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

Diodes Incorporated AP7341-12FS4-7

Name: AP7341-12FS4-7
Brand: Diodes Incorporated
SKU: AP7341-12FS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7341-12FS4-7

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7341-12FS4-7.pdf

Description:: IC REG LINEAR 1.2V 300MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7341-12FS4-7 from Diodes Incorporated is a 300mA, 1.2V fixed-output low-dropout linear regulator with ±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 subsystems in space-constrained handheld devices.

For engineers reviewing the AP7341-12FS4-7 datasheet, AP7341-12FS4-7 pinout, AP7341-12FS4-7 application, or AP7341-12FS4-7 equivalent, key selection criteria include dropout voltage at 150mA (0.50–0.62V), enable threshold compatibility (EN high ≥1.3V), thermal pad layout requirements, and ceramic capacitor stability with ESR <100mΩ.

Technical Context

The AP7341-12FS4-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable control. Its architecture delivers fast load transient response (<100µs settling) and maintains regulation down to 1.7V input across –40°C to +85°C ambient.

It employs a low-R_DS(on) N-channel pass transistor enabling 0.21–0.27V dropout at 300mA for V_OUT = 3.3V, scaled proportionally for 1.2V output. The thermal pad (exposed copper under package) must be connected to GND or large copper pour for 400mW power dissipation handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2V ±1% at +25°C; ±1.5% over –40°C to +85°C - ensures stable core logic or sensor biasing without external feedback.
Max Output Current	300mA guaranteed - supports single-core microcontrollers, camera ISPs, or Bluetooth SoCs with burst-mode loads.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding RF front-ends or ADC references.
Output Noise	60µV_rms (10Hz–100kHz) - preserves SNR in audio codecs and high-resolution image sensors.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and wearable standby modes.
Dropout Voltage	0.50–0.62V at 150mA (1.1V ≤ V_OUT < 1.5V range) - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (2.4V min) sources.
Enable Threshold	V_EN(H) ≥1.3V, V_EN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

X2-DFN1010-4 package: 1.0mm × 1.0mm footprint, 0.4mm height, exposed thermal pad (Pin 5, not electrically connected - must be soldered to GND plane).

Pin/Terminal	Circuit Role	Design Meaning
PIN1	VOUT	Regulated 1.2V power output - requires low-inductance ceramic capacitor (≥1.0µF) placed within 2mm of pin.
PIN2	GND	Analog/digital ground reference - must connect directly to thermal pad and system ground plane with multiple vias.
PIN3	EN	Active-high enable - floating prohibited; tie to VIN for always-on operation or drive with MCU GPIO for sequenced power-up.
PIN4	VIN	Input supply (1.7–5.25V) - requires 0.47µF ceramic decoupling capacitor placed adjacent to pin with short trace to GND.

Key Features

Feature	Design Value
Ultra-low noise output	60µV_rms enables clean power for RF synthesizers and high-speed ADCs without additional filtering.
High PSRR at 1kHz	75dB rejection of PMIC ripple allows co-location with noisy buck converters on compact PCBs.
Low quiescent current	35µA operation supports >1-year battery life in IoT endpoint sleep modes (e.g., BLE beacon interval).
Small-footprint packaging	X2-DFN1010-4 (1.0×1.0mm) reduces board area by 60% vs. SOT-23, critical for smartphone camera modules.
Thermal-enhanced layout	Exposed thermal pad improves θ_JA to 220°C/W (JEDEC High-K board), enabling 300mA continuous output at +60°C ambient.

Applications

RF Power Amplifier Bias

Camera Image Signal Processor

Use Scenario: Stable 1.2V supply for GaAs pHEMT driver stages in 4G/5G handset front-end modules.

IC Role / Device Role / Timing Role: Low-noise LDO providing clean V_CC to PA bias circuitry, rejecting coupled switching noise from envelope tracking supplies.

Use Value: Maintains EVM <–35dB under 20MHz LTE modulation by limiting supply-induced phase noise.

Use Scenario: Core voltage rail for 12-bit CMOS image sensor ISP in smartphone rear cameras.

IC Role / Device Role / Timing Role: Fixed 1.2V regulator powering digital logic and analog front-end blocks with minimal supply-induced pixel noise.

Use Value: Reduces fixed-pattern noise (FPN) by 40% versus higher-noise alternatives, improving SNR at low-light ISO settings.

Bluetooth LE Audio Codec

Wearable Sensor Hub

Use Scenario: Powering dual-core DSP in Bluetooth LE audio transceivers requiring low-latency, low-jitter clock domains.

IC Role / Device Role / Timing Role: Primary 1.2V core supply for audio processing ASIC, synchronized to internal PLL reference.

Use Value: Enables <10µs wake-from-sleep latency and <0.1% THD+N by eliminating supply-induced jitter on clock recovery paths.

Use Scenario: Always-on power source for multi-axis accelerometer, gyroscope, and heart-rate monitor fusion engine.

IC Role / Device Role / Timing Role: Ultra-low-I_Q LDO delivering regulated 1.2V during 99% duty-cycle sleep mode with fast wake-up response.

Use Value: Extends CR2032 coin-cell lifetime to 18 months while supporting sub-100ms motion-triggered data logging.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1202E/TT	250mA max output, 6µV_rms noise (lower), but only 60dB PSRR at 1kHz and no enable pin.	Lacks EN control and lower PSRR limits use in RF-coupled systems; better suited for ultra-low-noise analog sensors only.	Select when noise is primary constraint and enable sequencing is unnecessary.
Torex XC6210B122MR-G	300mA output, 1.2V ±2% accuracy, 45µA I_Q, but 65dB PSRR and no thermal pad - θ_JA = 320°C/W.	Higher thermal resistance restricts continuous 300mA operation above +45°C ambient; unsuitable for enclosed handheld enclosures.	Select for cost-sensitive consumer wearables with moderate temperature rise and no RF proximity.

Compared with MCP1700T-1202E/TT and XC6210B122MR-G, the AP7341-12FS4-7 uniquely balances 300mA capability, 75dB PSRR, 35µA I_Q, and thermal-pad-enabled reliability - making it optimal for thermally dense, RF-integrated portable designs where all three parameters are simultaneously required.

Availability

AP7341-12FS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP power, Bluetooth LE audio codec supply, and wearable sensor hub applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant green packaging.

Supply support for AP7341-12FS4-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.

The AP7341 belongs to Diodes' high-PSRR, low-noise LDO family targeting battery-powered portable electronics - engineered to replace legacy regulators in smartphones, tablets, and wireless peripherals where size, efficiency, and noise performance are critical.

FAQ

What is the minimum input voltage required for AP7341-12FS4-7 to maintain regulation at 300mA load?

The AP7341-12FS4-7 requires VIN ≥ (VOUT + dropout voltage). At 300mA and 1.2V output, dropout is 0.50–0.62V per datasheet Table 2, so minimum VIN is 1.70–1.82V. Operation below 1.7V violates Recommended Operating Conditions and may cause output collapse.

Can the thermal pad be left unconnected in the PCB layout?

No. The exposed thermal pad (Pin 5) must be soldered to a GND-connected copper pour using ≥4 thermal vias (0.3mm diameter). Leaving it unconnected degrades θ_JA by >80°C/W, risking thermal shutdown at >150mA in still-air conditions per JEDEC test board data.

Does AP7341-12FS4-7 include reverse-current protection or output discharge functionality?

No. The AP7341-12FS4-7 is the non-discharge version (no 'D' suffix). When disabled via EN, the output remains floating - external bleed resistor or dedicated discharge FET is required if rapid VOUT decay is needed for system sequencing.

What ceramic capacitor characteristics are mandatory for stable operation?

A 1.0µF X5R/X7R ceramic capacitor with ESR <100mΩ is required at VOUT. Per Figure 1 and Application Information, capacitance tolerance must be ±20%, and placement must be within 2mm of VOUT/GND pins with direct low-inductance ground return path.

AP7341-12FS4-7 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):: 0.65V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: -

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

AP7341-12FS4-7 FAQ

1.How can I place an order for AP7341-12FS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7341-12FS4-7 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 AP7341-12FS4-7 reliable?

The price and inventory of AP7341-12FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-12FS4-7 is usually 5 days.

3.What payment methods are accepted for AP7341-12FS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-12FS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7341-12FS4-7?

AP7341-12FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7341-12FS4-7 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 AP7341-12FS4-7?

For technical support, including AP7341-12FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-12FS4-7 requirements.

6.How does Aetrix verify that AP7341-12FS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7341-12FS4-7 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 AP7341-12FS4-7 meets industry standards.

7.What is the process for return or replacement of AP7341-12FS4-7?

All AP7341-12FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-12FS4-7, 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 AP7341-12FS4-7 part is unused and in its original packaging.

Return procedure for AP7341-12FS4-7:

1.Submit a request within 90 days.

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

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