ETEK ET5A8XX High-Performance LDO Regulator: Enabling Clean, 1A Output Power with Ultra-Low Noise Performance

The relentless advancement in RF communication, precision analog instrumentation, and portable electronic devices is driving an unprecedented demand for power rails that are not only stable but exceptionally clean. In this context, procurement and design engineers are tasked with identifying voltage regulators that masterfully balance high efficiency with impeccable signal integrity. In direct response to this critical industry need, ETEK is proud to unveil the ET5A8XX series of low-dropout (LDO) regulators. This innovative family of products is engineered to deliver ultra-low noise and remarkably low quiescent current, thereby empowering next-generation high-performance designs while offering procurement professionals a simplified, reliable component choice.

Engineered for Optimal Efficiency and Design Simplicity

Modern electronic applications demand extended operational life and increasingly compact form factors, placing a premium on power conversion efficiency and thermal management. The ET5A8XX series rises to this challenge through its advanced PMOS-based architecture, capable of providing a robust, continuous output current up to 1A. This substantial current capability allows a single ET5A8XX device to power a broad spectrum of power-intensive subsystems, from sensitive RF front-end modules and data converters to various analog sensors and processors.

Beyond raw performance, the ET5A8XX significantly streamlines the design and procurement process. It achieves stable operation requiring only a minimal 1μF ceramic output capacitor. This design simplicity directly translates into a reduced bill of materials (BOM) count, lowering overall assembly costs and minimizing supply chain complexity associated with sourcing multiple peripheral components.

Technical Excellence for Demanding, High-Reliability Applications

Selecting a power management IC is a decision that fundamentally impacts the stability and reliability of the end product. The ET5A8XX is meticulously designed to address the most prevalent challenges in power system design:

1. Ultra-Low Dropout Voltage and Noise Performance

The regulator features an exceptionally low dropout voltage—typically merely 260mV at a full 1A load. This efficiency minimizes power loss as heat, preserves battery runtime in portable devices, and allows operation from very low input voltages. Critically for noise-sensitive applications, the ET5A8XX boasts an ultra-low output noise floor of 10μVRMS, ensuring the signal purity essential for high-fidelity audio, precision measurement, and wireless communication circuits.

2. Superior Power Supply Rejection Ratio (PSRR)

Power supply interference is a primary adversary of system precision. The ET5A8XX offers an outstanding PSRR of 90dB at 1kHz, effectively isolating the load from low-frequency ripple and noise on the input rail. Even at higher frequencies, such as 1MHz, it maintains a strong 40dB of rejection, safeguarding sensitive circuitry from high-frequency switching noise common in modern systems.

3. Precision Regulation and Comprehensive Protection Suite

Output voltage accuracy is guaranteed within ±1.5% across the entire operating range of line, load, and temperature. To ensure design robustness and end-user safety, ETEK has integrated a full suite of protection features, including over-current protection (OCP), thermal shutdown (TSD), and an auto-discharge function for safe and rapid output discharge when disabled.

Facilitating Compact PCB Design and Streamlined Procurement

Recognizing that board space is a premium resource, the ET5A8XX is offered in industry-standard, space-efficient packages: the SOT23-5 and the DFN6 (2mm x 2mm). These compact footprints are ideal for the dense layouts found in modern consumer electronics, wearable devices, and highly integrated industrial control modules.

For applications with stringent thermal requirements, the DFN6 package incorporates an exposed thermal pad on its underside. This feature enhances heat dissipation from the die to the PCB, ensuring reliable operation under sustained high-load conditions, thereby improving field reliability and reducing return rates.

Verified Performance Under Dynamic Operating Conditions

ETEK is committed to performance that you can depend on, backed by comprehensive characterization data. The ET5A8XX demonstrates excellent transient response, ensuring system stability during real-world operational stresses.

Line Transient Response

Load Transient Response

A key advantage for battery-powered applications is the device’s ultra-low ground current. With a typical quiescent current of just 25μA, it virtually eliminates power drain in standby or sleep modes, directly contributing to longer battery life—a decisive competitive edge in portable and IoT products.

Summary of Key Specifications

Wide Input Voltage Range from 1.9V~5.5V

Output Voltage: 3.0V, 3.3V and etc.

Output Current up to 1A

Very Low IQ of 25µA Typical

Shutdown Current of 0.1µA Typical

Low Dropout Are Typical 260mV at 1A, 3.3V output

Ultra-low Noise Are Typical 10µVrms (lOUT = 200mA) @VOUT = 3V

Very High PSRR Are 90dB at 1kHz, 42dB at 1MHz @VOUT = 3V

Excellent Line/Load Transient Response

Built-in ILIMIT Protection and Thermal Shutdown Circuit

Built-in Auto Discharge Function

Available Packages: DFN6, SOT23-5

Partner with ETEK on Your Next Design

In a competitive landscape where performance and reliability cannot be compromised, the ET5A8XX LDO regulator series presents an optimal synthesis of high current capability, ultra-low noise, robust protection, and design-friendly features. ETEK continues to lead in providing innovative power management solutions that global engineering and procurement teams trust to build superior products.

Ready to enhance the power integrity and efficiency of your next project? Contact the ETEK sales team today to request detailed datasheets, application notes, or evaluation samples of the ET5A8XX series.

Email: marketing@etekmicro.com
Sample Request: https://www.etekmicro.com/sample/