At present, wearable devices such as smart watches, smart rings, and TWS earphones are rapidly iterating toward lightweight, ultra-thin, and long-endurance directions, and terminal products are imposing increasingly stringent requirements on the size, power consumption, and performance of power management components. Traditional load switches, constrained by drawbacks such as relatively large package sizes and persistently high quiescent power consumption, are no longer suitable for the R&D and design needs of next-generation portable intelligent devices.
AWINIC, a company deeply engaged in the power management field, has precisely grasped the industry iteration trend and launched the ultra-small, ultra-thin single-channel load switch AW3511x series. With an ultra-small micro-package of 0.618 mm × 0.618 mm and an ultra-thin thickness of 0.37 mm, the product precisely fits niche scenarios such as wearable devices and portable medical equipment, delivering a new generation of low-power, miniaturized, and high-reliability power management solutions for terminal customers.
Core Product Advantages
I. Ultra-Extreme Thin Package, Unlocking New Design Space for Terminals
The core model AWP35116CSR in the AW3511x series adopts a 0.37 mm ultra-thin WLCSP package. Compared with the industry-standard 0.465 mm package specification, the thickness is significantly reduced by 20%, perfectly matching terminal products that are extremely sensitive to device thickness and overall weight, such as smart rings and ultra-thin smart watches, and providing ample freedom for product structural design and appearance innovation.
II. Nano-Ampere Ultra-Low Power Consumption, Effectively Extending Device Endurance
The series products achieve an ultra-low Shutdown current (ISD) as low as 16 nA. In the standby state with peripherals turned off, it can minimize ineffective power dissipation of the device, enabling refined management of overall system power consumption and effectively extending the endurance of wearable devices and portable medical equipment.
III. Comprehensive Protection Mechanisms for Enhanced System Reliability
• QOD (Quick Output Discharge): When the device is turned off, it can quickly discharge residual charge on the output capacitor, ensuring precise and reliable power-off of peripherals. It perfectly fits application scenarios of core components that require extremely high on/off timing accuracy, such as screens and vibration motors, eliminating timing abnormality issues.
• RCP (Reverse Current Protection): It can effectively prevent reverse current injection when the output voltage is higher than the input voltage, protecting the device battery and upstream power supply circuits from damage at the source, thereby improving the service life and operational safety of terminal devices.
AW3511x Ultra-Small, Ultra-Thin Product Series Introduction
Input Voltage Range: 1 V ~ 5.5 V
Output Current: 1.5 A
Switch Rdson:
VIN = 5.5 V, Rdson = 52 mΩ
VIN = 3.3 V, Rdson = 64 mΩ
VIN = 1.8 V, Rdson = 100 mΩ
Ultra-Low IQ: 2 nA
Ultra-Low ISD: 16 nA
Inrush Current Control
Built-in EN Pull-Down Resistor
Quick Output Discharge (QOD)
Reverse Current Protection (RCP): AW35113SCSR
Package: WLCSP 0.618 mm × 0.618 mm-4B
Figure 1 AW3511x Package Information
Figure 2 AW3511x Typical Application Diagram
Figure 3 Product Application Scenario Examples
Product Selection Guide
Table 1 Multi-Channel Load Switch Product Selection Guide
Table 2 Single-Channel Load Switch Product Selection Guide
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