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Diodes Incorporated AP7343D-28W5-7
- Part No.:
- AP7343D-28W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343D-28W5-7.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7343D-28W5-7 from Diodes Incorporated is a 300mA, 2.8V fixed-output low-dropout linear regulator with high PSRR (75dB at 1kHz), ultra-low output noise (60µVrms, 10Hz–100kHz), ±1% output voltage accuracy, and enable-controlled operation in SOT25 package. It delivers stable power to RF supplies and camera modules in space-constrained portable electronics.
For engineers reviewing the AP7343D-28W5-7 datasheet, AP7343D-28W5-7 pinout, AP7343D-28W5-7 application, or AP7343D-28W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.26–0.34V for 2.8V output), quiescent current (35µA typ), thermal shutdown threshold (+150°C), and EN logic thresholds (0.5V low / 1.3V high).
Technical Context
The AP7343D-28W5-7 integrates a CMOS-based pass transistor, precision voltage reference, error amplifier, current-limit circuit, and thermal shutdown protection. Its enable input (EN) provides precise on/off control with defined logic thresholds and sub-1µA standby current.
It features built-in discharge functionality (denoted by "D" suffix), actively pulling down VOUT during shutdown via a 30Ω internal N-channel MOSFET. This eliminates residual voltage hold-up in systems requiring fast rail collapse, such as multi-rail sequencing or battery-powered sleep modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% - ensures stable bias for RF transceivers and image sensors without external feedback network. |
| Max Output Current | 300mA - supports moderate-power analog/RF blocks in smartphones and wireless adapters. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in low-noise analog front-ends like camera ISPs and audio codecs. |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor or standby communication circuits. |
| Dropout Voltage | 0.26V (typ) at 300mA - enables operation from single-cell Li-ion (3.0V min) or 3.3V rail with margin. |
| Enable Thresholds | VIL ≤ 0.5V, VIH ≥ 1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
| Thermal Shutdown | +150°C with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed pad for thermal enhancement. Pin 1 = VIN, Pin 2 = GND, Pin 3 = EN, Pin 4 = VOUT, Pin 5 = NC (no connection). Exposed pad (EP) must be connected to GND plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input Power Supply | Accepts 1.7V–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| GND (Pin 2) | Power Ground Reference | Primary return path for load current and internal bias; must connect directly to low-impedance ground plane. |
| EN (Pin 3) | Enable Control Input | Active-high logic input; floating state prohibited; drives regulator into <1µA shutdown when pulled ≤0.5V. |
| VOUT (Pin 4) | Regulated Output | Delivers 2.8V ±1% to load; includes internal discharge FET (30Ω) to rapidly discharge external capacitance on disable. |
| NC (Pin 5) | No Connection | Internally unconnected; must remain unconnected in PCB layout to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60µVrms output noise enables clean power for RF synthesizers and high-resolution ADCs without additional filtering. |
| Fast transient response | Stable with 1µF ceramic output capacitor; recovers within ~50µs from 1mA↔300mA load steps (COUT=4.7µF). |
| Integrated discharge FET | 30Ω on-resistance actively discharges VOUT during shutdown - eliminates need for external bleed resistor in sequencing-critical designs. |
| High PSRR across frequency | 75dB @ 1kHz, >60dB up to 100kHz - maintains supply rejection even under high-frequency switching noise from PMICs or buck converters. |
| Wide input range | 1.7V–5.25V operation supports direct connection to Li-ion, USB, or intermediate system rails without pre-regulation. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Providing clean, stable 2.8V bias to LTE/Wi-Fi PA stages in compact mobile modules. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated VCC_PA with minimal ripple-induced EVM degradation. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and maintain ACLR compliance under dynamic load. |
Use Scenario: Powering analog core and PLL circuits of high-speed CMOS image sensors in smartphone cameras. IC Role / Device Role / Timing Role: Precision 2.8V supply for sensor pixel array and timing generator, rejecting digital switching noise. Use Value: ±1% accuracy and low temperature drift (±30ppm/°C) ensure consistent analog gain and exposure linearity across -40°C to +85°C. |
| Wireless Adapter Module Rail | Portable Media Player Audio Codec Supply |
|
Use Scenario: Generating dedicated 2.8V rail for Bluetooth/Wi-Fi SoC I/O and RF sections in USB dongles or IoT edge nodes. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling rapid power cycling of wireless subsystems to reduce average system current. Use Value: 35µA quiescent current and <1µA shutdown current extend battery runtime in intermittent-connection applications. |
Use Scenario: Supplying low-noise 2.8V to stereo audio DAC/ADC and headphone amplifier in portable media players. IC Role / Device Role / Timing Role: Clean analog supply isolating sensitive audio paths from noisy digital processors and display drivers. Use Value: 60µVrms noise floor avoids audible hiss; fast load transient response prevents pop/click during volume transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/MB | 250mA max output, no enable pin, no discharge FET, higher dropout (0.6V @ 250mA) | Lacks active shutdown control and rail collapse; unsuitable for sequenced multi-rail systems | Select only if enable/discharge functionality is unnecessary and load current ≤250mA |
| Torex XC6210B282MR-G | 300mA, 2.8V, 45µA IQ, but no integrated discharge FET and lower PSRR (65dB @ 1kHz) | Requires external discharge resistor; less effective at suppressing high-frequency noise from DC-DC converters | Prefer when cost sensitivity outweighs need for fast rail collapse and superior noise immunity |
Compared with MCP1700T-2802E/MB and XC6210B282MR-G, the AP7343D-28W5-7 uniquely combines 300mA capability, enable control, integrated discharge, 75dB PSRR, and 60µVrms noise - making it optimal for RF and imaging applications demanding both precision and dynamic control.
Availability
AP7343D-28W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, wireless adapter module rails, and portable media player audio codec supply requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AP7343D-28W5-7 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 company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP7343 series belongs to Diodes' high-performance LDO portfolio, designed specifically for battery-powered portable electronics requiring ultra-low noise, high PSRR, and fast enable-controlled power sequencing.
FAQ
What is the function of the NC pin on AP7343D-28W5-7?
Pin 5 is designated NC (No Connection) and is internally unconnected. It must remain unconnected in the PCB layout to prevent unintended coupling or parasitic effects. Connecting it to any net-including ground-may compromise device reliability or electrical performance per the datasheet specification.
Does AP7343D-28W5-7 require an external discharge resistor?
No. The "D" suffix indicates integrated discharge functionality: an internal 30Ω N-channel MOSFET actively pulls VOUT to GND when EN is low. This eliminates the need for external bleed resistors, reduces BOM count, and ensures predictable discharge time (<1ms for 10µF load) without leakage trade-offs.
Can AP7343D-28W5-7 operate with input voltage below 2.8V?
Yes-down to 1.7V minimum input-but output regulation is only guaranteed when VIN ≥ VOUT + dropout voltage. At 300mA load and 2.8V output, typical dropout is 0.26V, so VIN must be ≥3.06V for full regulation. Below that, VOUT drops linearly with VIN minus dropout.
How does thermal performance differ between SOT25 and X2-DFN1010-4 packages?
SOT25 has θJA = 179°C/W; X2-DFN1010-4 (Type B) has θJA = 237°C/W. Despite its smaller footprint, the DFN variant relies more heavily on PCB copper area under the exposed pad for heat dissipation. With identical board layout, SOT25 achieves lower junction temperature rise per watt-critical for sustained 300mA operation in confined spaces.
AP7343D-28W5-7 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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
AP7343D-28W5-7 FAQ
1.How can I place an order for AP7343D-28W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343D-28W5-7 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 AP7343D-28W5-7 reliable?
The price and inventory of AP7343D-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-28W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343D-28W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-28W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343D-28W5-7?
AP7343D-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343D-28W5-7 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 AP7343D-28W5-7?
For technical support, including AP7343D-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-28W5-7 requirements.
6.How does Aetrix verify that AP7343D-28W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343D-28W5-7 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 AP7343D-28W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343D-28W5-7?
All AP7343D-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-28W5-7, 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 AP7343D-28W5-7 part is unused and in its original packaging.
Return procedure for AP7343D-28W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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