ST Life.augmented


High voltage BST capacitance controller

The ST high voltage BST capacitance controller STHVDAC-304MF3 is a high voltage digital to analog converter (DAC), specifically designed to control and meet the wide tuning bias voltage requirement of the BST tunable capacitors.

It provides 4 independent high voltage outputs, thus having the capability to control 4 different capacitances in parallel. It is fully controlled through an RFFE serial interface.

BST capacitors are tunable capacitors intended for use in mobile phone applications, and dedicated to RF tunable applications. These tunable capacitors are controlled through a bias voltage ranging from 2 to 16 V. The implementation of BST tunable capacitors in mobile phones enables significant improvement in term of radiated performance, making the performance almost insensitive to the external environment.

pdf Please read
Errata Sheet
pdf データシート

Key Features

  • Dedicated ASIC to control BST tunable capacitances
  • Operation compliant with cellular systems requirements
  • Integrated boost converter with 4 programmable outputs (from 0 to 30 V)
  • Low power consumption
  • MIPI RFFE serial interface 1.8 V
  • Available in WLCSP for stand-alone or SiP module integration
  • Benefits
  • RF tunable passive implementation in mobile phones to optimize the radiated performance



Technical Documentation

Product Specifications

Description Version Size
DS8994: High voltage BST capacitance controller
3.0 344 KB

Application Notes

Description Version Size
AN4440: RFFE HVDAC control
1.0 1,547 KB

Technical Notes & Articles

Description Version Size
TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches
3.1 333 KB

サンプル& 購入

製品型名 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Order From STUnit Price (US$)*
@ 50
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STHVDAC-304MC3NRNDFlip-Chip 400uTape And Reel-.65No availability reported, please contact our Sales officeEcopack2PDF
STHVDAC-304MF3NRNDFlip-Chip 400uTape And Reel-.65No availability reported, please contact our Sales officeEcopack2PDF

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(**)弊社ホームページで入手できるMaterial Declaration(材料宣誓書)のフォームは、各パッケージ・タイプで最も一般的に使用されるパッケージに基づいた包括的な文書です。そのため、特定のデバイスについて100%正確ではない可能性があります。特定のデバイスに関する情報については、 弊社セールスオフィス にお問合せ下さい。
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