Diodes Incorporated AP7343Q-11W5-7

Overview

AP7343Q-11W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 1.1V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, and short-circuit protection, and is deployed in noise-sensitive ADAS camera power rails and infotainment domain controllers.

For engineers reviewing the AP7343Q-11W5-7 datasheet, AP7343Q-11W5-7 pinout, AP7343Q-11W5-7 application, or AP7343Q-11W5-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θ_JA = 179°C/W), low-noise operation under 300mA load, and compatibility with 1µF ceramic input/output capacitors.

Technical Context

The AP7343Q-11W5-7 uses a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input provides precise on/off control with defined logic thresholds (V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V) and sub-1µA leakage.

It delivers stable 1.1V output across -40°C to +125°C ambient, supports input voltages from 1.7V to 5.25V, and maintains <30mV load regulation (1mA–300mA) and 0.02%/V line regulation - critical for automotive POL applications where supply rail ripple and thermal drift must be tightly constrained.

Key Specifications

Pinout & Package

AP7343Q-11W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for thermal dissipation in space-constrained automotive PCBs. The exposed pad is not electrically connected but must be tied to GND via large copper area for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B112MR-G and RT9080AL-11PUF, the AP7343Q-11W5-7 uniquely combines AEC-Q100 Grade 1 compliance, 75dB PSRR, and 35µA I_Q in a thermally robust SOT25 package - making it the only qualified choice for safety-critical 1.1V POL in ADAS and infotainment ECUs.

Availability

AP7343Q-11W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and wireless communication gateways requiring stable component supply with full AEC-Q100 traceability and PPAP documentation support.

Supply support for AP7343Q-11W5-7 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 company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and test facilities certified to IATF 16949 for automotive-grade products.

The AP7343Q belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive point-of-load applications in ADAS, infotainment, and body electronics where precision, reliability, and thermal resilience are mandatory.

FAQ

What is the maximum input voltage rating for AP7343Q-11W5-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V risks violating the specified dropout and thermal limits, especially at high ambient temperatures. Operation above 5.25V is not guaranteed and may trigger thermal shutdown or degrade long-term reliability.

Does AP7343Q-11W5-7 include output discharge functionality?

No. The "Q" suffix and "W5" package code indicate the non-discharge variant. Unlike the AP7343DQ series, this part lacks an internal discharge FET; VOUT remains floating after EN is pulled low. External discharge circuitry is required if rapid output voltage decay is needed for system sequencing.

Can AP7343Q-11W5-7 operate with ceramic output capacitors smaller than 1µF?

The datasheet specifies stability with ≥1µF ceramic output capacitance. Using smaller values (e.g., 0.47µF) may cause instability or excessive overshoot during load transients, particularly at 300mA step changes. Layout parasitics and capacitor ESR also affect margin - 1µF is the validated minimum for all operating conditions.

How is thermal performance affected by the NC pin connection in SOT25?

The NC pin (Pin 5) is not electrically active but serves as a thermal relief path. Tying it to GND expands the effective copper area for heat conduction from the die to the PCB ground plane, reducing θ_JA by up to 15°C/W in standard JEDEC High-K board conditions. Leaving it unconnected degrades thermal performance and increases junction temperature under load.