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

Diodes Incorporated AP7340-22FS4-7

Name: AP7340-22FS4-7
Brand: Diodes Incorporated
SKU: AP7340-22FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340-22FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-22FS4-7.pdf

Description:: IC REG LINEAR 2.2V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7340-22FS4-7 from Diodes Incorporated is a 2.2V 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 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 AP7340-22FS4-7 datasheet, AP7340-22FS4-7 pinout, AP7340-22FS4-7 application, or AP7340-22FS4-7 equivalent, key selection criteria include dropout voltage (0.21–0.27V @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 AP7340-22FS4-7 integrates a precision voltage reference, error amplifier, and current-limit circuit in a single CMOS LDO architecture. Its fixed 2.2V output is set by an internal resistor network, eliminating external feedback components.

Enable functionality is implemented via a dedicated CMOS-compatible EN pin (pin 3) with defined logic thresholds and sub-1µA leakage. The device lacks auto-discharge (non-D variant), making it suitable for systems where output hold-up during shutdown is required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.2V ±1% (25°C), ±1.5% (−40°C to +85°C) - ensures stable core bias for RF ICs and camera sensors.
Max Output Current	150mA guaranteed - supports moderate-power analog blocks without thermal derating in X2-DFN1010-4.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_RMS (10Hz–100kHz) - preserves signal integrity in low-noise analog front-ends like audio codecs or RF receivers.
Quiescent Current	35µA typical - extends battery life in always-on subsystems such as Bluetooth LE or sensor hubs.
Dropout Voltage	0.21–0.27V @150mA - enables operation down to 2.41V input, critical for single-cell Li-ion (2.7–4.2V) applications.
Input Voltage Range	1.7V to 5.25V - compatible with wide-input PMIC outputs and multi-rail system supplies.

Pinout & Package

The AP7340-22FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad (non-functional GND connection recommended). PCB layout requires minimum 0.47µF ceramic capacitors placed adjacent to VIN/VOUT/GND pins and wide copper pour under the thermal pad for thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated Power Output	Delivers clean 2.2V to load; must be decoupled with 0.47µF ceramic capacitor placed <1mm from pin.
GND (Pin 2)	Reference Ground	Primary return path for load current and internal circuitry; connects to thermal pad for enhanced heat transfer.
EN (Pin 3)	Enable Control Input	CMOS-level digital input: ≥1.3V = active, ≤0.5V = shutdown; must not float - tie to VIN if unused.
VIN (Pin 4)	Unregulated Input Supply	Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling capacitor placed adjacent to minimize input impedance.

Key Features

Feature	Design Value
High PSRR at 1kHz	75dB - rejects ripple from noisy switchers powering baseband processors or PMICs.
Ultra-Low Output Noise	60µV_RMS (10Hz–100kHz) - avoids modulation artifacts in RF synthesizers and high-resolution ADCs.
Low Quiescent Current	35µA - enables >1-year battery life in maintenance-free IoT sensor nodes with periodic wake-up.
Precision Output Accuracy	±1% @25°C - eliminates need for post-regulation trimming in factory calibration of camera modules.
Small Footprint Package	X2-DFN1010-4 (1.0×1.0mm) - saves >60% board area vs. SOT-23, enabling dense RF module layouts.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

Use Scenario: Provides stable 2.2V bias to GaAs pHEMT driver stages in 4G/5G front-end modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering clean V_CC to PA bias networks independent of main PMIC rail noise.

Use Value: Prevents AM-to-PM distortion and EVM degradation by suppressing 1–10MHz switching noise from adjacent buck converters.

Use Scenario: Powers image sensor analog core (ADC reference, PLL, pixel array bias) in smartphone rear cameras.

IC Role / Device Role / Timing Role: Fixed-output LDO supplying regulated 2.2V with minimal noise coupling into sensitive analog signal paths.

Use Value: Reduces fixed-pattern noise and improves SNR by limiting RMS noise contribution to <0.003% of full-scale output.

Wireless Adapter PHY Rail

Portable Media Player Audio Codec

Use Scenario: Supplies 2.2V to Wi-Fi/BT SoC PHY layer circuits in USB dongles and embedded modules.

IC Role / Device Role / Timing Role: Enable-controlled LDO allowing dynamic power gating of RF transceivers during sleep states.

Use Value: Cuts standby current to <1µA via EN pin, extending host device battery runtime without firmware intervention.

Use Scenario: Delivers low-noise 2.2V to stereo DAC and headphone amplifier in portable music players.

IC Role / Device Role / Timing Role: Post-regulator for audio subsystems requiring ultra-low broadband noise and fast transient response.

Use Value: Enables >110dB THD+N performance by limiting integrated noise to <10µV across audible band (20Hz–20kHz).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2202E/TO	2.2V fixed, 250mA, 6µA IQ, but only 60dB PSRR @1kHz and 120µV_RMS noise.	Lacks RF-grade noise/PSRR; suited for non-sensitive digital I/O rails, not RF or audio.	Select when ultra-low IQ dominates over noise/PSRR requirements and higher output current is needed.
TPS7A0522PDBVR	2.2V fixed, 200mA, 25µA IQ, 70dB PSRR @1kHz, 8µV_RMS noise - superior noise but lower PSRR than AP7340-22FS4-7.	Better for ultra-low-noise analog, weaker for mid-frequency ripple rejection (e.g., from 1MHz buck converters).	Prefer for audio codec V_REF where µV-level noise matters most; avoid where 1–10kHz switching noise dominates.

Compared with MCP1700-2202E/TO and TPS7A0522PDBVR, the AP7340-22FS4-7 uniquely balances 75dB PSRR, 60µV_RMS noise, and 35µA IQ in a 1.0mm² footprint - making it optimal for space-constrained RF and imaging subsystems where both mid-band ripple and broadband noise must be suppressed simultaneously.

Availability

AP7340-22FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, wireless adapter PHY rail, and portable media player audio codec applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for AP7340-22FS4-7 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 devices, with design centers across Asia, Europe, and the US.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable communication equipment including smartphones, tablets, and wireless modules.

FAQ

What is the maximum allowable input voltage for AP7340-22FS4-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V risks violating safe operating area limits and may trigger thermal shutdown or permanent damage, especially under load. Operation above 5.25V is not characterized or guaranteed per the datasheet.

Does AP7340-22FS4-7 include output auto-discharge functionality?

No. AP7340-22FS4-7 is the non-discharge variant (standard AP7340, not AP7340D). When disabled via EN pin, the output remains floating and retains voltage until discharged by external load or parallel leakage paths. This behavior is confirmed by the "AP7340 (non-discharge)" label in the functional block diagram.

Can AP7340-22FS4-7 operate with ceramic output capacitors smaller than 0.47µF?

No. The datasheet explicitly specifies 0.47µF as the minimum recommended ceramic output capacitance for stability across temperature and load conditions. Using smaller values risks oscillation or degraded transient response, particularly under 150mA step loads - verified by stability testing in the Application Information section.

What is the thermal pad connection requirement for X2-DFN1010-4 package?

The thermal pad must be connected to a large copper pour on the PCB for effective heat dissipation, but it is not electrically tied to GND internally. Diodes recommends connecting the pad to GND for improved thermal and electrical performance, though leaving it unconnected is permissible if thermal limits are not exceeded. The pad is not a functional electrode - no current flows through it by design.

AP7340-22FS4-7 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):: 2.2V

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

AP7340-22FS4-7 FAQ

1.How can I place an order for AP7340-22FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-22FS4-7 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 AP7340-22FS4-7 reliable?

The price and inventory of AP7340-22FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-22FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-22FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-22FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-22FS4-7?

AP7340-22FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-22FS4-7 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 AP7340-22FS4-7?

For technical support, including AP7340-22FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-22FS4-7 requirements.

6.How does Aetrix verify that AP7340-22FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-22FS4-7 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 AP7340-22FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-22FS4-7?

All AP7340-22FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-22FS4-7, 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 AP7340-22FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-22FS4-7:

1.Submit a request within 90 days.

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

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