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

Diodes Incorporated AP7340-32FS4-7

Name: AP7340-32FS4-7
Brand: Diodes Incorporated
SKU: AP7340-32FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340-32FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340-32FS4-7.pdf

Description:: IC REG LINEAR 3.2V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,820

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Product details

Overview

AP7340-32FS4-7 from Diodes Incorporated is a 3.2V 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 rails in portable wireless communication devices.

For engineers reviewing the AP7340-32FS4-7 datasheet, AP7340-32FS4-7 pinout, AP7340-32FS4-7 application, or AP7340-32FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.21–0.27V), EN logic thresholds (0.5V low / 1.3V high), thermal performance in X2-DFN1010-4, and stability with 0.47µF ceramic capacitors.

Technical Context

The AP7340-32FS4-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor - enabling fast line/load transient response and stable regulation under dynamic conditions. Its non-discharge architecture avoids output discharge during shutdown, preserving downstream capacitor charge.

Designed for low-noise biasing, it delivers 60µV_rms noise across 10Hz–100kHz and achieves 75dB ripple rejection at 1kHz due to high PSRR architecture. The enable input supports direct logic-level control with <1.0µA leakage and defined VIH/VIL thresholds for reliable sequencing.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.2V ±1% (25°C), ±1.5% (–40°C to +85°C) - ensures stable RF IC bias without external feedback network
Max Output Current	150mA continuous - sufficient for RF transceivers, camera ISPs, and baseband processors in handheld devices
Dropout Voltage	0.21–0.27V at 150mA (for VOUT = 3.2V) - enables operation down to VIN = 3.41V, critical for single-cell Li-ion systems
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy power domains
Output Noise	60µV_rms (10Hz–100kHz) - meets stringent spectral purity requirements for RF front-end and ADC reference supplies
Quiescent Current	35µA typical (IOUT = 0mA) - extends battery life in always-on sensor and standby circuits
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting

Pinout & Package

The AP7340-32FS4-7 is housed in a 1.0mm × 1.0mm, 0.4mm height X2-DFN1010-4 package with exposed thermal pad - optimized for space-constrained portable PCBs and thermal dissipation via PCB copper area connected to GND.

Pin/Terminal	Circuit Role	Design Meaning
PIN1: VOUT	Regulated power output	Delivers clean 3.2V to load; requires 0.47µF ceramic capacitor placed adjacent to minimize impedance
PIN2: GND	Power ground reference	Primary return path for load current; must connect directly to low-impedance ground plane to maintain PSRR and stability
PIN3: EN	Active-high enable control	Drives regulator ON/OFF; must not float - tie to VIN if unused; supports power sequencing with µA-level leakage
PIN4: VIN	Unregulated input supply	Accepts 1.7–5.25V; requires local 0.47µF decoupling capacitor near pin to suppress supply glitches
Thermal Pad	Thermal dissipation node	Not electrically functional; must be soldered to large GND copper area for thermal management (PD max = 400mW)

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Enables co-location with noisy DC/DC converters without compromising RF signal integrity
Ultra-low 60µV_rms noise	Supports high-SNR analog blocks like RF synthesizers and precision ADC references
35µA quiescent current	Reduces no-load power loss by >50% vs. legacy LDOs, extending battery runtime in sleep modes
±1% output accuracy	Eliminates need for post-regulation trimming in production, improving yield for 3.2V-sensitive RF ICs
X2-DFN1010-4 footprint	0.75mm² board area - smallest industry-standard DFN for 150mA LDOs, enabling dense mobile PCB layouts

Applications

RF Transceiver Power

Camera Image Signal Processor

Use Scenario: Supplying VCC_RF rail for 2.4GHz/5GHz Wi-Fi/BT transceivers in smartphones and tablets.

IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO providing regulated 3.2V bias to RF power amplifiers and mixers.

Use Value: 75dB PSRR prevents switching noise from PMIC DC/DC stages from degrading EVM and ACLR performance.

Use Scenario: Powering ISP core and analog front-end in dual-camera modules of portable media players.

IC Role / Device Role / Timing Role: Fixed 3.2V LDO delivering clean supply during burst-mode image capture and video encoding.

Use Value: 60µV_rms noise ensures minimal fixed-pattern noise and improved SNR in high-resolution image pipelines.

Wireless Adapter Module

Portable Video Decoder

Use Scenario: Regulating power for USB-C wireless docking adapters with integrated Bluetooth LE and Zigbee radios.

IC Role / Device Role / Timing Role: Enable-controlled LDO supplying 3.2V to radio SoCs during active link negotiation and data transfer.

Use Value: 35µA quiescent current and fast EN turn-on (<10µs) minimize standby power and support rapid wake-from-sleep.

Use Scenario: Providing stable 3.2V supply to H.264/H.265 video decoder ASICs in portable media players.

IC Role / Device Role / Timing Role: High-accuracy LDO maintaining voltage within ±1.5% across –40°C to +85°C ambient range.

Use Value: Tight output tolerance prevents decoder clock jitter and frame drop during thermal cycling in uncooled enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	3.3V output (0.1V higher), 250mA rating, 6µA IQ, but only 60dB PSRR @ 1kHz and 30µV_rms noise	Better for ultra-low-power always-on sensors; insufficient PSRR/noise performance for RF supply	Select only if 3.3V tolerance allows and RF noise immunity is not required
Torex XC6206P322MR-G	3.2V output, 150mA, ±2% accuracy, 50dB PSRR @ 1kHz, 120µV_rms noise, SOT-25 package (larger footprint)	Higher noise and lower PSRR limit use in sensitive RF/analog chains; larger package increases board area	Acceptable for cost-sensitive non-RF applications where 1.0mm × 1.0mm footprint is not mandatory

Compared with MCP1700-3302E/TO and XC6206P322MR-G, the AP7340-32FS4-7 uniquely balances 3.2V precision, 75dB PSRR, 60µV_rms noise, and 1.0mm × 1.0mm size - making it the only option qualified for RF supply rails in space- and noise-constrained portable designs.

Availability

AP7340-32FS4-7 is available at Aetrix Electronics and suitable for RF transceiver power, camera ISP biasing, wireless adapter modules, and portable video decoding requiring stable component supply, consistent parametric performance, and long-term lifecycle continuity.

Supply support for AP7340-32FS4-7 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-reliability power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO product line - engineered specifically for noise-sensitive analog and RF subsystems in battery-powered portable electronics where compact size and efficiency are critical.

FAQ

What is the minimum input voltage required for AP7340-32FS4-7 to regulate 3.2V at 150mA?

The dropout voltage is 0.21–0.27V at 150mA for 3.2V output. Therefore, minimum VIN is 3.41V (3.2V + 0.21V) under worst-case conditions. Operation below this causes output collapse; datasheet specifies absolute min VIN = 1.7V but regulation requires VIN ≥ VOUT + dropout.

Can AP7340-32FS4-7 be used without an enable signal?

Yes - the EN pin must not float. If enable functionality is unused, tie EN directly to VIN to ensure permanent ON state. This draws only 35µA quiescent current and maintains full regulation without external logic control.

Is the thermal pad of AP7340-32FS4-7 electrically connected to GND internally?

No - the thermal pad is electrically isolated. It serves only for heat conduction and must be soldered to a PCB copper area connected to GND (or left floating) per layout guidelines. Using it as sole GND connection violates internal pin mapping and risks thermal failure.

Does AP7340-32FS4-7 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 absolute maximum ratings.

AP7340-32FS4-7 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):: 3.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.27V @ 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

AP7340-32FS4-7 FAQ

1.How can I place an order for AP7340-32FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340-32FS4-7 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 AP7340-32FS4-7 reliable?

The price and inventory of AP7340-32FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340-32FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340-32FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340-32FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340-32FS4-7?

AP7340-32FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340-32FS4-7 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 AP7340-32FS4-7?

For technical support, including AP7340-32FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340-32FS4-7 requirements.

6.How does Aetrix verify that AP7340-32FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340-32FS4-7 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 AP7340-32FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340-32FS4-7?

All AP7340-32FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340-32FS4-7, 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 AP7340-32FS4-7 part is unused and in its original packaging.

Return procedure for AP7340-32FS4-7:

1.Submit a request within 90 days.

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

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