Diodes Incorporated AP7361-FGE-7

Overview

AP7361-FGE-7 from Diodes Incorporated is a 1A ultra-low dropout linear regulator with adjustable/fixed output voltage, enable control, and thermal shutdown protection. It operates from 2.2V–6V input, delivers ≤±1% output accuracy at 100mA, and achieves 150mV dropout at 300mA in U-DFN3030-8 package-ideal for FPGA I/O power, portable audio systems, and battery-powered IoT nodes.

For engineers reviewing the AP7361-FGE-7 datasheet, AP7361-FGE-7 pinout, AP7361-FGE-7 application, or AP7361-FGE-7 equivalent, key selection criteria include its 70µA quiescent current, 0.8V internal reference, ceramic-capacitor stability (≥2.2µF), and EN pin logic-high activation-critical for low-power sequencing and thermal-limited PCB layouts.

Technical Context

The AP7361-FGE-7 integrates a PMOS pass element, band-gap reference, and error amplifier to maintain regulation across -40°C to +85°C ambient. Its fixed-output variant (FGE suffix) uses internal resistor divider tied to 0.8V reference, eliminating external ADJ components while retaining full current-limit (1.1–1.5A) and thermal-shutdown (150°C/130°C hysteresis) functionality.

Unlike SOT223/TO252 variants, the U-DFN3030-8 package enables compact layout with exposed thermal pad (θ_JA = 70°C/W), supporting high-current operation without heatsinks. The EN pin directly controls gate driver biasing-no pull-up required-and exhibits <0.01µA leakage at 6V, ensuring minimal standby loss in always-on subsystems.

Key Specifications

Pinout & Package

AP7361-FGE-7 uses the U-DFN3030-8 (3mm × 3mm, 0.5mm pitch) package with wettable flank leads and exposed thermal pad on underside for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TLS850F0TESA1, AP7361-FGE-7 uniquely balances 1A output, 70µA IQ, EN control, and U-DFN3030-8 compactness-making it optimal for space-constrained, battery-sensitive industrial and medical edge devices where full-feature integration matters more than automotive qualification or legacy SOIC compatibility.

Availability

AP7361-FGE-7 is available at Aetrix Electronics and suitable for FPGA power delivery, portable audio systems, industrial sensor nodes, and medical wearables requiring stable component supply across long production lifecycles.

Supply support for AP7361-FGE-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 ICs for power management, signal integrity, and connectivity applications.

The AP7361 belongs to Diodes' high-performance LDO family designed for low-noise, low-quiescent-current power delivery in portable, industrial, and computing systems where thermal efficiency and small-footprint regulation are critical.

FAQ

What is the minimum output capacitor value required for stability with AP7361-FGE-7?

The AP7361-FGE-7 requires a minimum 2.2µF ceramic output capacitor with ESR between 10mΩ and 300mΩ for guaranteed stability. Lower ESR values improve transient response but may require additional damping; larger capacitors (e.g., 4.7µF–10µF) further reduce undershoot during load steps without compromising stability.

Can AP7361-FGE-7 be used in adjustable-output configurations?

No-AP7361-FGE-7 is a fixed-output variant with internal resistor divider set to a specific voltage (e.g., 1.0V, 1.2V, etc., per ordering code). Adjustable operation is only supported in AP7361-XXY-13 (SOT89-5) and AP7361-XXSP-13 (SO-8EP) packages, which expose the ADJ pin for external feedback.

How does the EN pin behave during power-up and what voltage thresholds apply?

The EN pin activates the regulator when driven to ≥1.0V (VIH) and disables it below 0.3V (VIL). It draws <0.01µA leakage at 6V, allowing direct connection to microcontroller GPIO without level-shifting. No external pull-up is needed-tying EN to IN ensures default-on operation after input stabilization.

What thermal derating applies to AP7361-FGE-7 at 85°C ambient temperature?

At TA = +85°C, the U-DFN3030-8 package's θ_JA = 70°C/W limits usable power dissipation to ~0.93W before reaching TJ = 150°C. For a 3.3V output from 5V input (1.7V drop), maximum sustainable current is ~550mA-requiring careful thermal pad layout and airflow consideration in enclosed designs.