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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AP7315D-25W5-7

Name: AP7315D-25W5-7
Brand: Diodes Incorporated
SKU: AP7315D-25W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315D-25W5-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: SC-74A, SOT-753

Datasheet:: AP7315D-25W5-7.pdf

Description:: IC REG LINEAR 2.5V 150MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315D-25W5-7 from Diodes Incorporated is a 2.5V fixed-output, 150mA low-dropout linear regulator with enable control, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and delivers ultra-low quiescent current (35µA typical) for battery-powered RF supply and portable media applications.

For engineers reviewing the AP7315D-25W5-7 datasheet, AP7315D-25W5-7 pinout, AP7315D-25W5-7 application, or AP7315D-25W5-7 equivalent, key selection criteria include dropout voltage (280mV @150mA), EN logic thresholds (0.5V low / 1.3V high), thermal performance in SOT25, and built-in auto-discharge functionality for rapid VOUT discharge during shutdown.

Technical Context

The AP7315D-25W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active NMOS pass transistor with integrated discharge path. Its architecture enables fast load transient response (<100µs settling) and stable operation with 0.47µF ceramic input/output capacitors.

Unlike non-discharge variants (AP7315-xx), the "D" suffix denotes an internal 30Ω discharge FET between VOUT and GND activated when EN = low, reducing residual output voltage to <100mV within 200µs - critical for multi-rail sequencing and power-domain isolation in portable systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±1% - ensures stable core voltage for 2.5V I/O domains without external feedback resistors.
Max Output Current	150mA continuous - supports moderate-power RF ICs, camera sensors, and baseband processors.
Dropout Voltage	280mV @150mA - enables regulation from 2.78V input, compatible with single-cell Li-ion (2.8V min) and 3.3V rail down-conversion.
PSRR	75dB @1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes jitter in clock-sensitive analog circuits like ADCs and RF synthesizers.
Quiescent Current	35µA typical - extends battery life in always-on standby modes (e.g., Bluetooth LE receivers).
EN Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

SOT25 package (5-pin, 2.9mm × 2.8mm × 1.3mm) with exposed thermal pad; optimized for compact PCB layout and thermal dissipation via GND-connected copper area.

Pin/Terminal	Circuit Role	Design Meaning
1 – VIN	Input power supply	Accepts 1.7V–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance.
2 – GND	Ground reference	Primary return path for input/output currents; must connect directly to low-impedance ground plane.
3 – EN	Enable control input	Active-high logic; floating state disables regulator; internal pull-down not provided - external tie to VIN or MCU GPIO required.
4 – NC	No-connect terminal	Internally unconnected; recommended to tie to GND for enhanced thermal conduction and EMI shielding.
5 – VOUT	Regulated output	Delivers 2.5V ±1%; includes integrated discharge FET to GND when EN = low, eliminating need for external bleed resistor.

Key Features

Feature	Design Value
Auto-discharge function	30Ω internal FET discharges VOUT to <100mV in <200µs upon shutdown - prevents back-powering of upstream circuits.
Ultra-low noise output	60µV_rms broadband noise enables clean power for RF front-ends and high-resolution audio codecs.
High PSRR at low frequency	75dB rejection at 1kHz allows co-location with noisy buck converters without additional filtering.
Low-quiescent-current operation	35µA IQ supports >1-year battery life in IoT sensor nodes with 10µA average system current.
Wide input voltage range	1.7V–5.25V operation accommodates single-cell Li-ion (2.8–4.2V), USB (4.75–5.25V), and 3.3V/2.5V intermediate rails.

Applications

RF Power Amplifier Bias

CMOS Image Sensor Core Supply

Use Scenario: Providing clean, stable bias voltage to GaAs pHEMT power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise LDO delivering 2.5V at up to 150mA with minimal ripple-induced AM-to-PM distortion.

Use Value: 60µV_rms noise and 75dB PSRR prevent spectral regrowth and maintain ACLR compliance under dynamic PA load conditions.

Use Scenario: Powering analog core circuitry (pixel array, column ADC) in smartphone image sensors.

IC Role / Device Role / Timing Role: Precision 2.5V supply with ±1% accuracy and fast transient response to pixel readout current spikes.

Use Value: 280mV dropout enables operation from degraded 2.8V battery, while auto-discharge prevents ghost exposure during frame reset.

Wireless Audio Codec Reference

Low-Power Microcontroller I/O Rail

Use Scenario: Generating reference voltage for stereo DAC/ADC in Bluetooth headphones with 20-hour battery life.

IC Role / Device Role / Timing Role: Ultra-low-IQ LDO supplying 2.5V to codec analog section, synchronized to audio sample clock.

Use Value: 35µA quiescent current contributes <0.1% to total system standby draw, preserving battery capacity during idle periods.

Use Scenario: Powering 2.5V I/O banks of ARM Cortex-M0+ microcontrollers in wearables and medical patches.

IC Role / Device Role / Timing Role: Enable-controlled LDO enabling software-defined power gating of peripheral interfaces.

Use Value: Active-high EN interface allows precise timing of I/O rail activation/deactivation during sleep/wake transitions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2502E/MB	250mA rated, 6µA IQ, no enable or discharge; SOT23-3 package	Lacks EN control and auto-discharge; requires external shutdown circuitry	Choose only if ultra-low IQ dominates over sequencing control and footprint is constrained to 3-pin SOT23.
Torex XC6219B251MR-G	200mA rated, 15µA IQ, EN pin, no discharge; SOT25 package	Same pinout but missing discharge FET - needs external 10kΩ bleed resistor for VOUT decay	Select when lower IQ is critical and board space allows discrete discharge solution.

Compared with MCP1700T-2502E/MB and XC6219B251MR-G, the AP7315D-25W5-7 uniquely combines 150mA capability, 35µA IQ, EN control, and integrated discharge in a standard SOT25 - eliminating design compromises between efficiency, sequencing fidelity, and component count.

Availability

AP7315D-25W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, wireless audio codec reference, and low-power microcontroller I/O rail applications requiring stable component supply across production lifecycles.

Supply support for AP7315D-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 solutions for power management, signal integrity, and connectivity applications.

The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for noise-sensitive portable electronics - emphasizing small-footprint packaging, fast transient response, and integrated features like auto-discharge to simplify power sequencing.

FAQ

What is the purpose of the NC pin on AP7315D-25W5-7?

Pin 4 is internally unconnected but thermally and electrically tied to the die substrate. Diodes recommends connecting it to GND on the PCB to improve thermal dissipation through increased copper area and reduce EMI susceptibility. It must never be left floating or driven to a voltage.

Does AP7315D-25W5-7 require an external discharge resistor?

No. The "D" suffix indicates integrated auto-discharge functionality: when EN is pulled low, an internal 30Ω FET connects VOUT to GND, discharging the output capacitor to <100mV within 200µs. This eliminates the need for external bleed resistors and reduces BOM count and board space.

Can AP7315D-25W5-7 operate with input voltage below 2.5V?

Yes. With a 2.5V output, minimum input is 2.78V (2.5V + 280mV dropout @150mA). However, the device functions down to 1.7V input - at reduced output current (e.g., 50mA at 2.0V input) - enabling use in brown-out conditions or multi-voltage rail systems where input may dip temporarily.

How does the AP7315D-25W5-7 handle short-circuit events?

It features fold-back current limiting: during VOUT-to-GND short, output current is clamped to ~55mA (typical), preventing thermal runaway. The regulator remains functional after fault removal and does not latch off - no external reset is needed. Thermal shutdown activates only if junction temperature exceeds 150°C.

AP7315D-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):: 5.25V

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:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7315D-25W5-7 FAQ

1.How can I place an order for AP7315D-25W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315D-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 AP7315D-25W5-7 reliable?

The price and inventory of AP7315D-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 AP7315D-25W5-7 is usually 5 days.

3.What payment methods are accepted for AP7315D-25W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-25W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315D-25W5-7?

AP7315D-25W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315D-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 AP7315D-25W5-7?

For technical support, including AP7315D-25W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-25W5-7 requirements.

6.How does Aetrix verify that AP7315D-25W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7315D-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 AP7315D-25W5-7 meets industry standards.

7.What is the process for return or replacement of AP7315D-25W5-7?

All AP7315D-25W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-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 AP7315D-25W5-7 part is unused and in its original packaging.

Return procedure for AP7315D-25W5-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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