TPS62840 Synchronous Step-Down Converter
Buck converter based on 60nA quiescent current
Miniaturization of battery-powered applications

A switching regulator IC that extends the battery life of IoT devices has been released.

Texas Instruments (TI) announced on the 16th that it is launching an ultra-low power switching regulator IC based on 60nA quiescent current (IQ).

The newly released TPS62840 synchronous step-down converter extends system battery life with 80% light-load efficiency at a 1-mA load. It also enables the use of smaller batteries or fewer batteries, minimizing overall power solution size and reducing costs.

TI's new switching regulators have one-third the quiescent current of competing devices and operate over a wide input voltage (V _in ) range of 1.8 V to 6.5 V, supporting a variety of battery chemistries and configurations.

The TPS62840 is suitable for a variety of battery-powered industrial and personal electronics applications, such as NB-IoT and grid infrastructure equipment, as well as wearables. It not only provides flexibility, wireless range and high accuracy, but also prevents electromagnetic interference (EMI).

The TPS62840 adds to TI's diverse portfolio of highly integrated, low-quiescent-current DC/DC converters, enabling engineers to design smaller systems while maximizing power delivery.

The TPS62840's low quiescent current extends battery life in systems operating at very low loads (less than 100 mA) or in standby/shipping mode. The new device improves efficiency to 80% at 1 mA, approximately 30% higher than competing devices.

The TPS62840 offers user-selectable modes and a stop function to minimize noise and reduce signal distortion. This allows system developers to achieve the same performance without the need for expensive precision signal chain components, sensors, and wireless solutions, thereby reducing solution design costs.

The mode pin is implemented in continuous conduction mode (CCM), also known as forced pulse-width modulation (PWM) mode. This minimizes ripple and noise, reducing the impact on sensitive radio frequency (RF) applications.

In particular, the stop pin can be used to stop all switching, reducing electromagnetic interference and ripple, as well as minimizing distortion transmitted to precision signal chains, measurement, sensor and wireless connectivity devices.

TI's new switching regulators enable developers to design systems that use half the number of batteries or smaller batteries. For example, by using four AAA batteries instead of four AA batteries, you can save 16,980mm ³ of space.

The TPS62840 can support a wide input voltage range of 1.8 V to 6.5 V and a variety of battery chemistries and configurations, including two lithium manganese dioxide (2s-LiMnO2) cells in series, a single cell of lithium thionyl chloride (LiSOCL2), four or two alkaline cells, and lithium polymer (Li-Po).

Pre-production samples of the TPS62840 are currently available from the TI store.

The packages are a 1.5mm x 2.0mm 8-pin SON and a 0.97mm x 1.47mm 6-pin WCSP, with a 3mm x 5mm 8-pin thermally enhanced package (HVSSOP) also planned for later this year.

Pricing starts at $0.85 each in 1,000-unit quantities, with the TPS62840-1DLCEVM55 and TPS62840-1YBGEVM56 evaluation modules priced at $49 each.