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DC-DC Conversion and Voltage Regulators including LDO Voltage Regulators, Switching Regulators and Charge Pumps

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Linear Low-Dropout (LDO) Regulators

Our linear LDO regulators feature ultra-low quiescent current, ultra-low dropout voltage, ultra-high ripple rejection, very accurate output, fast transient response, a wide selection of packages and a wide input voltage range.

Switching Regulators

Our comprehensive portfolio supports buck, boost, buck-boost and SEPIC designs from 100 mA peak output current up to 12A as well as multi-output regulators to support multiple point-of-load applications such as microprocessors, FPGAs and ASICs.

For higher-current applications, please see our selection of Analog and Hybrid PWM Controllers.

DDR Termination Regulators

DDR termination regulators are essential for regulating power through DDR transmission lines. Our products provide reduced power dissipation and higher efficiency.

Charge Pumps

Charge pump ICs convert and regulate voltage using capacitive energy storage elements. They are efficient and easy to use for applications with low-current requirements.

Space-Grade, Radiation-Hardened Isolated DC-DC Converters

The SA series of DC-DC converters is available in both triple and single outputs. These devices are designed and qualified for the rigors of space including characterization for both Total Ionizing Dose (TID) and Single Event Effects (SEE). Operating at a fixed frequency of 220 kHz, the SA family of parts can be externally synced with other frequency sources.

Explore Space Grade, Radiation-Hardened DC-DC Converters

Choosing Between an LDO and Switching Voltage Regulator

Design Considerations Linear Switching
Function Only steps down (buck) so input voltage must be greater than output voltage Step up (boost), step down (buck), inverts
 
Efficiency		 Low to medium, but actual battery life depends on load current and battery voltage over time; efficiency is high if difference between input and output voltages is small High, except at very low load currents (μA), where switch-mode quiescent current (IQ) is usually higher
Waste heat High if average load and/or input to output voltage difference are high Low, as components usually run cool for power levels below 10W
 
Complexity		 Low, usually requiring only the regulator and low-value bypass capacitors Medium to high, usually requiring inductor, diode, and filter caps in addition to the IC; for high-power circuits, external FETs are needed
Size Small to medium in portable designs, but may be larger if heatsinking is needed Larger than linear at low power, but smaller at power levels for which linear requires a heat sink
Total cost Low Medium to high, largely due to external components
Ripple/Noise Low; no ripple, low noise, better noise rejection Medium to high, due to ripple at switching rate

*If you have an emphasis on a particular design consideration, the option in bold may be the product type that best suits your needs.

Design Resources

MPLAB® Analog Designer

Provides design suggestions for common circuit needs, estimates performance for common modifications, and can export to MPLAB® Mindi™ Analog Simulator for verification.

MPLAB® Mindi™ Analog Simulator

Uses a SIMetrix/SIMPLIS environment to model circuit behavior, reducing design time with software debugging for initial design verification.

Power Check Design Service

Provides advice on your exact physical circuit layout, sharing best practices from an experienced power supply designer, so that physical hardware will match simulations.