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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP7340-23FS4-7

Name: AP7340-23FS4-7
Brand: Diodes Incorporated
SKU: AP7340-23FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340-23FS4-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-23FS4-7.pdf

Description:: IC REG LINEAR 2.3V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7340-23FS4-7 from Diodes Incorporated is a 2.3V fixed-output, 150mA 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 player power rails.

For engineers reviewing the AP7340-23FS4-7 datasheet, AP7340-23FS4-7 pinout, AP7340-23FS4-7 application, or AP7340-23FS4-7 equivalent, key selection criteria include dropout voltage (0.21–0.27V @150mA), enable threshold compatibility (V_EN(H) ≥1.3V), thermal performance on 0.4mm² DFN footprint, and ceramic capacitor stability with 0.47µF C_IN/C_OUT.

Technical Context

The AP7340-23FS4-7 integrates a CMOS-based error amplifier, precision voltage reference, and current-limit circuit within a single-die architecture. Its non-discharge configuration avoids automatic V_OUT discharge during shutdown, preserving downstream capacitance charge state.

It operates across 1.7V–5.25V input range with guaranteed 150mA output current and maintains regulation down to 2.3V ±1% over –40°C to +85°C ambient. Line regulation is ≤0.1%/V and load regulation ≤1.0%/A, enabling stable biasing of noise-sensitive analog blocks.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.3V ±1% at TA = +25°C; ±1.5% over full temperature range - ensures precise bias for 2.3V I/O domains or RF front-end LNA stages.
Max Output Current	150mA continuous - sufficient to power baseband processors, camera ISPs, or dual-band wireless adapters without external pass devices.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails in compact handheld PCBs.
Output Noise	60µV_RMS (10Hz–100kHz) - meets low-noise requirements for audio codecs, ADC reference supplies, and RF synthesizer VCOs.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes or standby modes of portable video players.
Dropout Voltage	0.21–0.27V @150mA (for V_OUT = 2.3V) - enables operation from single-cell Li-ion (3.0V min) or 2.5V system rails with margin.
Enable Threshold	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting; prevents floating-state misoperation.

Pinout & Package

X2-DFN1010-4 package: 1.0mm × 1.0mm × 0.39mm body, 0.65mm pitch, exposed thermal pad (non-functional GND connection recommended).

Pin/Terminal	Circuit Role	Design Meaning
PIN1 - VOUT	Regulated power output	Delivers clean 2.3V to load; requires low-impedance path to local 0.47µF ceramic capacitor and ground plane.
PIN2 - GND	Power ground reference	Primary return path for output current; must connect directly to solid ground plane to minimize noise coupling.
PIN3 - EN	Active-high enable control	Drives regulator ON/OFF; must be terminated to VIN or MCU GPIO - never left floating per functional reliability requirement.
PIN4 - VIN	Unregulated input supply	Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling placed <1mm from pin to suppress high-frequency ripple.

Key Features

Feature	Design Value
High PSRR (75dB @1kHz)	Rejects ripple from noisy switchers in multi-rail PMIC systems, eliminating need for additional LC filtering stages.
Ultra-low output noise (60µV_RMS)	Enables direct powering of RF VCOs and high-resolution SAR ADCs without dedicated low-noise post-regulation.
Low quiescent current (35µA)	Reduces standby power loss in battery-powered devices with frequent sleep/wake cycles, e.g., Bluetooth LE peripherals.
Small X2-DFN1010-4 footprint	Minimizes PCB area in space-constrained designs like smartwatches and ultra-thin tablets - 1.0mm × 1.0mm total real estate.
±1% output accuracy	Ensures consistent timing margin and signal integrity in 2.3V I/O interfaces without calibration overhead.

Applications

Smartphone Baseband Power

RF Front-End Bias

Use Scenario: Supplies 2.3V to baseband processor I/O banks and memory interfaces in LTE smartphones.

IC Role / Device Role / Timing Role: Primary low-noise LDO delivering regulated core I/O voltage with fast transient response to burst-mode data transfers.

Use Value: Maintains signal integrity during high-speed DDR interface toggling by suppressing supply-induced jitter below 1ps RMS.

Use Scenario: Powers low-noise amplifier (LNA) and mixer bias circuits in sub-6GHz 5G RF modules.

IC Role / Device Role / Timing Role: Clean analog supply rail isolating sensitive RF signal paths from digital switching noise.

Use Value: Achieves >30dB improvement in receiver NF compared to unfiltered DC/DC output due to 75dB PSRR and 60µV_RMS noise.

Portable Media Player Audio

Camera Image Signal Processor

Use Scenario: Provides 2.3V reference supply to stereo DAC and headphone amplifier in portable music players.

IC Role / Device Role / Timing Role: Low-noise voltage source for audio signal chain biasing and reference generation.

Use Value: Enables THD+N < –105dB by eliminating supply-induced harmonic distortion in Class AB output stages.

Use Scenario: Powers ISP core logic and analog front-end in smartphone dual-camera modules.

IC Role / Device Role / Timing Role: Stable domain regulator supporting high-speed MIPI CSI-2 clock and data lanes.

Use Value: Prevents frame corruption and rolling shutter artifacts caused by supply droop during auto-exposure bursts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2302E/TO	2.3V fixed, 250mA, SOT-23-5 package, 6µA IQ, but only 60dB PSRR @1kHz and 120µV_RMS noise.	Larger footprint, lower noise rejection - suitable for cost-sensitive non-RF applications where size is secondary.	Select when board space allows SOT-23 and RF noise immunity is not required.
Torex XC6210B232MR-G	2.3V fixed, 150mA, XDFN-4 package, 25µA IQ, 70dB PSRR @1kHz, 45µV_RMS noise - slightly better noise but no enable pin.	No EN control limits use in power-gated subsystems; requires external MOSFET for sequencing.	Choose only if enable functionality is unnecessary and lowest possible IQ is critical.

Compared with MCP1700-2302E/TO and XC6210B232MR-G, the AP7340-23FS4-7 uniquely balances ultra-small footprint, integrated enable, 75dB PSRR, and 60µV_RMS noise - making it optimal for RF-critical, space-constrained portable designs requiring active power management.

Availability

AP7340-23FS4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF front-end bias, portable media player audio, and camera image signal processor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7340-23FS4-7 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-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO portfolio, engineered specifically for noise-sensitive portable electronics where small size, low IQ, and clean output voltage are mandatory design constraints.

FAQ

What is the minimum input voltage required for AP7340-23FS4-7 to maintain regulation at 150mA load?

The minimum input voltage is calculated as V_OUT + V_DROP = 2.3V + 0.27V = 2.57V under worst-case conditions (TA = +85°C, 150mA). At room temperature, dropout is typically 0.21V, allowing operation down to 2.51V. Input must remain ≥1.7V per absolute rating, but regulation fails below the dropout threshold.

Can AP7340-23FS4-7 be used with tantalum output capacitors?

No - the AP7340-23FS4-7 is optimized for ceramic capacitors with ESR <100mΩ. Tantalum capacitors typically exhibit higher ESR (300–1000mΩ) and risk instability or oscillation. The datasheet explicitly recommends 0.47µF X5R/X7R ceramics placed within 1mm of VOUT/GND pins.

Does AP7340-23FS4-7 include short-circuit protection?

Yes - it features fold-back current limiting that clamps output current to ~55mA when VOUT is shorted to GND. This protects the device from thermal damage during fault conditions while maintaining safe junction temperature per its 400mW power dissipation rating on JEDEC High-K board.

Is the thermal pad on X2-DFN1010-4 electrically connected internally?

No - the thermal pad is not bonded to any internal die node. Per datasheet layout guidance, it should be connected to PCB ground plane via multiple vias for thermal conduction, but must not serve as the sole GND electrode; PIN2 remains the functional ground terminal.

AP7340-23FS4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-XDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.25V

Voltage - Output (Min/Fixed):: 2.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.36V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: 100 µA

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1010-4

AP7340-23FS4-7 FAQ

1.How can I place an order for AP7340-23FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-23FS4-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AP7340-23FS4-7 reliable?

The price and inventory of AP7340-23FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-23FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-23FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-23FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-23FS4-7?

AP7340-23FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-23FS4-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AP7340-23FS4-7?

For technical support, including AP7340-23FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-23FS4-7 requirements.

6.How does Aetrix verify that AP7340-23FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-23FS4-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP7340-23FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-23FS4-7?

All AP7340-23FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-23FS4-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AP7340-23FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-23FS4-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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