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

Diodes Incorporated AP7340D-12FS4-7

Name: AP7340D-12FS4-7
Brand: Diodes Incorporated
SKU: AP7340D-12FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7340D-12FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7340D-12FS4-7.pdf

Description:: IC REG LINEAR 1.2V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Inventory:9,335

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Product details

Overview

AP7340D-12FS4-7 from Diodes Incorporated is a 1.2V fixed-output, 150mA low-dropout linear regulator with ±1% output accuracy, 75dB PSRR at 1kHz, 60µV_RMS output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and an integrated discharge FET for rapid V_OUT discharge during shutdown-designed for RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7340D-12FS4-7 datasheet, AP7340D-12FS4-7 pinout, AP7340D-12FS4-7 application, or AP7340D-12FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.38V typ. for 1.2V output), EN logic thresholds (0.5V_IL/1.3V_IH), thermal pad layout requirements, and compatibility with 0.47µF ceramic input/output capacitors.

Technical Context

The AP7340D-12FS4-7 employs a CMOS-based LDO architecture with a precision voltage reference, error amplifier, and current-limit circuit. Its built-in auto-discharge NMOS (30Ω typical on-resistance) actively pulls V_OUT to GND when EN is low-eliminating residual voltage hold-up in power sequencing-critical systems.

It operates across 1.7V–5.25V input range with guaranteed 150mA output, supports fast load transient response (<100µs settling time), and maintains stability with minimal 0.47µF ceramic capacitors due to optimized internal compensation-no external compensation required.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2V ±1% (25°C), ±1.5% (–40°C to +85°C) - ensures stable core bias for low-voltage RF ICs
Max Output Current	150mA continuous - sufficient for single-band RF transceivers or camera sensor analog rails
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails
Output Noise	60µV_RMS (10Hz–100kHz) - preserves SNR in sensitive RF front-end and ADC reference paths
Quiescent Current	35µA (typ.) - enables >1-year battery life in always-on IoT sensor nodes with periodic wake-up
Dropout Voltage	0.38V (typ.) at 150mA - allows operation from single-cell Li-ion (3.0V min) down to 1.58V input
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting
Thermal Shutdown	Activated at T_J ≈ 150°C - protects against sustained overload in compact PCB layouts

Pinout & Package

X2-DFN1010-4 package: 1.0mm × 1.0mm footprint, 0.4mm height, wettable flank leads, exposed thermal pad (connected to GND for optimal thermal performance).

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 1)	Regulated power output	Delivers clean 1.2V; requires 0.47µF ceramic capacitor placed <1mm from pin to minimize ESR-induced instability
GND (Pin 2)	Power ground reference	Must connect directly to PCB ground plane; shares thermal pad connection to reduce junction-to-board θ_JA
EN (Pin 3)	Active-high enable control	Pulled high (>1.3V) to activate regulator; pulled low (<0.5V) to disable with active discharge of VOUT
VIN (Pin 4)	Unregulated input supply	Accepts 1.7V–5.25V; requires 0.47µF decoupling capacitor placed adjacent to pin to suppress supply ripple

Key Features

Feature	Design Value
Integrated discharge FET	30Ω typical on-resistance enables <100µs VOUT discharge to <0.1V after EN deactivation-critical for power sequencing in multi-rail SoC systems
Ultra-low noise output	60µV_RMS (10Hz–100kHz) meets stringent RF PLL and VCO supply requirements without additional filtering
High PSRR at low frequency	75dB at 1kHz suppresses ripple from buck converter switching frequencies and their harmonics
Wide input voltage range	1.7V–5.25V supports direct connection to single-cell Li-ion, USB VBUS, or intermediate DC/DC outputs
±1% output accuracy	Tight tolerance ensures reliable operation of 1.2V core supplies for ARM Cortex-M0+/M4 microcontrollers and RF transceivers

Applications

RF Transceiver Power Rail

Camera Sensor Analog Supply

Use Scenario: Powering the VDD_RF rail of a 2.4GHz BLE/Wi-Fi transceiver IC in a compact wearable device.

IC Role / Device Role / Timing Role: Provides ultra-low-noise, tightly regulated 1.2V supply to RF synthesizer and PA bias circuits.

Use Value: 60µV_RMS noise and 75dB PSRR prevent phase noise degradation and maintain EVM <3% at 20MHz bandwidth.

Use Scenario: Supplying analog core voltage (AVDD) to a 12MP image sensor in a smartphone front camera module.

IC Role / Device Role / Timing Role: Delivers stable 1.2V with fast transient response to support rolling shutter readout and burst capture.

Use Value: 150mA capability and <100µs load-step recovery eliminate image banding during flash-assisted low-light capture.

Portable Media Player Codec Bias

IoT Edge Node MCU Core Supply

Use Scenario: Generating clean 1.2V for audio codec DAC/ADC analog sections in a Bluetooth speaker.

IC Role / Device Role / Timing Role: Low-noise LDO replacing switching regulator output to avoid audible beat frequencies in audio path.

Use Value: 60µV_RMS noise floor ensures THD+N <–95dB, enabling CD-quality playback without post-filtering.

Use Scenario: Powering the 1.2V core rail of an ARM Cortex-M4F microcontroller in a battery-powered environmental sensor node.

IC Role / Device Role / Timing Role: Enables ultra-low-power active mode with 35µA IQ while maintaining 150mA headroom for radio transmission bursts.

Use Value: Combined 35µA IQ and 0.38V dropout extends coin-cell battery life to >2 years in 1-minute wake-up interval deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-1202E/TO	1.2V, 250mA, 6µA IQ, no enable or discharge FET, TO-92 package	Larger footprint, no power sequencing control, unsuitable for space-constrained RF modules	Choose only if board area and sequencing are non-critical and ultra-low IQ dominates design priority
Torex XC6210B122MR-G	1.2V, 150mA, 35µA IQ, enable pin, no discharge FET, SOT-25 package	Larger 2.9mm × 2.8mm footprint, lacks active VOUT discharge-requires external circuitry for clean shutdown	Select when cost sensitivity outweighs board area constraints and discharge functionality is handled externally

Compared with MCP1700-1202E/TO and XC6210B122MR-G, the AP7340D-12FS4-7 uniquely combines X2-DFN1010-4 miniaturization, integrated discharge, and RF-grade noise/PSRR-making it the only option meeting simultaneous size, sequencing, and signal integrity requirements in modern portable RF designs.

Availability

AP7340D-12FS4-7 is available at Aetrix Electronics and suitable for RF transceiver power rails, camera sensor analog supplies, and IoT edge node MCU core regulation requiring stable component supply, full lifecycle traceability, and RoHS-compliant green packaging.

Supply support for AP7340D-12FS4-7 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 automotive markets.

The AP7340 series belongs to Diodes' high-PSRR, low-noise LDO product line-engineered specifically for noise-sensitive analog and RF subsystems in portable wireless equipment where board space, power efficiency, and signal purity are critical.

FAQ

What is the function of the thermal pad on the AP7340D-12FS4-7 package?

The exposed thermal pad on the X2-DFN1010-4 package must be soldered to a PCB copper area connected to GND. This reduces thermal resistance (θ_JA) by up to 40°C/W versus floating pad, enabling 150mA operation at +85°C ambient without derating. Do not use it as sole GND electrode-connect via multiple vias to inner ground planes.

Does the AP7340D-12FS4-7 require external capacitors, and what values are validated?

Yes: a minimum 0.47µF X5R/X7R ceramic capacitor is required between VIN and GND, and another 0.47µF between VOUT and GND. These values are validated for stability across –40°C to +85°C and ensure <100µs transient response. Place both capacitors within 1mm of respective pins using wide, low-inductance traces.

How does the discharge FET in the 'D' variant differ from the standard AP7340?

The AP7340D-12FS4-7 integrates an NMOS discharge switch (30Ω typ.) between VOUT and GND, activated automatically when EN is low. Standard AP7340 lacks this feature-its VOUT floats after shutdown, risking unintended biasing of downstream circuitry. The D-variant eliminates need for external bleed resistors in power-sequenced systems.

Can the AP7340D-12FS4-7 operate from a 1.8V input while delivering 150mA at 1.2V?

Yes: with 1.8V input, dropout is 0.38V (typ.), leaving 1.42V at VOUT-well above the 1.2V nominal output. At 150mA load, actual VOUT remains within ±1.5% tolerance (1.182V–1.218V) across temperature. Input must stay ≥1.7V to guarantee regulation; below that, output collapses.

AP7340D-12FS4-7 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):: 1.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.62V @ 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

AP7340D-12FS4-7 FAQ

1.How can I place an order for AP7340D-12FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7340D-12FS4-7 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 AP7340D-12FS4-7 reliable?

The price and inventory of AP7340D-12FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7340D-12FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7340D-12FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7340D-12FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7340D-12FS4-7?

AP7340D-12FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7340D-12FS4-7 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 AP7340D-12FS4-7?

For technical support, including AP7340D-12FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7340D-12FS4-7 requirements.

6.How does Aetrix verify that AP7340D-12FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7340D-12FS4-7 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 AP7340D-12FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7340D-12FS4-7?

All AP7340D-12FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7340D-12FS4-7, 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 AP7340D-12FS4-7 part is unused and in its original packaging.

Return procedure for AP7340D-12FS4-7:

1.Submit a request within 90 days.

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

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