, Body Electronics Module (BCM) Power Rails, Industrial 24V Sensor and PLC Power, Infotainment and Instrument Cluster Power, Battery-Backed Memory and RTC Power, Truck and Heavy Vehicle 24V System Power, Auxiliary Sensor Bias Supply (Automotive/Industrial).
Automotive ECU Microcontroller Power Supply
The TLE4267GMXUMA1 is purpose-built for automotive ECU rails where its 5.5 V to 40 V input range covers cold-crash to load-dump transients on a 12 V battery. Its 400 mA output capability comfortably powers an automotive MCU plus CAN/LIN transceivers, and the integrated reset generator asserts when VQ drops below 4.5 V (VRT), giving the MCU a clean power-on-reset signal during crank dips. The exposed thermal pad in the PG-DSO-14-30 keeps junction temperature in spec at sustained dissipation. Unlike switching regulators, the LDO adds zero switching EMI to sensitive analog housekeeping circuits, simplifying EMI compliance for ISO 11452-2.
Recommended
Body Electronics Module (BCM) Power Rails
Body control modules need a stable 5 V rail that survives double-battery jump-start events on 24 V truck systems. The TLE4267GMXUMA1's 40 V absolute-max input tolerates these surges directly, removing the need for an external pre-regulator. The 400 mA output comfortably drives lighting drivers, mirror controls, and door-module logic. AEC-Q100 qualification and the -40 C to +150 C junction temperature range make it deployable in door-pillar and under-hood BCMs. Infineon's OPTIREG datasheet recommends a 100 nF ceramic at the I pin and a 10 uF minimum at Q for loop stability.
Recommended
Industrial 24V Sensor and PLC Power
The TLE4267GMXUMA1's 5.5 V to 40 V input range maps directly onto 24 V industrial bus systems and factory PLC sensor backplanes. Its 5 V fixed output at 400 mA supplies multiple analog sensor channels (e.g., 4-20 mA loops, RTD signal conditioning) without injecting switching noise. The reset output can feed a watchdog circuit or PLC CPU to detect brownout conditions, replacing a discrete voltage supervisor. AEC-Q100 over-temperature and short-circuit protection suit rugged industrial environments per IEC 61131-2 surge profiles.
Recommended
Infotainment and Instrument Cluster Power
Infotainment head units and instrument clusters need a quiet 5 V rail for audio DACs, TFT display timing controllers, and analog video buffers. The TLE4267GMXUMA1's LDO topology delivers clean DC with no switching ripple, eliminating the EMI headaches a buck converter would introduce near the radio receiver. 400 mA output supports multiple analog subsystems concurrently, while the reset generator holds the cluster MCU in reset until the 5 V rail stabilizes, preventing corrupted boot firmware. The exposed-pad SOIC-14 footprint is easy to hand-rework for prototype clusters.
Recommended
Battery-Backed Memory and RTC Power
When a system must retain SRAM or RTC state across cranking transients, the TLE4267GMXUMA1 can hold a 5 V rail alive through dips that would brown out a bare MCU. The reset generator holds the MCU in reset during deep VQ droops, preventing spurious writes to non-volatile memory. With 5.5 V minimum input and 40 V maximum, the part bridges the gap between cranking (down to ~6 V) and load-dump (up to ~35 V) without operator intervention. For always-on subsystems, its low quiescent current (per datasheet typical specifications) makes it suitable for parking-mode telematic modules.
Recommended
Truck and Heavy Vehicle 24V System Power
Heavy commercial vehicles run on 24 V nominal battery systems with load-dump transients pushing the bus above 40 V. The TLE4267GMXUMA1's 40 V continuous input rating makes it directly applicable to truck ECU rails, ABS modules, and telematic gateways. Its 400 mA output supports telematic modem + GPS subsystems that must operate during engine-off conditions. The AEC-Q100 qualification and exposed thermal pad ensure reliability in commercial vehicle under-chassis installations where ambient temperatures regularly exceed 85 C. The reset output can be wired to wake a CAN-connected telematic MCU on power-up.
Recommended
Auxiliary Sensor Bias Supply (Automotive/Industrial)
Sensor bias rails for pressure, position, and oxygen sensors need a low-noise 5 V reference that does not corrupt the sensor's microvolt-level analog output. The TLE4267GMXUMA1's LDO topology provides this clean reference with PSRR sufficient to reject upstream switching converter ripple from the main ECU supply. The 400 mA capacity supports multiple sensors plus their signal-conditioning op-amps. The inhibit (E2) input allows the MCU to power-cycle sensors for diagnostics, while the reset generator ensures the sensor analog front-end starts in a known state.
Recommended
Recommended Products Summary
Engineering reference data for TLE4267GMXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE4267GMXUMA2 | TLE4267G | TLE4278GXUMA1 | TLE4678ELXUMA2 |
|---|---|---|---|---|---|
| Package | PG-DSO-14-30 (SOIC-14 with thermal pad) | PG-DSO-14-30 (same) | PG-TO263-7 (DPAK) - different footprint | PG-DSO-14-30 (same) | PG-DSO-14-30 (same) |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Output Voltage | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed | 5.0 V fixed |
| Output Current | 400 mA | 400 mA | 400 mA | 400 mA | 400 mA |
| Input Voltage Range | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 45 V | 5.5 V to 45 V |
| Reset Output | Yes (programmable delay) | Yes (programmable delay) | Yes (programmable delay) | Yes + early warning comparator | Yes (programmable delay) |
| Inhibit (EN) Input | Yes (E2, active-high) | Yes (E2) | Yes (E2) | Yes | Yes |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated reset generator with programmable delay (vs TLE4267G (PG-TO263-7 variant))
- 5 V fixed output with ignition-aware inhibit (vs Generic 5V LDO without inhibit)
- AEC-Q100 qualification across full temperature range (vs Industrial-grade LDOs)
Design Notes
Place a 100 nF ceramic input capacitor as close as possible to pin 1 (I) to suppress high-frequency noise from upstream wiring. Use a 10 uF minimum ESR-stable output capacitor at pin 7 (Q); Infineon recommends low-ESR ceramic or tantalum for stability across the full VIN range. The DELAY capacitor value directly sets the reset pulse width per the formula in the datasheet - choose C_delay to match your MCU's POR timing.
Estimated: At VIN = 14 V (worst-case automotive), VOUT = 5 V, IOUT = 400 mA, the TLE4267GMXUMA1 dissipates approximately 3.6 W. The PG-DSO-14-30's theta_JA on a 1 sq-inch copper pour is roughly 50 C/W, implying a junction temperature rise of about 180 C above a 25 C ambient - which exceeds the 150 C maximum. Designers MUST use a larger copper pour (>= 4 sq inches) or downgrade to lower VIN scenarios to keep Tj within ratings. The exposed pad (pin 14) must be soldered to the GND copper pour, not left floating.
Do not confuse the TLE4267GMXUMA1 (PG-DSO-14-30, SOIC-14) with the TLE4267G (PG-TO263-7, DPAK); they share the same silicon but have completely different pinouts. Verify the package code on the device marking before PCB assembly - the GM suffix denotes the SO-14 package. Also note that the inhibit (E2) input has a 4.0 V turn-on threshold; logic-level GPIO signals from a 3.3 V MCU will NOT enable the regulator.
Route the GND pin (pin 4) and the exposed pad (pin 14) to a continuous ground plane with multiple thermal vias to inner copper layers. Keep the DELAY capacitor trace short to prevent noise injection that could retrigger the reset comparator. Place input/output capacitors on the same layer as the IC, with vias directly under the IC pads to minimize parasitic inductance that could compromise loop stability at high dI/dt transients.
Compliance Information
AEC-Q100 qualified per Infineon datasheet. RoHS/REACH compliant. Halogen-free per JEDEC JS709B. Conflict-mineral compliance per Infineon's CMRT filings.
