Diodes Incorporated AP7340D-30FS4-7

Overview

AP7340D-30FS4-7 from Diodes Incorporated is a 3.0V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_RMS output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and an integrated discharge FET - making it suitable for powering RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7340D-30FS4-7 datasheet, AP7340D-30FS4-7 pinout, AP7340D-30FS4-7 application, or AP7340D-30FS4-7 equivalent, key selection criteria include dropout voltage (210mV @ 150mA for 3.0V output), EN logic thresholds (0.5V_IL/1.3V_IH), thermal pad handling, and compatibility with 0.47µF ceramic input/output capacitors in space-constrained layouts.

Technical Context

The AP7340D-30FS4-7 employs a CMOS-based LDO architecture with a precision voltage reference, error amplifier, and current-limit circuit. Its built-in auto-discharge function actively pulls VOUT to GND when disabled (EN = low), eliminating residual voltage on downstream loads.

This device operates across 1.7V–5.25V input range and maintains regulation down to 210mV dropout at full 150mA load for 3.0V output. It delivers stable performance over –40°C to +85°C ambient, with ±30ppm/°C output voltage temperature coefficient and guaranteed 150mA output current under all specified conditions.

Key Specifications

Pinout & Package

The AP7340D-30FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad (non-electrical, recommended tied to GND plane). Its ultra-compact footprint supports high-density mobile PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/TT and XC6210B302MR-G, the AP7340D-30FS4-7 uniquely integrates both enable control and active discharge in a 1.0mm×1.0mm DFN, offering superior power sequencing control and smallest PCB area - critical for multi-rail mobile SoC interfaces.

Availability

AP7340D-30FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, wireless adapter baseband regulation, and portable media player audio codec applications requiring stable component supply, tight voltage tolerance, and ultra-small footprint.

Supply support for AP7340D-30FS4-7 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 for consumer, computing, communications, industrial, and automotive markets.

The AP7340 series belongs to Diodes' high-performance LDO portfolio, designed specifically for space-constrained, battery-powered portable electronics demanding low noise, high PSRR, and intelligent power control.

FAQ

What is the purpose of the thermal pad on the AP7340D-30FS4-7 package?

The exposed thermal pad on the X2-DFN1010-4 package is non-electrical and serves solely for heat dissipation. Diodes Incorporated recommends connecting it to a large copper area tied to GND on the PCB to improve thermal resistance and sustain 150mA output current at elevated ambient temperatures. It must not be used as a functional GND electrode.

Does the AP7340D-30FS4-7 require external capacitors, and what values are recommended?

Yes - the AP7340D-30FS4-7 requires both input (CIN) and output (COUT) ceramic capacitors. A minimum 0.47µF capacitor is recommended for both pins, placed as close as possible to the device. Low-ESR ceramics are mandatory for stability; bulk capacitance may be added in parallel for high-transient loads, but the 0.47µF ceramic must remain adjacent to the IC.

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

The auto-discharge FET activates only when the EN pin is driven low (≤0.5V), pulling VOUT to GND through a typical 30Ω path. It remains inactive during normal operation (EN high) and does not affect regulation. This feature eliminates hold-up voltage on downstream loads, enabling precise power sequencing in multi-rail systems without external components.

Can the AP7340D-30FS4-7 be used with input voltages below 1.7V?

No - the absolute minimum input voltage is 1.7V per the Recommended Operating Conditions. Operation below this threshold risks loss of regulation, increased dropout, or undefined behavior. For sub-1.7V applications, consider alternative LDOs rated for lower VIN, such as the AP2204 (1.0V min), but verify compatibility with 3.0V output requirements.