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Diodes Incorporated AP7341D-185FS4-7
- Part No.:
- AP7341D-185FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7341D-185FS4-7.pdf
- Description:
- IC REG LINEAR 1.85V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
AP7341D-185FS4-7 from Diodes Incorporated is a 300mA low-dropout linear regulator with fixed 1.85V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and integrated auto-discharge functionality - designed for RF supply rails in space-constrained portable communication devices.
For engineers reviewing the AP7341D-185FS4-7 datasheet, AP7341D-185FS4-7 pinout, AP7341D-185FS4-7 application, or AP7341D-185FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (0.21–0.27V for 1.85V output), EN logic thresholds (0.5V max low, 1.3V min high), thermal pad grounding requirements, and compatibility with 1µF ceramic input/output capacitors.
Technical Context
The AP7341D-185FS4-7 uses a CMOS-based LDO architecture with internal voltage reference, error amplifier, and current-limit circuitry. Its enable input directly controls NMOS pass transistor gate drive, supporting fast turn-on/turn-off transitions and ultra-low standby current (≤1.0µA).
It integrates an auto-discharge path via a 30Ω on-resistance N-channel MOSFET between VOUT and GND when disabled, ensuring rapid output voltage decay to prevent back-powering of downstream circuitry - critical for sequencing-sensitive RF and camera modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±1% over -40°C to +85°C - ensures stable bias for RF transceivers and low-voltage logic without external feedback. |
| Max Output Current | 300mA guaranteed - supports peak loads of Wi-Fi/BT coexistence circuits and image sensor analog blocks. |
| PSRR | 75dB at 1kHz - suppresses switching noise from PMICs or DC-DC converters feeding adjacent digital domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise degradation in local oscillator chains and ADC reference paths. |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor nodes and standby-mode wireless peripherals. |
| Dropout Voltage | 0.21–0.27V at 300mA (1.85V output) - enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (3.2V min) with margin. |
| Enable Thresholds | VEN(HI) ≥1.3V, VEN(LO) ≤0.5V - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
The AP7341D-185FS4-7 is housed in a 1.0mm × 1.0mm X2-DFN1010-4 package with exposed thermal pad (pin 5), optimized for minimal PCB footprint and high thermal efficiency in thin-profile handheld designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated Power Output | Delivers clean 1.85V to load; requires low-ESR ceramic capacitor (≥1µF) placed within 2mm for stability. |
| 2 (GND) | Analog/Digital Ground Reference | Common return for input/output capacitors and thermal pad; must connect to solid ground plane to minimize noise coupling. |
| 3 (EN) | Active-High Enable Control | Drives internal pass transistor; floating state disables regulator - tie to VIN if always-on operation required. |
| 4 (VIN) | Unregulated Input Supply | Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress supply glitches. |
| Thermal Pad | Thermal Dissipation Path | Exposed copper pad beneath package; must be soldered to ≥100mm² GND copper area for 400mW power dissipation capability. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | 30Ω on-resistance discharge path activates on disable - clears 1.85V rail in <1ms to prevent latch-up in multi-rail systems. |
| Ultra-low noise regulation | 60µVrms broadband noise - meets stringent spectral purity requirements for RF front-end biasing and PLL VCO supplies. |
| High PSRR across frequency | 75dB @1kHz, >50dB up to 100kHz - rejects ripple from switchers operating at 500kHz–2MHz without additional filtering. |
| Wide input voltage range | 1.7V to 5.25V - supports direct connection to battery, USB, or intermediate DC-DC outputs without pre-regulation. |
| Guaranteed 300mA output | Specified across full temperature and line/load conditions - eliminates derating concerns in industrial-grade portable equipment. |
Applications
| RF Transceiver Supply | Camera Sensor Bias |
|---|---|
Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT combo modules requiring ultra-clean 1.85V supply under dynamic transmit/receive load switching. IC Role / Device Role / Timing Role: Primary LDO delivering regulated bias to RF power amplifiers and low-noise amplifiers, synchronized with EN-controlled sleep/wake cycles. Use Value: 60µVrms noise and 75dB PSRR prevent EVM degradation and adjacent channel leakage ratio (ACLR) failure during high-throughput data transmission. | Use Scenario: Providing stable 1.85V core voltage to high-resolution CMOS image sensors during burst capture and video streaming. IC Role / Device Role / Timing Role: Low-noise power source for sensor analog front-end and column ADC drivers, enabled only during active imaging periods. Use Value: Auto-discharge ensures rapid VOUT collapse between frames, eliminating ghosting artifacts caused by residual charge in pixel arrays. |
| Portable Media Player Core | Wireless Adapter Logic Rail |
Use Scenario: Supplying 1.85V to audio codec DSP cores and memory interfaces in battery-powered MP3/voice recorders. IC Role / Device Role / Timing Role: Main system LDO with enable control coordinated with host processor power states to reduce idle power consumption. Use Value: 35µA quiescent current extends playback time by >15% versus standard LDOs, while 0.21V dropout preserves runtime as battery discharges to 3.0V. | Use Scenario: Regulating 1.85V for PCIe/USB-based wireless adapter controller I/O and SerDes termination in compact docking stations. IC Role / Device Role / Timing Role: Secondary LDO isolating noisy host bus power from sensitive adapter PHY circuitry, controlled via platform firmware. Use Value: 1.0mm × 1.0mm DFN package enables placement directly beneath BGA packages, minimizing trace inductance and improving high-frequency PSRR performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361D-185FS4-7 | Higher 600mA output current, identical 1.85V/±1% accuracy and noise specs, same X2-DFN1010-4 package. | Supports higher-current RF front-ends or multi-core SoCs where 300mA headroom is insufficient. | Select when future-proofing for increased load or parallel LDO configurations. |
| MCP1700-1802E/MB | 100mA output, 1.8V fixed (not 1.85V), 65dB PSRR, 37µA IQ, SOT-23-5 package - no auto-discharge. | Limited to ultra-low-power microcontrollers or sensors; lacks discharge and RF-grade noise/PSRR performance. | Choose only for cost-sensitive, non-RF applications where 1.85V precision and fast discharge are unnecessary. |
Compared with AP7341D-185FS4-7, AP7361D-185FS4-7 offers scalable current capacity without sacrificing noise or footprint, while MCP1700-1802E/MB trades performance for cost and simplicity in low-complexity systems - making the AP7341D-185FS4-7 optimal for RF and imaging applications demanding precision, speed, and density.
Availability
AP7341D-185FS4-7 is available at Aetrix Electronics and suitable for RF transceiver supply, camera sensor bias, portable media player core, and wireless adapter logic rail applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7341D-185FS4-7 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 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive RF, imaging, and portable communication subsystems where clean, efficient, and space-constrained regulation is critical.
FAQ
What is the thermal pad connection requirement for AP7341D-185FS4-7?
The exposed thermal pad (pin 5) must be soldered to a minimum 100mm² copper area connected to the PCB ground plane. This provides essential thermal dissipation for the 400mW maximum power rating and ensures stable operation at 300mA output current across -40°C to +85°C ambient temperatures.
Does AP7341D-185FS4-7 require external compensation components?
No. The AP7341D-185FS4-7 is internally compensated and stable with 1.0µF ceramic input and output capacitors. Its design eliminates the need for external resistors or capacitors, reducing BOM count and layout complexity while maintaining phase margin >60° across all operating conditions.
How does the auto-discharge feature behave during enable/disable transitions?
When EN is pulled low, the internal 30Ω N-channel MOSFET connects VOUT to GND, discharging a 1µF output capacitor from 1.85V to <100mV in under 1ms. During enable, the discharge path turns off before the pass transistor activates, preventing shoot-through current and ensuring monotonic VOUT rise.
Can AP7341D-185FS4-7 operate with input voltage below 1.85V?
No. The minimum input voltage is 1.7V, but dropout voltage increases sharply below VOUT + 0.21V. At 1.85V output, operation requires VIN ≥ 2.06V to maintain regulation at 300mA. Below this, the device enters dropout and output voltage drops linearly with input - not suitable for sub-2V battery operation.
AP7341D-185FS4-7 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.42V @ 150mA
- 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-185FS4-7 FAQ
1.How can I place an order for AP7341D-185FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7341D-185FS4-7 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-185FS4-7 reliable?
The price and inventory of AP7341D-185FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341D-185FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7341D-185FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341D-185FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7341D-185FS4-7?
AP7341D-185FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7341D-185FS4-7 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-185FS4-7?
For technical support, including AP7341D-185FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341D-185FS4-7 requirements.
6.How does Aetrix verify that AP7341D-185FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7341D-185FS4-7 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-185FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7341D-185FS4-7?
All AP7341D-185FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341D-185FS4-7, 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-185FS4-7 part is unused and in its original packaging.
Return procedure for AP7341D-185FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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