Power Management

Switching Regulator

Linear Technology manufactures a broad line of high performance switching regulator ICs with both synchronous and non-synchronous internal switches. These regulators offer typical input voltage capability from 2.25V up to 60V, switching frequencies up to 4MHz and high efficiency operation up to 96%. Also with Burst Mode operation, quiescent currents in the tens of micro-amps level can be attained. This combination of features allows very small, low profile circuit implementations with minimum external components.

Other features include adjustable or synchronizable switching frequency, small size, and more.

Step-Up (Boost) Regulators Step-Down (Buck) Regulators Buck-Boost Regulator Inverting Regulators SEPIC Regulators Multi-Topology DC/DC µModule Regulators Flyback, Foward and Isolated Controllers LCD/CCD/OLED Bias DDR Memory/Bus Termination Photoflash and Super Capacitor Charger Ultralow Noise Regulators Piezo Microactuator Driver Digitally Programmable Regulators

Linear Regulators (LDO)

Linear Technology manufactures a broad line of high performance low dropout linear regulators (LDO). These LDOs offer very low dropout, fast transient response, excellent line and load regulation, and have a very wide input voltage range, from 0.9V to 80V. Output currents range from 100mA to 10A, with positive, negative and multiple outputs.

 View our LDO FAQ's for answers to some common LDO questions

Positive Linear Regulators (LDO) Negative Linear Regulators (LDO) Discrete Pass Element Linear Regulators (LDO)

µModule Regulators

Linear Technology’s recent technical achievements in the performance of switching regulators and innovative packaging methods have finally allowed a new generation of point-of-load DC/DC regulators, including all the circuit components such as the inductor and power MOSFETs, to be shrunk and encapsulated in such a tiny size that they resemble a surface mount IC. These high-end point-of-load μModule regulators are complete solutions containing the DC/DC controller, MOSFETs, inductor, input and output bypass capacitors and compensation circuitry in only 2.25cm. Supported by Linear Technology’s rigorous testing and high reliability processes, the µModule family simplifies the design and layout of your next power supply.

For samples, please contact your local sales office or distributor.

For information on assembly, packaging and thermal issues related to the μModule package, please refer to the...

µModule Buck Regulators µModule Buck-Boost Regulators µModule LED Drivers

PMIC & Multifunction

Many of Linear Technology's battery management products combine the functionality of our standalone battery chargers with one or more other functions.  Power management IC (PMIC) products combine battery charging, PowerPath control and one or more DC-DC regulators for a complete power solution for handheld products.  Linear Technology's PowerPath products and architecture allow the load to be powered from both Vin and the battery, ensuring shorter charging times and more flexibility for the portable device designer.  They also enable "instant on" in systems with a depleted battery.  Other features combined with our battery chargers include dual inputs for USB and Wall Adapter, switching regulators, comparators, or LDOs.

For more information, download the PMIC Selector Guide

PMIC (DC-DC, PowerPath and Battery Charger) USB Power Manager (PowerPath, Battery Charger) Battery Charger Plus DC-DC Multi-Topology DC/DC

Inductorless (Charge Pump) DC/DC Converters

Linear Technology's family of charge pumps offers the widest election of simple and compact inductorless DC/DC converter designs. These converters can be used to step-up, step-down or invert an input voltage. By eliminating the inductor, these switched capacitor converters provided small solution footprint and a simpler design. Furthermore, by incorporating Spread Spectrum technology on-chip, both input and output noise are significantly reduced.

Regulated Step Up Charge Pumps Regulated Step Down Charge Pumps Regulated Buck Boost Charge Pumps Regulated Inverting Charge Pumps Unregulated Doubling/Inverting Charge Pumps Inductorless (Charge Pump) LED Drivers GaAsFET Bias Generators Flash Memory Programming

LED Driver ICs

Linear Technology has a very broad line of LED driver ICs for automotive, display backlighting, handheld and general lighting applications. They are configured as either Inductorless white LED drivers (for LEDs in parallel), or Inductor based white LED drivers (for LEDs in series). Topologies include boost regulator LED drivers, buck regulator LED drivers, buck-boost LED drivers and more. Regardless of topology, these LED driver ICs offer the highest efficiency, lowest noise, and the smallest footprints. Other features include integrated Schottky diodes, accurate LED current matching and multiple output capability.

Step-Up (Boost) LED Drivers Step-Down (Buck) LED Drivers Buck-Boost LED Drivers Multi-Topology LED Driver Inductorless (Charge Pump) LED Drivers µModule LED Drivers

Battery Management

Linear Technology manufactures a comprehensive line of high performance battery charger IC for any rechargeable battery chemistry, including Lithium-Ion, Lead Acid, and Nickel based. These battery charger IC are offered in linear or switching topologies and are completely autonomous in operation. Our battery charger IC offer many standard features for battery safety and management, including on-chip battery pre-conditioning, thermal regulation, NTC interface and dual Smart Battery systems management with SMBus or I2C interface.

Battery Charger IC PMIC (DC-DC, PowerPath and Battery Charger) USB Power Manager (PowerPath, Battery Charger) Battery Charger Plus DC-DC Battery Charging Support Functions Multicell Battery Stack Monitor

Power Control

Power control products include ideal diodes, PowerPath controllers, MOSFET drivers, bridge drivers and other non-regulator power applications.

PowerPath Controllers / Ideal Diodes High Side Switches and MOSFET Drivers Circuit Breakers & Overvoltage Protection Bridge Drivers PCMCIA Switches and Drivers PWM Controllers Offline Controllers/PFC Thermoelectric Cooler Controller

Current Sources

Constant current sources can be designed using a number of standard analog building blocks, including op amps, LED drivers and battery chargers.  Linear Technology also offers a family of dedicated constant current sources that offer ease of use and design, voltage, current and thermal protection and built in current limiting.

Hot Swap IC

Hot swap controller ics from Linear Technology limit in-rush current, provide current limiting during normal operation and offer other supervisory features. Applications include high reliability -48V or +48V telecom and networking, Power over Ethernet (PoE), ATCA, PCI, CompactPCI and low voltage supply sequencing.

High Voltage Hot Swap IC Low Voltage Hot Swap IC PCI Hot Swap Power-Over-Ethernet (PoE) Interface Controllers

Power-Over-Ethernet (PoE) Interface Controllers

Power Over Ethernet (POE) Controller ICs for both the sourcing (PSE) and receiving (PD) sides of the IEEE 802.3af application. Industry-leading devices that meet the compliance requirements as well as the ruggedness requirements of the application.

System Supervisor, Monitor and Control

This extensive family of parts includes voltage supply monitors, trackers, margining controllers, sequencers, push button controllers and the new power monitors.  All of these devices improve DC/DC converter functionality and feature a high degree of accuracy, integration and configurability, resulting in more cost efficient designs that would otherwise be burdened with multiple complicated components when designed the "traditional way".  The System Monitor and Control family strives to provide convenient all-in-one solutions for many of today's growing number of digital power management applications.

Supervisory Circuits Sequencers, Trackers, and Margining Controllers Push Button Controllers Fan Speed Controllers Power Monitors

Power Management Evaluation Kits

Linear Technology evaluation kits allow quick and easy testing and prototyping for many of our products. If you cannot find an Evaluation Kit for the product you are interested in on our web site, please contact your local sales office.