Source/sink step-down regulator offers adjustable current limit benefits
October 12, 2011 // Paul Buckley
Linear Technology has introduced a 36 V input constant frequency step-down µModule regulator with an adjustable output current limit up to 5 A. The adjustable current limit helps system designers set the maximum power delivered to a load, minimizing the output rating of the upstream AC/DC or DC/DC power supply.
Additionally, the LTM8052 is capable of sourcing or sinking current while regulating an adjustable output voltage. For simple noise filtering, the LTM8052 operates at a constant frequency throughout the entire output current range.
The µModule regulator converts an input voltage between 6 V and 36 V to an adjustable output voltage between 1.2 V to 24V. In a 12 V input to 2.5 V output application, the LTM8052 achieves a peak operating efficiency of 88% at 2 A. Applications include industrial, medical imaging and communications point of load, charge balancing and Peltier thermoelectric module drivers.
The LTM8052’s 10% accurate current limit is an improvement compared with traditional step-down regulators whose current limit can be 40%-50% greater than the actual output current. With the LTM8052, a lower power and less costly upstream power supply can be installed, which would otherwise require a greater output power rating to prevent a collapse of the voltage rail under an overcurrent or short-circuit condition.
The current limit may also be compensated for temperature using a thermistor for improved thermal management. When sinking current, the µModule regulator recovers energy, transferring it to the input rail rather than dissipating it as heat in conventional methods. For noise-sensitive applications, the LTM8052 can be synchronized to an external clock frequency in the range of 100 kHz to 1 MHz. Additional features include externally adjustable soft start, adjustable switching frequency and thermal shutdown.
Availability and Pricing
The LTM8052 is packaged within a thermally efficient 11.25 mm x 15 mm x 2.82 mm LGA package. The two temperature grades, E and I for the -40 to +125°C temperature range, are available for immediate delivery from stock. Pricing starts at $13.17 each for 1,000-piece quantities.
More information about the LTM8052 at
Webinar: Insight into the WiFi-offload technology and lab testing
August 20, 2014
On Wednesday, 24th September 2014 at 15h00 CET, Microwave Engineering Europe and Anritsu will present a webinar titled: 'An ...
mCube forms indoor navigation subsidiary
EBVchips get their own dedicated website
Elektrobit opens another automotive software R&D facility in Finland
Webinar: Printed circuit board test and in line automation
IDC: 300 million smartphones shipped in Q2
August 19, 2014
Vendors shipped a global total of 301.3 million smartphones in 2Q14, up by 25.3 percent from the 240.5 million units shipped ...
Will useless clock displays go with IoT integration?
10 finalists revealed for element14's “Hats Off” challenge
Dialog collaborates with Energous to develop wire-free charging
- Building Blocks for the Internet of Things
- New Linear Regulators Solve Old Problems
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
InterviewCEO interview: Tronics' Langlois makes moves in MEMS
Pascal Langlois has been CEO at Tronics for nine months. He discusses plans for the company and directions for the complex and diverse MEMS technology sector.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.