ETEK Launches High-Performance Low Dropout Linear Regulators for Next-Gen Camera Modules

In the rapidly evolving landscape of 5G, AI and biometric identification, demand for high-definition imaging continues to grow exponentially. From AI-powered thermal scanning and telemedicine to flagship smartphones, imaging clarity and power stability are critical to user experience. To meet these stringent requirements, ETEK has introduced the ET531XX series—high-performance Low Dropout Linear Regulators (LDOs) purpose-built for AVDD camera power supply applications.

For engineering teams seeking a power management solution that combines ultra-high PSRR, ultra-low noise and exceptional transient response, the ET531XX LDOs deliver optimized performance to ensure crystal-clear imaging even in demanding operating conditions.

Why Camera Modules Need Specialized Low Dropout Linear Regulators

Camera module performance is directly determined by power quality. Voltage fluctuations and electrical noise introduce ripple artifacts and graininess that degrade image clarity. ETEK’s low dropout linear regulators act as a critical power conditioning buffer, delivering a stable, clean voltage environment for sensitive image sensors.

Leveraging a precision voltage reference and closed-loop feedback architecture, the ET531XX series maintains ±2% output voltage accuracy across all load, line and temperature variations. This ensures consistent output stability whether the device operates in low-temperature environments or under heavy thermal load.

Key Technical Specifications:

• Input Voltage Range: 1.9V to 5.5V

• Output Voltage Range: 1.2V to 4.5V

• Load Current: Up to 300mA

• Quiescent Current (IQ​): as low as 15μA

• Dropout Voltage: 135mV @ 2.8V/300mA

Ultra-High PSRR Eliminates Image Distortions

Power Supply Rejection Ratio (PSRR) is a critical performance metric for camera power systems. High-frequency noise from other smartphone components often couples into the camera power rail, causing visible image artifacts.

The ET531XX LDOs solve this challenge with industry-leading PSRR performance:

• 81dB at 1kHz

• Above 55dB across 100kHz to 1MHz

This robust noise rejection preserves excellent imaging performance in low-light environments and eliminates ripple artifacts common with lower-grade power regulators. By integrating these LDOs, image sensors are effectively isolated from system-level electrical noise.

Ultra-Low Noise for Pristine Imaging

Beyond suppressing external noise, the regulator itself must minimize self-generated noise. The ET531XX series features an ultra-low noise profile of just 6.5μVrms.

• Measured noise: 9.947μVrms at 10mA load

• Measured noise: 7.610μVrms at full 300mA load

This low-noise power delivery enables high-fidelity color reproduction and sharp edge definition in digital imaging. ETEK’s LDOs provide the clean power required for the high-end image sensors used in leading flagship smartphones.

Exceptional Transient Response for Dynamic Loads

Modern camera features—including rapid autofocus and burst shooting—create sudden, large power load spikes. A slow regulator response causes voltage dips, which can lead to system instability or image artifacts.

The ET531XX low dropout linear regulators deliver excellent line and load transient performance. When the load steps from 1mA to 300mA in 10 microseconds, or when input voltage fluctuates, the device stabilizes output almost instantaneously. This prevents front-end disturbances from impacting sensitive back-end circuitry, ensuring a smooth user experience.

Efficiency and Protection in a Compact Package

Portable devices such as smartphones and PDAs demand ultra-compact components. ETEK offers these low dropout linear regulators in incredibly small DFN4 (1.0 x 1.0) and SOT23-5 packages.

Despite their miniature size, the devices integrate comprehensive safety features to protect end equipment:

• Output Short-Circuit Protection

• Current Limiting

• Thermal Shutdown

• Automatic Discharge Function

The ultra-low dropout voltage and high-efficiency load regulation support operation with a very small input-to-output voltage difference, significantly extending battery life in portable devices.

Proven in Mass Production for Top Global Brands

The ET531XX series has completed full verification by leading global component suppliers and is currently deployed in camera modules for next-generation flagship smartphones from mainstream manufacturers. This mass-production validation confirms the series’ real-world performance and reliability for high-volume consumer electronics.

Ready to Upgrade Your Power Design?

To enhance the stability and imaging clarity of your camera modules, ETEK provides world-class power management solutions supported by expert engineering assistance.

Contact ETEK to request samples or access the complete ET531XX series datasheet.

Email: marketing@etekmicro.com

Request samples: https://www.etekmicro.com/sample/