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A list of Inexpensive Switching Regulators

August 15th, 2015

Almost all designs have at least one switching regulator. In this article we are giving out a list of inexpensive switching regulators and we expect that one of these will fit in your requirement.

All the components listed fit in the same package - SOIC8 with exposed pad.

SOIC-8-exposed-pad

1. Richteck USA RT7247AHGSP - $0.256 in 2.5K
- 2 Amp load, Input Range 4.5V to 18V, Output Voltage range 0.8V to 15V

2. Alpha & Omega Semiconductor AOZ1050PI - $0.29 in 3K
- 2 Amp load, Input Range 4.5V to 18V, Output Voltage range 0.8V to 15V.3

3. Diode Inc. AP3503FMPTR-G1 - $0.29 in 2.5K
- 3 Amp load, Input Range 4.5V to 18V, Output Voltage range 0.925V to 16.25V

4. Diodes Inc. AP65552SP-13 - $0.319 in 2.5K
- 5 Amp load, Input Range 4.5V to 18V, Output Voltage range 0.76V to 6V

The above three have the same pinout.

pinout-pmic

A typical application schematics

aaplication-schematics

To calculate the Output Voltage use the general formula

Vout = Vref x ( 1+ R1 /R2)

Where R1 if the resistor connected between Output and Feedback pin and R2 is the resistor connected between Feedback pin and Ground.

The Vref is different for the different Regulators

Richteck USA RT7247AHGSP .8V
Alpha & Omega Semiconductor AOZ1050PI 0.8V
Diode Inc. AP3503FMPTR-G1 0.925V
Diodes Inc. AP65552SP-13 - 0.765V

One of these could be useful for your application that uses switching regulator.

You can use the Regulator Calculator to calculate the Output voltages and resistor values.

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