Product category:
DC/DC Convertors
News Release from: Linear Technology Corp | Subject: LTM4605
Edited by the Electronicstalk Editorial
Team on 28 February 2008
Regulator module designs in wide supply
tolerance
Novel buck-boost regulator systems can regulate an output voltage from a variable input voltage greater than, less than or equal to the output voltage.
Linear Technology has extended its family of DC/DC uModule regulator systems with products that can regulate an output voltage from a variable input voltage greater than, less than or equal to the output voltage The LTM4605 is the first device in a new family of buck-boost products and operates from 4.5 to 20V inputs, regulates an output voltage from 0.8 to 16V and delivers an output power up to 150W
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The LTM4605 integrates a synchronous buck-boost DC/DC controller, four N-channel MOSFETs, input and output bypass capacitors and the compensation circuitry in a 15 x 15 x 2.8mm land grid array (LGA) plastic moulded package.
Only an inductor, feedback and sense resistors and bulk capacitors are required to implement a very low profile, compact and high efficiency design.
The LTM4605 provides a compact regulator solution in applications such as networking, industrial and automotive systems and high-power battery operated devices.
With the LTM4605's onboard proprietary four-switch synchronous MOSFET design, the product achieves up to 97.3% efficiency in boost mode and up to 97.7% efficiency in buck mode (4.5 to 20V input, 12V/5A output).
Whereas other topologies such as SEPIC (Single Ended Primary Inductor convertor) require as many as 20 components and custom magnetics, this buck-boost uModule solution uses only eight components and an off-the-shelf inductor.
In addition, the efficiency of a comparable SEPIC circuit is approximately 76-84%.
Furthermore, to reduce undesirable frequency harmonics, the LTM4605 is phase-lockable to an external clock frequency ranging from 200kHz to 400kHz.
Safety features include overvoltage and foldback current protection.
The LTM4605 is offered for operation from -40 to +85C temperature range.
1000-piece pricing starts at US $18.85 each. Request a free brochure from Linear Technology Corp ...
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