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Monolithic 2.5-MHz step-down DC/DC converter withstands 80-V transients
April 20, 2012 // Paul Buckley
Linear Technology Corporation has released a 60 V IN step-down switching regulator that can deliver dual 1 A outputs. The LT3988 operates within a V IN range of 4 V to 60 V, with overvoltage lockout protection against transients of 80 V.
The device is ideal for load dump and cold-crank conditions commonly found in automotive applications.
The LT3988 can be driven by two separate input rails or by a single input, maximizing design flexibility. Its internal 1.3 A switches deliver up to 1 A of continuous output current. Switching frequency is user-programmable from 250 kHz to 2.5 MHz, enabling the designer to maximize efficiency, while avoiding critical noise-sensitive frequency bands. The combination of its thermally enhanced MSOP-16E package and high switching frequency, which keeps the external inductor and capacitors small, provides a compact, thermally efficient footprint.
The LT3988 utilizes dual, high efficiency 1.3 A switches, with the necessary boost diodes, oscillator, control and logic circuitry integrated into a single chip. Its catch diode current sense (DA) pins protect the circuit during input voltage transients even at high switching frequencies while adding robust short-circuit protection. Anti-phase switching minimizes both input and output ripple. Special design techniques used in the LT3988 enable high efficiency over a wide input voltage range, and the device’s current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250 kHz to 2.5 MHz), internal loop compensation, thermal shutdown and tracking capability.
More information about the LT3988 at www.linear.com/product/LT3988
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Technology News
Automotive MCU benchmark takes energy efficiency into account
May 21, 2013
Today, cars are crammed with microprocessors, and many of them are not completely switched off when the driver parks and ...
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Business News
EnSilica partners Cross Border Technologies to boost sales growth in key European markets
-
Technology News
Industry's first ultra-wideband Doherty amplifiers support broadband operation
-
Technology News
Graphics chip recognizes nearby pedestrians and bicycles
-
Market News
EMS boom for medical industry says analyst
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Business News
Gemalto teams with Encore Networks for mission critical M2M communications as US shifts to wireless
May 21, 2013
European smartcard specialist Gemalto has teamed up with US machine-to-machine (M2M) router supplier Encore Networks to provide ...
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Market News
Solar industry capital spending hits seven-year low in 2013 but upturn is on the cards
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Market News
Apple's overseas tax evasion stirs debate over US tax code
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Market News
Could Intel enable USD200 Ultrabook?
Technical papers
Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
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The development platform for i.MX 6Quad from element14 (built to the Freescale SABRE Lite design) is an evaluation platform featuring the powerful i.MX 6Q, a multimedia application processor with Quad ARM Cortex-A9 cores at 1.2 GHz from Freescale Semiconductor.
This month, Freescale and element14 are giving away five such platforms, worth £128.06 each, for EETimes Europe's readers to win. The platform helps evaluate the rich set of peripherals and includes a 10/100/Gb Ethernet port, SATA-II, HDMI v1.4, LVDS, parallel RGB interface, touch screen interface, analog headphone/microphone, micro TF and SD card interface, USB, serial port, JTAG, camera interface, and input keys for Android.
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In our previous reader offer, Pico Technology was giving away one of its recently launched PicoScope 3207B, a 2-channel USB 3.0 oscilloscope worth 1451 Euros. Lucky winner Mr L. Sanchez-Gonzalez from Spain should be receiving his PicoScope 3207B soon. Let's wish them some interesting findings with his projects.
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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.
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