High Current, High Accuracy LDO from Diodes Incorporated Addresses Noise-Sensitive Power Conversion Applications

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Diodes Incorporated (Diodes) (Nasdaq: DIOD) has released a 3A-rated low-dropout (LDO) voltage regulator supporting 4.4µVRMSoperation (at 0.8V output).Delivering a clean supply, the AP7179D is highly optimized for powering noise-sensitive components – such as the high-performance SerDes, RF components, and data converters needed for high-speed communications, test and measurement, medical, and video applications. Remote radio units (RRUs), outdoor backhaul units, mMIMO active antenna systems, ultrasound scanners, radar systems, and lab/field instrumentation are among the types of hardware into which it can be incorporated.

The AP7179D has a ±1% output accuracyacrossline, load, and temperature. This device’s180mV (maximum) dropout voltage at a 3Aload current supports awide voltage conversion range.Itslow-noise reference and error amplifier enables a minimal noise floor.In addition,its 40dBpower supply rejection ratio (PSRR) at500kHzsubstantially lowersthe coupling of input supply noise to the output.

There are two output voltage selection modesfor this LDO:pin-programmable between 0.8V and 3.95V, or adjustable using an external resistor divider from 0.8V to 5.5V. The resulting flexibility significantly reduces the number of accompanying components needed.

The device’s low output noise mitigatesboth power-supply-generated phase noise and clock jitter. Because of this, alongside its high-current capabilities, this device is compatible with high-performance processors, such as FPGAs, ASICs, and DSPs.

The AP7179Dis housed in a compact 20-pin W-QFN3535 (Type A1) package, and it is available at$0.70in 1,000 unit quantities.

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