High-Efficiency Power: ETEK Launches New 1µA Ultra-Low Quiescent Current LDO Regulator

In the rapidly evolving landscape of portable electronics and IoT devices, maximizing power efficiency is no longer optional—it is a critical necessity. Procurement managers and hardware engineers are constantly searching for components that can extend battery life without sacrificing performance. To meet these stringent modern demands, ETEK has introduced the ET7H1XX series. This advanced low quiescent current LDO line is engineered to maximize efficiency in your next-generation hardware designs.

Why a Low Quiescent Current LDO Matters for Your Products

When you design portable devices, they often spend most of their operational life in standby or idle modes. Therefore, power consumption during these inactive periods determines the ultimate lifespan of the battery. This is where a specialized low quiescent current( Low IQ) LDO becomes invaluable to your design.

The ETEK ET7H1XX series features an exceptionally low quiescent current of just 1µA. This feature allows your application to minimize baseline power draw significantly. Built on an advanced CMOS process and utilizing an integrated PMOS pass transistor, this low quiescent current LDO delivers an ideal combination of low noise, rapid startup, and dynamic transient enhancement. Integrating this regulator ensures your power rails remain rock-solid, even during the sharp current spikes common in wireless transceivers (RF modules).

Key Performance Specifications and Features

Selecting the right low quiescent current LDO requires a close inspection of technical parameters to match your specific application requirements. The ET7H1XX series offers a robust and highly dependable feature set tailored for high-reliability commercial designs:

• Wide Input Voltage Range: Handles an input range from 2.5V up to 16V, offering excellent compatibility with multi-cell batteries and diverse power rails.

• Flexible Output Voltage Options: The series supports a fixed output voltage range from 1.2V to 5.5V. It is adjustable in precise 50mV step increments to match your digital logic or analog IC needs.

• Optimized Dropout Voltage: Delivers a typical dropout voltage of 600mV when regulating a 5.0V output under a full 300mA load. This ensures maximum voltage utilization from your source supply.

• Integrated Short-Circuit Protection: To safeguard sensitive downstream processors, the device includes an internal safety circuit that clamps maximum current to 120mA during a fault event.

• Robust Output Drive: Capable of delivering a continuous output current of up to 300mA, making it suitable for a wide variety of sensor nodes, microcontrollers, and wireless chips. (Reference Image 1)

Versatile Packaging Options for Space-Constrained Layouts

Modern PCB layouts demand maximum functional density. This requires power components to take up minimal board real estate. ETEK understands this challenge. We provide the ET7H1XX low quiescent current LDO in several industry-standard, ultra-compact packages to fit your structural constraints:

• DFN4 (1×1): The ET7H1XXY variant comes in an ultra-miniature DFN4 package. Pin 1 serves as IN, Pin 2 as GND, Pin 3 as NC (No Connect), and Pin 4 as OUT.

• SOT23-3: The ET7H1XXS configuration offers a standard 3-pin footprint with Pin 1 for GND, Pin 2 for OUT, and Pin 3 for IN.

• SOT89-3: This package is available in two distinct pinouts to match existing industry footprints seamlessly: the ET7H1XXB (Pin 1: GND, Pin 2: IN, Pin 3: OUT) and the ET7H1XXF (Pin 1: OUT, Pin 2: GND, Pin 3: IN).

• SOT23-5: Available in two pinout configurations for enhanced layout flexibility: the ET7H1XXT (Pin 1: IN, Pin 2: GND, Pin 3: NC, Pin 4: NC, Pin 5: OUT) and the standard ET7H1XX layout (Pin 1: GND, Pin 2: IN, Pin 3: OUT, Pin 4: NC, Pin 5: NC).

Advanced Internal Architecture for Supreme Stability

Under the hood, this low quiescent current LDO incorporates a highly sophisticated internal topology. This design guarantees reliable voltage regulation under volatile operating conditions. The internal block diagram of the ET7H1XX series includes an ultra-stable built-in Voltage Reference module linked directly to an error amplifier.

The error amplifier continuously samples the output voltage via an internal resistor divider network. Then, it compares it to the core voltage reference. This feedback loop dynamically controls the gate of the internal PMOS pass element. The loop ensures consistent, ripple-free power delivery to your load. Additionally, an integrated Current Limit Protection block monitors the primary pass transistor in real-time. It instantly clamps the output current if an overcurrent or short-circuit event occurs.

Frequently Asked Questions (FAQ)

1.What is a low quiescent current LDO?

A low quiescent current LDO is a voltage regulator that consumes very little power during standby or light-load operation, helping extend battery life in portable devices.

2.Why is 1µA quiescent current significant for IoT?

Lower quiescent current reduces standby power consumption, making it ideal for battery-powered products such as IoT devices, wearables, and wireless modules.

3.What is the input voltage range of the ET7H1XX?

The ET7H1XX supports an input voltage range of 2.5V to 16V with fixed output voltages from 1.2V to 5.5V.

4.Can the ET7H1XX power wireless communication modules?

The ET7H1XX provides up to 300mA continuous output current for a wide range of portable electronic applications.

5.Which package options are available?

The ET7H1XX is available in DFN4 (1×1), SOT23-3, SOT89-3, and SOT23-5 packages to support different PCB layout requirements.

Secure Your Component Supply with ETEK

As a procurement professional or engineering lead, securing a stable, cost-effective, and high-quality component supply chain is essential. It keeps your production schedules running smoothly. ETEK is dedicated to delivering industry-leading power management solutions. We help you meet international quality standards while optimizing your overall bill of materials (BOM) cost.

Are you ready to elevate the power efficiency and battery life of your next product line? Contact the ETEK sales team today to request engineering samples, obtain a high-volume price quotation, or discuss your custom packaging requirements and cross-reference opportunities with our technical support team. Partner with ETEK and integrate the ultimate low quiescent current LDO into your design today.

Email: marketing@etekmicro.com

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