TLE4678ELXUMA2 - 5V 200mA LDO w/ Reset | Infineon OPTIREG
MPN： TLE4678ELXUMA2 ✓ 啟用中TLE4678ELXUMA2 概覽
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally above the output. LDO regulators sit in the broader hierarchy of voltage regulators under DC-DC and linear regulators, themselves a sub-class of power management ICs. They are valued for their low noise, simplicity, and absence of switching EMI, making them the preferred post-regulator for noise-sensitive analog, sensor, and microcontroller supply rails.
Key specifications include the 5 V fixed output, 200 mA continuous load, 45 V maximum input, low quiescent current consumption in normal operation, and an integrated reset generator with adjustable threshold. The exposed-pad PG-SSOP-14-EP package keeps thermal resistance low so the regulator can sustain 200 mA at high VIN without entering thermal shutdown, while the SSOP body footprint remains compatible with hand and reflow soldering.
The TLE4678ELXUMA2 uses a monolithic bipolar process integrating pass element, reference, reset comparator, and protection logic. The reset output asserts low when VOUT falls below the programmed threshold, providing a clean MCU brown-out signal. The watchdog can be serviced by the host controller to verify firmware health, an important safety feature for automotive ECUs.
Typical applications include automotive body and chassis ECUs, sensor supplies, dashboard controllers, and industrial microcontroller rails requiring 5 V regulation from 12 V or 24 V bus. The reset/watchdog integration reduces BOM count versus a separate LDO plus supervisor.
When designing with this part, place input and output ceramic capacitors close to the IC pins, observe the minimum output capacitance requirement specified by Infineon, and tie the exposed pad to a copper pour for heat extraction. The reset delay capacitor value sets the assertion pulse width and must be chosen per application timing.
This page synthesizes distributor pricing, drop-in alternatives, and design notes specific to the TLE4678ELXUMA2 footprint, providing practical information not consolidated on the manufacturer datasheet.
直接替換替代品，適用於 TLE4678ELXUMA2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TLE4678ELXUMA2 （相同外形與佔位） — 差異在於 Package, Input Voltage Range, Maximum Output Current, Operating Temperature Range, RoHS Status.
TLE42754EXUMA2
✅ 直接替換📋 參考替代品（不在目錄中）
TLE72782EV50XUMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLE42744EV50XUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLS810B1LDV50XUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLE4678ELXUMA2 最大額定值與電氣特性
| Manufacturer | Infineon Technologies |
| Product Family | OPTIREG Linear |
| Regulator Type | LDO (Low-Dropout), Positive Fixed |
| 輸出電壓 | 5 V fixed |
| 最大輸出電流 | 200 mA |
| 輸入電壓範圍 | Up to 45 V |
| Reset Output | Yes (integrated reset / watchdog) |
| Output Channels | 1 |
| 封裝 | PG-SSOP-14-EP (exposed pad) |
| 工作溫度範圍 | -40 C to +150 C (AEC-Q100 automotive) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant (per DigiKey listing) |
| Lead-Free | Yes |
TLE4678ELXUMA2 腳位配置
| 腳位 1 | I — Input voltage |
| 腳位 2 | RADJ — Reset threshold adjust |
| 腳位 3 | Q — Output voltage (5 V) |
| 腳位 4 | WDI — Watchdog input |
| 腳位 5 | GND — Ground |
| 腳位 6 | RO — Reset output |
| 腳位 7 | DEL — Reset delay timing capacitor |
| 腳位 8 | NC — Not connected |
| 腳位 9 | NC — Not connected |
| 腳位 10 | NC — Not connected |
| 腳位 11 | NC — Not connected |
| 腳位 12 | NC — Not connected |
| 腳位 13 | NC — Not connected |
| 腳位 14 | GND/TAB — Ground / exposed thermal pad |
典型應用
TLE4678ELXUMA2 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 TLE4678ELXUMA2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Integrated reset and watchdog in same SSOP-14 package (對比TLE42754EXUMA2)
- SSOP-14-EP exposed pad for automotive thermal performance (對比TLE4678GM)
- 45 V input transient tolerance (對比TLE42754EXUMA2)
設計說明
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.
合規資訊
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.
