Diodes Incorporated AP7347DQ-115FDZW-7

Overview

AP7347DQ-115FDZW-7 from Diodes Incorporated is an automotive-grade 500mA low-dropout linear regulator with fixed 1.15V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 60µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality - designed for noise-sensitive power rails in ADAS camera modules and infotainment domain controllers.

For engineers reviewing the AP7347DQ-115FDZW-7 datasheet, AP7347DQ-115FDZW-7 pinout, AP7347DQ-115FDZW-7 application, or AP7347DQ-115FDZW-7 equivalent, key selection criteria include AEC-Q100 qualification, WDFN2020-6 wettable flank package thermal performance (θ_JA = 54°C/W), dropout voltage ≤320mV at 500mA (for V_OUT = 1.15V), and EN logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.25V).

Technical Context

The AP7347DQ-115FDZW-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with auto-discharge path. Its internal resistor network fixes V_OUT at 1.15V without external feedback components.

It operates across 1.7V–5.5V input range, supports –40°C to +125°C ambient operation, and delivers stable regulation under fast load transients (e.g., 50mA ↔ 500mA steps) due to optimized loop compensation and low-output-impedance design. The EN pin enables precise system-level power sequencing with <1µA standby current.

Key Specifications

Pinout & Package

AP7347DQ-115FDZW-7 uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm, 0.75mm height), optimized for automated optical inspection (AOI) and high-density automotive PCB layouts. Exposed pad (EP) must be connected to GND for thermal dissipation (θ_JC = 20°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B115MR-G and RT9080AL-115GJ6F, AP7347DQ-115FDZW-7 uniquely combines AEC-Q100 Grade 1, wettable flank packaging, 75dB PSRR, and integrated auto-discharge - making it the only drop-in solution for safety-critical ADAS and V2X power domains requiring full automotive traceability and reliability.

Availability

AP7347DQ-115FDZW-7 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment domain controllers, and wireless V2X communication systems requiring stable component supply, full AEC-Q100 documentation, and IATF 16949 traceability.

Supply support for AP7347DQ-115FDZW-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-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically to replace legacy bipolar LDOs in noise-sensitive, thermally constrained automotive subsystems while meeting PPAP and change-control requirements.

FAQ

What is the maximum allowable input voltage for AP7347DQ-115FDZW-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.5V. Operation above 5.5V risks permanent damage even for brief transients. For 1.15V output, minimum functional VIN is 1.47V (accounting for worst-case 320mV dropout at 500mA), and typical use cases employ 2.5V, 3.3V, or 5.0V inputs.

Does AP7347DQ-115FDZW-7 require an external output capacitor, and what type is recommended?

Yes - a minimum 1.0µF X5R/X7R ceramic capacitor is required between VOUT and GND, placed within 2mm of the pins. Low-ESR ceramics ensure stability and optimal transient response; bulk tantalum or polymer caps may be added in parallel for high-slew-rate loads. Avoid electrolytics due to ESR and temperature limitations.

How does the auto-discharge feature operate, and when is it active?

The auto-discharge NMOS (R_ON ≈ 30Ω) connects VOUT to GND only when EN = low (shutdown mode). It actively discharges residual charge on C_OUT, reducing VOUT to <100mV within ~100µs. This prevents latch-up in downstream circuits and satisfies ISO 16750-2 leakage current requirements during vehicle sleep states.

Is thermal derating required for AP7347DQ-115FDZW-7 in a 60°C ambient environment?

Yes - with θ_JA = 54°C/W and T_J(MAX) = 150°C, max allowable power dissipation at 60°C ambient is (150 – 60)/54 ≈ 1.67W. At 500mA and 320mV dropout, P_D = 0.16W - well within limit. However, PCB copper area under EP must be ≥40mm² (per Diodes layout guide) to maintain θ_JA spec; insufficient copper raises effective θ_JA and triggers earlier thermal shutdown.