Step-down power module shrinks board space
Two new 4V to 36V power modules that measure 3.0mm x 3.8mm and require only two external components for operation have been launched by Texas Instruments.
The 0.5-A LMZM23600 and 1-A LMZM23601 DC/DC step-down converters achieve up to 92 per cent peak efficiency, which minimises energy loss, and feature tiny MicroSiP packaging that shrinks board space by up to 58 per cent.
The converters expand TI’s power module portfolio to address up to 1A performance-driven, space-constrained communication and industrial designs, including field transmitters, ultrasound scanners and network security cameras.
Both modules are offered with either fixed 5V or 3.3V output voltages, or with external synchronisation and adjustable 2.5V to 15V output voltages. The LMZM23601 features a mode pin that allows flexibility to operate at a fixed frequency for low electromagnetic interference or an automatic pulse frequency modulation control mode for high efficiency at light loads.
The power modules offer 85 per cent full-load efficiency for 24V to 5V power conversions. A quiescent current of 30-microA increases light-load efficiency and extends battery life in battery-powered applications.
Small 10-pin, 3.0mm x 3.8mm x 1.6mm MicroSIP package with integrated inductor enables a complete fixed 3.3V or 5V output solution measuring 27mm2.
With two external components, the module reduces solution size by up to 58 per cent when compared with a discrete solution with similar input and output voltages, output current and switching frequency.
Prototype samples of the 1-A LMZM23601 with an adjustable output voltage are available from TI. Production samples of the 0.5-A LMZM23600 with fixed output voltages, as well as the LMZM23601 with adjustable and fixed output voltages, will be available in May 2018.
The LMZM23600 is priced at $1.95 and the LMZM23601 is priced $2.40 and comes in 1,000-unit quantities.
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