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Diodes Incorporated AP7343-105W5-7
- Part No.:
- AP7343-105W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343-105W5-7.pdf
- Description:
- IC REG LINEAR 1.05V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
AP7343-105W5-7 from Diodes Incorporated is a 300mA, 1.05V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Built on a CMOS process, it features enable control, thermal shutdown, and short-circuit protection-designed for RF supply rails in space-constrained portable electronics.
For engineers reviewing the AP7343-105W5-7 datasheet, AP7343-105W5-7 pinout, AP7343-105W5-7 application, or AP7343-105W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.49V typ.), quiescent current (35µA), EN logic thresholds (0.5V low / 1.3V high), and SOT25 package thermal resistance (179°C/W).
Technical Context
The AP7343-105W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor to deliver stable 1.05V output across 1.7V–5.25V input range. Its architecture supports fast load transient response (<100µs settling) and enables seamless power sequencing via active-high EN pin.
Thermal protection triggers at +150°C with +20°C hysteresis; short-circuit current is limited to ~55mA. The device operates over –40°C to +85°C ambient and supports both discharge (AP7343D) and non-discharge variants-this part (no "D" suffix) lacks auto-discharge functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05V ±1% at +25°C; ensures precise biasing for low-voltage RF ICs and memory interfaces. |
| Max Output Current | 300mA guaranteed; supports moderate-power subsystems like camera ISPs or Bluetooth SoCs without derating. |
| Dropout Voltage | 0.49V (typ) at 300mA, VIN ≥ 1.7V; enables operation from single-cell Li-ion (3.0V min) down to 1.55V input. |
| PSRR | 75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding noisy power domains. |
| Output Noise | 60µVrms (10Hz–100kHz); meets stringent noise requirements for RF front-end LNA and VCO power supplies. |
| Quiescent Current | 35µA (typ); extends battery life in always-on sensor nodes and standby-mode peripherals. |
| Enable Threshold | EN low ≤0.5V / high ≥1.3V; compatible with 1.8V and 3.3V GPIOs without level-shifting. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm) package with exposed thermal pad (EP). Pin 1 = VIN, Pin 2 = GND, Pin 3 = EN, Pin 4 = VOUT, Pin 5 = NC. EP must be connected to PCB ground plane for optimal thermal performance (RθJB = 79.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 1.7V–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| GND (Pin 2) | Ground Reference | Primary return path for load current and internal circuits; connects to system ground plane. |
| EN (Pin 3) | Enable Control | Active-high logic input; floating state prohibited-tie to VIN if always-on operation required. |
| VOUT (Pin 4) | Regulated Output | Delivers 1.05V ±1%; requires ≥1µF ceramic output capacitor near load for stability and transient response. |
| NC (Pin 5) | No Connection | Internally unconnected; must remain unconnected in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz improves immunity to ripple from upstream switching regulators in mixed-signal systems. |
| Low Quiescent Current | 35µA enables >1-year battery life in coin-cell-powered IoT sensors operating at 10µA average load. |
| Thermal Shutdown | +150°C trip with +20°C hysteresis prevents permanent damage during sustained overload or poor heatsinking. |
| Short-Circuit Protection | Limits output current to ~55mA during VOUT-to-GND fault, protecting both regulator and downstream circuitry. |
| Wide Input Range | 1.7V–5.25V supports direct connection to Li-ion, Li-Po, or USB-powered rails without pre-regulation. |
Applications
| RF Power Supply | Camera Module Bias |
|---|---|
|
Use Scenario: Providing clean 1.05V bias to RF transceiver LNA and mixer stages in 5G mmWave modules. IC Role / Device Role / Timing Role: Low-noise local power rail generator ensuring minimal phase noise degradation in VCO and PLL circuits. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM conversion and maintain EVM <2.5% under dynamic RF load. |
Use Scenario: Supplying image signal processor (ISP) core voltage in smartphone dual-camera subsystems. IC Role / Device Role / Timing Role: Stable 1.05V source enabling sub-10ns timing margins for MIPI CSI-2 pixel clock synchronization. Use Value: ±1% accuracy and <100µs load transient recovery preserve image integrity during rapid exposure mode switching. |
| Bluetooth LE SoC Core | Wearable Sensor Hub |
|
Use Scenario: Powering ARM Cortex-M0+ core and BLE radio in ultra-low-power hearables. IC Role / Device Role / Timing Role: Always-on LDO supplying regulated 1.05V to digital logic while supporting deep-sleep current <1µA. Use Value: 35µA quiescent current extends battery runtime to 14 days per charge in typical usage profiles. |
Use Scenario: Delivering precision 1.05V to MEMS accelerometer/gyroscope ASIC in fitness trackers. IC Role / Device Role / Timing Role: Low-drift voltage reference for analog front-end amplifiers and ADC bias networks. Use Value: ±30ppm/°C temperature coefficient maintains <0.5% gain error across –20°C to +60°C wearable operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-105I/TT | 250mA max output, 6µA IQ, 1.05V ±2% accuracy, SOT23-5 package | Lower current capability and looser accuracy; suitable only for sub-200mA sensor biasing | Select when ultra-low IQ dominates over PSRR/noise requirements and load current ≤250mA |
| Torex XC6210B105MR-G | 300mA, 1.05V ±2%, 70dB PSRR @1kHz, 40µVrms noise, SOT25 package | Higher noise floor and lower PSRR reduce suitability for RF-sensitive designs | Prefer for cost-sensitive industrial controls where RF performance is non-critical |
Compared with MCP1700T-105I/TT and XC6210B105MR-G, the AP7343-105W5-7 delivers superior RF-grade noise suppression (60µVrms vs. ≥40µVrms) and tighter output accuracy (±1% vs. ±2%), making it the optimal choice for high-fidelity wireless and imaging subsystems demanding strict voltage regulation.
Availability
AP7343-105W5-7 is available at Aetrix Electronics and suitable for RF power supplies, camera module biasing, Bluetooth LE SoC cores, and wearable sensor hubs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7343-105W5-7 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 AP7343 series belongs to Diodes' high-PSRR, low-noise LDO portfolio-engineered specifically for noise-sensitive analog and RF subsystems in portable communications equipment where compact size and battery efficiency are critical.
FAQ
What is the minimum input voltage required for stable 1.05V output at 300mA?
The AP7343-105W5-7 requires VIN ≥ 1.54V (1.05V + 0.49V dropout) for full 300mA output. Per datasheet specifications, the absolute minimum VIN is 1.7V across temperature, ensuring guaranteed performance including line regulation and PSRR over –40°C to +85°C ambient.
Can the EN pin be left unconnected if always-on operation is needed?
No-EN must never float. For continuous operation, tie EN directly to VIN. Leaving EN unconnected risks erratic turn-on behavior due to noise coupling, potentially causing output oscillation or intermittent dropout during system startup or ESD events.
Is an external discharge FET required when using AP7343-105W5-7?
No. This part (no "D" suffix) is the non-discharge variant. If rapid VOUT discharge during shutdown is required-for example, to meet system-level power sequencing specs-a discrete FET or AP7343D-105W5-7 must be used instead.
What is the recommended output capacitor value and type for optimal stability?
A 1µF X5R/X7R ceramic capacitor with ≤100mΩ ESR, placed within 2mm of VOUT and GND pins, ensures stability across all loads. For high-dynamic applications (e.g., burst-mode RF transmission), add a 4.7µF bulk capacitor in parallel to reduce peak droop during 300mA transients.
AP7343-105W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 1.05V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 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:
- SOT-25
AP7343-105W5-7 FAQ
1.How can I place an order for AP7343-105W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343-105W5-7 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 AP7343-105W5-7 reliable?
The price and inventory of AP7343-105W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-105W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343-105W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-105W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343-105W5-7?
AP7343-105W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343-105W5-7 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 AP7343-105W5-7?
For technical support, including AP7343-105W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-105W5-7 requirements.
6.How does Aetrix verify that AP7343-105W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343-105W5-7 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 AP7343-105W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343-105W5-7?
All AP7343-105W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-105W5-7, 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 AP7343-105W5-7 part is unused and in its original packaging.
Return procedure for AP7343-105W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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