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IC Switching Voltage Regulators

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About IC Switching Voltage Regulators

IC switching voltage regulators are integrated circuits (ICs) that store energy in an inductor, transformer, or capacitor and then use this storage device to transfer energy from the input to the output in discrete packets over a low-resistance switch. Feedback circuitry regulates the energy transfer to maintain a constant voltage within the load limits of the circuit. There are several types of IC switching voltage regulators. Buck or step-down converters convert a higher DC input voltage to a lower DC output voltage of the same polarity. Boost or step-up converters convert a lower DC input voltage to a higher DC output voltage of the same polarity. Buck-boost converters can be used for either step-up or step-down conversions, and to reverse or invert voltage polarity. IC switching voltage regulators are more efficient than IC linear voltage regulators, but produce greater amounts of noise. The output voltage can be fixed, or adjusted to a value within a specified range.

Important specifications for IC switching voltage regulators include regulated output voltage, input voltage, output current, switching frequency, efficiency, duty cycle and operating temperature. Both the output regulated voltage (Volt) and the input voltage (VIN) are minimum and maximum amounts in continuous mode (DC). The output current (IOUT) is measured under specified conditions. Efficiency, the ratio of output power to input power, measures the ability of IC switching voltage regulators to convert input energy into output energy. For example, an efficiency of 100% means that all of the input energy is transferred to the output. The duty cycle is the ratio between the on and off time of the output transistor. The operating temperature is a full-required range.

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Integrated circuit (IC) linear voltage regulators use voltage-controlled sources to force a fixed voltage to appear at their output terminal.
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IC voltage regulators are three-terminal devices that provide a constant DC output voltage that is independent of the input voltage, output load current, and temperature. IC voltage regulators are used in power supplies that hold their output voltage constant over a wide range of load variations.

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Linear and Switching Voltage Regulator Fundamentals Abstract This paper will enable the user to understand the operation of switching and linear
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Part Numbers for IC Switching Voltage Regulators

Part # Distributor Manufacturer Product Category Description
TPS61103RGER Newark TEXAS INSTRUMENTS DC-DC Converters Switching Regulator IC; Input Voltage Primary Max:3.3V; Output Current Max:0.8A; Package/Case:24-VQFN; No. of Pins:24; Operating Temperature Range:-40?C to +85?C; Peak Reflow Compatible (260 C):No RoHS Compliant: Yes
TPS61031PWPG4 Newark TEXAS INSTRUMENTS DC-DC Converters Switching Regulator IC; Input Voltage Primary Max:5.5V; Output Current Max:1A; Package/Case:16-HTSSOP; No. of Pins:16; Operating Temperature Range:-40?C to +85?C; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes RoHS Compliant: Yes
TPS62301DRCR Newark TEXAS INSTRUMENTS DC-DC Converters Switching Regulator IC; Input Voltage Primary Max:6V; Output Voltage Max:1.5V; Output Current Max:0.5A; Switch Output Current Max, Isw:0.74A; Package/Case:10-VSON; No. of Pins:10; Operating Temperature Range:-40?C to +85?C RoHS Compliant: Yes
TPS54310PWPRG4 Newark TEXAS INSTRUMENTS DC-DC Converters Switching Regulator IC; Input Voltage Primary Max:6V; Output Voltage Max:3.3V; Output Current Max:3A; Switch Output Current Max, Isw:4A; Package/Case:20-HTSSOP; No. of Pins:20; Operating Temperature Range:-40?C to +125?C RoHS Compliant: Yes
TPS54673PWP Newark TEXAS INSTRUMENTS DC-DC Converters Switching Regulator IC; Input Voltage Primary Max:6V; Output Voltage Max:4.5V; Output Current Max:6A; Switch Output Current Max, Isw:7.2A; Supply Voltage Min:3V; Package/Case:28-HTSSOP; No. of Pins:28 RoHS Compliant: Yes

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