Diodes Incorporated AP7315Q-27W5-7

Overview

AP7315Q-27W5-7 from Diodes Incorporated is an automotive-grade 150mA low-dropout linear regulator with fixed 2.7V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, operates from 1.7V to 5.25V input, and is qualified to AEC-Q100 Grade 1 for use in ADAS camera power rails and infotainment domain controllers.

For engineers reviewing the AP7315Q-27W5-7 datasheet, AP7315Q-27W5-7 pinout, AP7315Q-27W5-7 application, or AP7315Q-27W5-7 equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and confirmed alternative LDOs with documented functional differences.

Technical Context

The AP7315Q-27W5-7 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and N-channel pass transistor. Its enable logic requires EN ≥1.3V to activate regulation and EN ≤0.5V to enter shutdown mode with 0.01µA standby current.

It achieves stable operation with 0.47µF ceramic input/output capacitors, supports 150mA continuous load with dropout as low as 0.29V at 2.8V–3.3V V_OUT, and maintains ±30ppm/°C output voltage temperature coefficient across –40°C to +125°C ambient.

Key Specifications

Pinout & Package

SOT25 (5-pin small-outline transistor) package with matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, and 0.016g mass. Pin 4 is NC (no connection); all other pins are electrically active and require proper PCB layout per Diodes' recommended pad dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7315Q-27W5-7, the -13 variant provides identical performance with logistics optimization for volume production, while TLV73327PDBVR trades Grade 1 qualification for slightly lower noise and higher current-making it unsuitable for safety-critical ADAS but viable for infotainment audio rails.

Availability

AP7315Q-27W5-7 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment domain controllers, and telematics RF subsystems requiring stable component supply with full AEC-Q100 traceability and PPAP support.

Supply support for AP7315Q-27W5-7 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, with design centers across Asia, Europe, and the US, and ISO/TS 16949-certified wafer fabs and assembly facilities.

The AP7315Q belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive power domains in ADAS, body electronics, and infotainment systems demanding AEC-Q100 Grade 1 reliability and PPAP-ready documentation.

FAQ

What is the minimum input voltage required for AP7315Q-27W5-7 to maintain regulation at full 150mA load?

The minimum input voltage is calculated as V_OUT + V_DROP = 2.7V + 0.29V = 2.99V. At 150mA load and +25°C, the device sustains regulation down to 2.99V input; at higher temperatures or worst-case process corners, the dropout may reach 0.32V, requiring ≥3.02V input for guaranteed operation.

Can the EN pin be left unconnected if enable functionality is not needed?

No. The EN pin must never be left floating. If enable control is unused, tie EN directly to VIN to ensure permanent activation. Floating EN risks partial turn-on, increased quiescent current, or erratic output behavior due to noise coupling on the high-impedance input node.

Does AP7315Q-27W5-7 include output discharge functionality?

No. The "Q" suffix without "D" indicates the non-discharge variant. When disabled via EN, the output remains high-impedance and retains its voltage until external leakage paths discharge it. For active discharge, select AP7315DQ-27W5-7, which integrates a 30Ω pull-down FET between VOUT and GND.

Is a bypass capacitor required on the VREF or FB pin for AP7315Q-27W5-7?

No. AP7315Q-27W5-7 uses an internal fixed-voltage reference and has no external feedback or reference pins. Only input (VIN–GND) and output (VOUT–GND) ceramic capacitors are required-0.47µF each, placed as close as possible to their respective pins per the layout guidelines in DS41596 Rev. 3-2.