TLE4678ELXUMA2 - 5V 200mA LDO w/ Reset | Infineon OPTIREG
MPN: TLE4678ELXUMA2 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.78 | $178.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.15 | $1,150.00 |
Drop-in alternatives for TLE4678ELXUMA2 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet βTLE4678ELXUMA2 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Family | OPTIREG Linear |
| Regulator Type | LDO (Low-Dropout), Positive Fixed |
| Output Voltage | 5 V fixed |
| Maximum Output Current | 200 mA |
| Input Voltage Range | Up to 45 V |
| Reset Output | Yes (integrated reset / watchdog) |
| Output Channels | 1 |
| Package | PG-SSOP-14-EP (exposed pad) |
| Operating Temperature Range | -40 C to +150 C (AEC-Q100 automotive) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per DigiKey listing) |
| Lead-Free | Yes |
TLE4678ELXUMA2 Pin Configuration
| Pin 1 | I β Input voltage |
| Pin 2 | RADJ β Reset threshold adjust |
| Pin 3 | Q β Output voltage (5 V) |
| Pin 4 | WDI β Watchdog input |
| Pin 5 | GND β Ground |
| Pin 6 | RO β Reset output |
| Pin 7 | DEL β Reset delay timing capacitor |
| Pin 8 | NC β Not connected |
| Pin 9 | NC β Not connected |
| Pin 10 | NC β Not connected |
| Pin 11 | NC β Not connected |
| Pin 12 | NC β Not connected |
| Pin 13 | NC β Not connected |
| Pin 14 | GND/TAB β Ground / exposed thermal pad |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TLE4678ELXUMA2 is suitable for 6 applications: Automotive Body Control Module, Dashboard Instrument Cluster Supply, Automotive Sensor Power Rail, Industrial 24V PLC Logic Supply, Body Sensor and Lighting ECU, Power Tool Battery Management Front-End.
Automotive Body Control Module
The TLE4678ELXUMA2 is a strong fit for 12 V/24 V automotive body control modules where its 5 V fixed output powers MCU and CAN transceiver rails. With 200 mA continuous load, 45 V input transient tolerance, and integrated reset/watchdog, the part eliminates the need for a separate supervisor IC. Place the regulator between the battery reverse-polarity protection FET and the MCU, with ceramic input/output capacitors and a copper pour under the exposed pad to keep junction temperature in check during cranking transients.
Recommended
Dashboard Instrument Cluster Supply
Instrument clusters require a clean 5 V rail for display drivers, MCUs, and backlight controllers. The TLE4678ELXUMA2's low-noise LDO output and integrated reset signal ensure the MCU starts cleanly and the watchdog catches firmware lockups. The exposed-pad PG-SSOP-14-EP package keeps the regulator cool even when VIN sits at 13.8 V with full 200 mA load. Tie the reset capacitor to set the power-good delay appropriate for the MCU crystal startup.
Recommended
Automotive Sensor Power Rail
Hall-effect, pressure, and position sensors in engine and chassis applications need a stable 5 V supply with low noise. The TLE4678ELXUMA2's bipolar LDO architecture provides clean power without switching EMI, and its 45 V input range handles 24 V truck systems and load-dump events. The integrated reset output can be repurposed to flag sensor supply brownouts to the ECU. Place the part close to the sensor connector with input capacitance sized per Infineon's minimum requirement.
Recommended
Industrial 24V PLC Logic Supply
Industrial PLC digital input modules running on 24 V bus rails benefit from the TLE4678ELXUMA2's wide VIN range and 5 V fixed output for powering MCU logic, isolators, and status LEDs. The reset signal can directly drive a PLC supervisory circuit or be routed to the backplane. The exposed-pad PG-SSOP-14-EP package supports 200 mA at elevated ambient temperatures typical inside sealed control cabinets. Use a TVS diode on the input to clamp inductive kick from adjacent relay coils.
Recommended
Body Sensor and Lighting ECU
Lighting ECUs controlling LED matrix headlights, tail lamps, and turn indicators require stable 5 V logic supplies alongside high-current LED driver stages. The TLE4678ELXUMA2 fits the logic-rail slot with its 5 V/200 mA rating, watchdog for the MCU, and AEC-Q100 automotive qualification. The exposed-pad package ensures thermal headroom when the regulator is co-located with LED driver MOSFETs on the same PCB. Use the reset output to sequence the LED driver enable lines.
Recommended
Power Tool Battery Management Front-End
Cordless power tools using 18 V/36 V battery packs need a post-regulator to derive 5 V for MCU, display, and Bluetooth radio. The TLE4678ELXUMA2's wide VIN and automotive-grade robustness make it a reliable choice for harsh industrial environments. The integrated watchdog ensures the tool's safety controller remains responsive. Pair with a TVS on the input to absorb motor-braking transients.
Recommended
Recommended Products Summary
Engineering reference data for TLE4678ELXUMA2 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE4678GM | TLE42754EXUMA2 | TLE72782EV50XUMA1 | TLE42744EV50XUMA1 | TLS810B1LDV50XUMA1 |
|---|---|---|---|---|---|---|
| Package | PG-SSOP-14-EP | PG-DSO-14 | PG-SSOP-14-EP | PG-SSOP-14 | PG-SSOP-14-EP | PG-SSOP-14-EP |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed |
| Output Current | 200 mA | 200 mA | 450 mA | 180 mA | 400 mA | 200 mA |
| Input Voltage Max | 45 V | 45 V | 42 V | 45 V | 45 V | 45 V |
| Reset / Watchdog | Yes (integrated) | Yes | No | Yes | No | No |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C | -40 C to +150 C |
Key Differentiators
- Integrated reset and watchdog in same SSOP-14 package (vs TLE42754EXUMA2)
- SSOP-14-EP exposed pad for automotive thermal performance (vs TLE4678GM)
- 45 V input transient tolerance (vs TLE42754EXUMA2)
Design Notes
Estimated: At VIN=13.8 V (typical automotive running voltage), VOUT=5 V, and 200 mA load, power dissipation is (13.8 - 5) * 0.2 = 1.76 W. With the PG-SSOP-14-EP exposed-pad package thermal resistance (per Infineon datasheet thermal data), the junction temperature rise above ambient should be kept below 100 C. Solder the exposed pad to a copper pour of at least 1 square inch to maintain thermal headroom. Higher VIN transients during load-dump will increase dissipation proportionally.
Place input and output ceramic capacitors as close as possible to the IC pins, with short and wide traces to minimize parasitic inductance. The exposed thermal pad must be soldered to the PCB and tied to a copper pour that connects to the ground plane. The reset delay capacitor on pin 7 should use a low-leakage ceramic or film dielectric; an X7R 100 nF is a typical starting value. Keep high-current switching nodes away from the regulator feedback traces.
Do not exceed the absolute maximum input voltage of 45 V, and add a TVS clamp if load-dump transients beyond this rating are expected. The watchdog input must be serviced by the host MCU within the programmed window, or the reset output will assert. Verify that the minimum output capacitance requirement per Infineon's datasheet is met; insufficient capacitance causes output instability. The reset threshold (RADJ) resistor divider must use 1% tolerance parts for accurate brown-out detection.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG Linear family datasheet. RoHS and lead-free per DigiKey product listing. Halogen-free status not explicitly stated in verified data - set to unknown.
