Wearable

Able to extend battery life in portable devices by virtue of what is claimed to be the industry’s highest light-load power conversion efficiency at 90%, the ADP5301 buck regulator consumes just 180nA quiescent current.
It is, says Analog Devices, designed to deliver maximum power for a longer period of time than previously achievable and is suited for IoTapplications, including wireless sensor networks and wearable devices such as fitness bands and smartwatches.
It is housed in a tiny WLCSP package that measures less than 3.1mm².
The input voltage is from 6.5 to 2.05V to enable a range of battery sources or architectures. Selectable, low-noise forced PWM mode, with low output voltage ripple powers noise-sensitive analogue load up to 500mA output current.
The ADP5301 and ADP5303 (with VOUT OK and VIN OK flags, respectively) are offered in a nine-ball WLCSP, and the ADP5300 and ADP5302 (VOUT OK and VIN OK flags, respectively) are available in a 10-lead LFCSP.

Three offerings from AEL Crystals reduce the size of the core technology for wearable and IOT devices, says the company.
They are the 1610 watch crystal; the 1210 crystal; and the 1612 oscillator.
The 1610 watch crystal is the world’s smallest 32.768kHz watch crystal, claims the company. It measures 1.6 x 1.0 x 0.5mm (maximum). The wide operating temperature ranges from -40 to +105°C. Initial stabilities can be specified between ±10 and ±50ppm, for wireless modules, in-car devices, Bluetooth devices and mobile phones, as well as wearable devices, such as smart watches, fitness trackers, medical and activity monitoring devices.
ESR (Equivalent Series Resistance) is 60k? (maximum), making the watch crystal suitable for low ESR applications such as Bluetooth Low Energy chipsets. Furthermore, AEC-Q200 compliant versions are available, for use in the automotive industry.
The 1210 crystal is claimed to be the world’s smallest crystal and measures just 1.2 x 1.0 x 0.33mm (maximum). It can be supplied between 36.0 and 80.0MHz. Operating temperature can be specified from -40 to +125°C, with temperature stability from ±10 to ±50ppm and initial stability as low as ±7ppm. AEC-Q200 compliant versions are also available.
According to the company, the world’s smallest oscillator is the 1612. It measures just 1.6 x 1.2 x 0.7mm (maximum) and operates across a temperature range from -40 to +85°C. Temperature stability is ±10 to ±50ppm, and initial stability of ±7 to ±50ppm. Operating frequency range is 1.0 to 80.0MHz and the oscillators operates from a 1.8, 2.5 or 3.3V supply.
http://www.aelcrystals.co.uk