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 LTC3536’s 1.8 V to 5.5 V input and output voltage range achieves a ±1% 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.
3D Sound Labs cracks user-centric surround sound
April 27, 2015
French startup 3D Sound Labs is now taking pre-orders for its Neoh headphones which it claims produce a truly immersive, ...
Wireless charging gets universal antenna
European Space Agency to send ultracapacitors into orbit
A clean MIPS slate for academia
Design win; IDT meets IKEA
Eurotech to offload its cloud offering to iNebula
April 24, 2015
Italian companies Eurotech and iNebula have joined their forces to provide what they claim will be the industry's first cloud ...
Electric vehicles: Driving range decides
Samsung details its flex display
3D-printing aerogels for energy storage
- Smart Capacitive Design Tips
- Wireless MCUs and IoT
- Battery Management System Tutorial
- Deciding if Automated Test is right for your Company
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
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, DecaWave is offering EETimes Europe's readers the chance to win two TREK1000 kits to evaluate its Ultra-Wideband (UWB) indoor location and communication DW1000 chip in different real-time location system topologies.
Worth €947, the kit allow designers to prove a concept within hours and have a prototype ready in days. Based on the two-way ranging scheme, the kit lets you test...MORE INFO AND LAST MONTH' WINNERS...
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.