1-A synchronous buck-boost DC/DC converter delivers extended battery run time for Li-Ion and alkaline-powered devices
August 04, 2011 // Paul Buckley
Linear Technology has introduced a synchronous buck-boost converter that delivers up to 1 A of output current from a Li-Ion/Polymer source or 300 mA from dual cell alkaline/NiCd/NiMH sources. The LTC3536ís 1.8 V to 5.5 V input and output voltage range achieves a Ī1% accurate output with inputs above, below or equal to the regulated output.
The latest generation single inductor buck-boost pulse width modulation (PWM) topology incorporated in the LTC3536 provides a continuous transition through all of the operating modes, making it ideal for noise-sensitive applications that must maintain a constant output voltage even as the battery voltage declines below the output. In many cases, this can increase battery run time 25% versus a buck regulator.
The LTC3536’s switching frequency is user programmable from 300 kHz to 2 MHz and can be synchronized to a system clock, optimizing the trade-off between efficiency and external component size. The combination of 1% output voltage accuracy, low noise, tiny externals and a 3 mm x 3 mm DFN package provides a small solution footprint, typically required in many handheld RF and precision measurement applications.
The LTC3536 includes two N-channel MOSFETs and two P-channel MOSFETs (R DS(ON) of 0.06 Ohm and 0.08 Ohm, respectively) to deliver efficiencies up to 95%. Burst Mode operation is user programmed to improve efficiency at light loads and requires only 28 uA of quiescent current. Shutdown current is less than 1 uA, further extending battery run time. Other features include soft-start, short circuit protection, current limiting and thermal shutdown.
LTC3536 is available from stock in thermally enhanced 10-lead 3mm x 3mm DFN and 12-lead MSOP packages in both E and I grades. Pricing starts at $2.75 each in 1,000-piece quantities.
More information about the LTC3536 synchronous buck-boost converter at www.linear.com/product/LTC3536.
Micrel's 10 criteria for choosing a MEMS foundry
April 18, 2014
Micrel Inc. (San Jose, Calif.) has prepared an article that lays out the 10 criteria to help guide someone in the choice ...
Superconducting qbits made immune to quasiparticle energy loss
The Filter Wizard: Just add a transistor
Mobile display revenues soar, leaving TV behind
European organic PV project aims for material gains
Nanomaterial-packed cathode extends range of EV lithium-sulfur batteries
April 17, 2014
Researchers at the USA's Department of Energy Pacific Northwest National Laboratory have developed a metal organic framework ...
Wearable computing market on 78% CAGR through 2018
OLED TV shipment delays stall OLED material growth
BMW updates navigation via mobile radio connection
- USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
- Measurement applications across multiple test platforms
- Supplying DC input power to string inverters
- Supplying DC input power for HEV testing
InterviewHeartbleed challenges the Internet of Thing
The Heartbleed security bug is a key example of the fundamental security challenge for the Internet of Things says Green Hills Software as it launches a new security group.
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, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.
Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.
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.