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Diodes Incorporated AP7341-33FS4-7
- Part No.:
- AP7341-33FS4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7341-33FS4-7.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
AP7341-33FS4-7 from Diodes Incorporated is a 300mA, 3.3V 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 and portable media subsystems in space-constrained handheld devices.
For engineers reviewing the AP7341-33FS4-7 datasheet, AP7341-33FS4-7 pinout, AP7341-33FS4-7 application, or AP7341-33FS4-7 equivalent, key selection criteria include dropout voltage at 300mA (≤400mV), enable threshold compatibility (VEN(H) ≥1.3V), thermal performance in X2-DFN1010-4, and stability with 1µF ceramic output capacitance.
Technical Context
The AP7341-33FS4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit circuit, and active enable control. Its low RDS(ON) pass element enables high PSRR and minimal dropout across 1.7V–5.25V input range.
It delivers regulated 3.3V output with guaranteed ±1% accuracy over -40°C to +85°C, supports fast load transient response via internal compensation, and includes fold-back short-circuit protection clamping output current to ~55mA during VOUT-to-GND fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at 25°C; ±1.5% over full temperature range - ensures stable core/peripheral rail for 3.3V logic and analog interfaces. |
| Max Output Current | 300mA continuous - sufficient for powering baseband processors, camera ISPs, or RF front-end bias circuits. |
| Dropout Voltage | 300mV typical at 300mA (VOUT = 3.3V) - enables operation from single-cell Li-ion (3.0V min) or 3.3V system rails with margin. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input, critical for RF and audio signal integrity. |
| Output Noise | 60µVrms (10Hz–100kHz) - low enough for noise-sensitive analog blocks like ADC references or PLL VCO supplies. |
| IQ | 35µA typical - extends battery life in always-on sensor or standby modes of portable equipment. |
| Enable Threshold | VEN(H) ≥1.3V, VEN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
AP7341-33FS4-7 uses the X2-DFN1010-4 package (1.0mm × 1.0mm, 0.4mm height), featuring an exposed thermal pad for enhanced PCB heat dissipation. Recommended layout uses large copper area connected to GND under the thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 | VOUT | Regulated 3.3V power output - must be decoupled with 1µF ceramic capacitor placed adjacent to pin and GND. |
| PIN2 | GND | Analog/digital ground reference - requires low-impedance connection to PCB ground plane to minimize noise coupling. |
| PIN3 | EN | Active-high enable input - drives regulator ON/OFF; must not float; tied to VIN if always-on operation required. |
| PIN4 | VIN | Input supply (1.7V–5.25V) - requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB @ 1kHz - maintains clean 3.3V rail despite noisy DC/DC input, reducing need for additional filtering stages. |
| Ultra-Low Noise | 60µVrms (10Hz–100kHz) - eliminates audible hiss in audio codecs and prevents jitter in clock-sensitive peripherals. |
| Low Quiescent Current | 35µA - enables >1-year battery life in IoT sensors operating in deep-sleep cycles with periodic wake-up bursts. |
| Fast Load Transient Response | Stable with 1µF ceramic COUT; <100µs recovery from 1mA↔300mA step - sustains voltage during processor burst-mode operation. |
| Integrated Short-Circuit Protection | Fold-back current limit (~55mA) - prevents thermal runaway during board-level faults without external current-sense components. |
Applications
| Smartphone Baseband Supply | RF Front-End Bias |
|---|---|
|
Use Scenario: Powering application processor I/O banks and memory interfaces in compact smartphone mainboards. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering stable, low-noise voltage to high-speed digital subsystems. Use Value: Enables reliable DDR interface timing by maintaining <±1.5% regulation across temperature and load, minimizing bit-error rates. |
Use Scenario: Providing clean bias to PA drivers and LNA stages in 4G/5G cellular RF modules. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating sensitive RF circuitry from noisy PMIC outputs. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in transmit paths. |
| Portable Camera ISP Core | Wireless Adapter SoC Core |
|
Use Scenario: Supplying image signal processor cores and CIS interface logic in mobile camera modules. IC Role / Device Role / Timing Role: Dedicated 3.3V rail with fast transient response for burst-mode image capture processing. Use Value: <100µs load-step recovery preserves frame synchronization and avoids image artifacts during rapid exposure changes. |
Use Scenario: Powering Wi-Fi/BT combo chip cores in USB dongles and embedded wireless gateways. IC Role / Device Role / Timing Role: Enable-controlled LDO allowing host MCU to power-cycle radio subsystems on demand. Use Value: 35µA IQ and EN-compatible thresholds reduce system standby power to <100µW per radio domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 250mA max output, 6µA IQ, 65dB PSRR @ 1kHz, SOT-23-5 package | Limited current headroom for burst-mode loads; smaller footprint but higher thermal resistance | Prefer when ultra-low IQ dominates over transient performance and current capability |
| Torex XC6206P332MR-G | 300mA, ±2% accuracy, 50dB PSRR @ 1kHz, 100µVrms noise, SOT-25 package | Higher noise and lower PSRR compromise RF/analog performance; larger package increases board area | Acceptable only in cost-sensitive, non-noise-critical digital-only applications |
Compared with MCP1700-3302E/TO and XC6206P332MR-G, AP7341-33FS4-7 uniquely balances 300mA drive, 75dB PSRR, and 60µVrms noise in a 1.0mm² DFN - making it optimal for RF and imaging subsystems where noise, regulation accuracy, and size are jointly constrained.
Availability
AP7341-33FS4-7 is available at Aetrix Electronics and suitable for smartphone baseband supply, RF front-end bias, and portable camera ISP core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7341-33FS4-7 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 AP7341 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-sensitive portable electronics where small size, efficiency, and signal integrity are co-primary design requirements.
FAQ
What is the minimum input voltage required for AP7341-33FS4-7 to maintain regulation at 300mA?
The AP7341-33FS4-7 requires a minimum input voltage of 3.6V to sustain 3.3V output at 300mA load, based on its maximum dropout voltage of 400mV (3.3V + 0.4V). At 150mA, dropout drops to ≤270mV, allowing operation down to ~3.57V input. Input below 1.7V will disable regulation entirely.
Can AP7341-33FS4-7 be used without an enable signal?
Yes - the EN pin can be permanently tied to VIN to force the regulator into always-on mode. This configuration eliminates external control but retains all regulation features. Do not leave EN floating, as it may cause erratic startup or shutdown behavior due to noise susceptibility.
Is an external discharge resistor needed for AP7341-33FS4-7?
No - the AP7341-33FS4-7 is the non-discharge version (no 'D' suffix), meaning it lacks internal auto-discharge. If rapid VOUT discharge is required upon shutdown, an external 10kΩ–100kΩ resistor from VOUT to GND must be added; otherwise, residual charge may persist on downstream capacitance.
What is the recommended PCB layout practice for thermal management?
Use a ≥2mm² copper pour connected to PIN2 (GND) and the exposed thermal pad, routed to internal ground planes. Avoid routing signal traces under the device. Place input/output capacitors within 2mm of their respective pins using 0.3mm-wide traces, and ensure GND connections use multiple vias to inner layers to minimize impedance.
AP7341-33FS4-7 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):
- 3.3V
- 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
AP7341-33FS4-7 FAQ
1.How can I place an order for AP7341-33FS4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7341-33FS4-7 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 AP7341-33FS4-7 reliable?
The price and inventory of AP7341-33FS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7341-33FS4-7 is usually 5 days.
3.What payment methods are accepted for AP7341-33FS4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7341-33FS4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7341-33FS4-7?
AP7341-33FS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7341-33FS4-7 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 AP7341-33FS4-7?
For technical support, including AP7341-33FS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7341-33FS4-7 requirements.
6.How does Aetrix verify that AP7341-33FS4-7 is sourced from the original manufacturer or authorized distributors?
All AP7341-33FS4-7 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 AP7341-33FS4-7 meets industry standards.
7.What is the process for return or replacement of AP7341-33FS4-7?
All AP7341-33FS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7341-33FS4-7, 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 AP7341-33FS4-7 part is unused and in its original packaging.
Return procedure for AP7341-33FS4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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