Diodes Incorporated AP7341D-22FS4-7

Overview

AP7341D-22FS4-7 from Diodes Incorporated is a 300mA, 2.2V fixed-output low-dropout linear regulator in X2-DFN1010-4 package, featuring ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply and portable media applications requiring stable, low-noise bias.

For engineers reviewing the AP7341D-22FS4-7 datasheet, AP7341D-22FS4-7 pinout, AP7341D-22FS4-7 application, or AP7341D-22FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (0.21–0.27V for 2.8V≤V_OUT≤3.3V; extrapolated ~0.24V at 2.2V), enable threshold compatibility (V_EN(H) ≥1.3V), thermal pad grounding practice, and discharge functionality ('D' suffix denotes built-in output auto-discharge).

Technical Context

The AP7341D-22FS4-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable control. Its architecture delivers fast load transient response (<100µs settling) and maintains stability with 1µF ceramic output capacitance due to internal compensation.

It operates across 1.7V–5.25V input range while delivering 2.2V at up to 300mA, with dropout voltage as low as 0.24V (typ.) at full load. The built-in discharge function (enabled by 'D' suffix) actively pulls V_OUT to GND when EN = low, eliminating hold-up voltage in power sequencing-critical systems.

Key Specifications

Pinout & Package

X2-DFN1010-4 package: 1.0mm × 1.0mm footprint, 0.4mm height, thermal pad on bottom (must be connected to PCB ground plane for thermal performance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2202E/TO and XC6210B222MR-G, the AP7341D-22FS4-7 uniquely combines 300mA drive, 35µA I_Q, active enable, and integrated discharge in a 1.0mm² DFN - making it optimal for compact, battery-powered RF and imaging subsystems demanding both efficiency and precise power sequencing.

Availability

AP7341D-22FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP supplies, wireless adapter core logic, and portable media player audio codecs requiring stable component supply with consistent parametric performance across temperature and volume production.

Supply support for AP7341D-22FS4-7 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 centers in Asia, Europe, and the US, serving automotive, industrial, computing, and consumer markets.

The AP7341 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics - emphasizing minimal footprint, fast transient response, and seamless integration into battery-powered RF and imaging subsystems.

FAQ

What is the purpose of the thermal pad on the AP7341D-22FS4-7 package?

The exposed thermal pad on the X2-DFN1010-4 package must be soldered to a dedicated PCB copper area connected to GND. This provides the primary thermal conduction path, lowering junction-to-board thermal resistance by ~60°C/W versus pad isolation. Proper implementation ensures safe operation at 300mA continuous load across −40°C to +85°C ambient.

Does the 'D' in AP7341D-22FS4-7 indicate a different electrical specification than non-D variants?

Yes - the 'D' suffix denotes integrated output auto-discharge functionality. When EN = low, an internal 30Ω N-channel MOSFET connects VOUT to GND, discharging external capacitors within tens of microseconds. Non-D versions lack this feature and require external discharge circuits for controlled power-down sequences.

Can AP7341D-22FS4-7 operate with input voltage below 2.2V?

No - the minimum input voltage is 1.7V, but functional regulation requires VIN ≥ VOUT + dropout voltage. At 300mA, dropout is ~0.24V, so VIN must be ≥2.44V for stable 2.2V output. Below that, output collapses; operation at 2.2V input is only possible at very light loads (<10mA) per dropout curves in DS36523 Rev. 5-2 Figure 6.

Is AP7341D-22FS4-7 compliant with RoHS and halogen-free standards?

Yes - it is fully RoHS 2 (2011/65/EU) compliant with no purposely added lead, and certified halogen- and antimony-free ("Green"): Br & Cl <900ppm each (total Br+Cl <1500ppm), Sb <1000ppm, verified per Diodes Incorporated's quality documentation and material declarations.