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DC-DC Converters & Voltage Regulators

Linear Low Dropout Regulator LDO

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

Our comprehensive portfolio supports buck, boost, buck-boost and SEPIC designs from 100mA 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.

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Comparison of Linear Regulators (LDOs) and Switching Regulators
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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 10 W
 
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.

 

DDR Termination Regulators

DDR Termination Regulators are an essential component to regulating power through DDR transmission lines. Microchip products provide reduced power dissipation and higher efficiency.

Charge Pumps

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

 
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MPLAB MINDI
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