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

Diodes Incorporated AP7315-28W5-7

Name: AP7315-28W5-7
Brand: Diodes Incorporated
SKU: AP7315-28W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-28W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7315-28W5-7.pdf

Description:: IC REG LINEAR 2.8V 150MA SOT25

Quantity:: RFQ Add To RFQ list

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Inventory:2,900

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Product details

Overview

AP7315-28W5-7 from Diodes Incorporated is a 150mA, 2.8V fixed-output low-dropout linear regulator with ±1% output accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, CMOS-based architecture, and operates from 1.7V to 5.25V input - optimized for RF supply rails in compact portable electronics.

For engineers reviewing the AP7315-28W5-7 datasheet, AP7315-28W5-7 pinout, AP7315-28W5-7 application, or AP7315-28W5-7 equivalent, this LDO delivers high PSRR and ultra-low noise in a space-constrained SOT25 package - critical for noise-sensitive analog/RF subsystems requiring stable 2.8V biasing without switching interference.

Technical Context

The AP7315-28W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor - enabling fast load transient response (<100µs settling) and stable regulation under 150mA load steps. Its non-discharge architecture maintains output voltage during shutdown, avoiding unintended discharge of downstream capacitance.

Designed for low-noise power domains, it achieves 75dB ripple rejection at 1kHz and 60µV_rms integrated noise by minimizing internal reference and amplifier noise contributions - verified across –40°C to +85°C ambient range with 0.47µF ceramic input/output capacitors.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% - ensures precise biasing for 2.8V-rated RF transceivers and image sensors without external feedback.
Max Output Current	150mA - supports moderate-power analog blocks like VCOs, LNAs, or ADC front-ends in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz) - avoids degradation of SNR in RF receivers and high-resolution audio paths.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby-mode communication modules.
Dropout Voltage	210mV at 150mA - enables operation from 3.01V input, supporting single-cell Li-ion (3.0–4.2V) or regulated 3.3V rail derating.
Input Voltage Range	1.7V to 5.25V - accommodates direct connection to wide-input PMIC outputs or multi-cell battery sources.

Pinout & Package

SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed thermal pad (pin 5). Requires PCB copper pour connected to GND for thermal dissipation; pin 4 is NC and recommended tied to GND for layout stability.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Power input	Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed within 2mm for input stability.
2 - GND	Ground reference	Primary return path for load current; must connect directly to low-impedance ground plane.
3 - EN	Enable control	Active-high logic input (1.3–5.25V high, 0–0.5V low); floating state disables regulator - tie to VIN if always-on operation required.
4 - NC	No-connect	Internally unconnected; recommended to tie to GND to maximize thermal copper area and reduce EMI susceptibility.
5 - VOUT	Regulated output	Delivers 2.8V ±1% to load; place 0.47µF ceramic capacitor ≤2mm away to ensure transient stability.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz - maintains clean 2.8V rail despite ripple on shared 3.3V or 5V system supplies.
Ultra-low noise	60µV_rms (10Hz–100kHz) - prevents phase noise degradation in local oscillators and jitter accumulation in clocked interfaces.
Low quiescent current	35µA - enables >1-year battery life in BLE/Wi-Fi IoT endpoints operating at 10µA average system current.
Precision output accuracy	±1% over temperature - eliminates need for post-regulation trimming in production test for 2.8V camera sensor biasing.
Wide input range	1.7–5.25V - supports direct integration into multi-rail PMIC architectures without intermediate pre-regulation.

Applications

RF Power Amplifier Bias

CMOS Image Sensor Core Supply

Use Scenario: Providing stable 2.8V bias to GaAs pHEMT PA stages in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise LDO delivering clean DC bias independent of noisy switcher-derived 3.3V/5V rails.

Use Value: Prevents AM-to-PM distortion and adjacent-channel leakage by suppressing 100kHz–1MHz switching artifacts via 75dB PSRR.

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

IC Role / Device Role / Timing Role: Fixed 2.8V regulator ensuring consistent pixel response and dark-current stability across temperature.

Use Value: ±1% accuracy and 60µV_rms noise maintain <1 LSB INL error in 12-bit column ADCs under dynamic lighting conditions.

Wireless Audio Codec Reference

Low-Power MCU I/O Rail

Use Scenario: Generating 2.8V reference for DAC/ADC sections in Bluetooth audio SoCs.

IC Role / Device Role / Timing Role: Ultra-low-noise LDO isolating sensitive audio conversion circuitry from digital supply noise.

Use Value: 60µV_rms noise contributes <–105dB THD+N floor, preserving >95dB SNR in Class-D headphone amplifiers.

Use Scenario: Supplying 2.8V I/O domain for ARM Cortex-M microcontrollers interfacing with 2.8V displays or sensors.

IC Role / Device Role / Timing Role: Enable-controlled LDO allowing software-gated power to peripheral subsystems during sleep.

Use Value: 35µA quiescent current and 0.01µA shutdown current minimize wake-up latency while extending deep-sleep battery life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2802E/TT	250mA rated, 6µV_rms noise (10Hz–100kHz), but only 60dB PSRR at 1kHz and 1.6µA quiescent current.	Better suited for ultra-low-I_Q always-on monitoring, less effective against mid-frequency switching noise.	Select when lowest standby current dominates; avoid where 75dB PSRR at 1kHz is required for RF coexistence.
Torex XC6210B282MR-G	150mA, ±2% accuracy, 40µV_rms noise, 70dB PSRR at 1kHz, 25µA I_Q, SOT25-compatible footprint.	Lower accuracy and PSRR margin; tighter noise spec but no enable pin - fixed-on operation only.	Choose for cost-sensitive designs accepting ±2% tolerance and no enable control; verify stability with target C_OUT.

Compared with MCP1700T-2802E/TT and XC6210B282MR-G, the AP7315-28W5-7 uniquely balances 75dB PSRR, ±1% accuracy, and enable functionality in SOT25 - making it optimal for RF-biased systems requiring both noise immunity and dynamic power gating.

Availability

AP7315-28W5-7 is available at Aetrix Electronics and suitable for RF power amplifier biasing, CMOS image sensor core supply, wireless audio codec reference, and low-power MCU I/O rail applications requiring stable component supply across high-mix consumer electronics production.

Supply support for AP7315-28W5-7 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 - serving automotive, industrial, computing, and consumer markets.

The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO product line, engineered specifically for noise-critical analog and RF subsystems in battery-powered portable electronics where clean, stable, and efficient voltage regulation is essential.

FAQ

What is the thermal pad connection requirement for AP7315-28W5-7?

The SOT25 package includes an exposed thermal pad (pin 5) that must be connected to a large PCB copper area tied to GND for effective heat dissipation. Do not use the pad as the sole GND electrode; instead, connect it to the main ground plane using multiple vias to minimize thermal resistance and ensure junction temperature stays below 125°C at 150mA load.

Can AP7315-28W5-7 be used with ceramic output capacitors smaller than 0.47µF?

No - the AP7315-28W5-7 is characterized and guaranteed stable only with ≥0.47µF ceramic output capacitance. Using smaller values risks instability and excessive output voltage overshoot during load transients, as confirmed by ESR vs. output current stability curves in the datasheet (DS38352 Rev. 2-2, p.11).

Does AP7315-28W5-7 include short-circuit protection?

Yes - it features fold-back current limiting that clamps output current to approximately 55mA when VOUT is shorted to GND. This protects the device from thermal damage during fault conditions and allows safe recovery once the short is removed, without requiring external current-sense circuitry.

How does the EN pin behave during power-up sequencing?

The EN pin must exceed 1.3V to enable regulation; below 0.5V, the device enters shutdown with 0.01µA standby current. During power-up, VIN must reach ≥1.7V before EN is asserted - if EN rises before VIN stabilizes, the regulator may latch in undefined state. Always sequence EN after VIN or tie EN to VIN for default-on operation.

AP7315-28W5-7 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):: 2.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.29V @ 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

AP7315-28W5-7 FAQ

1.How can I place an order for AP7315-28W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-28W5-7 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 AP7315-28W5-7 reliable?

The price and inventory of AP7315-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-28W5-7 is usually 5 days.

3.What payment methods are accepted for AP7315-28W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-28W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-28W5-7?

AP7315-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-28W5-7 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 AP7315-28W5-7?

For technical support, including AP7315-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-28W5-7 requirements.

6.How does Aetrix verify that AP7315-28W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-28W5-7 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 AP7315-28W5-7 meets industry standards.

7.What is the process for return or replacement of AP7315-28W5-7?

All AP7315-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-28W5-7, 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 AP7315-28W5-7 part is unused and in its original packaging.

Return procedure for AP7315-28W5-7:

1.Submit a request within 90 days.

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

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