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Diodes Incorporated AP7341D-18FS4-7
- Part No.:
- AP7341D-18FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7341D-18FS4-7.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,550
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Product details
Overview
AP7341D-18FS4-7 from Diodes Incorporated is a 300mA, 1.8V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVRMS output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in compact portable devices requiring stable, low-noise bias.
For engineers reviewing the AP7341D-18FS4-7 datasheet, AP7341D-18FS4-7 pinout, AP7341D-18FS4-7 application, or AP7341D-18FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (0.50V typ @ VOUT=1.8V), enable-controlled shutdown (ISTANDBY = 0.01µA), thermal performance in X2-DFN1010-4, and compatibility with 1.0µF ceramic input/output capacitors.
Technical Context
The AP7341D-18FS4-7 employs a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input (EN) provides precise on/off control with defined logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V), and it features built-in short-circuit protection clamping output current to ~60mA during VOUT-to-GND faults.
This regulator operates across 1.7V–5.25V input range while maintaining 1.8V output stability under load transients up to 300mA. It delivers high power-supply rejection (75dB @ 1kHz) and ultra-low noise (60µVRMS) due to optimized internal compensation and low-RDS(ON) pass element - critical for sensitive RF and analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (25°C), ±1.5% (−40°C to +85°C) - ensures stable core/bias rail for 1.8V I/O domains and RF ICs. |
| Max Output Current | 300mA guaranteed - supports moderate-power subsystems like camera ISPs or Bluetooth SoCs without thermal derating in typical PCB layouts. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy power domains. |
| Output Noise | 60µVRMS (10Hz–100kHz) - minimizes phase noise impact in VCOs, LNAs, and ADC reference supplies. |
| Quiescent Current | 35µA typical - enables always-on functionality in battery-powered devices with minimal standby drain. |
| Dropout Voltage | 0.50V typ @ 150mA, 0.65V max @ 300mA (VOUT=1.8V) - allows operation from single-cell Li-ion (3.0V min) or 2.5V system rails. |
| Enable Thresholds | VIL ≤ 0.5V, VIH ≥ 1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
Packaged in a 1.0mm × 1.0mm X2-DFN1010-4 with exposed thermal pad, this ultra-compact LDO enables high-density PCB layouts in space-constrained mobile and wearable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 - VOUT | Regulated Power Output | Delivers clean 1.8V to load; requires low-ESR ceramic capacitor (≥1.0µF) placed adjacent to pin for stability and transient response. |
| PIN2 - GND | Power Ground Reference | Primary return path for output current; must connect directly to low-impedance ground plane to minimize noise coupling and voltage drop. |
| PIN3 - EN | Active-High Enable Control | Drives regulator ON when ≥1.3V; pulls into shutdown (<0.5V) with <1.0µA leakage - enables system-level power sequencing and battery conservation. |
| PIN4 - VIN | Unregulated Input Supply | Accepts 1.7V–5.25V input; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin to suppress supply glitches. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Quiescent Current | 35µA typical - extends battery life in always-on sensor nodes and IoT endpoints without sacrificing regulation accuracy. |
| High PSRR at Low Frequencies | 75dB @ 1kHz - effectively filters ripple from buck converter outputs or noisy shared power rails feeding RF sections. |
| Low Output Noise | 60µVRMS (10Hz–100kHz) - preserves signal integrity in precision analog front-ends and high-SNR audio paths. |
| Thermally Optimized Package | X2-DFN1010-4 with thermal pad - achieves >150°C/W junction-to-ambient θJA on 2-layer PCBs with 100mm² copper pour, enabling 300mA continuous operation. |
| Integrated Short-Circuit Protection | ~60mA fold-back current limit - prevents thermal runaway and device damage during accidental VOUT-to-GND faults without external components. |
Applications
| Smartphone RF Front-End | Portable Camera Module |
|---|---|
|
Use Scenario: Powering LNA, mixer, and PA bias rails in LTE/5G RF transceivers. IC Role / Device Role / Timing Role: Low-noise 1.8V supply for RF signal chain components requiring minimal phase noise contribution. Use Value: 60µVRMS noise and 75dB PSRR prevent AM-to-PM conversion and EVM degradation in transmit paths. |
Use Scenario: Supplying image signal processor (ISP) core and CIS analog blocks in smartphone rear cameras. IC Role / Device Role / Timing Role: Stable 1.8V domain regulator for high-speed parallel/MIPI interfaces and analog pixel readout circuits. Use Value: ±1% accuracy and fast load transient response (<10µs settling) maintain timing margins during burst-mode capture. |
| Wireless Audio Earbuds | Bluetooth LE Sensor Node |
|
Use Scenario: Providing clean 1.8V bias to MEMS microphones and Class-D audio amplifiers. IC Role / Device Role / Timing Role: Ultra-low-noise, low-IQ LDO for audio signal conditioning and DAC reference support. Use Value: 35µA quiescent current extends talk time; 60µVRMS noise avoids audible hiss in high-gain microphone preamps. |
Use Scenario: Powering BLE SoC peripherals (ADC, sensor interface, flash memory) in coin-cell–powered wearables. IC Role / Device Role / Timing Role: Enable-controlled 1.8V supply enabling deep-sleep mode with sub-1µA system standby current. Use Value: 0.01µA shutdown current and 1.7V minimum VIN allow operation down to 2.0V battery voltage with full regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250mA output, 6µA IQ, 65dB PSRR @ 1kHz, SOT-23-5 package | Larger footprint, lower PSRR, no enable pin - suited for cost-sensitive, low-current applications where size is secondary. | Select when ultra-low IQ dominates over noise/PSRR and enable control is unnecessary. |
| Torex XC6206P182MR-G | 300mA output, 15µA IQ, 55dB PSRR @ 1kHz, SOT-25 package | Higher dropout (0.35V @ 100mA), no thermal pad - limited thermal headroom in dense layouts. | Choose for legacy SOT-25 compatibility and lower IQ, but verify thermal margin at 300mA in final layout. |
Compared with MCP1700-1802E/TO and XC6206P182MR-G, the AP7341D-18FS4-7 uniquely combines 300mA capability, 75dB PSRR, 60µVRMS noise, and X2-DFN1010-4 thermal efficiency - making it optimal for next-generation RF and imaging subsystems where noise, size, and power integrity are co-constrained.
Availability
AP7341D-18FS4-7 is available at Aetrix Electronics and suitable for smartphone RF supply, portable camera modules, and wireless audio earbuds requiring stable component supply with tight voltage tolerance and low-noise performance.
Supply support for AP7341D-18FS4-7 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-performance power management, signal integrity, and connectivity solutions for consumer, industrial, and automotive markets.
The AP7341 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive applications in portable communications equipment - emphasizing small footprint, low IQ, and robust transient response.
FAQ
What is the minimum input voltage required for stable 1.8V output at 300mA?
The AP7341D-18FS4-7 requires a minimum input voltage of 2.3V to maintain regulated 1.8V output at 300mA load, based on its maximum dropout voltage of 0.65V (VIN = VOUT + VDROP). At 150mA, dropout drops to 0.50V typ, allowing stable operation from 2.3V input.
Does AP7341D-18FS4-7 include automatic output discharge?
Yes - the "D" suffix in AP7341D-18FS4-7 indicates the built-in discharge function. When disabled via the EN pin, an internal 30Ω NMOS connects VOUT to GND, discharging external capacitance rapidly to prevent floating or unintended biasing of downstream circuitry.
Can AP7341D-18FS4-7 operate with only ceramic capacitors?
Yes - the device is internally compensated and stable with ≥1.0µF ceramic output capacitors (X5R/X7R) and ≥0.47µF ceramic input capacitors. No tantalum or electrolytic capacitors are required, simplifying BOM and improving reliability in temperature-cycled environments.
How does thermal performance compare between AP7341D-18FS4-7 and standard SOT-23 LDOs?
The X2-DFN1010-4 package's exposed thermal pad reduces θJA by ~40% versus SOT-23-5 under identical PCB conditions. With 100mm² copper pour, AP7341D-18FS4-7 sustains 300mA continuously at +85°C ambient, whereas typical SOT-23 LDOs derate to <150mA at the same temperature.
AP7341D-18FS4-7 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):
- 1.8V
- 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
AP7341D-18FS4-7 FAQ
1.How can I place an order for AP7341D-18FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7341D-18FS4-7 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 AP7341D-18FS4-7 reliable?
The price and inventory of AP7341D-18FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341D-18FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7341D-18FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341D-18FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7341D-18FS4-7?
AP7341D-18FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7341D-18FS4-7 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 AP7341D-18FS4-7?
For technical support, including AP7341D-18FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341D-18FS4-7 requirements.
6.How does Aetrix verify that AP7341D-18FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7341D-18FS4-7 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 AP7341D-18FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7341D-18FS4-7?
All AP7341D-18FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341D-18FS4-7, 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 AP7341D-18FS4-7 part is unused and in its original packaging.
Return procedure for AP7341D-18FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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