Linear Technology Manuals - Page 32

Linear Technology manuals, page 32

• LINEAR Supercapacitor-Based Power Backup Prevents Data Loss in RAID Systems Design Note 487 Jim Drew

  This document introduces a supercapacitor-based UPS system that provides backup power during power failures to allow the RAID controller to write volatile data to nonvolatile storage.

• LINEAR Step-Down Module Regulator Produces 15A Output from Inputs Down to 1.5V No Bias Supply Required 1.5V to 5.5V Input 0.8V to 5V Output from a 15mm × 15mm × 4.32mm LGA

  The LTM4611 is a switch mode, step-down DC/DC µModule® regulator in a compact 15mm × 15mm × 4.32mm LGA surface mount package. The switching controller, MOSFETs, inductor and supporting components are housed in the package. With a built-in differential remote sense amplifier, the LTM4611 can tightly regulate its output voltage from 0.8V to within 300mV of VIN and deliver 15A output efficiently from 1.5V to 5.5V input.

• LINEAR Of ine LED Lighting Simpli ed: High Power Factor Isolated LED Driver Needs No Opto-Isolators is TRIAC Dimmer Compatible Design Note 490 Wei Gu

  This document describes a high power factor, isolated LED driver that does not require opto-isolators and is compatible with TRIAC dimmers. The LT3799 integrates all the required functions for offline LED lighting.

• LINEAR Tiny 2-Cell Solar Panel Charges Batteries in Compact Off-Grid Devices Design Note 491

  This design note explains how to create a compact battery charger using a small 2-cell solar panel to provide renewable energy charging for battery-powered sensors and other devices located far from the power grid.

• LINEAR How to Produce Negative Output Voltages from Positive Inputs Using a Module Step-Down Regulator Design Note 1021 Jaino Parasseril

  This article describes how to generate negative output voltages from positive inputs using Linear Technology's DC/DC step-down μModule® regulators. A conventional buck μModule regulator can be easily configured as an inverting buck-boost converter to generate negative output voltages. The article uses LTM®8025 as an example to demonstrate how to achieve negative output voltages with level-shifting circuitry for synchronization. This approach can also be applied to other μModule regulators such as LTM8022, LTM8023, and LTM8027.

• LINEAR 36V 3.5A Dual Monolithic Buck with Integrated Die Temperature Monitor Standalone Comparator Block Design Note 492 Edwin Li

  The LT3692A is a dual-channel monolithic buck regulator that operates from inputs up to 36V and supports high output currents. It has high input voltage and high transient capability, making it suitable for harsh operating environments such as automotive environments. The regulator also provides an on-die temperature monitoring function, which facilitates application circuit design, debugging, and package thermal optimization.

• LINEAR Bootstrap Biasing of High Input Voltage Step-Down Controller Increases Converter Efficiency Design Note 493 Goran Perica Victor Khasiev

  This design note describes how to use the external power input pin (EXTVCC) to provide bias power to a high input voltage step-down controller, increasing the efficiency of the converter. This method can be used with controllers such as the LTC3890 (dual output) and LTC3891 (single output).

• LINEAR Driving a Low Noise Low Distortion 18-Bit 1.6Msps ADC Design Note 494

  The LTC2379-18 is an 18-bit, 1.6Msps SAR ADC with an extremely high SNR and THD. It also features a unique digital-gain compression function, which eliminates the need for a negative supply in the ADC driver circuit.

• LINEAR Simple Energy-Tripped Circuit Breaker with Automatic Delayed Retry Design Note 495

  This article describes an electronic circuit breaker, combining current sensing with timing to create an energy- tripped breaker, which protects sensitive circuits while minimizing nuisance trips.

• LINEAR Negative Buck Converter with Short-Circuit Protection Shutdown Design Note 1022 Victor Khasiev

  This document describes the design of the LTC3805-5 negative buck converter, which can output –3.3V at 3A from a –10V to –14V input voltage.

• LINEAR Design Note 497 Manual

  This design note introduces the LTC®4365, a unique solution that elegantly and robustly protects sensitive circuits from unpredictably high or negative supply voltages. The LTC4365 blocks positive voltages as high as 60V and negative voltages as low as –40V. Only voltages within the 5V to 36V window can pass through the device. The LTC4365 uses a high voltage window comparator and charge pump to achieve low power, reliable overvoltage and undervoltage protection.

• LINEAR Design Note 496 Manual

  This document introduces the LTC®4155 and LTC4156 dual multiplexed-input battery chargers, featuring PowerPath™ control, I2C programmability and USB On-The-Go for systems such as tablet PCs and other high power density applications. The LTC4155’s float voltage (VFLOAT) range is optimized for Li-Ion batteries, while the LTC4156 is optimized for lithium iron phosphate (LiFePO4) batteries, supporting system loads to 4A with up to 3.5A of battery charge current. I2C controls a broad range of functions and USB On-The-Go functionality is controlled directly from the USB connector ID pin.

• LINEAR Supercapacitor-Based Power Backup System Protects Volatile Data in Handhelds when Power Is Lost Design Note 498

  This design note introduces a power backup system based on supercapacitors that can protect volatile data in handheld devices in the event of a power loss. Supercapacitors are a compact, robust, and reliable power source that can meet the power requirements of a backup system for short-term power loss events.

• LINEAR Wide Input Voltage Range Boost/Inverting/SEPIC Controller Works Down to an Input Voltage of 1.6V Design Note 500

  The LT3759 is a wide input voltage range boost/inverting/SEPIC controller that operates from 1.6V to 42V. It offers both positive and negative output control and can be used in various power supply designs.

• LINEAR High Ef ciency 4-Switch Buck-Boost Controller Provides Accurate Output Current Limit Design Note 499 Tage Bjorklund

  LTC3789 is a high effi ciency 4-switch buck-boost controller that provides accurate output current limit