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Diodes Incorporated AP7351D-25W5-7
- Part No.:
- AP7351D-25W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7351D-25W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7351D-25W5-7 from Diodes Incorporated is a 2.5V fixed-output, 150mA ultra-low quiescent current LDO regulator in SOT25 package, featuring ±1% output voltage accuracy, 0.5µA quiescent current, and enable-controlled shutdown - designed for power management in compact, battery-constrained systems such as wearable sensors and IoT edge nodes.
For engineers reviewing the AP7351D-25W5-7 datasheet, AP7351D-25W5-7 pinout, AP7351D-25W5-7 application, or AP7351D-25W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.43V typ), EN logic thresholds (0.4V low / 1.0V high), thermal shutdown behavior (+160°C), and compatibility with 0.1µF ceramic input/output capacitors.
Technical Context
The AP7351D-25W5-7 integrates an internal voltage reference, error amplifier, current-limit circuit, and active output discharge path. Its enable input accepts TTL/CMOS-compatible logic levels and supports full shutdown with 0.02µA standby current.
It operates across 1.4V to 5.5V input range while maintaining stable 2.5V output up to 150mA load, with PSRR of 60dB at 1kHz and dropout voltage as low as 0.43V at IOUT = 150mA - enabling use in single-cell Li-ion, coin-cell, and multi-rail embedded systems where efficiency and precision are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% at +25°C; ±2% over −40°C to +85°C - ensures stable MCU core or sensor bias under temperature variation. |
| Max Output Current | 150mA - sufficient to power low-power microcontrollers, BLE radios, or image sensors without external pass devices. |
| Quiescent Current | 0.5µA typ - extends battery life in always-on wearables by minimizing no-load drain. |
| Dropout Voltage | 0.43V typ at 150mA - allows operation down to 2.93V input for 2.5V output, supporting aging or partially discharged batteries. |
| PSRR | 60dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Enable Thresholds | VEN(H) ≥ 1.0V, VEN(L) ≤ 0.4V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | +160°C threshold with +20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
SOT25 package: 5-pin surface-mount, 2.8mm × 1.6mm footprint, exposed pad for thermal enhancement (not electrically connected). Pin 4 is VIN, Pin 1 is VOUT, Pin 2 is GND, Pin 3 is EN, Pin 5 is NC (no connection) - matches JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 | VOUT | Regulated 2.5V output; requires local 0.1µF ceramic capacitor to GND for stability and transient response. |
| PIN2 | GND | Analog/digital ground reference; must be connected directly to low-impedance PCB ground plane. |
| PIN3 | EN | Active-high enable; driven high (>1.0V) to activate regulator, low (<0.4V) to enter 0.02µA shutdown mode. |
| PIN4 | VIN | Input supply (1.4–5.5V); requires 0.1µF decoupling capacitor placed adjacent to this pin. |
| PIN5 | NC | No internal connection; left floating or tied to GND per layout best practice - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.5µA typical enables >1-year runtime on CR2032 in always-on sensor nodes. |
| Active output discharge | 35Ω internal discharge path rapidly pulls VOUT to GND during shutdown - prevents floating bias in downstream circuits. |
| Wide input voltage range | 1.4V to 5.5V supports direct connection to single Li-ion, NiMH, or regulated system rails. |
| High output accuracy | ±1% at +25°C and ±2% over full temperature range ensures reliable ADC reference or logic-level compliance. |
| Low dropout at full load | 0.43V typ at 150mA allows efficient operation even as battery voltage declines below 3.0V. |
Applications
| Wearable Health Monitor | IoT Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by coin cell or thin-film battery. IC Role / Device Role / Timing Role: Primary power rail regulator for analog front-end and low-power MCU. Use Value: 0.5µA quiescent current extends battery life beyond 12 months; ±1% VOUT maintains ADC linearity and sensor calibration integrity. | Use Scenario: Battery-powered environmental sensor (temp/humidity/pressure) transmitting via LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Stable 2.5V supply for precision analog sensors and RF transceiver during burst transmission. Use Value: 60dB PSRR rejects noise from RF power amplifier switching; 150mA capability supports peak transmit current without brownout. |
| Wireless Camera Module | Industrial Edge Controller |
Use Scenario: Miniaturized security camera using CMOS image sensor and Wi-Fi SoC. IC Role / Device Role / Timing Role: Dedicated LDO for image sensor analog supply, isolated from noisy digital domains. Use Value: Active output discharge prevents ghost power-up of sensor after shutdown; 0.1µF COUT compatibility simplifies layout in space-constrained modules. | Use Scenario: Programmable logic controller (PLC) I/O module with isolated analog inputs and microcontroller. IC Role / Device Role / Timing Role: Local regulation for isolated ADC reference and low-noise signal conditioning circuitry. Use Value: 0.43V dropout enables operation from 3.3V backplane even under load; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 100mA max output, 1.6µA IQ, no active discharge, SOT23-5 package | Limited to lower-current peripherals; lacks fast VOUT discharge for sequencing-critical systems | Select when cost sensitivity outweighs discharge need and load stays below 100mA |
| Torex XC6210B252MR-G | 200mA max output, 1.0µA IQ, no EN pin, SOT25 footprint | Always-on operation only; unsuitable for power-gated subsystems requiring controlled startup/shutdown | Choose when higher current headroom is needed and enable control is unnecessary |
Compared with MCP1700T-2502E/TT and XC6210B252MR-G, the AP7351D-25W5-7 uniquely combines 150mA drive, sub-µA quiescent current, and active discharge in a standard SOT25 - making it optimal for battery-powered systems requiring both longevity and precise power sequencing.
Availability
AP7351D-25W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, wireless camera modules, and industrial edge controllers requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for AP7351D-25W5-7 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 AP7351D belongs to Diodes' ultra-low-IQ LDO family, engineered specifically for extended-battery-life portable and wireless systems where micropower operation and tight voltage regulation are mandatory.
FAQ
What is the minimum input voltage required for AP7351D-25W5-7 to regulate 2.5V output at 150mA?
The minimum input voltage is determined by dropout: 2.5V + 0.43V = 2.93V (typical). At worst-case 0.75V dropout (max spec), VIN must be ≥3.25V. Operation below 1.4V input is prohibited per absolute maximum ratings.
Does AP7351D-25W5-7 require an external pull-up on the EN pin for default-on operation?
No - the EN pin has no internal pull-up. To ensure default-on behavior, tie EN directly to VIN. Leaving EN floating risks undefined operation due to susceptibility to noise or leakage currents.
Can AP7351D-25W5-7 be used with tantalum output capacitors instead of ceramic?
No - the device is optimized for ceramic capacitors ≥0.1µF with low ESR. Tantalum capacitors typically exhibit higher ESR and may cause instability or excessive overshoot during load transients per the datasheet's stability requirements.
Is the exposed pad on the SOT25 package of AP7351D-25W5-7 electrically connected?
No - the exposed pad is not internally connected to any die node. It serves solely as a thermal conduction path and should be soldered to a large copper area tied to GND for improved heat dissipation, but must not be used as a functional ground terminal.
AP7351D-25W5-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.48V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7351D-25W5-7 FAQ
1.How can I place an order for AP7351D-25W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7351D-25W5-7 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 AP7351D-25W5-7 reliable?
The price and inventory of AP7351D-25W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7351D-25W5-7 is usually 5 days.
3.What payment methods are accepted for AP7351D-25W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7351D-25W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7351D-25W5-7?
AP7351D-25W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7351D-25W5-7 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 AP7351D-25W5-7?
For technical support, including AP7351D-25W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7351D-25W5-7 requirements.
6.How does Aetrix verify that AP7351D-25W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7351D-25W5-7 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 AP7351D-25W5-7 meets industry standards.
7.What is the process for return or replacement of AP7351D-25W5-7?
All AP7351D-25W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7351D-25W5-7, 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 AP7351D-25W5-7 part is unused and in its original packaging.
Return procedure for AP7351D-25W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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