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Diodes Incorporated AP7343D-09W5-7
- Part No.:
- AP7343D-09W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343D-09W5-7.pdf
- Description:
- IC REG LINEAR 0.9V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,549
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Product details
Overview
AP7343D-09W5-7 from Diodes Incorporated is a 300mA, 0.9V fixed-output low-dropout linear regulator with high PSRR (75dB at 1kHz), ultra-low output noise (60µVrms, 10Hz–100kHz), and ±1% output voltage accuracy over temperature. Built on CMOS process, it features enable control, thermal shutdown, short-circuit protection, and operates from 1.7V to 5.25V input. It powers sensitive RF supplies and camera modules in space-constrained portable devices.
For engineers reviewing the AP7343D-09W5-7 datasheet, AP7343D-09W5-7 pinout, AP7343D-09W5-7 application, or AP7343D-09W5-7 equivalent, key selection criteria include dropout voltage at 300mA (0.51V typ. for 0.9V output), quiescent current (35µA typ.), EN logic thresholds (0.5V low / 1.3V high), and thermal resistance (179°C/W in SOT25).
Technical Context
The AP7343D-09W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with built-in auto-discharge functionality (indicated by "D" suffix). Its CMOS architecture enables low quiescent current and fast load transient response without requiring external compensation.
It delivers stable 0.9V output across –40°C to +85°C ambient, with thermal shutdown triggered at +150°C and hysteresis of +20°C. The enable pin supports direct logic-level control, and the device remains functional with input as low as 1.7V - enabling use with single-cell Li-ion or Li-polymer batteries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.9V ±1% at +25°C; ±30ppm/°C tempco ensures <±1.5% drift over full –40°C to +85°C range. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors, image sensors, or RF transceivers in portable systems. |
| Dropout Voltage | 0.51V (typ.) at 300mA output - allows operation with VIN as low as 1.41V while maintaining regulated 0.9V. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - critical for low-phase-noise RF local oscillators and high-resolution ADC/DAC references. |
| Quiescent Current | 35µA (typ.) - extends battery life in always-on sensor nodes or standby modes of handheld devices. |
| Enable Thresholds | VEN(HI) = 1.3V min, VEN(LO) = 0.5V max - compatible with 1.8V and 3.3V GPIO without level-shifting. |
Pinout & Package
AP7343D-09W5-7 is packaged in SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm), a surface-mount package with exposed pad for enhanced thermal dissipation. Pin 1 is VIN, Pin 2 is GND, Pin 3 is EN, Pin 4 is VOUT, and Pin 5 is NC (no connection). The exposed pad (EP) must be connected to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 (VIN) | Input Power Supply | Accepts 1.7V–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress supply glitches. |
| PIN 2 (GND) | Ground Reference | Primary return path for input/output current; must connect directly to low-impedance ground plane to minimize noise coupling. |
| PIN 3 (EN) | Enable Control Input | Active-high logic input; floating state is undefined - tie to VIN if always-on operation is required. |
| PIN 4 (VOUT) | Regulated Output | Delivers 0.9V ±1%; requires ≥1µF ceramic output capacitor near load to ensure stability and transient response. |
| PIN 5 (NC) | No Connection | Internally unconnected; must remain unconnected in PCB layout to avoid parasitic coupling or reliability risk. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Internal 30Ω NMOS discharge path activates when EN = low, rapidly discharging VOUT to prevent residual voltage hold-up in power sequencing. |
| High PSRR at low frequency | 75dB rejection at 1kHz enables clean power delivery to RF front-ends even when sharing noisy system rails with buck converters. |
| Low-noise regulation | 60µVrms broadband noise supports analog signal chains requiring sub-12-bit effective resolution without additional filtering. |
| Ultra-low quiescent current | 35µA typical IQ allows >1-year battery life in coin-cell-powered IoT sensors operating at 10µA average system current. |
| Thermal & short-circuit protection | Integrated +150°C thermal shutdown with +20°C hysteresis and ~60mA fold-back current limit prevent damage during fault conditions. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise bias voltage to GaAs or SiGe RF power amplifiers in 4G/5G mobile front-ends. IC Role / Device Role / Timing Role: LDO regulator delivering stable 0.9V core supply; replaces noisier switching regulators to reduce phase noise and EVM degradation. Use Value: 75dB PSRR at 1kHz suppresses switching ripple from PMIC DC-DC stages, improving ACLR by >3dB in LTE transmission. |
Use Scenario: Powering the digital core and analog pixel array of high-speed CMOS image sensors in smartphone cameras. IC Role / Device Role / Timing Role: Primary 0.9V supply for sensor logic and interface circuitry; synchronized with frame timing via EN pin for power-gating. Use Value: 60µVrms output noise prevents fixed-pattern noise (FPN) and improves SNR in low-light imaging modes. |
| Baseband Processor I/O Rail | Low-Power Bluetooth SoC Core Supply |
|
Use Scenario: Generating 0.9V I/O supply for application processors interfacing with LPDDR2/LPDDR3 memory in tablets. IC Role / Device Role / Timing Role: Dedicated LDO for memory interface rail; enabled only during active data transfer to minimize leakage. Use Value: 300mA output capability supports burst-mode DDR traffic; 0.51V dropout enables use with 1.4V intermediate bus. |
Use Scenario: Supplying 0.9V core voltage to Bluetooth 5.x LE SoCs during advertising and connection intervals. IC Role / Device Role / Timing Role: Always-on LDO with EN pin controlled by host MCU to gate power during deep sleep (0.01µA standby current). Use Value: 35µA quiescent current extends coin-cell battery life to >2 years in beacon applications with 100ms advertising interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-0902E/MB | 300mA, 0.9V, ±2% accuracy, 65dB PSRR @ 1kHz, 40µA IQ, SOT23-5 package. | Lacks auto-discharge; higher dropout (0.6V @ 300mA); lower PSRR reduces RF noise immunity. | Choose when cost sensitivity outweighs need for discharge or RF-grade PSRR. |
| Torex XC6210B092MR-G | 300mA, 0.9V, ±1% accuracy, 70dB PSRR @ 1kHz, 25µA IQ, SOT25 package, no discharge. | No discharge path; slightly lower PSRR and higher thermal resistance (190°C/W) limits high-ambient use. | Prefer where ultra-low IQ is critical and discharge is handled externally. |
Compared with MCP1703T-0902E/MB and XC6210B092MR-G, AP7343D-09W5-7 uniquely combines ±1% accuracy, 75dB PSRR, auto-discharge, and SOT25 thermal performance - making it optimal for RF-sensitive, battery-constrained, and power-sequenced designs.
Availability
AP7343D-09W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, baseband processor I/O rail, and low-power Bluetooth SoC core supply requiring stable component supply, automotive-qualified alternatives (AP7343Q), and long-term production continuity.
Supply support for AP7343D-09W5-7 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The AP7343 series belongs to Diodes' high-performance LDO portfolio, designed specifically for noise-sensitive, battery-powered portable electronics requiring ultra-low IQ, high PSRR, and precise output voltage regulation.
FAQ
What is the minimum input voltage required for AP7343D-09W5-7 to regulate 0.9V output at 300mA?
The minimum input voltage is determined by dropout voltage: 0.51V (typ.) + 0.9V = 1.41V. Per datasheet, absolute minimum VIN is 1.7V across temperature, ensuring reliable regulation under worst-case conditions including line/load transients and ±1% VOUT tolerance.
Does AP7343D-09W5-7 require an external discharge resistor?
No. The "D" suffix indicates integrated auto-discharge functionality: a 30Ω internal NMOS switch connects VOUT to GND when EN is low, discharging output capacitance without external components. This eliminates BOM cost and board area for discrete discharge circuits.
Can AP7343D-09W5-7 be used with ceramic output capacitors smaller than 1µF?
Yes - the device is stable with ≥0.47µF ceramic capacitors. However, 1µF is recommended for optimal load transient response per datasheet; values below 0.68µF may increase peak undershoot during 300mA step loads, especially with COUT ESR >10mΩ.
How does thermal performance differ between SOT25 and X2-DFN1010-4 packages for AP7343D-09W5-7?
SOT25 has RθJA = 179°C/W; X2-DFN1010-4 (Type B) has RθJA = 237°C/W. Though the DFN is smaller, its higher junction-to-ambient resistance means SOT25 delivers better thermal performance in standard JEDEC 2-layer boards - critical for sustained 300mA operation above 60°C ambient.
AP7343D-09W5-7 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):
- 0.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.8V @ 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-09W5-7 FAQ
1.How can I place an order for AP7343D-09W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343D-09W5-7 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-09W5-7 reliable?
The price and inventory of AP7343D-09W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-09W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343D-09W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-09W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343D-09W5-7?
AP7343D-09W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343D-09W5-7 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-09W5-7?
For technical support, including AP7343D-09W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-09W5-7 requirements.
6.How does Aetrix verify that AP7343D-09W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343D-09W5-7 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-09W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343D-09W5-7?
All AP7343D-09W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-09W5-7, 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-09W5-7 part is unused and in its original packaging.
Return procedure for AP7343D-09W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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