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

Diodes Incorporated AP7315-12SA-7

Name: AP7315-12SA-7
Brand: Diodes Incorporated
SKU: AP7315-12SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-12SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-12SA-7.pdf

Description:: IC REG LINEAR 1.2V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,627

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Product details

Overview

AP7315-12SA-7 from Diodes Incorporated is a 1.2V 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. It features enable control, operates from 1.7V to 5.25V input, and is optimized for RF supply rails in space-constrained portable electronics.

For engineers reviewing the AP7315-12SA-7 datasheet, AP7315-12SA-7 pinout, AP7315-12SA-7 application, or AP7315-12SA-7 equivalent, key selection criteria include dropout voltage at 150mA (max 0.50V for 1.1V ≤ V_OUT < 1.5V), thermal performance in SOT23 package, EN logic thresholds (0.5V low / 1.3V high), and stability with 0.47µF ceramic output capacitance.

Technical Context

The AP7315-12SA-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit protection. Its enable input directly controls the pass transistor gate, supporting fast turn-on/turn-off transitions without external circuitry.

Designed for low-noise biasing of RF front-ends and camera sensors, it delivers stable 1.2V output under load transients up to 150mA while maintaining 75dB ripple rejection at 1kHz and sub-60µV_rms integrated noise-critical for sensitive analog signal chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2V ±1% at +25°C; ensures precise core/bias rail for 1.2V logic or RF ICs
Max Output Current	150mA guaranteed; supports moderate-power peripherals like Wi-Fi/BT baseband or image sensor interfaces
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC-DC converters feeding noisy power domains
Output Noise	60µV_rms (10Hz–100kHz); minimizes phase noise impact on VCOs and ADC reference stability
Quiescent Current	35µA typical; enables ultra-low-power standby modes in battery-operated devices
Dropout Voltage	0.50V max at 150mA (for 1.1V–1.5V V_OUT); allows operation down to 1.7V input, compatible with single-cell Li-ion discharge profiles
Input Voltage Range	1.7V to 5.25V; accommodates wide-input sources including USB, boost regulators, or multi-cell batteries

Pinout & Package

AP7315-12SA-7 is housed in a 3-pin SOT23 package (SA suffix) with 1.3mm × 1.3mm footprint and 0.95mm height. Thermal pad is absent; PCB copper pour under device is not required but recommended for enhanced heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VOUT (Pin 2)	Regulated output	Delivers stable 1.2V to load; requires 0.47µF ceramic capacitor placed adjacent to pin for stability
GND (Pin 1)	Power ground reference	Low-impedance return path; must connect directly to main system ground plane to minimize noise coupling
VIN (Pin 3)	Unregulated input	Accepts 1.7V–5.25V supply; requires 0.47µF decoupling capacitor near pin to suppress input transients
EN (Not present)	Enable control	Not implemented in SA variant; regulator is always enabled-no external pull-up needed

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz enables clean power delivery in mixed-signal SoC environments with shared power rails
Ultra-low noise	60µV_rms (10Hz–100kHz) meets stringent requirements for RF synthesizers and high-resolution ADCs
Low quiescent current	35µA typical extends battery life in always-on sensor nodes and wearable standby modes
Wide input range	1.7V–5.25V supports direct connection to Li-ion, USB, or buck-boost outputs without intermediate regulation
±1% output accuracy	Ensures reliable operation of 1.2V I/O standards and core voltages across temperature and line/load variations

Applications

RF Power Amplifier Bias

Camera Image Sensor Core Supply

Use Scenario: Providing ultra-low-noise 1.2V bias to GaAs or SiGe RF power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise LDO delivering stable V_PA bias; no timing function-pure analog power conditioning.

Use Value: 60µV_rms noise prevents AM-to-PM conversion in PA stages, preserving EVM and spectral mask compliance.

Use Scenario: Powering the digital core of CMOS image sensors in smartphone cameras during active capture mode.

IC Role / Device Role / Timing Role: Fixed-output LDO supplying 1.2V core logic; supports fast wake/sleep transitions via system-level enable control (not used in SA variant).

Use Value: ±1% accuracy ensures consistent pixel clock generation and ADC reference stability across temperature.

Wi-Fi/Bluetooth Baseband IC

Portable Media Player Audio Codec

Use Scenario: Regulating 1.2V supply for WLAN/BT SoC baseband processors in compact IoT modules.

IC Role / Device Role / Timing Role: Primary voltage regulator for digital baseband domain; operates continuously during wireless link activity.

Use Value: 75dB PSRR isolates baseband logic from switching noise generated by co-located PMU DC-DC converters.

Use Scenario: Delivering clean 1.2V to stereo audio codecs in portable media players with flash storage and LCD displays.

IC Role / Device Role / Timing Role: Dedicated LDO for audio subsystem power; decouples codec analog/digital sections from noisy display drivers.

Use Value: 35µA quiescent current reduces idle power draw, extending playback time between charges.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-1202E/TO	1.2V fixed, 250mA output, 6µA IQ, but only 60dB PSRR at 1kHz and 120µV_rms noise	Lacks RF-grade noise/PSRR performance; suitable for non-sensitive digital loads only	Choose when ultra-low IQ dominates over noise/PSRR requirements
Torex XC6210B122MR-G	1.2V fixed, 150mA, 70dB PSRR @ 1kHz, 45µV_rms noise, but requires 1µF minimum C_OUT	Higher output capacitance requirement increases BOM cost and board area vs. AP7315's 0.47µF support	Prefer when lower noise is critical and extra 0.53µF capacitance is acceptable

Compared with MCP1700-1202E/TO, AP7315-12SA-7 trades 3µA higher IQ for 15dB better PSRR and half the output noise-essential for RF/analog integrity. Against XC6210B122MR-G, it offers identical current rating and superior PSRR while reducing required output capacitance by >50%, easing layout in dense portable PCBs.

Availability

AP7315-12SA-7 is available at Aetrix Electronics and suitable for RF supply, camera sensor bias, and portable media player power management requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP7315-12SA-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 consumer, computing, communications, and industrial markets.

The AP7315 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for noise-sensitive portable electronics where small size, low IQ, and exceptional PSRR/noise performance are mandatory.

FAQ

What is the maximum allowable input voltage for AP7315-12SA-7?

The absolute maximum input voltage is 6.0V per the datasheet Absolute Maximum Ratings table. However, the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may cause permanent damage or accelerated parametric drift, even if within the 6.0V stress limit. Always maintain VIN ≤ 5.25V in normal operation.

Does AP7315-12SA-7 include an enable pin?

No. The SA suffix denotes the SOT23 package variant without enable functionality-the EN pin is omitted. This version is permanently enabled; VIN applied powers VOUT immediately. For enable control, select AP7315-12W5-7 (SOT25) or AP7315-12FS4-7B (X2-DFN1010-4), both of which include Pin 3 as EN.

What output capacitor value is required for stability?

A minimum 0.47µF ceramic capacitor is required between VOUT and GND for guaranteed stability across all operating conditions. The datasheet confirms stability with this value and specifies that larger capacitors (e.g., 1µF–10µF) may be used for improved transient response, provided ESR remains below 100mΩ.

How does thermal performance compare between SA and FS4 packages?

The SOT23 (SA) package has a junction-to-ambient thermal resistance (θ_JA) of 250°C/W on a standard JEDEC 2-layer board, while the X2-DFN1010-4 (FS4) achieves 180°C/W due to its exposed thermal pad. At 150mA load and 1.7V dropout, SA dissipates ~255mW-requiring careful copper area design. FS4 is preferred for higher ambient temperatures or sustained full-load operation.

AP7315-12SA-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):: 1.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.64V @ 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

AP7315-12SA-7 FAQ

1.How can I place an order for AP7315-12SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-12SA-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 AP7315-12SA-7 reliable?

The price and inventory of AP7315-12SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-12SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-12SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-12SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-12SA-7?

AP7315-12SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-12SA-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 AP7315-12SA-7?

For technical support, including AP7315-12SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-12SA-7 requirements.

6.How does Aetrix verify that AP7315-12SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-12SA-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 AP7315-12SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-12SA-7?

All AP7315-12SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-12SA-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 AP7315-12SA-7 part is unused and in its original packaging.

Return procedure for AP7315-12SA-7:

1.Submit a request within 90 days.

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

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