Diodes Incorporated AP7343Q-11FDZW-7

Overview

AP7343Q-11FDZW-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive-compliant 300mA low-dropout regulator with fixed 1.1V output, ±1% accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports -40°C to +125°C ambient, targeting noise-sensitive power domains in ADAS cameras and infotainment RF supplies.

For engineers reviewing the AP7343Q-11FDZW-7 datasheet, AP7343Q-11FDZW-7 pinout, AP7343Q-11FDZW-7 application, or AP7343Q-11FDZW-7 equivalent, key selection criteria include its 35µA quiescent current, thermal shutdown at +150°C, SOT25/W-DFN2020-6 package options, enable-controlled sequencing, and automotive PPAP capability.

Technical Context

The AP7343Q-11FDZW-7 integrates a CMOS-based LDO architecture with voltage reference, error amplifier, current limit, and thermal shutdown circuitry. Its EN pin provides precise on/off control with 0–0.5V low threshold and 1.3–5.25V high threshold, enabling robust power sequencing in automotive subsystems.

It delivers stable 1.1V output across 0–300mA load with dropout as low as 0.46V at 300mA (for 1.0V < V_OUT ≤ 1.2V), and achieves 75dB ripple rejection at 1kHz while maintaining 60µV_rms integrated noise-critical for powering RF receivers and image sensors where supply-induced jitter degrades SNR.

Key Specifications

Pinout & Package

AP7343Q-11FDZW-7 is packaged in W-DFN2020-6 (SWP) Type A1-a 2.0mm × 2.0mm, 0.65mm pitch, wettable flank package with exposed thermal pad. This footprint enables high-density PCB layout and efficient heat dissipation in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7343Q-11FDZW-7, AP7361Q-11W5-7 offers higher current headroom at the expense of quiescent current and board area, while TLD1113-11ES sacrifices noise and PSRR performance for broader automotive availability-making the AP7343Q optimal for noise-critical ADAS and infotainment POLs.

Availability

AP7343Q-11FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment power supplies, ADAS camera modules, and RF communication subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AP7343Q-11FDZW-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and consumer markets.

The AP7343Q belongs to Diodes' automotive-grade LDO portfolio, engineered specifically for noise-sensitive, high-reliability power domains in ADAS, infotainment, and telematics systems.

FAQ

What is the minimum input voltage required for AP7343Q-11FDZW-7 to regulate 1.1V output at 300mA?

The minimum input voltage is 1.56V, derived from the maximum dropout voltage of 0.46V at 300mA for 1.0V < V_OUT ≤ 1.2V. This ensures regulation even with degraded 12V battery systems operating near 9V, critical for cold-cranking scenarios in automotive applications.

Can the NC pins on the W-DFN2020-6 (Type A1) package be left floating?

No-pins 2 and 5 are designated NC but must be connected to GND on the PCB. This practice maximizes thermal dissipation through the PCB copper and improves mechanical reliability of the solder joints, as specified in Diodes' layout guidelines for the FDZW package.

Does AP7343Q-11FDZW-7 include output discharge functionality?

No-AP7343Q-11FDZW-7 is the non-discharge variant. The "Q" suffix indicates automotive compliance without internal discharge FET; output voltage decays only through external load. For active discharge, select AP7343DQ-11FDZW-7, which adds a 30Ω pull-down path when disabled.

How does the exposed pad (EP) affect thermal performance in AP7343Q-11FDZW-7?

The EP reduces thermal resistance from junction to ambient to 54°C/W when soldered to ≥100mm² GND copper area. Leaving it unconnected raises θ_JA to >120°C/W, risking thermal shutdown above 150mW dissipation-so proper EP grounding is mandatory for full 300mA operation at +125°C ambient.