Diodes Incorporated AP7345D-2833RH4-7

Overview

AP7345D-2833RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 2.8V and 3.3V outputs, each rated for 300mA continuous current, ±1% output voltage accuracy over temperature, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports independent enable control per channel for power sequencing in compact portable electronics.

For engineers reviewing the AP7345D-2833RH4-7 datasheet, AP7345D-2833RH4-7 pinout, AP7345D-2833RH4-7 application, or AP7345D-2833RH4-7 equivalent, key selection criteria include dual-rail LDO stability with ultra-low noise, high PSRR under RF-sensitive loads, thermal shutdown protection at +150°C, and X2-DFN1612-8 footprint compatibility for space-constrained PCB layouts.

Technical Context

The AP7345D-2833RH4-7 integrates two independent CMOS-based LDO regulators sharing a common ground but featuring separate VIN, VOUT, and EN pins. Each channel uses an internal voltage reference, error amplifier, and current-limit circuit, enabling precise regulation without external feedback components.

It supports auto-discharge via integrated N-channel MOSFETs (30Ω on-resistance when disabled), delivers fast load transient response (<40µs recovery for 50mA→300mA step), and maintains stability with 1µF ceramic output capacitors-enabling robust performance in battery-powered RF and imaging subsystems.

Key Specifications

Pinout & Package

The AP7345D-2833RH4-7 is housed in an X2-DFN1612-8 package (1.6mm × 1.2mm, 0.4mm height) with exposed thermal pad for enhanced heat dissipation. PCB layout requires connection of the thermal pad to GND plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO applications.

Compared with XC6216D2833MR-G and RT9080L-2833, the AP7345D-2833RH4-7 uniquely combines 300mA/channel capability, 75dB PSRR, 60µV_rms noise, and integrated auto-discharge in a 1.6mm×1.2mm footprint - making it the only option meeting full RF and imaging subsystem requirements without design compromises.

Availability

AP7345D-2833RH4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias, mobile camera sensor core, and portable media player audio codec applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for AP7345D-2833RH4-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7345D belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive portable electronics where dual-rail sequencing, minimal footprint, and battery-life optimization are critical system-level priorities.

FAQ

What are the recommended input and output capacitor values for AP7345D-2833RH4-7?

A minimum 1.0µF ceramic capacitor is required between each VIN pin and GND, and between each VOUT pin and GND. These capacitors must be placed as close as possible to their respective pins to minimize trace inductance. For applications with large load transients, adding low-ESR bulk capacitance in parallel improves stability and voltage regulation. The device is optimized for ceramic capacitors and does not require specific ESR tuning.

Does AP7345D-2833RH4-7 support independent power sequencing between its two outputs?

Yes - EN1 and EN2 are fully independent active-high enable inputs, allowing precise control over turn-on and turn-off timing of each 2.8V and 3.3V rail. This enables safe sequencing such as powering the 2.8V core before enabling the 3.3V I/O domain, or shutting down non-critical rails first during low-power modes - all without external timing circuitry.

How does the thermal shutdown feature operate in AP7345D-2833RH4-7?

The device triggers thermal shutdown at +150°C and remains latched off until junction temperature falls by +20°C hysteresis. During shutdown, both outputs are disabled and quiescent current drops to ≤1.0µA. Recovery is automatic upon cooling - no external reset signal is needed. The exposed thermal pad must be soldered to a GND-connected copper area to ensure effective heat transfer and reliable thermal response.

Is the AP7345D-2833RH4-7 RoHS and halogen-free compliant?

Yes - the AP7345D-2833RH4-7 is fully RoHS 3 compliant (2015/863/EU), lead-free, and halogen- and antimony-free per Diodes Incorporated's Green standard: <900ppm bromine, <900ppm chlorine (total Br+Cl <1500ppm), and <1000ppm antimony compounds. Compliance is verified and documented in the manufacturer's material declarations.