Diodes Incorporated AP7340-30FS4-7

Overview

AP7340-30FS4-7 from Diodes Incorporated is a 3.0V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_RMS output noise (10Hz–100kHz). Built on a CMOS process, it features enable control, ultra-low 35µA quiescent current, and operates from 1.7V to 5.25V input - optimized for RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7340-30FS4-7 datasheet, AP7340-30FS4-7 pinout, AP7340-30FS4-7 application, or AP7340-30FS4-7 equivalent, key selection criteria include dropout voltage (210mV typical at 150mA), thermal performance in X2-DFN1010-4, EN logic thresholds (0.5V_IL/1.3V_IH), and stability with 0.47µF ceramic capacitors.

Technical Context

The AP7340-30FS4-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor - enabling fast load transient response and high line/load regulation (≤0.1%/V and ≤1.0%/A). Its non-discharge architecture avoids output discharge during shutdown, preserving downstream bias conditions.

Designed for low-noise analog and RF subsystems, it delivers 3.0V output with ±1.5% accuracy over –40°C to +85°C and exhibits 30ppm/°C temperature coefficient. The enable input supports direct microcontroller GPIO control with <1.0µA leakage and defined turn-on/turn-off thresholds.

Key Specifications

Pinout & Package

The AP7340-30FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad, optimized for minimal PCB footprint and high-density layouts in space-constrained mobile applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and TPS7A0530PDBVR, the AP7340-30FS4-7 uniquely balances 75dB PSRR, 60µV_RMS noise, and 1.0mm² footprint - making it optimal for RF and imaging subsystems where noise, size, and enable control are jointly critical.

Availability

AP7340-30FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor analog rails, wireless adapter core logic, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7340-30FS4-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-performance, energy-efficient components for consumer, computing, industrial, and communications markets.

The AP7340 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive analog and RF subsystems in portable electronics - emphasizing small footprint, precision regulation, and robust transient response.

FAQ

What is the minimum input voltage required for AP7340-30FS4-7 to regulate 3.0V output at 150mA?

The minimum input voltage is determined by dropout voltage: 210mV typical at 150mA, so VIN ≥ 3.0V + 0.21V = 3.21V. Per datasheet, the device guarantees operation down to 1.7V input, but full 150mA load capability at 3.0V output requires VIN ≥ 3.21V. Below that, output current capability degrades progressively.

Can AP7340-30FS4-7 be used without an external enable signal?

Yes - tie the EN pin directly to VIN to maintain permanent enable state. This configuration bypasses shutdown control but ensures continuous regulation. Do not leave EN floating, as undefined logic levels may cause erratic output behavior or increased quiescent current.

Is a thermal pad connection required for reliable operation at 150mA?

Yes - the X2-DFN1010-4 package includes an exposed thermal pad intended for PCB copper pour connected to GND. Without thermal pad soldering and adequate copper area, junction temperature rises significantly under 150mA load, risking thermal shutdown or accelerated parametric drift beyond specifications.

Does AP7340-30FS4-7 include short-circuit protection?

Yes - internal fold-back current limiting activates when VOUT shorts to GND, clamping output current to ~55mA. This protects the device from thermal damage during fault conditions and allows safe recovery once the short is removed, without requiring external current-sense circuitry.