Controller offers buck-boost regulation
A Linear Technology Corp product story
Edited by the Electronicstalk editorial team Sep 21, 2009
Linear Technology offers a high-reliability (MP) grade version of the LTC3780, a very high efficiency synchronous buck-boost switching regulator DC/DC controller.
The controller operates from input voltages above, below or equal to the output voltage.
Linear Technology has announced a high-reliability version of the LTC3780, a synchronous buck-boost switching regulator DC/DC controller.
High power buck-boost circuits typically rely on transformers or two DC/DC converters, one for step-up (boost) and the other for step-down (buck) conversion.
The LTC3780MP operates using a single inductor and can deliver output power up to 150W with a single device.
Higher power can be achieved when multiple circuits are paralleled.
According to the company, with four-switch synchronous rectification, it can deliver efficiencies up to 98 per cent.
The LTC3780MP operates with a selectable fixed frequency between 200kHz and 400kHz, and can be synchronized to an external clock over the same range with its phased-locked loop (PLL).
It has a 4V to 36V input range and 0.8V to 30V output range and ability to offer transitions between operating modes makes it suitable for military, automotive and battery-powered systems.
The LTC3780MP employs a proprietary current control architecture for constant frequency operation in buck or boost mode and has powerful on-board MOSFET gate drivers.
Fault protection is provided for overvoltage, overcurrent and short circuit conditions in all operating modes.
The output voltage turn-on time can be adjusted with the device's programmable soft-start.
A power good output signals whether the output voltage is within regulation.
The user can select from continuous operation, pulse skipping and burst mode operation during light loads, which safely powers pre-biased loads.
The LTC3780MP operates and is tested over an operating junction temperature range of -55C to 125C and is offered in a 24-lead SSOP package.
1,000-piece pricing starts at USD7.24 each.
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Contact Linear Technology Corp
Tel +44 1628 477066
Other Linear Technology Corp stories
- Switching regulator is flexible about input
The LTC3780 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. - Linear modulator enhances basestation transmitters
A low frequency direct conversion quadrature modulator from Linear offers high linearity performance and low noise to enhance the dynamic range performance of basestation transmitters. - Overvoltage regulator has overcurrent protection
Linear Technology has introduced the LT4356-3, an overvoltage protection regulator with overcurrent protection and inrush current limiting for high availability systems. - Linear Technology launches power manager ICs
Linear Technology has launched the LTC4160 and LTC4160-1 power manager ICs for single-cell lithium-ion-/polymer-battery-based applications. - Two-terminal current source has wide voltage range
Linear Technology's LT3092 200mA two-terminal current source overcomes the problems associated with previous current sources, according to the company.
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