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Diode LDO regulators boast adjustable output voltage

Posted: 28 Jan 2013 ?? ?Print Version ?Bookmark and Share

Keywords:LDO? linear regulators? high-efficiency systems? AP7175? AP7176B?

A pair of ultra-low dropout (LDO) linear regulators has been recently unveiled by analog IC manufacturer Diodes Incorporated. Diode's AP7175 and AP7176B linear regulators deliver a continuous 3.0A output for dropout voltage of just 0.23V. With maximum input voltages of 3.65V and 5.5V respectively, the AP7175 and AP7176B provide an adjustable output voltage suitable for high-efficiency systems in a wide range of products including notebooks, PCs and set-top boxes.

The AP7175 and AP7176B also integrate a soft-start function that reduces in-rush current during the start-up period, which is typically 0.6ms. In addition, the LDOs' on-board current limit, short-circuit and thermal shutdown protection functions ensure that connected loads are fully protected against any possible current excesses.

Both LDOs provide an enable input and power-good output, allowing users to configure custom power management solutions with different start-up and power-down characteristics. When disabled, the devices also facilitate automatic discharge of the output voltage stored on the output capacitor, improving system reliability.

Both LDOs are provided in the reduced thermal impedance, industry-standard SO-8EP and smaller form factor MSOP-8EP exposed pad packages. These packages reduce the junction-to-case temperature differential, enabling the devices to deliver high load currents over their whole -40C to 85C ambient temperature ranges.

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