Tag Archives: boost

2A, 70V SEPIC/Boost DC/DC converter with 7µA Iq

8494

by Graham Prophet @ edn-europe.com:

LT8494 is a current mode, fixed frequency SEPIC/boost DC/DC converter with an internal 2A, 70V switch. Quiescent current of 7µA suits the device for always-on automotive or other industrial battery powered systems.

The LT8494 starts up from an input voltage range of 2.5V to 32V and once running it operates from inputs from 1V to 60V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs. The LT8494 can be configured as a boost, SEPIC or flyback converter. Its switching frequency can be programmed via a single resistor to between 250 kHz and 1.5 MHz, enabling designers to minimise external component sizes. The combination of a thermally enhanced TSSOP-20E or 4 x 4 mm QFN package and small externals ensures a very compact footprint.

2A, 70V SEPIC/Boost DC/DC converter with 7µA Iq – [Link]

TPS61093-Q1 Low Input Boost Converter With Integrated Power Diode

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The TPS61093-Q1 is a 1.2-MHz, fixed-frequency boost converter designed for high integration and high reliability. The IC integrates a 20-V power switch, input/output isolation switch, and power diode. When the output current exceeds the overload limit, the isolation switch of the IC opens up to disconnect the output from the input. This disconnection protects the IC and the input supply. The isolation switch also disconnects the output from the input during shut down to minimize leakage current. When the IC is shutdown, the output capacitor is discharged to a low voltage level by internal diodes. Other protection features include 1.1-A peak overcurrent protection (OCP) at each cycle, output overvoltage protection (OVP), thermal shutdown, and undervoltage lockout (UVLO).

TPS61093-Q1 Low Input Boost Converter With Integrated Power Diode – [Link]

High Voltage Buck-Boost Regulator

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8056

The LTM8056 from Linear Technology is a 58 VIN, buck-boost μModule® (micromodule) regulator which requires just a few external passive components to complete the regulator design. Included in the package are the switching controller, power switches, inductor and support components. The basic external components needed are a single resistor to set the switching frequency, a resistor divider network to set the output voltage together with input and output capacitors. Other features such as input and output average current regulation may be implemented with just a few additional components. The LTM8056 operates with an input voltage ranging from 5 V to 58 V and can supply a regulated output voltage between 1.2 V and 48 V. The SYNC input and CLKOUT signal output provide clock synchronization options.

High Voltage Buck-Boost Regulator – [Link]

TPS6122x low input voltage, 0.7V boost converter with 5.5μA quiescent current

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An application note from TI, TPS6122x low input voltage, 0.7V boost converter with 5.5μA quiescent current (PDF!):

The TPS6122x family devices provide a power-supply solution for products powered by either a single-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output currents depend on the input-to-output voltage ratio. The boost converter is based on a hysteretic controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent currents. The output voltage of the adjustable version can be programmed by an external resistor divider, or is set internally to a fixed output voltage. The converter can be switched off by a featured enable pin. While being switched off, battery drain is minimized. The device is offered in a 6-pin SC-70 package (DCK) measuring 2 mm x 2 mm to enable small circuit layout size.

TPS6122x low input voltage, 0.7V boost converter with 5.5μA quiescent current – [Link]

Buck-boost converter works with dual inputs

3118by Susan Nordyk @ edn.com

A synchronous buck-boost DC/DC converter that accepts 2.2 V to 18 V on each of its two inputs, the LTC3118 from Linear Technology enables high-efficiency operation from either input source to a programmable output voltage above, below, or equal to the inputs. Its dual-input capability is suitable for applications that employ batteries or supercaps as secondary or backup inputs, as well as those that use multiple sources, such as a wall adapter and Li-Ion cells.

The current-mode converter has a fixed 1.2-MHz switching frequency and furnishes up to 2 A of continuous output current from a wide range of power sources, including single or multiple-cell batteries, supercapacitor stacks, and wall adapters. Output voltage is programmable from 2 V to 18 V. Integrated low-loss PowerPath control is also user-programmable to prioritize and seamlessly transition between inputs, while maintaining output voltage regulation.

Buck-boost converter works with dual inputs – [Link]

LTC3899 – 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller

3899

The LTC®3899 is a high performance triple output (buck/ buck/boost) DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages. The constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The LTC3899 operates from a wide 4.5V to 60V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC3899 can operate from an input supply as low as 2.2V after start-up.

LTC3899 – 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller – [Link]

LTC3402 – 2A, 3MHz Micropower Synchronous Boost Converter

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LT3042

The LT3042 is an ultralow noise, ultrahigh power supply ripple rejection (PSRR) low dropout voltage linear regulator. Its unique design features ultralow spot noise of only 2nV/√Hz at 10kHz and 0.8μV integrated output noise across a wide 10Hz to 100kHz bandwidth. Low frequency PSRR exceeds 90dB out to 10kHz and high frequency PSRR exceeds 75dB out to 3MHz, quieting noisy or high ripple input supplies. The LT3042 delivers up to 200mA output current with a 350mV dropout voltage at full load, across a wide 1.8V to 20V input voltage range. The LT3042 utilizes LTC’s proprietary LDO architecture – a precision current source reference followed by a high performance unity gain buffer, resulting in virtually constant bandwidth, noise, PSRR and load regulation performance independent of output voltage. In addition, this architecture permits paralleling of multiple LT3042s to further decrease noise, increase output current and spread heat on a printed circuit board (PCB).

LTC3402 – 2A, 3MHz Micropower Synchronous Boost Converter – [Link]

 

 

Buck/boost/inverting controller delivers up to 20 A

8709

by Susan Nordyk @ edn.com:

A synchronous PWM controller for negative-to-negative or negative-to-positive DC/DC conversion, the LT8709 from Linear Technology is easily configured for buck, boost, buck-boost, and inverting topologies to accommodate a wide range of power-supply designs. The device’s synchronous operation means that the output diode is replaced with a high-efficiency P-channel MOSFET, increasing efficiency and allowing for higher output currents of up to 20 A. It also eliminates the heat sink typically required in medium- to high-power applications.

The LT8709 operates over an input range of -4.5 V to -80 V and produces an output from -0.1 V to as high as 60 V or from -1.4 V to as low as -80 V. Its rail-to-rail output-current monitor and control enable the device to be configured as a current source. The controller has an EN/FBIN pin that accepts slowly varying input signals, as well as an adjustable undervoltage lockout function.

Buck/boost/inverting controller delivers up to 20 A – [Link]

LiPo Booster, a breadboard-friendly boost converter board based on TPS61230

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Jianan Li made this LiPo Booster project, that is available at Github:

LiPo Booster is a breadboard-friendly boost converter board based on the TPS61230 IC from Texus Instrument. It has an output voltage of 5V, and is designed to be used with a single cell LiPo battery.

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LiPo Booster, a breadboard-friendly boost converter board based on TPS61230 – [Link]