Tag Archives: regulator

5V Step Down DC-DC Converter

5V-STEP-DOWN-DC-TO-DC-CONVERTER-PIC

The Tiny Step-Down DC-DC converter project provides 5V 500mA output from supply input up to 25V DC. 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.

Features

  • Input 12- 25V
  • Output 5V, 500mA
  • Output filter for clean output
  • Output Voltage Fine Adjustable 20%
  • Header Connector for Output/Input Connections
  • Low Standby Current
5V Step Down DC-DC Converter – [Link]

Buck regulator accepts 3.0-V to 42-V input

8608

Linear Technology Corporation announces the LT8608, a 1.5A, 42V input synchronous step-down switching regulator. A unique synchronous rectification topology delivers 93% efficiency while switching at 2MHz enabling designers to avoid critical noise-sensitive frequency bands, such as AM radio, while using a very compact solution footprint. Burst Mode® operation keeps quiescent current under 2.5μA in no-load standby conditions making it ideal for always-on systems. Its 3.0V to 42V input voltage range makes it ideal for automotive applications which must regulate through cold-crank and stop-start scenarios with minimum input voltages as low as 3.0V and load dump transients in excess of 40V. Its internal 2A switches can deliver up to 1.5A of continuous output current. The LT8608 maintains a minimum dropout voltage of only 200mV (@500mA) under all conditions, enabling it to excel in scenarios such as automotive cold-crank. Spread spectrum frequency modulation and special design techniques offer low EMI operation to minimize noise concerns in automotive and industrial environments. Furthermore, a fast minimum on-time of only 45ns enables 2MHz constant frequency switching from a 16V input to a 1.5V output. The LT8608’s 10-lead thermally enhanced MSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.

Buck regulator accepts 3.0-V to 42-V input – [Link]

BooSTick – small AA voltage booster

BooStick

A single AA battery provides voltages of 5V or 3.3V for hardware prototyping.

This tiny board allows you to bring the power to your project, and not the other way around. Bring your micro to the sensor without running wires! A single AA battery is used to provide breadboard power of 5V or 3.3V (or other voltages by tuning the feedback resistors). A boost regulator provides the voltage.

BooSTick – small AA voltage booster – [Link]

5V to 12V Step Up DC-DC Converter

5V-to-12V-Step-up-converter-500x500

Step up DC-DC converter is based on LM2577-ADJ IC, this project provides 12V output using 5V input, maximum output load 800mA. The LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), fly back, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and fly back transformers designed to work with these switching regulators. Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and under voltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.

Features

  • Requires Few External Components
  • Input 5V DC
  • Output 12V DC
  • Output Load 800mA
  • Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit
  • 52 kHz Internal Oscillator
  • Soft-start Function Reduces In-rush Current During Start-up
  • Output Switch Protected by Current Limit, Under-voltage Lockout, and Thermal Shutdown

5V to 12V Step Up DC-DC Converter – [Link]

Choose the right step-up/down voltage regulator for portable applications

F3x600

Reno Rossetti & Inyong Kim discuss about the power needs on portable devices and help us choose the right regulator.

A popular power source for portable devices is a single lithium-ion cell with 4.2V at full charge and 2.8V at end of discharge. However, some functions within portable electronics, such as a SIM card and DSP, require 2.8V and 3.3V. These are normally provided by low noise LDOs. The LDOs inputs (VCC) must be at a slightly higher voltage than the highest LDO output. Hence, VCC ends up right in the middle of the lithium-ion battery’s range of operation.

Choose the right step-up/down voltage regulator for portable applications – [Link]

LTM8064 – 58VIN, 6A CVCC Step-Down μModule Regulator

160322edne-linear8064

LTM8064 is a step-down DC/DC µModule (micro-module/power module) regulator with a 6V to 58V (60Vmax) input voltage range and adjustable load current control with ±10% accuracy at 7A.

Linear Technology introduces the LTM8064, a step-down DC/DC µModule® (power module) regulator with a 6V to 58V (60Vmax) input voltage range and adjustable load current control with ±10% accuracy at 7A. The LTM8064 can be used as a point-of-load step-down regulator operating from 24V, 36V and 48V voltage rails used in communication infrastructure, high end computers, test equipment, automotive, avionics and a wide variety of industrial equipment. In addition, the LTM8064 operates as a constant current source to precisely regulate and control (adjust) the load current up to 7A when sourcing and 9.1A when sinking. Applications requiring precision load current control include Peltier devices for cooling and heating, battery and supercapacitor chargers, LED and laser drivers, and motor and fan controllers.

LTM8064 – 58VIN, 6A CVCC Step-Down μModule Regulator – [Link]

36V, 800mA Robust Linear Regulator Has Extended SOA

3089

Linear Technology Corporation announces the LT3089, a rugged 800mA wide input voltage range linear regulator with key usability, monitoring and protection features. The device has an extended safe operating area (SOA) compared to existing regulators, making it ideal for high input-to-output voltage and high output current applications where older regulators limit the output. The LT3089 uses a current source reference for single resistor output voltage settings and output adjustability down to 0V. Output current limit can be set externally with a single resistor. This regulator architecture, combined with low millivolt line and load regulation, enables multiple ICs to be paralleled easily for heat spreading and higher output current. The current from the device’s current monitor can be summed with the set current for line-drop compensation, where the output of the LT3089 increases its current to compensate for line drops.

36V, 800mA Robust Linear Regulator Has Extended SOA – [Link]

LT3091 – –36V, 1.5A Negative Linear Regulator with Programmable Current Limit

3091

Linear Technology Corporation announces the LT3091, the latest addition to our LDO+ family, a 1.5 A low dropout negative linear regulator featuring low noise, rail-to-rail operation, precision programmable current limit and a bidirectional output current monitor. The device is cable-drop compensation capable, easily paralleled for higher current or circuit board heat spreading, and configurable as a 3-terminal floating regulator. The LT3091’s input voltage range is –1.5 V to –36 V. A single resistor programs the adjustable rail-to-rail output voltage from 0 V to –32 V and dropout voltage is only 300 mV (typical at full load).

LT3091 – –36V, 1.5A Negative Linear Regulator with Programmable Current Limit – [Link]

Single Regulator contains buck and boost controllers

7812

Linear Technology Corporation introduces the LTC7812, a dual output (boost + buck), low quiescent current synchronous DC/DC controller. When cascaded, its independent step-up (boost) and step-down (buck) controllers regulate the output voltage from an input voltage that can be above, below or equal to the output voltage, maintaining output regulation during cold crank and load dump conditions. Unlike conventional single inductor buck-boost regulators, the LTC7812’s cascaded boost + buck solution provides fast transient response with continuous, non-pulsating, input and output currents, substantially reducing ripple voltage and electromagnetic interference (EMI), making it ideal for automotive, industrial and high power battery operated systems.

Single Regulator contains buck and boost controllers – [Link]

SOS webinar – Simple and efficient solution for wide voltage range applications

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LINEAR TECHNOLOGY
Term: 2015.11.25 10:00 – 11:30 CET

Learn more about available topologies for input voltage higher and lower from output level. Focus on the most efficient way to convert power in four-switch buck-boost topology.

  • available topologies of Vin min < Vout < Vin max and differences between them
  • four-switch buck-boost topology as the most efficient, flexible and the smallest solution
  • buck-boost solutions from Linear Technology, applied to real end-devices
  • Diskusia

SOS webinar – Simple and efficient solution for wide voltage range applications – [Link]