The TLE4275-Q1 is a low-dropout linear regulator designed to connect to the battery in automotive applications. For the new chip, the device has an input voltage range extending to 40V that drives loads up to 500mA. This range allows the device to withstand transients (such as load dumps) that are anticipated in automotive systems. With only a 28µA quiescent current at IOUT = 1mA (new chip), the device is designed for powering always-on components. Microcontrollers (MCUs) and controller area network (CAN) transceivers in standby systems are examples of such components.
The new chip version of the device has state-of-the-art transient response that allows the output to quickly react to changes in load or line (for example, during cold-crank conditions). Additionally, the new chip version has a novel architecture that minimizes output overshoot when recovering from dropout. During normal operation, the device has a tight DC accuracy of ±2.0% over line, load, and temperature (new chip).
The power-good (reset) delay is adjusted by an external capacitor on the delay pin, allowing the delay time to be configured to fit application-specific systems.
The device also incorporates a number of internal circuits for protection against overload and overtemperature. The legacy chip also provides protection against reverse polarity. The legacy chip requires COUT ≥ 22µF with max supported ESR range of ≤ 5Ω and new chip requires COUT ≥ 2.2µF with max supported ESR range of ≤ 2Ω, within the operating temperature range.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TLE4275-Q1 Automotive, 500mA, 40V, Low-Dropout Regulator With Power-Good datasheet (Rev. J) | PDF | HTML | 23 May 2025 |
| Application note | LDO Noise Demystified (Rev. B) | PDF | HTML | 18 Aug 2020 | |
| Application note | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 09 Aug 2017 | |
| Technical article | Discrete SBCs: versatile and scalable solutions for any application | PDF | HTML | 27 Jul 2017 | |
| More literature | Fundamentals of designing with LDOs in auto battery direct connect applications | 27 Feb 2017 | ||
| Application note | TLE4275 Low Temperature Stability | 18 Jan 2012 |
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The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU, (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
| TO-252 (KVU) | 5 | Ultra Librarian |
| TO-263 (KTT) | 5 | Ultra Librarian |
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