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Diodes Incorporated AP7343-135W5-7
- Part No.:
- AP7343-135W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343-135W5-7.pdf
- Description:
- IC REG LINEAR 1.35V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,567
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Product details
Overview
AP7343-135W5-7 from Diodes Incorporated is a 300mA, 1.35V fixed-output low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Built on a CMOS process, it features enable control, thermal shutdown, and short-circuit protection-designed for RF supply rails in portable media players and wireless adapters.
For engineers reviewing the AP7343-135W5-7 datasheet, AP7343-135W5-7 pinout, AP7343-135W5-7 application, or AP7343-135W5-7 equivalent, key selection criteria include its 1.7V–5.25V input range, 35µA quiescent current, SOT25 package footprint, and guaranteed 300mA output under load transients typical of battery-powered handheld systems.
Technical Context
The AP7343-135W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor to deliver stable 1.35V output with minimal dropout (≤0.46V at 300mA). Its enable input (EN) provides precise on/off control with defined logic thresholds (0–0.5V low, 1.3–5.25V high), and internal thermal shutdown activates at +150°C with +20°C hysteresis.
Designed for noise-sensitive analog and RF subsystems, it achieves 75dB ripple rejection at 1kHz and maintains 60µVrms integrated noise across 10Hz–100kHz-enabled by low-RDS(ON) architecture and optimized internal compensation for stability with 1µF ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.35V ±1% at +25°C; ensures stable bias for low-voltage RF ICs and sensor interfaces without external feedback. |
| Max Output Current | 300mA continuous; supports power delivery to multiple baseband processors or camera modules in compact portable designs. |
| Input Voltage Range | 1.7V to 5.25V; compatible with single-cell Li-ion (3.0–4.2V), Li-polymer, and regulated 3.3V/5V system rails. |
| PSRR @ 1kHz | 75dB; suppresses switching noise from adjacent DC-DC converters, critical for clean RF supply integrity. |
| Output Noise | 60µVrms (10Hz–100kHz); minimizes phase noise degradation in VCOs and ADC reference paths. |
| Quiescent Current | 35µA typical; extends battery life in always-on standby modes of wireless adapters and portable media players. |
| Dropout Voltage | 0.46V max at 300mA (SOT25); enables regulation from 1.81V input, preserving headroom in low-VIN applications. |
| Enable Threshold | VEN(HI) ≥1.3V, VEN(LO) ≤0.5V; compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
AP7343-135W5-7 is housed in the SOT25 (SC-74A) 5-pin surface-mount package, measuring 2.9mm × 1.6mm × 1.1mm, 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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 (VIN) | Power Input | Accepts 1.7–5.25V input; requires local 0.47µF ceramic decoupling capacitor placed adjacent to minimize supply impedance. |
| PIN2 (GND) | Ground Reference | Primary return path for input/output current; must connect to low-impedance PCB ground plane to ensure stability and noise immunity. |
| PIN3 (EN) | Enable Control | Active-high digital input; drives regulator into full operation when ≥1.3V, or shutdown mode when ≤0.5V-must not float. |
| PIN4 (VOUT) | Regulated Output | Delivers 1.35V ±1% to load; requires 1µF ceramic output capacitor near pin to maintain transient response and loop stability. |
| PIN5 (NC) | No Connection | Internally unconnected; may be left floating or tied to GND per layout best practices-no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR (75dB @ 1kHz) | Rejects noise from switching regulators feeding shared input rails-critical for RF front-end power integrity. |
| Low 60µVrms output noise | Preserves signal-to-noise ratio in precision analog circuits like audio codecs and RF synthesizers. |
| 35µA quiescent current | Reduces standby power loss in battery-operated devices, enabling >1-year shelf life in low-duty-cycle IoT endpoints. |
| Thermal shutdown (+150°C) | Prevents permanent damage during sustained overload or poor PCB thermal design-auto-recovers after cooldown. |
| Short-circuit current limit (~60mA) | Clamps fault current to protect both LDO and downstream circuitry during accidental VOUT-to-GND shorts. |
| ±1% output accuracy | Meets tight voltage tolerance requirements of modern low-power microcontrollers and memory interfaces. |
Applications
| Smartphone Baseband Power | Wireless Adapter RF Supply |
|---|---|
|
Use Scenario: Powering 1.35V I/O domains of application processors in dual-SIM smartphones with aggressive power gating. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering clean, regulated 1.35V to processor I/O banks during dynamic DVFS transitions. Use Value: Maintains ±1% output accuracy across -40°C to +85°C ambient, ensuring reliable interface timing margins under thermal stress. |
Use Scenario: Supplying 1.35V bias to 2.4GHz/5GHz Wi-Fi transceiver RF sections in USB-C wireless dongles. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating RF circuitry from noisy USB 5V input and DC-DC converter ripple. Use Value: 75dB PSRR at 1kHz prevents switching noise coupling into RF receive sensitivity, preserving -95dBm SNR. |
| Portable Media Player Audio Codec | Camera Module Sensor Bias |
|
Use Scenario: Providing ultra-low-noise 1.35V supply to stereo audio DACs and headphone amplifiers in flash-based MP4 players. IC Role / Device Role / Timing Role: Dedicated LDO for analog audio signal chain, decoupled from digital core supplies. Use Value: 60µVrms output noise avoids audible hiss and preserves >95dB THD+N performance in line-out path. |
Use Scenario: Biasing 1.35V analog front-end of CMOS image sensors in compact action cameras with rolling shutter readout. IC Role / Device Role / Timing Role: Stable voltage source for sensor pixel array and column ADC reference, minimizing fixed-pattern noise. Use Value: 0.46V dropout enables operation from partially discharged 3.0V battery, extending usable recording time by 12%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-135E/TT (Microchip) | 250mA output, 6µA IQ, 65dB PSRR @ 1kHz, SOT23-5 package | Limited to lighter loads; lower PSRR reduces noise rejection in RF-intensive layouts | Select when ultra-low quiescent current dominates over RF noise immunity and peak current demand |
| Torex XC6210B135MR-G (Torex) | 300mA output, 45µA IQ, 70dB PSRR @ 1kHz, SOT25 package | Slightly higher noise (75µVrms) and reduced PSRR margin vs. AP7343's 75dB spec | Choose for cost-sensitive consumer designs where 5dB PSRR deficit is acceptable in non-RF subsystems |
Compared with MCP1700T-135E/TT and XC6210B135MR-G, the AP7343-135W5-7 delivers superior RF supply integrity via its 75dB PSRR and 60µVrms noise-making it the preferred choice for co-located wireless transceivers where spectral purity is non-negotiable.
Availability
AP7343-135W5-7 is available at Aetrix Electronics and suitable for smartphone baseband power, wireless adapter RF supply, portable media player audio codec, and camera module sensor bias requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AP7343-135W5-7 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 belongs to Diodes' high-PSRR, low-noise LDO family engineered specifically for noise-critical portable electronics-including RF front-ends, audio subsystems, and imaging sensors-where voltage accuracy and spectral purity directly impact end-product performance.
FAQ
What is the minimum input voltage required for AP7343-135W5-7 to regulate 1.35V output?
The AP7343-135W5-7 requires a minimum input voltage of 1.7V per datasheet specifications. At 300mA load, its maximum dropout is 0.46V (SOT25), meaning it can sustain regulation down to VIN = 1.81V. Below 1.7V, the device enters dropout and output voltage drops proportionally with input.
Does AP7343-135W5-7 include output discharge functionality?
No. The part number suffix "-135W5-7" indicates a non-discharge variant (no internal pull-down transistor on VOUT). Discharge versions are designated with "D" prefix (e.g., AP7343D-135W5-7). This version holds output voltage after shutdown until external load discharges it.
Can AP7343-135W5-7 operate with only a 0.47µF input capacitor?
Yes. The datasheet specifies a minimum 0.47µF ceramic capacitor between VIN and GND. For optimal transient suppression and noise reduction-especially with fast-switching loads-a 1µF X7R ceramic placed adjacent to PIN1 and PIN2 is recommended per layout guidelines.
What thermal derating applies to AP7343-135W5-7 in SOT25 package at 85°C ambient?
In SOT25, θJA = 179°C/W. At TA = 85°C and TJ(MAX) = 125°C, allowable power dissipation is (125−85)/179 ≈ 223mW. With 1.35V output and 300mA load, worst-case dropout (0.46V) yields PD = 0.46V × 0.3A = 138mW-within safe operating area without forced airflow.
AP7343-135W5-7 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):
- 1.35V
- 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
AP7343-135W5-7 FAQ
1.How can I place an order for AP7343-135W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343-135W5-7 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 AP7343-135W5-7 reliable?
The price and inventory of AP7343-135W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343-135W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343-135W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343-135W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343-135W5-7?
AP7343-135W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343-135W5-7 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 AP7343-135W5-7?
For technical support, including AP7343-135W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343-135W5-7 requirements.
6.How does Aetrix verify that AP7343-135W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343-135W5-7 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 AP7343-135W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343-135W5-7?
All AP7343-135W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343-135W5-7, 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 AP7343-135W5-7 part is unused and in its original packaging.
Return procedure for AP7343-135W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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