Diodes Incorporated AP7347D-105W5-7

Overview

AP7347D-105W5-7 from Diodes Incorporated is a 500mA, 1.05V fixed-output low-dropout regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). Built on CMOS process, it features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality. It powers noise-sensitive analog rails in automotive infotainment modules requiring stable 1.05V bias for high-speed SerDes PHYs.

For engineers reviewing the AP7347D-105W5-7 datasheet, AP7347D-105W5-7 pinout, AP7347D-105W5-7 application, or AP7347D-105W5-7 equivalent, key selection criteria include dropout voltage at 500mA (0.75V max for 1.05V output), EN logic thresholds (0.5V low / 1.25V high), thermal resistance (140°C/W in SOT25), and wettable-flank compatibility for automated optical inspection.

Technical Context

The AP7347D-105W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with auto-discharge path. Its CMOS architecture enables ultra-low quiescent current (60µA typ) while maintaining fast load transient response (<200µs settling for 100mA step).

It operates across 1.7V–5.5V input range and delivers regulated 1.05V output with ±1% accuracy over -40°C to +125°C ambient. The enable pin supports active-high control with 0.01µA standby current and 1µA input leakage, and the NC pins are internally unconnected but recommended tied to GND for thermal enhancement.

Key Specifications

Pinout & Package

SOT25 (Type A1) package: 2.9mm × 2.8mm × 1.45mm body height, wettable flank leads, JEDEC MS-012 compliant. Exposed pad not present; thermal dissipation relies on copper area under pins 2 (GND) and 4 (VOUT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7347D-105W5-7, AP7361D-105W5-7 offers higher current headroom at the expense of increased dropout, while XC6210B105MR-G trades PSRR and discharge capability for lower cost-making AP7347D optimal for automotive and precision analog designs demanding both noise suppression and controlled shutdown behavior.

Availability

AP7347D-105W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor transmitters, medical wearables, and camera module designs requiring stable component supply with AEC-Q200-aligned reliability and wettable flank inspection support.

Supply support for AP7347D-105W5-7 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 ICs for automotive, industrial, computing, and consumer markets.

The AP7347D belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive automotive electronics and precision analog subsystems requiring guaranteed ±1% accuracy and fast transient response.

FAQ

What is the minimum input voltage required for AP7347D-105W5-7 to regulate 1.05V at 500mA?

The minimum input voltage is 1.8V: dropout voltage is specified at 0.75V max (typical 0.65V) at 500mA for 1.05V output, and the absolute minimum VIN is 1.7V per datasheet. Operating at 1.8V provides 0.75V headroom, ensuring regulation across temperature and process variation.

Does AP7347D-105W5-7 require an external discharge resistor?

No. The device integrates an internal 30Ω NMOS discharge path between VOUT and GND when EN is low. This discharges the output capacitor in under 10ms, eliminating need for external components and simplifying layout in space-constrained automotive modules.

Can AP7347D-105W5-7 be used in AEC-Q200 qualified designs?

The AP7347D-105W5-7 itself is not AEC-Q200 qualified; however, the automotive-grade variant AP7347DQ-105W5-7 is explicitly qualified per AEC-Q200 Rev D. For production automotive applications, AP7347DQ must be substituted-its electrical specs and pinout are identical, but it undergoes extended temperature cycling and humidity testing.

How does the NC pin affect thermal performance in SOT25 package?

Pin 5 (NC) has no internal connection but is recommended tied to GND. Doing so increases copper area under the package, lowering effective θ_JA by up to 15°C/W in typical 2-layer PCB layouts-critical for sustaining 500mA output at +85°C ambient without derating.