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Diodes Incorporated AP7347D-25W5-7
- Part No.:
- AP7347D-25W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347D-25W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,776
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Product details
Overview
AP7347D-25W5-7 from Diodes Incorporated is a 2.5V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 60µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality, housed in a SOT25 (Type A1) package for space-constrained portable and automotive power rails.
For engineers reviewing the AP7347D-25W5-7 datasheet, AP7347D-25W5-7 pinout, AP7347D-25W5-7 application, or AP7347D-25W5-7 equivalent, key selection criteria include dropout voltage at 500mA (0.31–0.36V for 2.5V output), EN logic thresholds (0.5V max low, 1.25V min high), thermal resistance (140°C/W θJA), and compatibility with 1µF ceramic input/output capacitors.
Technical Context
The AP7347D-25W5-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor. Its auto-discharge function uses a 30Ω on-resistance N-channel switch between VOUT and GND when disabled, ensuring rapid output discharge.
It operates across 1.7V to 5.5V input range and maintains regulation down to 2.5V output with dropout as low as 0.31V at full 500mA load. Thermal shutdown activates at +170°C with +20°C hysteresis, and line/load transient response is optimized for battery-powered systems requiring stable 2.5V supply under dynamic load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% - ensures precise biasing for 2.5V logic, ADC references, and RF front-end ICs without external feedback. |
| Max Output Current | 500mA - supports moderate-power microcontrollers, sensors, and interface ICs in compact portable designs. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding noisy 3.3V/5V rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog supply for precision op-amps, DACs, and low-noise amplifiers. |
| Quiescent Current | 60µA typical - extends battery life in always-on sensor nodes and standby circuits. |
| Dropout Voltage | 0.31V at 500mA (2.5V output) - allows operation from single-cell Li-ion (3.0V min) or 3.3V rail with margin. |
| Enable Thresholds | VEN(H) ≥1.25V, VEN(L) ≤0.5V - compatible with 1.8V/3.3V GPIO control without level-shifting. |
| Thermal Shutdown | +170°C activation with +20°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 (Type A1) package: 5-pin surface-mount, 2.9mm × 2.8mm footprint, 1.45mm height, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires 1µF ceramic capacitor placed adjacent to minimize input impedance and suppress supply glitches. |
| 2 | EN | Active-high enable; must be driven to ≥1.25V to activate regulator; floating prohibited - tie to VIN if unused. |
| 3 | GND | Analog/digital ground reference; connect directly to low-impedance PCB ground plane to reduce noise coupling and improve PSRR. |
| 4 | VOUT | Regulated 2.5V output; place 1µF ceramic capacitor within 2mm of pin to ensure stability and transient response. |
| 5 | NC | No-connect terminal; internal open; recommended to tie to GND for improved thermal dissipation via PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR (75dB @ 1kHz) | Enables use after noisy buck converters without additional filtering, reducing BOM count and board area. |
| Low 60µVrms output noise | Meets stringent noise requirements for RF transceivers, audio codecs, and high-resolution SAR ADCs. |
| Auto-discharge (30Ω NMOS) | Drains VOUT to GND within microseconds upon disable, preventing back-powering of downstream circuitry. |
| ±1% output accuracy over -40°C to +125°C | Guarantees system-level timing and analog performance without calibration across automotive temperature range. |
| 1.7V to 5.5V input range | Supports direct connection to single-cell Li-ion (2.7–4.2V), USB 5V, or regulated 3.3V rails without pre-regulation. |
| Thermal shutdown + hysteresis | Prevents thermal runaway during fault conditions while avoiding oscillation near trip point during marginal loads. |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Wearable ECG patch with ultra-low-power MCU, analog front-end, and BLE radio operating from coin cell or small Li-ion. IC Role / Device Role / Timing Role: Primary 2.5V analog supply for signal chain and reference voltage source for 16-bit ADC. Use Value: 60µVrms noise and ±1% accuracy preserve SNR and measurement linearity; 60µA IQ extends battery life beyond 7 days. |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting in 12V automotive systems. IC Role / Device Role / Timing Role: Secondary 2.5V rail for CAN transceiver bias, microcontroller I/O, and EEPROM interface. Use Value: 75dB PSRR rejects alternator ripple and ignition noise; -40°C to +125°C operation meets AEC-Q100 Grade 2 requirements. |
| Industrial IoT Edge Nodes | Consumer Audio DAC Power |
|
Use Scenario: Battery-powered vibration sensor node with MEMS accelerometer, LoRaWAN transceiver, and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Clean 2.5V supply for sensor excitation and ADC reference, enabled only during sampling bursts. Use Value: EN-controlled shutdown reduces average current to <1µA in sleep mode; fast turn-on (<100µs) enables responsive wake-up. |
Use Scenario: Portable Bluetooth speaker using stereo DAC and Class-D amplifier powered by shared 3.3V rail. IC Role / Device Role / Timing Role: Dedicated low-noise 2.5V supply for DAC core and analog output stage to minimize THD+N. Use Value: 60µVrms noise directly improves DAC SFDR by >80dB; 0.31V dropout allows efficient use of 3.3V input without headroom loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 2.5V fixed, 250mA max, 120µA IQ, no auto-discharge, SOT23-5 package | Limited to lower-current peripherals; lacks fast discharge for isolated power domains | Select when cost sensitivity outweighs current demand and discharge requirement |
| Torex XC6210B252MR-G | 2.5V fixed, 500mA, 35µA IQ, no EN pin, no auto-discharge, SOT25 | Always-on operation only; unsuitable for power-gated subsystems | Choose for ultra-low-IQ applications where enable control and discharge are unnecessary |
Compared with MCP1703T-2502E/MB and XC6210B252MR-G, the AP7347D-25W5-7 uniquely combines 500mA drive, 60µA IQ, EN control, and auto-discharge in a thermally robust SOT25 package - making it optimal for battery-powered systems requiring both efficiency and controlled power sequencing.
Availability
AP7347D-25W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial IoT edge nodes, and consumer audio DAC power requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for AP7347D-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The AP7347D series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for noise-sensitive applications in automotive infotainment, ADAS camera modules, and portable instrumentation where clean, accurate, and controllable voltage regulation is critical.
FAQ
What is the minimum input voltage required for AP7347D-25W5-7 to regulate 2.5V output at 500mA?
The minimum input voltage is determined by dropout: 2.5V + 0.31V = 2.81V. Per datasheet specifications, the device maintains regulation down to 2.81V input at full 500mA load and 25°C ambient. At higher temperatures or worst-case process corners, 2.85V is recommended to ensure margin across -40°C to +125°C junction range.
Can AP7347D-25W5-7 be used without connecting the EN pin?
No - the EN pin must not be left floating. If enable functionality is unused, it must be tied directly to VIN to maintain continuous operation. Floating EN risks unintended shutdown due to noise coupling or leakage, potentially causing system reset or brownout. The datasheet explicitly prohibits unconnected EN.
Does AP7347D-25W5-7 require an output capacitor, and what type is recommended?
Yes - a minimum 1µF ceramic capacitor is required at VOUT for stability and transient response. X5R or X7R dielectrics are recommended for temperature stability. Low-ESR ceramic capacitors placed within 2mm of VOUT and GND pins minimize loop inductance and ensure phase margin >45° across operating conditions.
Is AP7347D-25W5-7 qualified for automotive applications?
The base AP7347D-25W5-7 is not AEC-Q200 qualified; however, the automotive-grade variant AP7347DQ-25W5-7 is available under a separate datasheet and meets AEC-Q200 Grade 2 (-40°C to +105°C ambient) with enhanced testing for humidity, vibration, and temperature cycling.
AP7347D-25W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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):
- 0.36V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- W-DFN2020-6 (SWP) (Type A1)
AP7347D-25W5-7 FAQ
1.How can I place an order for AP7347D-25W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347D-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 AP7347D-25W5-7 reliable?
The price and inventory of AP7347D-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 AP7347D-25W5-7 is usually 5 days.
3.What payment methods are accepted for AP7347D-25W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347D-25W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347D-25W5-7?
AP7347D-25W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347D-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 AP7347D-25W5-7?
For technical support, including AP7347D-25W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347D-25W5-7 requirements.
6.How does Aetrix verify that AP7347D-25W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7347D-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 AP7347D-25W5-7 meets industry standards.
7.What is the process for return or replacement of AP7347D-25W5-7?
All AP7347D-25W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347D-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 AP7347D-25W5-7 part is unused and in its original packaging.
Return procedure for AP7347D-25W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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