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STMicroelectronics’ new Ultra-Tiny Low-Dropout Regulator Powered with Bumpless Chip-Scale Package

STMicroelectronics

STMicroelectronics rolls out its new LDBL20, a 200mA Low-Dropout (LDO) regulator in a minuscule 0.47mm x 0.47mm x 0.2mm chip-scale package.

Engineered for wearable and portable devices and for flexible electronics such as multifunction connected smart cards, the LDBL20 extends ST’s family of compact LDOs, which includes devices from 2mm x 2mm DFN to a 0.69mm x 0.69mm CSP with 300mA output.

The new LDBL20’s bumpless STSTAMP package is sought to break through minimum I/O-area and height limitation imposed by the diameter of traditional flip-chip solder bumps, enabling unprecedentedly small footprints and low mounted heights.

Key Nuggets

  • In addition to its size advantage, the LDBL20 is claimed to be an outstanding performer with 200mA output, it oust larger devices performance from other manufacturers.
  • The input voltage can range from 1.5V to 5.5V, with 200mV typical dropout. Rejection (PSRR) of 80dB at 100Hz and 50dB at 100kHz simplifies filtering over a wide frequency range to provide a stable rail for low-power circuitry in battery-operated applications.
  • Quiescent current of 20µA no-load, 100µA full-load, and 0.3µA in standby help maximize efficiency under all operating conditions.

Applications

An evaluation board for the LDBL20, STEVAL-ISB034V1, is also available, which assists design-in to a wide range of products such as fitness and blood-pressure monitors, glucose meters, hearing aids, wearable sensors, smart headphones, portable audio devices, smart plugs, smart watches, and smartcards.

Additional info:

A wide range of output voltages is available on request, from 0.8V up to 5.0V in 50mV increments. Designers can also take advantage of built-in features of the LDBL20, which include logic-controlled electronic shutdown, internal soft-start, and support for active output-voltage discharge if required.

Availability and Pricing

The LDBL20 is in production now, priced from $0.25 for orders of 1,000 pieces.

Further info on product information page.

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