TI Innovative Ultra-Low Power Conversion for Wearable, Sensor, and Industrial Product Design

Industry's smallest, ultra-low power battery charger and the first fully integrated 360nA Iq MicroSiP™ power module that extends battery life

TI Korea (CEO Kent Chon, www.ti.com/ww/kr) September 23, 2014 – TI (CEO Kent Chon) announced the launch of the industry's smallest, lowest-power linear battery charger and an ultra-compact, fully integrated DC/DC power module that provide innovative power management capabilities for ultra-low-power designs. This power module consumes only 360nA of standby current, extending battery life in wearable electronics, remote sensors, and applications based on MSP430™ microcontrollers.

Smallest ultra-low power linear charger

The new bq25100 single-cell lithium-ion charger is available in a 0.9mm x 1.6mm WCSP package and is only half the size of existing charger solutions. This device supports input voltages up to 30V, accurately controls high-speed charging currents from a minimum of 10mA to a maximum of 250mA, and enables precise charge termination down to 1mA, allowing it to support ultra-small lithium-ion coin batteries. In addition, the bq25100 can support a leakage current of less than 75nA, extending standby operation.

By combining the 2.5W, Qi-compatible wireless charging receiver bq51003 and the linear charger bq25100 on a single board, developers can add wireless charging capabilities to small, portable, and wearable applications. Both devices are housed in a new 75mm² TI design reference board. Additionally, TI supports the integration of its bq25100 into wireless charging solutions for wearable and portable healthcare devices under Humavox’s ETERNA™ RF-based wireless charging platform.

MicroSiP power module

TI's new TPS82740A and TPS82740B step-down converter modules support a 200mA output current with 95% conversion efficiency, consume only 360nA in active state and 70nA standby current in standby state. This ultra-small module is available in a 9-bump MicroSiP package that fully integrates a switching regulator, inductor, and input/output capacitors, enabling a solution size of just 6.7 mm².

The TPS82740A supports output voltages from 1.8V to 2.5V and the TPS82740B supports 2.6V to 3.3V in 100mV steps, so they can meet the power requirements of Bluetooth® Low Energy solutions such as TI’s new ultra-low power MSP430FR59xx MCUs and SimpleLink™ CC2540T wireless MCUs.

Key advantages of TPS82740A and TPS82740B

• Smallest 200mA DC/DC Solution: A fully integrated MicroSiP module including all passive components enables development with a solution size of 6.7mm², which is 75% smaller than discrete solutions.

• Lowest Power, Highest Performance: Operates at a no-load current of just 360nA and consumes only 70nA in standby, optimizing power consumption immediately during operation with a built-in load switch and 3-pin voltage selector.

Ultra-low power design

TI’s portfolio of ultra-low power battery management and DC/DC converters has been expanded with the release of the bq25100 charger and the TPS82740A and TPS82740B MicroSiP modules. These products feature low-power designs that extend battery life and enable operation without a battery. The bq25570, bq25505, TPS62740, TPS62737, and TPS62736 power devices consume only the lowest effective standby current in the industry.

Supply timing and price

The bq25100 is available for mass production at a price of $0.75 per unit for 1,000-unit quantities. The user-friendly bq25100EVM-654 evaluation module is available for order from the TI eStore™. The TPS82740A and TPS82740B power modules are also available for mass production. Both modules are provided in 2.3mm x 2.9mm x 1.1mm MicroSiP packages at a price of $1.55 per unit for 1,000-unit quantities. Design simplification and reduced development time are possible through the purchase of the TPS82740AEVM-617 and TPS82740BEVM-617 evaluation modules and the download of PSpice transient module simulation software.