STMicroelectronics LDBL20 low-dropout regulator

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STMicroelectronics has introduced the LDBL20, a 200 mA low-dropout (LDO) regulator in a 0.47 x 0.47 x 0.2 mm chip-scale package that is suitable for wearable and portable devices and for flexible electronics such as multifunction connected smart cards. The product’s bumpless STSTAMP package breaks through the minimum I/O area and height limitation imposed by the diameter of traditional flip-chip solder bumps, enabling small footprints and low mounted heights.

The 200 mA output makes the product as powerful as larger devices from other manufacturers. The input voltage can range from 1.5 to 5.5 V, with 200 mV typical dropout. Rejection (PSRR) of 80 dB at 100 Hz and 50 dB at 100 kHz simplifies filtering over a wide frequency range to provide a stable rail for low-power circuitry in battery-operated applications. Quiescent current of 20 µA no-load, 100 µA full-load and 0.3 µA in standby help maximise efficiency under all operating conditions.

A wide range of output voltages is available on request, from 0.8 up to 5 V in 50 mV increments. Designers can take advantage of built-in features including logic-controlled electronic shutdown, internal soft-start and support for active output-voltage discharge if required. An evaluation board for the device, STEVAL-ISB034V1, assists design-in to a wide range of products.

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