dc-dc
Low-cost, dual-/quad-channel, sink/source current DACs simplify power-supply adjustments
Submitted by Ionela on Wed, 07/02/2008 - 16:22.
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Maxim Integrated Products introduces the DS4422/DS4424 low-cost, dual-/quad-channel, sink/source current DACs. These I²C-controlled, 7-bit current DACs feature two (DS4422)/four (DS4424) output channels that are specifically designed for power-supply margining and adjustment. Each output channel provides control of a DC-DC power supply by sinking or sourcing current directly into the power supply's feedback node. This control technique allows existing power-supply designs to be margined and adjusted with minimal redesign, thus making the DS4422/DS4424 ideal for servers, video processing cards, and other DC-DC power-supply applications. |
LT3755: 60V, High Side Sense LED Controller for Boost, Buck or Buck-Boost High Current LED Applications
Submitted by Ionela on Tue, 06/10/2008 - 07:04.
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Linear Technology announces the LT3755, a 60V, high-side current sense DC/DC converter designed to drive high current LEDs. Its 4.5V to 40V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting. The LT3755 uses an external N-channel MOSFET and can drive up to 14 1A white LEDs from a nominal 12V input, delivering in excess of 50 watts. It incorporates a high-side current sense, enabling it to be used in boost, buck, buck-boost or SEPIC and flyback topologies |
LTM8021: 3VIN to 36VIN, 500mA DC/DC Switchmode uModule Regulator in Tiny Package Creates Space by Mounting on the Back of Board
Submitted by Ionela on Fri, 05/30/2008 - 07:22.
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Linear Technology Corporation introduces the LTM8021, a complete DC/DC uModule regulator point-of-load (POL) system with on-board inductor and power components in a package that resembles a surface-mount IC. The LTM8021 operates from input supplies from 3V to 36V (40Vmax) and delivers up to 500mA. The LTM8021's tiny footprint (6.25mm x 11.25mm), low profile (2.8mm) and light weight (0.49g), enable system designers to solder the device on the backside of the circuit board, creating room on top for digital ICs such as FPGAs, memory and passives including HDMI, Ethernet or SMA connectors. |
Freescale lightens the load for portable devices with small, ultra-energy-efficient analog buck regulator
Submitted by Ionela on Wed, 05/28/2008 - 07:12.
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To help portable design engineers bring power-efficient, small-form-factor products to market, Freescale Semiconductor has added the MC34726/27 DC/DC buck regulators to its analog portfolio optimized for space-constrained battery-powered applications.Manufactured with Freescale's SMARTMOS™ technology, the MC34726/27 devices are designed to enhance efficiencies at light loads and to improve standby time in mobile applications where Li-Ion or Li-Polymer batteries are the main power source. |
National Semiconductor Introduces Industry's First Emulated Current-Mode-Controlled Buck-Boost DC-DC Regulator Controller
Submitted by Ionela on Tue, 05/20/2008 - 07:12.
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National Semiconductor Corp. introduced the industry's first emulated current-mode-controlled buck-boost DC-DC regulator controller with a best-in-class operating voltage range of 3V to 75V for automotive, telecommunications and battery-powered systems. The LM5118 features programmable switching frequency up to 500 kHz, ultra-low shutdown current and smooth transition between buck and buck-boost modes. |
Zetex PR - Driver family meets demands of next generation LEDs
Submitted by Ionela on Mon, 03/17/2008 - 09:24.
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A family of three flexible LED Drivers from Zetex Semiconductors provides designers with the performance needed by the next generation of high brightness LEDs. The ZXLD132X inductive DC-DC converter series drive single or multiple LEDs with currents from 700mA through to 1.5A, in buck, boost and buck/boost configurations. Housed in a tiny 3mm x 4mm DFN package, the drivers can reduce the circuit footprint of existing solutions by up to 50%. |
