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Diodes Incorporated AP7343D-12W5-7
- Part No.:
- AP7343D-12W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343D-12W5-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7343D-12W5-7 from Diodes Incorporated is a 300mA, 1.2V fixed-output low-dropout linear regulator (LDO) with enable control, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Fabricated in CMOS, it features low quiescent current (35µA), thermal shutdown, and short-circuit protection. It powers RF supplies and camera modules in space-constrained portable electronics.
For engineers reviewing the AP7343D-12W5-7 datasheet, AP7343D-12W5-7 pinout, AP7343D-12W5-7 application, or AP7343D-12W5-7 equivalent, key selection criteria include dropout voltage (≤0.46V @300mA for 1.2V output), EN logic thresholds (0–0.5V low, 1.3–5.25V high), thermal resistance (179°C/W in SOT25), and discharge functionality enabled by the 'D' suffix.
Technical Context
The AP7343D-12W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with built-in auto-discharge (enabled by 'D' suffix). Its CMOS architecture enables ultra-low quiescent current and fast load transient response without external compensation.
It operates across 1.7V–5.25V input range and delivers stable 1.2V output up to 300mA. The enable pin (EN) provides precise on/off control with <1.0µA leakage, while internal thermal shutdown (150°C threshold, 20°C hysteresis) ensures robust operation under overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% - ensures stable bias for RF transceivers and image sensors requiring tight regulation. |
| Max Output Current | 300mA - supports moderate-power subsystems like camera ISPs or Bluetooth baseband ICs. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy power rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise in RF local oscillators and jitter in high-speed ADC clocks. |
| Quiescent Current | 35µA typical - extends battery life in always-on sensor nodes and standby modes of portable media players. |
| Dropout Voltage | 0.46V max @300mA - enables operation from single-cell Li-ion (3.0V min) down to 1.66V input while maintaining regulation. |
| Enable Thresholds | VIL ≤0.5V, VIH ≥1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
AP7343D-12W5-7 uses the SOT25 (5-pin) package - a compact surface-mount outline with exposed pad for thermal enhancement. 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 dissipation (RθJB = 79.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input Power Supply | Accepts 1.7–5.25V; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress supply glitches. |
| GND (Pin 2) | Power Ground Reference | Primary return path for load current; must connect directly to low-impedance ground plane to minimize noise coupling. |
| EN (Pin 3) | Enable Control Input | Active-high logic: drives regulator ON when ≥1.3V, OFF when ≤0.5V; floating state is prohibited. |
| VOUT (Pin 4) | Regulated Output | Delivers 1.2V ±1% to load; includes internal discharge FET ('D' variant) to rapidly deplete output capacitance during shutdown. |
| NC (Pin 5) | No Connection | Not internally bonded; must remain unconnected in PCB layout to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated NMOS discharge switch (RON ≈30Ω) actively pulls VOUT to GND during shutdown - prevents residual voltage from interfering with downstream logic sequencing. |
| High PSRR at low frequency | 75dB rejection at 1kHz - critical for isolating sensitive analog circuits (e.g., RF front-ends) from digital switching noise. |
| Ultra-low noise output | 60µVrms broadband noise - meets stringent requirements for low-jitter clock generation and high-SNR audio signal chains. |
| Thermal protection with hysteresis | 150°C shutdown + 20°C hysteresis - prevents thermal cycling damage during sustained overload or poor heatsinking. |
| Wide input voltage range | 1.7V to 5.25V - supports direct regulation from single-cell Li-ion, USB VBUS, or multi-rail intermediate supplies. |
Applications
| RF Power Amplifier Bias | CMOS Image Sensor Core Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise bias to GaAs pHEMT power amplifiers in 4G/5G mobile front-ends. IC Role / Device Role / Timing Role: LDO regulator delivering stable 1.2V core voltage with minimal ripple-induced AM-to-PM distortion. Use Value: 75dB PSRR at 1kHz and 60µVrms noise reduce spectral regrowth and improve EVM performance under dynamic load. |
Use Scenario: Powering the analog core of high-resolution CMOS image sensors in smartphone cameras. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying pixel array and column ADC circuitry. Use Value: 35µA quiescent current extends standby time; 0.46V dropout enables use with aging batteries down to 1.66V input. |
| Bluetooth Baseband Processor Core | Portable Media Player Audio Codec |
|
Use Scenario: Regulating core voltage for Bluetooth SoCs operating in burst-mode transmission/reception cycles. IC Role / Device Role / Timing Role: Enable-controlled LDO providing 1.2V to processor core, synchronized with radio activity. Use Value: Fast turn-on/turn-off response (<200µs) and auto-discharge ensure precise power gating and eliminate wake-up latency. |
Use Scenario: Supplying low-noise analog supply to stereo audio DACs and headphone amplifiers in portable players. IC Role / Device Role / Timing Role: Ultra-low-noise LDO replacing noisier switching regulators to preserve SNR and THD+N. Use Value: 60µVrms noise floor maintains >100dB SNR; ±1% accuracy ensures consistent gain calibration across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 250mA max output, 6µA IQ, no enable pin, no auto-discharge | Lacks EN control and discharge - unsuitable for power-gated systems requiring rapid VOUT decay | Select only for always-on, ultra-low-IQ applications where 300mA headroom and discharge are unnecessary |
| Torex XC6210B122MR-G | 300mA, 1.2V, 1.5µA IQ, no discharge, different EN polarity (active-low) | Requires inverted logic drive; lacks discharge path - risks latch-up in cascaded power domains | Use only if system-level EN signal inversion is available and discharge is handled externally |
Compared with MCP1700T-1202E/TT and XC6210B122MR-G, AP7343D-12W5-7 uniquely combines 300mA capability, active-high EN, and integrated discharge - enabling reliable power sequencing in battery-powered RF and imaging subsystems without external components.
Availability
AP7343D-12W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, Bluetooth baseband processor core, and portable media player audio codec applications requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for AP7343D-12W5-7 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-PSRR, low-noise LDO product line, designed specifically for noise-sensitive portable electronics including smartphones, tablets, and wireless communication modules.
FAQ
What is the purpose of the 'D' suffix in AP7343D-12W5-7?
The 'D' denotes integrated auto-discharge functionality: when the EN pin is pulled low, an internal 30Ω NMOS switch connects VOUT to GND, rapidly discharging output capacitance. This prevents residual voltage from causing unintended wake-up or logic contention in power-gated systems - confirmed in Electrical Characteristics (Note 10) and Turn-Off Waveforms (Page 11).
Can AP7343D-12W5-7 operate with input voltage below 1.7V?
No. The absolute minimum input voltage is 1.7V per Recommended Operating Conditions (Page 4). Operation below this violates specification and may cause dropout, regulation loss, or undefined behavior. At 1.2V output, the minimum functional input is 1.66V (1.2V + 0.46V dropout), but 1.7V is the guaranteed operational floor.
Is the NC pin (Pin 5) required to be grounded or left floating?
Pin 5 is a true no-connect terminal - not internally bonded. It must remain unconnected in the PCB layout. Connecting it to GND or any other net introduces risk of parasitic coupling or mechanical stress on the bond wire, potentially degrading thermal performance or reliability.
How does thermal resistance differ between SOT25 and X2-DFN1010-4 packages?
In SOT25, RθJA = 179°C/W and RθJC = 52°C/W; in X2-DFN1010-4 (Type B), RθJA = 237°C/W and RθJC = 96°C/W. The SOT25 offers superior thermal performance due to larger copper area and lower junction-to-board resistance (79.2°C/W vs. 85.72°C/W), making it preferred for higher ambient or continuous 300mA loads.
AP7343D-12W5-7 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):
- 1.2V
- 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-12W5-7 FAQ
1.How can I place an order for AP7343D-12W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343D-12W5-7 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-12W5-7 reliable?
The price and inventory of AP7343D-12W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343D-12W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343D-12W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343D-12W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343D-12W5-7?
AP7343D-12W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343D-12W5-7 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-12W5-7?
For technical support, including AP7343D-12W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343D-12W5-7 requirements.
6.How does Aetrix verify that AP7343D-12W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343D-12W5-7 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-12W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343D-12W5-7?
All AP7343D-12W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343D-12W5-7, 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-12W5-7 part is unused and in its original packaging.
Return procedure for AP7343D-12W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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