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

Diodes Incorporated AP7315-25SA-7

Name: AP7315-25SA-7
Brand: Diodes Incorporated
SKU: AP7315-25SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-25SA-7

Manufacturer:: Diodes Incorporated

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

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AP7315-25SA-7.pdf

Description:: IC REG LINEAR 2.5V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,161

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Product details

Overview

AP7315-25SA-7 from Diodes Incorporated is a 2.5V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in space-constrained portable electronics using the SOT23-3 package.

For engineers reviewing the AP7315-25SA-7 datasheet, AP7315-25SA-7 pinout, AP7315-25SA-7 application, or AP7315-25SA-7 equivalent, this page delivers verified electrical specs, thermal layout guidance, enable control thresholds, dropout behavior across temperature, and real-world load transient response data per DS38352 Rev. 2-2.

Technical Context

The AP7315-25SA-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable input - enabling fast turn-on/turn-off control with <0.5µs propagation delay. Its non-discharge architecture maintains output voltage during shutdown without sinking VOUT to GND.

It operates across 1.7V–5.25V input range with guaranteed 150mA output, achieves 210mV typical dropout at 150mA (2.5V output), and sustains ±30ppm/°C output voltage drift over –40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±1% at +25°C; ensures stable bias for RF power amplifiers and analog sensor front-ends.
Max Output Current	150mA continuous - sufficient for single-band LTE transceivers or image sensor analog cores.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding baseband processors.
Output Noise	60µV_rms (10Hz–100kHz) - preserves SNR in audio codecs and high-resolution ADC reference paths.
Quiescent Current	35µA typical - extends battery life in always-on IoT sensor nodes with periodic wake-up cycles.
Dropout Voltage	280mV max at 150mA (2.5V VOUT) - enables operation from single-cell Li-ion (3.0V min) down to end-of-discharge.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

SOT23-3 package (SA suffix) with 1.3mm × 1.3mm footprint, 0.95mm height, and exposed pad not connected internally - requires external GND connection via PCB copper pour for thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Input power supply	Accepts 1.7V–5.25V; must be decoupled with ≥0.47µF ceramic capacitor placed within 2mm of pin.
GND (Pin 1)	Ground reference	Low-impedance return path for input/output currents; connects to internal die substrate and thermal pad.
VOUT (Pin 2)	Regulated output	Delivers 2.5V ±1%; requires ≥0.47µF ceramic output capacitor adjacent to pin for stability under 150mA load steps.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz enables clean power delivery to RF ICs in noisy PMIC domains.
Ultra-low noise	60µV_rms (10Hz–100kHz) avoids modulation artifacts in sensitive analog signal chains.
Low quiescent current	35µA supports >1-year battery life in BLE/Wi-Fi edge sensors with 10s wake interval.
Fast load transient response	±30mV deviation for 1mA↔150mA step (VIN=3.5V); recovers in <10µs - critical for burst-mode radios.
Thermal protection	Internal foldback current limit (55mA short-circuit) prevents damage during sustained overload.

Applications

RF Power Amplifier Bias

Camera Image Sensor Core

Use Scenario: Supplies 2.5V bias to LTE/5G PA driver stages in smartphone front-end modules.

IC Role / Device Role / Timing Role: Low-noise LDO providing stable V_CC for GaAs HBT PAs, rejecting switching ripple from system PMIC.

Use Value: 60µV_rms noise prevents AM-to-PM distortion; 75dB PSRR isolates PA gain flatness from 2MHz buck converter harmonics.

Use Scenario: Powers analog core of 12MP CMOS image sensor in mobile camera subsystems.

IC Role / Device Role / Timing Role: Precision 2.5V rail for pixel ADC reference and analog signal chain, synchronized to frame exposure timing.

Use Value: ±1% output accuracy maintains consistent ADC full-scale voltage; low dropout allows operation during battery sag below 3.0V.

Wireless Adapter PHY Layer

Portable Media Player Audio Codec

Use Scenario: Delivers clean 2.5V to Wi-Fi 6/Bluetooth 5.2 PHY ICs in USB-C dongles and embedded modules.

IC Role / Device Role / Timing Role: Dedicated LDO for RF receiver LNA and mixer bias, enabled only during active link periods.

Use Value: 35µA quiescent current minimizes standby drain; enable pin allows host MCU to gate power during sleep states.

Use Scenario: Supplies 2.5V reference and analog I/O for stereo audio DAC/ADC in DAPs and Bluetooth speakers.

IC Role / Device Role / Timing Role: Low-noise voltage source for sigma-delta modulator clocks and headphone amplifier bias.

Use Value: 60µV_rms noise ensures >110dB THD+N performance; thermal pad layout reduces junction temp rise by 15°C at 100mA.

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 output, 6µA IQ, but only 60dB PSRR at 1kHz and 120µV_rms noise.	Lacks RF-grade noise/PSRR; suitable for digital I/O rails, not RF/analog cores.	Choose when ultra-low IQ dominates over noise/PSRR requirements.
Torex XC6206P252MR-G	150mA output, 1% accuracy, but 45dB PSRR at 1kHz and no enable pin.	No on/off control; limited rejection of mid-frequency switching noise.	Use where enable functionality and >70dB PSRR are not required.

Compared with MCP1700-2502E/TO and XC6206P252MR-G, the AP7315-25SA-7 uniquely balances RF-grade PSRR/noise, enable control, and SOT23-3 footprint - making it optimal for space-constrained RF/analog power domains where all three attributes are mandatory.

Availability

AP7315-25SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera image sensor core, wireless adapter PHY layer, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7315-25SA-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 manufacturer 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 product line - engineered specifically for noise-sensitive RF, imaging, and audio subsystems in portable and wireless devices.

FAQ

What is the minimum input voltage required for AP7315-25SA-7 to maintain regulation at 150mA?

The AP7315-25SA-7 requires VIN ≥ 2.78V to sustain 2.5V output at 150mA, based on its maximum dropout voltage of 280mV (2.5V + 0.28V). Below this, output voltage drops linearly with input - verified per Electrical Characteristics Table, Dropout Voltage row, for VOUT = 2.5V.

Can the EN pin be left floating, or does it require a pull-up/pull-down resistor?

The EN pin must never be left floating. It must be actively driven to ≥1.3V (logic high) to enable or ≤0.5V (logic low) to disable. If unused, tie EN directly to VIN - not through a resistor - to ensure reliable turn-on and avoid false shutdown due to leakage or noise coupling.

Is AP7315-25SA-7 qualified for automotive applications?

No - AP7315-25SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7315Q series) with PPAP capability and IATF 16949 manufacturing, but the SA-packaged AP7315-25SA-7 is rated for industrial temperature range (–40°C to +85°C) only.

What is the recommended PCB layout for thermal management of the SOT23-3 package?

Use ≥10mm² copper pour connected to Pin 1 (GND) beneath the device; avoid thermal relief on GND connections. Route VIN and VOUT traces ≥0.3mm wide, place CIN/COUT within 2mm of respective pins, and minimize loop area between GND–CIN–VIN and GND–COUT–VOUT to reduce EMI susceptibility.

AP7315-25SA-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

AP7315-25SA-7 FAQ

1.How can I place an order for AP7315-25SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-25SA-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 AP7315-25SA-7 reliable?

The price and inventory of AP7315-25SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-25SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-25SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-25SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-25SA-7?

AP7315-25SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-25SA-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 AP7315-25SA-7?

For technical support, including AP7315-25SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-25SA-7 requirements.

6.How does Aetrix verify that AP7315-25SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-25SA-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 AP7315-25SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-25SA-7?

All AP7315-25SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-25SA-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 AP7315-25SA-7 part is unused and in its original packaging.

Return procedure for AP7315-25SA-7:

1.Submit a request within 90 days.

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

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