LTC3636 and LTC3636-1 are high efficiency, 4 MHz synchronous dual output buck regulators that incorporate a constant frequency/controlled on-time, current mode control scheme with phase lockable switching frequency. Their design architecture reduces conducted and radiated emissions.
Tag Archives: DC-DC
LTC7820 is, a high power fixed ratio charge pump DC/DC controller that eliminates the power inductor in a non-isolated intermediate bus converter, allowing up to a 50% reduction in circuit size and up to 4000 W/in³ power density. The 72V fixed-ratio DC/DC controller can deliver 500W. – See more at: http://www.eedesignnewseurope.com/news/linear-applies-switched-capacitor-step-down-topology-inductor-less-dcdc#sthash.pJcu7NoB.dpuf
Linear applies switched-capacitor step-down topology for inductor-less DC/DC – [Link]
Measuring 2.5×2.0×1.0mm, the newly‐developed XCL102/XCL103 series of step‐up micro DC/DC converters is designed with built‐in inductors and control ICs. By Julien Happich @ edn-europe.com:
The use of built‐in inductors also allows PCB layouts to be simplified, minimizing unwanted radiation noise and operational trouble. The input voltage can be selected from 0.65V (operation hold voltage) to 6.0V, and the output voltage from 2.2V to 5.5V
Step‐up DC/DC converters with built‐in inductors and control ICs – [Link]
The Step-Up DC-DC Converter project provides 28V, 175mA output with input of 12V DC. The MC34063A IC is heart of the project from On semiconductor. The MC33063A is a monolithic control circuit containing the primary functions required for DC-DC converters. This device consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC specially designed to be incorporated step-down, step-up, and voltage-inverting applications with minimum number of external components.
- Input 12V DC
- Output 28V, 175mA
- Output Voltage Adjustable By On-board Preset
- Header Connector for Output/Input Connections
- Low Standby Current
Step Up DC-DC Converter – 12V TO 28V DC 175mA – [Link]
12V To 24V Booster is based on LM2588 IC from Texas Instruments. The LM2588 regulator integrated circuit specifically designed for fly-back, step-up (Boost) , and forward converter. The board provides 24V DC 1A DC output, Input 8V to 16V DC. Board has minimum components, screw terminal provided for input & outputs.
- Supply Input 8V To 16V DC ( Ideal 12V DC)
- Output 24V 1A
12V to 24V 1A DC-DC Boost Converter using LM2588 – [Link]
This project shows a DC-DC buck boost circuit which can produce an output of 3.3V for an input of 2.7V to 4.2V , for example from a Li-on battery. The Circuit uses LTC3440 Buck boost IC which is a fixed frequency boost converter. To get high efficient results, inductor with high frequency core material should be used.
- Input(V): 2.7V DC to 4.2V DC
- Output(V): 3.3V DC
- Output load: 600mA
2.7V-4.2V input to 3.3V output Buck-Boost Converter – [Link]
The LT8390, is a synchronous buck-boost DC/DC controller that can regulate output voltage, and input or output current from input voltages above, below and equal to the output voltage. Its 4V to 60V input voltage range and 0V to 60V output voltage range are ideal for voltage regulator, battery and supercap charger applications in automotive, industrial, telecom and even battery-powered systems. The LT8390’s 4-switch buck-boost controller, combined with 4 external N-channel MOSFETs, can deliver from 10W to over 400W of power with efficiencies up to 98%. Its buck-boost capability is ideal for applications such as automotive, where the input voltage can vary dramatically during stop/start, cold crank and load dump conditions. Transitions between buck, buck-boost and boost operating modes are seamless, offering a well regulated output even with wide variations of supply voltage. The LT8390 is offered in either a 28-lead 4mm x 5mm QFN or thermally enhanced TSSOP to provide a very compact solution footprint. [source]
LT8390 – 60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum – [Link]
A wide input range of 4.5 V to 40 V enables the TS3004x series of DC/DC synchronous buck regulators from Semtech to work in a wide range of applications, including industrial, telecommunication, and consumer. The current-mode TS30041 and TS30042 furnish 1 mA and 2 mA of continuous output current, respectively, and include integrated power switches and robust fault protection in a small 3×3-mm, 16-lead QFN package. by Susan Nordyk @ edn.com
Semtech TS3004x – Buck regulators accept up to 40-V input – [Link]
If you have ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The LC-04 bi-directional logic level converter is a small device that safely steps down 5V signal to 3.3V and steps up 3.3V to 5V at the same time. In this instructable, mybotic explained the procedure to use the LC-04 bi-directional logic converter.
The LC-04 module offers bi-directional shifting of logic level for up to four channels. The logic level HIGH (logic 1) on each side of the board is achieved by 10K Ω pull-up resistors connected to the respective power supply. This provides a quick enough rise time of logic level to convert high frequency (400KHz I²C, SPI, UART etc.) signals without delay.
This module has the following features:
- Dual-supply bus translation :
- Lower-voltage (LV) supply can be 1.5 V to 7 V
- Higher-voltage (HV) supply can be LV to 18 V
- Four bi-directional channels
- Small size: 0.4″ × 0.5″ × 0.08″ (13 mm × 10 mm × 2 mm)
- Breadboard-compatible pin spacing
The LC-04 logic level converter has two types of pins:
- Voltage input pins :
- 2 pins (GND and LV) on Low Voltage side
- 2 pins (GND and HV) on High Voltage side
- Data channels :
- 4 pins (LV1, LV2, LV3, and LV4) on Low Voltage side
- 4 pins (HV1, HV2, HV3, and HV4) on High Voltage side
Pin HV and LV set HIGH (logic 1) logic level on High voltage side and Low voltage side respectively, with respect to the GND.
Data channel pins shift logic levels from one voltage reference to another. A low voltage signal sent into LV1, for example, will be shifted up to the higher voltage and sent out through HV1. Similarly, a high voltage signal sent into HV1 will be shifted down to the lower voltage and sent out through LV1.
- LC-04 4 Channel Logic Level Converter
- Arduino Uno Board and USB Cable
- Crocodile Clip (optional)
The wiring is pretty simple. You may even omit the breadboard by making end-to-end connections. Two types of connections are required:
- Pin connection to shift down (5V to 3.3V)
- Pin connection to shift up (3.3V to 5V)
Pin Connection to Shift Down:
- LV to 3.3V
- LV’s GND to multimeter’s black probe
- LV3 to multimeter’s red probe
- HV to 5V
- GND to UNO’s GND
- HV3 to Digital Pin 4
Pin Connection to Shift Up:
- LV to 3.3V
- LV’s GND to UNO’s GND
- LV3 to Digital Pin 4
- HV to 5V
- GND to multimeter’s black probe
- HV3 to multimeter’s red probe
The device’s 3V to 100V input voltage range suits it for 48V automotive systems, dual battery transportation, industrial and 36V to 72V telecom applications. Its internal high efficiency switches can deliver up to 600 mA of continuous output current to voltages as low as 0.8V.
LT8630 – 100V, 600 mA synchronous buck DC/DC betters 93% efficiency – [Link]