Diodes Incorporated’s new AP7345D family of dual Low Drop-Out (LDO) voltage regulators, which offer a high Power-Supply Rejection Ratio (PSRR) and low quiescent current, are ideal for applications powered by primary cells such as alkaline AA or AAA batteries.
The AP7345D parts feature an excellent PSRR of 75dB at 1kHz across the full output-voltage range. Quiescent current can be as low as 50μA.
The family comprises 22 devices covering a range of fixed dual-input/dual-output voltages between 1.2V and 3.6V. The LDO’s input-voltage range extends from 1.7V to 5.25V, and each of the two channels can supply up to 300mA.
Output-voltage accuracy is a guaranteed ±1.5% across the whole operating-temperature range from -40°C to 85°C. The inclusion of short-circuit protection ensures that the LDO does not sustain damage in the event of a short circuit on either of the output-voltage rails.
The wide range of output-voltage options means that the AP7345D family can be used in a variety of battery-powered applications. The addition of an LDO in the power circuit enables more of the primary cells’ voltage to be used, extending the useful lifetime between battery changes. In addition, choosing an LDO with high PSRR ensures a steady and regulated voltage is supplied to sensitive integrated circuits.
The AP7345D is supplied in an X2-DFN1612-8 package, providing a small PCB footprint and helping the system designer to achieve high power density.
AP7345D: Dual 300mA outputs