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

Diodes Incorporated AP7340-25FS4-7

Name: AP7340-25FS4-7
Brand: Diodes Incorporated
SKU: AP7340-25FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340-25FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-25FS4-7.pdf

Description:: IC REG LINEAR 2.5V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7340-25FS4-7 from Diodes Incorporated is a fixed-output 2.5V, 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 and portable media player power rails.

For engineers reviewing the AP7340-25FS4-7 datasheet, AP7340-25FS4-7 pinout, AP7340-25FS4-7 application, or AP7340-25FS4-7 equivalent, key selection criteria include dropout voltage (210mV at 150mA for 2.5V output), 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 AP7340-25FS4-7 integrates a precision voltage reference, error amplifier, and current-limit circuit within a CMOS-based LDO architecture. Its non-discharge design maintains output isolation during shutdown, and internal resistor network fixes V_OUT at 2.5V without external feedback components.

It delivers fast load transient response due to low output impedance and supports stable operation with minimal 0.47µF input/output ceramic capacitors. The enable input accepts standard logic-level signals (0–0.5V for disable, 1.3–5.25V for enable) and exhibits only 1µA leakage in both states.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±1% over -40°C to +85°C - ensures stable core voltage for 2.5V logic and analog circuits.
Max Output Current	150mA continuous - sufficient for baseband processors, camera sensors, and RF front-end biasing.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in mixed-signal PCBs.
Output Noise	60µV_RMS (10Hz–100kHz) - preserves signal integrity in audio codecs and ADC reference supplies.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby modes of portable devices.
Dropout Voltage	210mV at 150mA - enables regulation from 2.71V input, compatible with single-cell Li-ion (2.7–4.2V) systems.
Input Voltage Range	1.7V to 5.25V - supports direct connection to USB VBUS, boost converter outputs, or multi-cell battery rails.

Pinout & Package

The AP7340-25FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad (non-functional as GND electrode), optimized for high-density portable PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated Power Output	Delivers clean 2.5V to load; requires 0.47µF ceramic capacitor placed adjacent to minimize ESR-induced instability.
GND (Pin 2)	Reference Ground	Primary return path for output current and error amplifier; must connect directly to low-impedance ground plane.
EN (Pin 3)	Enable Control Input	Active-high logic interface; drives regulator ON/OFF; must not float-tie to VIN if unused.
VIN (Pin 4)	Unregulated Input Supply	Accepts 1.7–5.25V; requires 0.47µF decoupling capacitor near pin to suppress input ripple and transients.

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Rejects noise from switching regulators, enabling clean power for sensitive RF and audio blocks.
Low Output Noise (60µV_RMS)	Minimizes jitter in clock buffers and quantization noise in 12-bit+ ADCs powered from this rail.
Ultra-Low Quiescent Current (35µA)	Reduces no-load power loss by >60% vs. legacy LDOs, critical for battery runtime in sleep-mode applications.
±1% Output Accuracy	Guarantees compliance with tight tolerance requirements of 2.5V I/O standards and precision analog references.
X2-DFN1010-4 Footprint	0.65mm² board area-enables placement under BGA packages or in narrow bezels of smartphones and wearables.

Applications

Smartphone Baseband Power

RF Transceiver Bias

Use Scenario: Supplies 2.5V to LTE/Wi-Fi baseband ICs during active data transmission and deep-sleep states.

IC Role / Device Role / Timing Role: Primary LDO for processor I/O domain, delivering regulated voltage with fast load-step response.

Use Value: 150mA capability and 210mV dropout ensure uninterrupted operation down to 2.71V battery voltage, extending usable discharge range.

Use Scenario: Powers RF power amplifier bias circuitry in 5G mmWave front-end modules.

IC Role / Device Role / Timing Role: Low-noise local supply for PA driver stages, isolated from noisy digital domains via high PSRR.

Use Value: 60µV_RMS noise prevents AM-to-PM distortion and maintains EVM < 2.5% in 256-QAM transmissions.

Portable Camera Sensor Rail

Wireless Audio Codec Supply

Use Scenario: Provides 2.5V to CMOS image sensor analog front-end and ADC reference in action cameras.

IC Role / Device Role / Timing Role: Dedicated low-noise analog supply, decoupled from digital core rails using enable sequencing.

Use Value: ±1% accuracy ensures consistent pixel gain calibration across temperature, reducing post-processing correction overhead.

Use Scenario: Powers stereo audio DAC and headphone amplifier in Bluetooth earbuds with 20-hour battery life.

IC Role / Device Role / Timing Role: Always-on LDO for audio subsystem, enabled only when codec is active to minimize idle current.

Use Value: 35µA quiescent current reduces standby drain to <1µA per channel, enabling multi-week shelf life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2502E/TO	Same 2.5V output, but SOT-23-5 package; 6µA IQ, lower 100mA rating, 65dB PSRR.	Limited to sub-100mA loads; less suitable for RF PA bias where 150mA headroom is required.	Select when ultra-low IQ dominates over output current and PSRR; avoid for high-transient RF loads.
Torex XC6219B252MR-G	2.5V fixed, 150mA, 70dB PSRR, 40µV_RMS noise, SOT-25 package; no enable pin.	Requires external enable circuitry; lacks integrated EN control for power sequencing.	Choose for cost-sensitive designs where enable functionality is unnecessary and smaller noise is prioritized.

Compared with MCP1700-2502E/TO and XC6219B252MR-G, the AP7340-25FS4-7 uniquely combines 150mA drive, 75dB PSRR, and integrated enable in a 1.0×1.0mm footprint-making it optimal for space-constrained, noise-sensitive, and sequenced-power applications.

Availability

AP7340-25FS4-7 is available at Aetrix Electronics and suitable for smartphone baseband power, RF transceiver bias, and portable camera sensor rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7340-25FS4-7 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, and industrial markets.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO portfolio, designed specifically for noise-sensitive portable electronics requiring compact, efficient, and highly accurate voltage regulation.

FAQ

What is the minimum input voltage required for AP7340-25FS4-7 to maintain regulation at full 150mA load?

The minimum input voltage is calculated as V_OUT + V_DROP = 2.5V + 0.21V = 2.71V. This value is confirmed by the Electrical Characteristics table, which specifies 210mV typical dropout at 150mA for 2.5V output. Operation below 2.71V results in unregulated output and potential system reset.

Can AP7340-25FS4-7 be used without an external enable signal?

Yes-pin 3 (EN) can be permanently tied to VIN to maintain continuous operation. The datasheet explicitly recommends this configuration when enable functionality is unused. Doing so avoids floating inputs and ensures reliable startup without additional logic circuitry.

Is the thermal pad on the X2-DFN1010-4 package electrically connected to any internal node?

No-the thermal pad is not internally connected to GND or any other node. Per the Pin Descriptions section, it should be connected to a large copper pour for thermal dissipation and may be left floating or tied to GND externally, but must not serve as the sole GND electrode function.

Does AP7340-25FS4-7 include short-circuit protection, and what is its trip threshold?

Yes-it features fold-back short-circuit protection that limits output current to approximately 55mA when VOUT is shorted to GND. This is specified in the Electrical Characteristics table under "Fold-back Short Current" and protects the device from thermal damage during fault conditions.

AP7340-25FS4-7 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):: 2.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.3V @ 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

AP7340-25FS4-7 FAQ

1.How can I place an order for AP7340-25FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-25FS4-7 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 AP7340-25FS4-7 reliable?

The price and inventory of AP7340-25FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-25FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-25FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-25FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-25FS4-7?

AP7340-25FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-25FS4-7 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 AP7340-25FS4-7?

For technical support, including AP7340-25FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-25FS4-7 requirements.

6.How does Aetrix verify that AP7340-25FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-25FS4-7 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 AP7340-25FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-25FS4-7?

All AP7340-25FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-25FS4-7, 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 AP7340-25FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-25FS4-7:

1.Submit a request within 90 days.

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

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