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Diodes Incorporated AP7343-31W5-7
- Part No.:
- AP7343-31W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343-31W5-7.pdf
- Description:
- IC REG LINEAR 3.1V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7343-31W5-7 from Diodes Incorporated is a 300mA, 3.1V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Built on CMOS process, it features enable control, thermal shutdown, and short-circuit protection-designed for RF supply rails in compact portable electronics.
For engineers reviewing the AP7343-31W5-7 datasheet, AP7343-31W5-7 pinout, AP7343-31W5-7 application, or AP7343-31W5-7 equivalent, key selection criteria include its 1.7V–5.25V input range, 35µA quiescent current, SOT25 package footprint, and guaranteed 300mA output under low dropout conditions (≤290mV at 3.1V/300mA).
Technical Context
The AP7343-31W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with CMOS control logic. Its enable input (EN) provides precise on/off control with defined thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V), and internal thermal shutdown activates at +150°C with +20°C hysteresis.
It delivers stable regulation across –40°C to +85°C ambient, supports ceramic output capacitors as low as 1µF, and maintains <30mV load regulation (1mA–300mA) and 0.02%/V line regulation-enabling robust performance in battery-powered RF and imaging subsystems where supply ripple and transient response are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1V ±1% at +25°C; ensures stable bias for 3.3V-tolerant RF ICs without external feedback network. |
| Max Output Current | 300mA continuous; sufficient for powering RF transceivers, camera ISPs, or baseband processors in handheld devices. |
| Dropout Voltage | 220–290mV at 300mA (SOT25); enables operation down to VIN = 3.32V, extending battery runtime in single-cell Li-ion systems. |
| PSRR | 75dB at 1kHz; suppresses switching noise from DC-DC converters feeding the LDO input, preserving signal integrity in sensitive analog/RF stages. |
| Output Noise | 60µVrms (10Hz–100kHz); minimizes phase noise contribution in VCO/PLL power rails and ADC reference supplies. |
| Quiescent Current | 35µA typical; reduces standby power loss in always-on sensor or connectivity modules. |
| Enable Threshold | VIH ≥ 1.3V, VIL ≤ 0.5V; compatible with 1.8V/3.3V GPIOs for host-controlled power sequencing. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm) package with exposed thermal pad (EP) recommended to be connected to GND plane for optimal thermal dissipation (RθJA = 179°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 1.7V–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress input transients. |
| 2 (GND) | Ground Reference | Primary return path for load current and internal circuitry; must connect directly to low-impedance PCB ground plane. |
| 3 (EN) | Enable Control Input | Active-high logic input; floating state prohibited-tie to VIN if always-on operation required. |
| 4 (VOUT) | Regulated Output | Delivers 3.1V ±1%; requires ≥1µF ceramic output capacitor near pin to ensure stability and transient response. |
| 5 (EP) | Thermal Pad | Not electrically functional; soldered to GND copper area to reduce junction temperature rise by up to 40°C at full load. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz improves immunity to coupled noise from PMIC switchers-critical for clean RF supply rails. |
| Low Output Noise | 60µVrms (10Hz–100kHz) prevents jitter degradation in clock-sensitive circuits like ADCs and high-speed interfaces. |
| Ultra-Low Quiescent Current | 35µA enables >1-year battery life in always-on IoT sensors powered by coin cells or small Li-ion packs. |
| Thermal Shutdown Protection | +150°C trip with +20°C hysteresis prevents permanent damage during sustained overload or poor PCB thermal design. |
| Short-Circuit Current Limit | ~60mA fold-back limit protects device and upstream source during output fault-no external current-sense resistor needed. |
Applications
| RF Transceiver Power | Camera Image Signal Processor |
|---|---|
Use Scenario: Powering 2.4GHz/5GHz Wi-Fi/BT SoCs requiring ultra-clean 3.1V bias under dynamic transmit/receive load steps. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, fast-transient VDD_RF to transceiver analog front-end and synthesizer blocks. Use Value: 75dB PSRR and 60µVrms noise prevent EVM degradation and phase noise increase during high-power TX bursts. |
Use Scenario: Supplying image signal processor core and analog pixel interface in smartphone rear cameras with dual-ISP architectures. IC Role / Device Role / Timing Role: Dedicated LDO for ISP digital core domain, enabling independent voltage scaling and noise isolation from system PMIC. Use Value: 300mA capability supports burst-mode processing; 35µA IQ extends standby time between frame captures. |
| Portable Media Player Audio Codec | Wireless Headset DAC/Amplifier |
Use Scenario: Providing regulated 3.1V to stereo audio codec in MP4 players with OLED display and SD card interface. IC Role / Device Role / Timing Role: Low-noise analog supply rail for codec's DAC, headphone driver, and PLL reference circuitry. Use Value: 60µVrms noise ensures THD+N < –95dB; dropout <290mV allows direct use of single-cell Li-ion (3.0–4.2V). |
Use Scenario: Biasing Class-D amplifier and Bluetooth audio DSP in true wireless stereo earbuds with space-constrained PCB layout. IC Role / Device Role / Timing Role: Compact-area LDO replacing larger TDFN alternatives to meet strict 2.5×2.5mm board real estate limits. Use Value: SOT25 footprint (2.9×2.8mm) saves >35% board area vs. standard SOT23; EN pin enables firmware-controlled power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-3102E/TO | 300mA, 3.1V, ±2% accuracy, 65dB PSRR @1kHz, 30µA IQ, TO-252 package (6.5×6.1mm) | Larger thermal mass but higher power dissipation margin; lacks enable pin | Prefer when board space permits larger package and enable control is unnecessary. |
| Torex XC6210B312MR-G | 300mA, 3.1V, ±1% accuracy, 70dB PSRR @1kHz, 45µA IQ, SOT25-compatible USP-6B package (1.8×2.0mm) | Smaller footprint than SOT25 but lower thermal performance (RθJA = 250°C/W); no integrated thermal shutdown | Prefer for ultra-dense layouts where thermal load is light and external thermal monitoring exists. |
Compared with MCP1703-3102E/TO and XC6210B312MR-G, the AP7343-31W5-7 uniquely balances SOT25 manufacturability, integrated enable and thermal protection, and best-in-class 75dB PSRR-making it optimal for RF-critical, space-constrained portable designs requiring production-ready reliability.
Availability
AP7343-31W5-7 is available at Aetrix Electronics and suitable for RF transceiver power, camera ISP biasing, portable media player audio codecs, and wireless headset amplifier applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for AP7343-31W5-7 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 solutions for power management, signal integrity, and connectivity applications.
The AP7343 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for low-noise, high-PSRR power delivery in battery-powered portable electronics-including smartphones, tablets, and wearables.
FAQ
What is the minimum input voltage required for stable 3.1V output at 300mA?
The AP7343-31W5-7 requires VIN ≥ 3.32V to maintain regulation at 300mA load, based on its maximum dropout voltage of 290mV (3.1V + 0.29V). Below this, output voltage drops linearly with input; operation down to 1.7V is supported only at reduced load currents per the dropout vs. IOUT curves.
Can the EN pin be left unconnected if always-on operation is desired?
No-the EN pin must never be left floating. For always-on operation, tie EN directly to VIN using a low-impedance connection. Floating EN causes undefined behavior due to internal leakage paths and may result in erratic startup or unintended shutdown.
Is an output capacitor mandatory, and what value is recommended?
Yes-an output capacitor is mandatory for stability and transient response. A 1µF X5R/X7R ceramic capacitor placed within 2mm of VOUT and GND pins is the minimum recommendation; for high-dynamic loads (e.g., RF burst transmission), 4.7µF is preferred to limit output voltage deviation to <50mV.
Does AP7343-31W5-7 include reverse-current protection?
No-the AP7343-31W5-7 does not integrate reverse-current blocking. If the output voltage exceeds the input (e.g., during hot-swap or backup battery scenarios), current can flow backward from VOUT to VIN through the pass transistor's body diode. An external Schottky diode in series with VIN is required for reverse-current prevention.
AP7343-31W5-7 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):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 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
AP7343-31W5-7 FAQ
1.How can I place an order for AP7343-31W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343-31W5-7 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 AP7343-31W5-7 reliable?
The price and inventory of AP7343-31W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-31W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343-31W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-31W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343-31W5-7?
AP7343-31W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343-31W5-7 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 AP7343-31W5-7?
For technical support, including AP7343-31W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-31W5-7 requirements.
6.How does Aetrix verify that AP7343-31W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343-31W5-7 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 AP7343-31W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343-31W5-7?
All AP7343-31W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-31W5-7, 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 AP7343-31W5-7 part is unused and in its original packaging.
Return procedure for AP7343-31W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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