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

Diodes Incorporated AP7315-15SA-7

Name: AP7315-15SA-7
Brand: Diodes Incorporated
SKU: AP7315-15SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-15SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-15SA-7.pdf

Description:: IC REG LINEAR 1.5V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,214

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Product details

Overview

AP7315-15SA-7 from Diodes Incorporated is a 1.5V 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. It features enable control, operates from 1.7V to 5.25V input, and is optimized for RF supply rails in space-constrained portable devices.

For engineers reviewing the AP7315-15SA-7 datasheet, AP7315-15SA-7 pinout, AP7315-15SA-7 application, or AP7315-15SA-7 equivalent, this page delivers verified specifications, SOT23-3 package layout guidance, real-world use cases in RF power management, and validated alternative LDOs for low-noise, low-I_Q designs.

Technical Context

The AP7315-15SA-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable logic. Its architecture delivers fast load transient response (<100µs settling) and stable regulation under 150mA load steps without requiring external compensation.

Designed for noise-sensitive analog and RF subsystems, it achieves 75dB ripple rejection at 1kHz and maintains ±1% output accuracy across –40°C to +85°C ambient, with dropout voltage as low as 280mV at 150mA for V_OUT = 1.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% - ensures stable biasing for RF amplifiers and analog sensors without external feedback.
Max Output Current	150mA - supports moderate-power RF modules and camera ISPs without thermal derating in SOT23-3.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise degradation in VCOs and LNAs.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby RF receivers.
Input Voltage Range	1.7V to 5.25V - compatible with single-cell Li-ion (3.0–4.2V), LiFePO₄, and regulated 3.3V/5V system rails.
Dropout Voltage	380mV max at 150mA - enables operation down to 1.88V input while maintaining 1.5V output.

Pinout & Package

AP7315-15SA-7 uses the SOT23-3 (SA) package: 1.45mm × 1.3mm footprint, 0.95mm height, thermal pad not present. Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT (top view). The EN pin is omitted in SA variant - device is always enabled.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Power input	Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed within 2mm of pin for stability.
GND	Ground reference	Low-impedance return path for input/output currents; must connect directly to main PCB ground plane.
VOUT	Regulated output	Delivers 1.5V ±1%; output capacitor (0.47µF ceramic) must be placed adjacent to minimize ESR-induced noise.

Key Features

Feature	Design Value
High PSRR (75dB @ 1kHz)	Rejects noise from switching regulators on shared input rails, preserving signal integrity in RF front-ends.
Ultra-low output noise (60µV_rms)	Prevents added phase noise in local oscillators and maintains SNR in ADC reference supplies.
±1% output accuracy over temperature	Ensures consistent bias point for analog circuits across industrial temperature range without calibration.
35µA quiescent current	Reduces no-load power loss by >50% vs. legacy LDOs, critical for battery-powered IoT endpoints.
150mA guaranteed output	Sustains full rated current with <380mV dropout, enabling compact designs without parallel regulators.

Applications

RF Power Amplifier Bias

Camera Image Signal Processor (ISP) Core Supply

Use Scenario: Providing clean, stable 1.5V bias to GaAs pHEMT power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated V_PA rail decoupled from noisy system DC/DC converters.

Use Value: 60µV_rms noise prevents AM-to-PM conversion; 75dB PSRR isolates PA from baseband switching noise.

Use Scenario: Supplying core logic voltage to image signal processors in smartphone camera modules.

IC Role / Device Role / Timing Role: Primary 1.5V regulator for ISP digital core, enabling low-power burst-mode operation.

Use Value: 35µA I_Q minimizes standby drain; ±1% accuracy ensures timing margin compliance across temperature.

Wireless Audio Codec Reference

Low-Power Sensor Node MCU Core

Use Scenario: Generating ultra-clean 1.5V reference for high-resolution audio DACs in Bluetooth earbuds.

IC Role / Device Role / Timing Role: Dedicated LDO for DAC analog section, isolated from digital switching noise.

Use Value: 60µV_rms noise meets THD+N < -105dB requirements; 1.7V min input supports single-cell Li-ion operation.

Use Scenario: Powering ARM Cortex-M0+ microcontroller cores in battery-operated environmental sensors.

IC Role / Device Role / Timing Role: Main V_CORE supply enabling deep-sleep modes with sub-µA system leakage.

Use Value: 35µA I_Q extends 10-year battery life; 150mA headroom supports brief radio transmit bursts.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, low-I_Q LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1502E/TT	1.5V ±2% accuracy, 6µA I_Q, 100mA output, 65dB PSRR @ 1kHz	Lower I_Q but reduced PSRR and output current; suitable only for ultra-low-power sensor bias, not RF.	Select when I_Q < 10µA is mandatory and RF noise immunity is secondary.
Torex XC6206P152MR-G	1.5V ±2% accuracy, 1µA I_Q, 150mA output, 55dB PSRR @ 1kHz	Superior I_Q but significantly lower PSRR and higher noise (120µV_rms) - inadequate for RF/ADC rails.	Choose only for non-critical digital core supplies where lowest possible standby current dominates.

Compared with MCP1700T-1502E/TT and XC6206P152MR-G, AP7315-15SA-7 uniquely balances 75dB PSRR, 60µV_rms noise, and 150mA drive in a 3-pin SOT23 - making it the only option qualified for RF and precision analog supply roles without performance trade-offs.

Availability

AP7315-15SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP core supply, and wireless audio codec reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7315-15SA-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 product line, engineered specifically for noise-sensitive RF, imaging, and audio subsystems in portable electronics.

FAQ

Does AP7315-15SA-7 include an enable pin?

No. The SA suffix denotes the SOT23-3 package variant with no EN pin - the regulator is permanently enabled. This simplifies layout for always-on rails but removes software-controlled shutdown capability. For enable functionality, select AP7315-15W5-7 (SOT25) or AP7315-15FS4-7B (X2-DFN1010-4).

What is the minimum input voltage required to maintain 1.5V output at 150mA?

The maximum dropout voltage at 150mA is 380mV for the 1.5V version. Therefore, the minimum input voltage is 1.5V + 0.38V = 1.88V. Below this, output voltage drops below specification. This allows operation from partially discharged single-cell Li-ion batteries (down to ~2.5V nominal).

Can AP7315-15SA-7 replace AP7315-15SR-7 in existing designs?

Yes, electrically identical - both are 1.5V SOT23 variants. However, SR uses a different marking code (5DD vs. 15D) and is qualified per AEC-Q100 Grade 1 for automotive. SA is commercial-grade. Substitution is acceptable for non-automotive applications but invalidates AEC-Q100 compliance if used in automotive systems.

Why does AP7315-15SA-7 specify 60µV_rms noise but list no peak-to-peak value?

The 60µV_rms figure is measured across 10Hz–100kHz bandwidth per JEDEC JESD22-A108 standard, which reflects broadband noise relevant to RF/ADC performance. Peak-to-peak values are not specified because they depend heavily on measurement bandwidth and oscilloscope settings, making rms the industry-standard metric for comparing LDO noise impact on sensitive analog circuits.

AP7315-15SA-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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.49V @ 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

AP7315-15SA-7 FAQ

1.How can I place an order for AP7315-15SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-15SA-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 AP7315-15SA-7 reliable?

The price and inventory of AP7315-15SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-15SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-15SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-15SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-15SA-7?

AP7315-15SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-15SA-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 AP7315-15SA-7?

For technical support, including AP7315-15SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-15SA-7 requirements.

6.How does Aetrix verify that AP7315-15SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-15SA-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 AP7315-15SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-15SA-7?

All AP7315-15SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-15SA-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 AP7315-15SA-7 part is unused and in its original packaging.

Return procedure for AP7315-15SA-7:

1.Submit a request within 90 days.

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

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