Ultra-compact, low-loss power-path solutions for smartwatches, fitness trackers, health monitors, hearables and other battery-powered wearable electronics.
Compact power conversion for always-on wearable electronics
Wearable products operate from small lithium-ion or lithium-polymer cells and must deliver long runtime, low surface temperature and stable power in an extremely limited PCB area. A typical architecture combines a charger and battery interface, a boost-converter switch with a low-forward-voltage Schottky diode, load-switch MOSFETs for rail sequencing and shutdown, and a PMIC or MCU that coordinates operating modes. These building blocks support efficient conversion for displays, sensors, wireless radios, haptics and processors while minimizing leakage current and battery drain in standby and shipping modes.
Key advantages
Ultra-low standby current
High light-load efficiency
Compact PCB footprint
Low battery-path loss
Fast rail startup
Controlled power sequencing
Low forward-voltage rectification
Reduced thermal rise
Battery-runtime optimization
Shipping-mode support
Load isolation and protection
Scalable multi-rail architecture
Wearable power architecture and product mapping
Wearable Device Power Architecture
Battery charging and storage, boost conversion, Schottky rectification, load-switch rail control and PMIC / MCU supervision for compact wearable loads.
Tip: Select a block in the diagram or choose a module from the list. On mobile, swipe horizontally to view the full diagram.
Explore the wearable-device power architecture through the interactive block diagram. Select Boost MOS, Schottky Diode or Load Switch MOS to review its design role, key engineering considerations and placeholder MOT device mapping.
About the solution
Battery-efficient boost conversion and selective rail distribution in a compact footprint
A wearable device typically receives energy through USB-C contacts or a wireless charging coil and stores it in a small rechargeable cell. The boost path raises the battery voltage for rails that require additional headroom, while the Schottky diode provides efficient rectification and reverse-current control. Load-switch MOSFETs isolate subsystems and sequence displays, sensors, radios and haptic loads so the PMIC or MCU can minimize leakage current during standby, sleep and shipping modes.
Scalable across smartwatches, fitness trackers, hearables and medical wearables
The same architecture can be adapted for watches, activity bands, smart rings, wireless earbuds, health patches, personal safety devices and compact diagnostic instruments. Device voltage rating, package size, on-resistance, leakage current and thermal performance can be selected for the battery capacity, peak radio load, display brightness, sensor duty cycle and required operating time of each product.
Low-loss MOSFETs and Schottky diodes for space-constrained battery systems
Small-signal boost MOSFETs, low-leakage load-switch MOSFETs and low-forward-voltage Schottky diodes provide the core discrete-device functions required by wearable power rails. Compact packages, low gate charge, low RDS(on), controlled reverse leakage and suitable pulse-current capability help designers improve runtime, reduce temperature rise and preserve board area for sensing, wireless and user-interface functions.
Battery-efficient boost conversion and selective rail distribution in a compact footprint
A wearable device typically receives energy through USB-C contacts or a wireless charging coil and stores it in a small rechargeable cell. The boost path raises the battery voltage for rails that require additional headroom, while the Schottky diode provides efficient rectification and reverse-current control. Load-switch MOSFETs isolate subsystems and sequence displays, sensors, radios and haptic loads so the PMIC or MCU can minimize leakage current during standby, sleep and shipping modes.
Scalable across smartwatches, fitness trackers, hearables and medical wearables
The same architecture can be adapted for watches, activity bands, smart rings, wireless earbuds, health patches, personal safety devices and compact diagnostic instruments. Device voltage rating, package size, on-resistance, leakage current and thermal performance can be selected for the battery capacity, peak radio load, display brightness, sensor duty cycle and required operating time of each product.
Low-loss MOSFETs and Schottky diodes for space-constrained battery systems
Small-signal boost MOSFETs, low-leakage load-switch MOSFETs and low-forward-voltage Schottky diodes provide the core discrete-device functions required by wearable power rails. Compact packages, low gate charge, low RDS(on), controlled reverse leakage and suitable pulse-current capability help designers improve runtime, reduce temperature rise and preserve board area for sensing, wireless and user-interface functions.
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