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Diodes Incorporated AP7343D-32W5-7
- Part No.:
- AP7343D-32W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343D-32W5-7.pdf
- Description:
- IC REG LINEAR 3.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,070
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Product details
Overview
AP7343D-32W5-7 from Diodes Incorporated is a 300mA, 3.2V fixed-output low-dropout linear regulator with ±1% output 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 - optimized for RF supply rails in compact portable electronics.
For engineers reviewing the AP7343D-32W5-7 datasheet, AP7343D-32W5-7 pinout, AP7343D-32W5-7 application, or AP7343D-32W5-7 equivalent, key selection criteria include its 35µA quiescent current, 0.22–0.29V dropout at 300mA (for 3.2V output), SOT25 package footprint, and integrated discharge function enabled by the "D" suffix.
Technical Context
The AP7343D-32W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with auto-discharge capability. Its enable input (EN) supports active-high logic control with 1.3V minimum high threshold and 0.5V maximum low threshold.
It operates across 1.7V–5.25V input range and delivers stable 3.2V output with ±1% accuracy over -40°C to +85°C ambient. Thermal shutdown activates at +150°C with +20°C hysteresis, and short-circuit current is clamped to ~55mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2V ±1% at +25°C; maintains regulation down to 1.7V input |
| Max Output Current | 300mA continuous; fold-back short-circuit limit ~55mA |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 60µVrms (10Hz–100kHz) - suitable for noise-sensitive RF and analog circuits |
| Quiescent Current | 35µA typical - enables ultra-low-power standby operation |
| Dropout Voltage | 0.22V (typ) at 300mA - allows operation with minimal VIN–VOUT margin |
| Enable Threshold | EN high ≥1.3V, low ≤0.5V - compatible with 1.8V/3.3V GPIO without level shift |
Pinout & Package
AP7343D-32W5-7 is packaged in SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm), with exposed pad for thermal enhancement. Pin 1 = VIN, Pin 2 = GND, Pin 3 = EN, Pin 4 = VOUT, Pin 5 = NC (no connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VIN) | Input Power Supply | Accepts 1.7–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin |
| Pin 2 (GND) | Ground Reference | Primary return path; must connect to low-impedance ground plane to minimize noise and thermal resistance |
| Pin 3 (EN) | Enable Control Input | Active-high logic: ≥1.3V enables regulator; ≤0.5V disables and activates output discharge (via internal 30Ω NMOS) |
| Pin 4 (VOUT) | Regulated Output | Delivers 3.2V ±1%; requires ≥1µF ceramic output capacitor near load for stability and transient response |
| Pin 5 (NC) | No Connection | Not internally bonded; must remain unconnected per datasheet - no routing or grounding allowed |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Discharge Function | Internal 30Ω NMOS discharges VOUT when EN = low - eliminates residual voltage in power sequencing |
| Low-Noise Regulation | 60µVrms noise floor enables clean biasing of LNA, VCO, and ADC reference circuits |
| High PSRR at Low Frequency | 75dB @ 1kHz - effectively filters ripple from buck converter outputs feeding VIN |
| Ultra-Low Quiescent Current | 35µA typ - extends battery life in always-on sensor nodes and wearable devices |
| Thermal Protection | +150°C shutdown with +20°C hysteresis - prevents damage during sustained overload or poor PCB heatsinking |
Applications
| RF Power Amplifier Bias | Camera Module Core Supply |
|---|---|
|
Use Scenario: Providing stable 3.2V bias to GaAs pHEMT power amplifiers in LTE/Wi-Fi front-end modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering clean DC bias independent of noisy switcher output. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in transmit paths. |
Use Scenario: Powering image signal processor (ISP) and CIS analog core in smartphone camera subsystems. IC Role / Device Role / Timing Role: Fixed 3.2V regulator with fast load transient response supporting burst-mode pixel readout. Use Value: 0.22V dropout and 35µA IQ enable efficient use of single-cell Li-ion (3.0–4.2V) while minimizing self-heating. |
| Wireless Adapter Baseband | Portable Media Player Audio Codec |
|
Use Scenario: Supplying 3.2V to baseband processors and transceivers in USB Wi-Fi/BT dongles. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling host-driven power gating during sleep states. Use Value: EN pin compatibility with 1.8V/3.3V logic and 0.01µA standby current reduce system-level leakage. |
Use Scenario: Delivering low-noise 3.2V to stereo audio DACs and headphone amplifiers in MP3 players. IC Role / Device Role / Timing Role: High-accuracy (±1%) LDO ensuring consistent full-scale output and THD performance. Use Value: ±1% VOUT tolerance and <30ppm/°C tempco maintain SNR >105dB across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3202E/MB | 300mA, 3.2V, ±2% accuracy, 65dB PSRR @ 1kHz, no auto-discharge | Lacks integrated discharge; requires external circuitry for VOUT bleed-down | Preferred where board space permits discrete discharge solution and lower cost is prioritized |
| Torex XC6210B322MR-G | 300mA, 3.2V, ±1% accuracy, 70dB PSRR @ 1kHz, 45µA IQ, no discharge | Higher quiescent current; no built-in discharge path | Selected when thermal budget allows slightly higher IQ and discharge is managed externally |
Compared with MCP1703T-3202E/MB and XC6210B322MR-G, the AP7343D-32W5-7 uniquely combines ±1% accuracy, 75dB PSRR, 60µVrms noise, and integrated 30Ω discharge - reducing BOM count and improving power sequencing reliability in space-constrained RF designs.
Availability
AP7343D-32W5-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, camera module core supplies, wireless adapter baseband power, and portable media player audio codec regulation requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for AP7343D-32W5-7 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 targets portable and battery-powered systems requiring ultra-low-noise, high-PSRR, and enable-controlled LDOs - with variants spanning 0.9V–3.6V outputs and automotive-qualified (AP7343Q) derivatives.
FAQ
What is the purpose of the NC pin (Pin 5) on the AP7343D-32W5-7 SOT25 package?
Pin 5 is a no-connect terminal - not internally bonded and electrically isolated. It must remain unconnected in PCB layout; routing or grounding this pin violates the device's thermal and electrical specifications and may cause instability or premature failure. The exposed pad (EP) serves thermal dissipation and should be connected to GND via multiple vias.
Does the "D" in AP7343D-32W5-7 indicate a different package or a functional variant?
The "D" denotes the auto-discharge variant: when EN is pulled low, an internal 30Ω NMOS connects VOUT to GND, actively discharging output capacitance. This differs from non-D versions (e.g., AP7343-32W5-7), which float VOUT upon disable. The package remains SOT25 (W5) - no mechanical change.
Can AP7343D-32W5-7 operate with input voltage below 1.7V?
No - 1.7V is the absolute minimum specified input voltage. Operation below this threshold risks loss of regulation, increased dropout, or complete shutdown. At 3.2V output, minimum functional VIN is 3.42V (3.2V + 0.22V typical dropout); actual usable VIN depends on load current and temperature.
How does the AP7343D-32W5-7 handle short-circuit conditions?
Under VOUT-to-GND short, the device limits output current to ~55mA (fold-back) and activates thermal shutdown if junction temperature exceeds +150°C. Recovery is automatic after fault removal and cooldown. This protects both the LDO and downstream circuitry without requiring external current-limit components.
AP7343D-32W5-7 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):
- 3.2V
- 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
AP7343D-32W5-7 FAQ
1.How can I place an order for AP7343D-32W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343D-32W5-7 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-32W5-7 reliable?
The price and inventory of AP7343D-32W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-32W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343D-32W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-32W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343D-32W5-7?
AP7343D-32W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343D-32W5-7 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-32W5-7?
For technical support, including AP7343D-32W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-32W5-7 requirements.
6.How does Aetrix verify that AP7343D-32W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343D-32W5-7 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-32W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343D-32W5-7?
All AP7343D-32W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-32W5-7, 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-32W5-7 part is unused and in its original packaging.
Return procedure for AP7343D-32W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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