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Diodes Incorporated AP7315-25SR-7
- Part No.:
- AP7315-25SR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7315-25SR-7.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
AP7315-25SR-7 from Diodes Incorporated is a 2.5V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in space-constrained portable electronics.
For engineers reviewing the AP7315-25SR-7 datasheet, AP7315-25SR-7 pinout, AP7315-25SR-7 application, or AP7315-25SR-7 equivalent, this page delivers verified electrical specs, SOT23-3 package layout guidance, thermal design notes, and real-world use cases in wireless communication subsystems.
Technical Context
The AP7315-25SR-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and enable control logic. Its non-discharge architecture maintains output voltage during shutdown without actively discharging the load capacitor.
It operates across 1.7V–5.25V input range with dropout voltage as low as 280mV at 150mA (for VOUT = 2.5V), and features EN pin logic thresholds of 0.5V (max low) and 1.3V (min high) to ensure robust enable/disable control in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% - ensures stable biasing for 2.5V-tolerant RF ICs and baseband processors. |
| Max Output Current | 150mA - sufficient for powering single-band RF transceivers or camera sensor analog blocks. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise degradation in local oscillator supply paths. |
| Quiescent Current | 35µA typical - enables multi-day battery life in always-on sensor or BLE beacon applications. |
| Dropout Voltage | 280mV at 150mA - allows operation from single-cell Li-ion (3.0V min) or 3.3V rail with margin. |
| Enable Threshold | VIL ≤ 0.5V, VIH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
SOT23-3 (SR variant) is a 3-pin, surface-mount plastic package measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads; optimized for high-density PCB layouts and automated assembly. Thermal performance relies on direct GND pad connection and minimal trace impedance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Input power supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin. |
| GND (Pin 1) | Ground reference | Low-impedance return path; must connect directly to solid ground plane to minimize noise coupling. |
| VOUT (Pin 2) | Regulated output | Delivers 2.5V ±1%; output capacitor (≥0.47µF ceramic) required for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz - preserves signal integrity in RF front-end power domains by rejecting switcher ripple. |
| Ultra-low noise | 60µVrms (10Hz–100kHz) - avoids modulation artifacts in sensitive analog signal chains. |
| Low quiescent current | 35µA typical - extends runtime in battery-powered IoT nodes with periodic wake-up cycles. |
| Wide input range | 1.7V–5.25V - supports direct connection to Li-ion, Li-Po, or regulated 3.3V/5V system rails. |
| Enable control | Logic-compatible EN pin (not present on SR package - tied internally to VIN) - simplifies power sequencing in compact designs. |
Applications
| RF Power Amplifier Bias | Camera Sensor Analog Supply |
|---|---|
|
Use Scenario: Providing clean, stable 2.5V bias to GaAs pHEMT power amplifiers in 2.4GHz Wi-Fi modules. IC Role / Device Role / Timing Role: LDO regulator delivering low-noise, tightly regulated voltage to PA collector/drain node. Use Value: Prevents AM-to-PM distortion and EVM degradation caused by supply ripple or load-induced droop. |
Use Scenario: Powering analog pixel array and column ADC circuitry in mobile phone image sensors. IC Role / Device Role / Timing Role: Low-noise voltage source for sensor analog core, isolated from digital switching noise. Use Value: Reduces fixed-pattern noise and improves SNR by minimizing supply-induced pixel voltage variation. |
| BLE/Wireless SoC Core Rail | Portable Media Player Audio Codec |
|
Use Scenario: Supplying 2.5V to the RF transceiver and baseband processor core in Bluetooth Low Energy SoCs. IC Role / Device Role / Timing Role: Primary linear regulator for mixed-signal SoC domain requiring fast load transient response. Use Value: Maintains <1% output deviation during 100mA step loads (e.g., TX burst), preventing digital lockup or RF desense. |
Use Scenario: Delivering 2.5V to stereo audio DAC and headphone amplifier in portable media players. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital subsystems. Use Value: Enables >100dB THD+N performance by eliminating power-supply-induced harmonic distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 250mA rated, 6µA quiescent current, but only 60dB PSRR at 1kHz and 120µVrms noise. | Better suited for ultra-low-power microcontroller rails than RF-sensitive analog circuits. | Select when lowest IQ dominates over noise/PSRR requirements. |
| Torex XC6206P252MR-G | 150mA rated, ±2% accuracy, 45dB PSRR at 1kHz, no enable pin in SOT23-3 variant. | Limited for RF applications due to lower PSRR and lack of active enable control. | Choose only for cost-sensitive, non-critical analog rails where 2% tolerance is acceptable. |
Compared with MCP1700-2502E/TO and XC6206P252MR-G, the AP7315-25SR-7 delivers superior RF immunity (75dB vs. ≤60dB PSRR) and lower noise (60µVrms vs. ≥120µVrms), making it the preferred choice for noise-sensitive analog and RF subsystems despite slightly higher IQ.
Availability
AP7315-25SR-7 is available at Aetrix Electronics and suitable for RF supply, camera sensor bias, portable media player audio, and BLE SoC core rail applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for AP7315-25SR-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 devices, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.
The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO portfolio, engineered specifically for power integrity in portable wireless and imaging systems where supply noise directly impacts RF performance and image quality.
FAQ
What is the maximum input voltage for AP7315-25SR-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may trigger internal protection or degrade long-term reliability; operation above 6.0V risks permanent damage per Absolute Maximum Ratings.
Does AP7315-25SR-7 include an enable pin?
No - the SR suffix denotes the SOT23-3 package variant with EN internally tied to VIN, resulting in always-on operation. The enable function is only available in SOT25 (5-pin) and X2-DFN1010-4 (4-pin) variants, not in SR.
What output capacitor is required for stability?
A minimum 0.47µF ceramic capacitor is required between VOUT and GND, placed within 3mm of the pins. Low-ESR X5R/X7R types are recommended; bulk capacitance may be added for large load transients, but the ceramic cap is mandatory for loop stability.
How does thermal performance depend on PCB layout?
Thermal resistance (θJA) is highly layout-dependent: a 1-inch² copper pour connected to the GND pin reduces θJA from ~250°C/W (JEDEC standard) to ~120°C/W. Avoid routing high-current traces near the device and ensure uninterrupted GND plane under the package.
AP7315-25SR-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7315-25SR-7 FAQ
1.How can I place an order for AP7315-25SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-25SR-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 AP7315-25SR-7 reliable?
The price and inventory of AP7315-25SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-25SR-7 is usually 5 days.
3.What payment methods are accepted for AP7315-25SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-25SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-25SR-7?
AP7315-25SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-25SR-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 AP7315-25SR-7?
For technical support, including AP7315-25SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-25SR-7 requirements.
6.How does Aetrix verify that AP7315-25SR-7 is sourced from the original manufacturer or authorized distributors?
All AP7315-25SR-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 AP7315-25SR-7 meets industry standards.
7.What is the process for return or replacement of AP7315-25SR-7?
All AP7315-25SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-25SR-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 AP7315-25SR-7 part is unused and in its original packaging.
Return procedure for AP7315-25SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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