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Diodes Incorporated AP7343D-13W5-7
- Part No.:
- AP7343D-13W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343D-13W5-7.pdf
- Description:
- IC REG LINEAR 1.3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
AP7343D-13W5-7 from Diodes Incorporated is a 300mA low-dropout linear regulator with fixed 1.3V output, high PSRR (75dB at 1kHz), ultra-low noise (60µVrms, 10Hz–100kHz), and ±1% output voltage accuracy over temperature. It features CMOS-based architecture, enable control, thermal shutdown, and short-circuit protection - deployed in portable RF supplies and camera power rails where stable low-noise biasing is critical.
For engineers reviewing the AP7343D-13W5-7 datasheet, AP7343D-13W5-7 pinout, AP7343D-13W5-7 application, or AP7343D-13W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.39V typ. for 1.3V output in SOT25), EN logic thresholds (0.5V low / 1.3V high), and discharge functionality enabled by the "D" suffix - essential for fast VOUT ramp-down in battery-powered systems.
Technical Context
The AP7343D-13W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and thermal shutdown into a single CMOS LDO architecture. Its enable input (EN) controls operation with rail-to-rail compatible logic thresholds and sub-1µA standby current when disabled.
It delivers regulated 1.3V output from an input range of 1.7V to 5.25V, with dropout voltage as low as 0.39V at 300mA load (SOT25 package). The built-in auto-discharge function (indicated by "D") actively pulls VOUT to GND during shutdown via a 30Ω internal N-channel MOSFET, eliminating external discharge circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.3V ±1% at +25°C; maintains regulation across –40°C to +85°C ambient. |
| Max Output Current | 300mA guaranteed - supports sustained loads in RF transceivers and image sensor bias rails. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog supply for ADCs, PLLs, and RF front-ends. |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor nodes and low-power wake-up circuits. |
| Dropout Voltage | 0.39V max at 300mA (SOT25) - allows operation from single-cell Li-ion (3.0V min) down to ~1.7V input. |
| Enable Thresholds | VEN(HI) ≥ 1.3V, VEN(LO) ≤ 0.5V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Auto-Discharge | Enabled ('D' suffix); 30Ω on-resistance discharges VOUT in <100µs - prevents leakage-induced system hang. |
Pinout & Package
AP7343D-13W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), with pin 4 as VIN, pin 3 as EN, pin 2 as GND, and pin 1 as VOUT. The fifth pin (EP) is an exposed thermal pad, recommended to be connected to a large GND copper area for thermal dissipation but not used as primary GND return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 4) | Power Input | Accepts 1.7V–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| EN (Pin 3) | Enable Control | Active-high logic input; must be driven - never left floating; enables fast turn-on/turn-off sequencing. |
| GND (Pin 2) | Ground Reference | Primary signal and power ground; connects to PCB ground plane to minimize impedance and noise coupling. |
| VOUT (Pin 1) | Regulated Output | Delivers stable 1.3V; requires ≥1µF ceramic output capacitor placed near load for transient stability. |
| EP (Exposed Pad) | Thermal Interface | Not electrically functional; soldered to thermal copper pour for junction-to-board conduction (RθJB = 79.2°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Output Noise | 60µVrms (10Hz–100kHz) - preserves SNR in RF receivers and high-resolution analog signal chains. |
| High PSRR at Low Frequencies | 75dB @ 1kHz - rejects ripple from buck converter switching frequencies and their harmonics. |
| Integrated Auto-Discharge | 30Ω N-MOSFET between VOUT and GND - eliminates need for external discharge resistor in portable designs. |
| Wide Input Range | 1.7V–5.25V - supports direct connection to Li-ion, Li-Po, or USB-powered systems without pre-regulation. |
| ±1% Output Accuracy | Over full temperature and line/load conditions - ensures reliable operation of 1.3V I/O domains and core logic. |
| Low Quiescent Current | 35µA typical - reduces no-load power loss in battery-backed real-time clocks and sensor hubs. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Providing clean, stable 1.3V bias to GaAs pHEMT or SiGe HBT RF power amplifiers in 4G/5G modules. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated VCC_PA with minimal phase noise contribution to transmit chain. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation under dynamic load. |
Use Scenario: Powering the digital core and analog pixel array of high-speed CMOS image sensors in smartphones. IC Role / Device Role / Timing Role: Primary 1.3V supply for sensor logic, ADC reference, and timing controller with fast load transient response. Use Value: 300mA capability and <100µs discharge time ensure glitch-free frame capture and rapid power cycling. |
| Wireless Adapter Baseband IC | Portable Media Player Audio Codec |
|
Use Scenario: Supplying 1.3V to baseband processors in Wi-Fi 6/6E and Bluetooth LE SoCs within compact M.2 adapters. IC Role / Device Role / Timing Role: Local point-of-load regulator with enable control synchronized to host sleep/wake states. Use Value: 35µA quiescent current and EN-driven shutdown reduce standby power to <1µW per adapter. |
Use Scenario: Delivering ultra-low-noise 1.3V to stereo audio codecs in portable media players and wireless earbuds. IC Role / Device Role / Timing Role: Dedicated LDO for DAC/ADC analog sections, isolated from noisy digital supply domains. Use Value: Sub-60µVrms noise floor preserves >110dB THD+N performance without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361D-13SAG-7 | Higher output current (600mA), same 1.3V output, identical SOT25 package and discharge function. | Better suited for multi-rail SoC power domains requiring higher peak current headroom. | Select when load transients exceed 300mA or future-proofing for higher-current derivatives is required. |
| MCP1826T-1302E/DB | 1.3V fixed output, 500mA rating, no auto-discharge, DFN-8 package (2mm × 2mm), higher quiescent current (65µA). | Lacks integrated discharge; requires external circuit for VOUT ramp-down - increases BOM count and layout complexity. | Choose only if discharge is unnecessary and DFN-8 footprint compatibility is mandatory for existing board reuse. |
Compared with AP7343D-13W5-7, AP7361D-13SAG-7 offers double the current capacity without sacrificing noise or PSRR, while MCP1826T-1302E/DB trades discharge functionality and lower IQ for marginally higher output current - making AP7343D-13W5-7 optimal for space-constrained, battery-sensitive 300mA applications requiring fast shutdown.
Availability
AP7343D-13W5-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, CMOS image sensor core supplies, wireless adapter baseband ICs, and portable media player audio codecs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AP7343D-13W5-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7343 series belongs to Diodes' high-PSRR, low-noise LDO product line, designed specifically for noise-sensitive portable electronics where battery efficiency, small footprint, and fast transient response are critical design constraints.
FAQ
What is the purpose of the 'D' in AP7343D-13W5-7?
The "D" suffix denotes integrated auto-discharge functionality: when EN is pulled low, a 30Ω internal N-channel MOSFET actively discharges the VOUT node to GND. This eliminates residual voltage that could cause latch-up or false wake-up in downstream logic, and removes the need for external discharge resistors - saving board space and BOM cost in portable designs.
Can AP7343D-13W5-7 operate from a single-cell Li-ion battery?
Yes. With a minimum input voltage of 1.7V and a 1.3V output, the device maintains regulation down to ~1.69V input (accounting for 0.39V max dropout at 300mA). This supports operation across the full discharge curve of a standard 3.0–3.6V nominal Li-ion cell, including deep discharge states below 2.8V, without requiring intermediate buck conversion.
How does the SOT25 package affect thermal performance compared to X2-DFN1010-4?
The SOT25 package has a lower junction-to-ambient thermal resistance (179°C/W vs. 237°C/W for X2-DFN1010-4), enabling higher continuous power dissipation at the same ambient temperature. Its exposed pad (EP) provides a robust thermal path to the PCB, and its larger footprint improves manufacturability in high-volume SMT assembly - making it preferred for thermally demanding 300mA applications.
Is AP7343D-13W5-7 compliant with automotive AEC-Q100 standards?
No. AP7343D-13W5-7 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive applications, Diodes offers the AP7343Q variant - a separate, fully qualified part with extended temperature range (–40°C to +125°C), enhanced ESD robustness (>2kV HBM), and PPAP documentation support.
AP7343D-13W5-7 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):
- 1.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.58V @ 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-13W5-7 FAQ
1.How can I place an order for AP7343D-13W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343D-13W5-7 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-13W5-7 reliable?
The price and inventory of AP7343D-13W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-13W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343D-13W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-13W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343D-13W5-7?
AP7343D-13W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343D-13W5-7 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-13W5-7?
For technical support, including AP7343D-13W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-13W5-7 requirements.
6.How does Aetrix verify that AP7343D-13W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343D-13W5-7 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-13W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343D-13W5-7?
All AP7343D-13W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-13W5-7, 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-13W5-7 part is unused and in its original packaging.
Return procedure for AP7343D-13W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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