The LTC3704 is a wide input range, current mode,positive-to-negative DC/DC controller that drives an N-channel power MOSFET and requires very few external components. Intended for low to high power applications,it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maxi-mizing efficiency.The IC’s operating frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchro-nized to an external clock using the MODE/SYNC pin.Burst Mode operation at light loads, a low minimum operating supply voltage of 2.5V and a low shutdown quiescent current of 10 µA make the LTC3704 ideally suited for battery-operated systems.For applications requiring constant frequency operation,the Burst Mode operation feature can be defeated using the MODE/SYNC pin. Higher than 36V switch voltage applications are possible with the LTC3704 by connecting the SENSE pin to a resistor in the source of the power MOSFET.

Application areas
SLIC Power Supplies Telecom Power Supplies Portable Electronic Equipment Cable and DSL Modems Router Supplies

Bluetooth® LE 5.2 Wireless Network Coprocessor
BlueNRG-2N is an ultra-low power (ULP) network coprocessor solution for Bluetooth® Low Energy applications.

It embeds ST’s most advanced RF radio IP, combining unparalleled performance with extremely long battery life.

It is fully compliant with Bluetooth Core Specification version 5.2 and supports enhanced features such as state-of-the-art security, privacy and extended packet length for faster data transfer up to 700 kbps at the application level.

The BlueNRG-2N is Bluetooth® 5.2 certified, ensuring interoperability with the latest generation smartphones and other host devices.

The Bluetooth Low Energy stack runs on the embedded ARM Cortex-M0 core. The STMicroElectronics BLE stack is stored in on-chip non-volatile flash memory and can be easily upgraded via SPI/UART and dedicated STMicroElectronics software tools.

• All features
  • Low power radio performance
    • Sleep current consumption reduced to 900 nA
    • TX current consumption 8 mA (@ -2 dBm, 3.0 V)
    • RX current consumption 2 mA (@ sensitivity level, 3.0 V)
    • Programmable output power level up to +8 dBm (@antenna connector)
    • Excellent RF link budget (up to 96 dB)
    • Integrated DC-DC buck converter and LDO regulator
  • Bluetooth® 5.2 certified
    • Ensure multi-master and multi-slave communication
    • 2 masters connected to 6 slaves at the same time
    • Can handle up to 8 connections simultaneously
    • LE data length extension (application level up to 700 kbps)
    • Wireless firmware updates are 5x faster
    • LE Privacy 2
    • Reduces the ability to be tracked over time by changing addresses frequently, without host involvement and saving battery life
    • LE secure connection
    • The Elliptic Curve Diffie-Hellman (ECDH) key agreement protocol is used to establish a pairing mechanism to implement a secure key exchange mechanism that prevents eavesdropping.

The KTE7000 is a single-chip 5W wireless power receiver compliant with the Baseline Power Profile (BPP) specification of the WPC/Qi V-1.3 standard. The wireless power receiver provides regulated DC output power derived from alternating current that is electromagnetically coupled into the connected wireless power receiver coil.

The KTE7000 integrates a fully synchronous rectifier and low dropout regulator (LDO) to efficiently convert wireless AC power to a 5V regulated DC output with up to 1.5A output current. Embedded MCU with OTP/ROM provides Qi-1.3 communication with power transmitter, power management and multiple protections.

The KTE7000 is available in an advanced, fully “green” compliant 2.66mm x 3.90mm, 52-bump Wafer Level Chip Scale Package (6×9 WLCSP).

• Application areas
  Mobile Internet devices, Internet of Things, accessories
• Battery powered medical, industrial, consumer

wireless headphones, earphones