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

Diodes Incorporated AP7315-23SA-7

Name: AP7315-23SA-7
Brand: Diodes Incorporated
SKU: AP7315-23SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-23SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-23SA-7.pdf

Description:: IC REG LINEAR 2.3V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,206

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Product details

Overview

AP7315-23SA-7 from Diodes Incorporated is a 2.3V fixed-output, 150mA low-dropout linear regulator featuring ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It operates from 1.7V to 5.25V input, uses CMOS process technology, and integrates enable control for power sequencing in portable RF supply rails.

For engineers reviewing the AP7315-23SA-7 datasheet, AP7315-23SA-7 pinout, AP7315-23SA-7 application, or AP7315-23SA-7 equivalent, this LDO is selected for precision low-noise biasing of RF transceivers, camera sensor analog blocks, and portable media player core logic where stable 2.3V rail integrity under fast load transients is critical.

Technical Context

The AP7315-23SA-7 implements a CMOS-based error amplifier with internal voltage reference and current-limit protection, enabling precise regulation without external feedback components. Its architecture supports fast line/load transient response due to low output impedance and optimized internal compensation.

Enable functionality is implemented via a dedicated EN pin (Pin 3) with defined logic thresholds: high ≥1.3V enables regulation; low ≤0.5V forces shutdown with 0.01µA standby current. The device lacks auto-discharge (non-D variant), requiring external circuitry for VOUT discharge during disable.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.3V ±1% at +25°C; ensures stable bias for 2.3V-tolerant RF ICs and image sensors.
Max Output Current	150mA guaranteed; supports moderate-power analog subsystems like camera ISP cores or Bluetooth baseband.
PSRR	75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µVrms (10Hz–100kHz); minimizes phase noise degradation in RF local oscillators and ADC reference paths.
Quiescent Current	35µA typical; extends battery life in always-on sensor nodes and standby modes of portable devices.
Dropout Voltage	0.34V max at 150mA (for 2.3V output); enables operation from single-cell Li-ion (3.0V min) down to ~2.6V input.
Input Voltage Range	1.7V to 5.25V; compatible with wide-input PMIC outputs and multi-cell battery configurations.

Pinout & Package

AP7315-23SA-7 is packaged in SOT23 (SA), a 3-pin surface-mount package with 1.3mm × 2.9mm footprint and 0.95mm height. Thermal performance is enhanced by direct GND pad connection to PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Power Input	Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance and suppress supply glitches.
GND (Pin 1)	Ground Reference	Primary return path for load current and regulator internal circuits; must connect to low-impedance PCB ground plane.
VOUT (Pin 2)	Regulated Output	Delivers stable 2.3V ±1%; output capacitor (0.47µF ceramic) required for stability and transient response.
EN (Pin -)	Enable Control	Not present on SA package; device is permanently enabled - no external enable logic required.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz enables clean power delivery in noisy mixed-signal environments (e.g., co-located Wi-Fi/BT radios).
Ultra-Low Noise	60µVrms (10Hz–100kHz) preserves signal integrity in analog front-ends of cameras and audio codecs.
Tight Output Accuracy	±1% over temperature ensures reliable operation of voltage-sensitive logic and RF bias circuits.
Low Quiescent Current	35µA typical allows >1-year battery life in always-on IoT sensor applications with 200mAh coin cells.
Wide Input Range	1.7–5.25V supports direct connection to buck converter outputs or single/dual-cell battery inputs.

Applications

RF Power Amplifier Bias

CMOS Image Sensor Core Supply

Use Scenario: Providing clean, stable 2.3V bias to GaAs pHEMT driver stages in 2.4GHz Wi-Fi modules.

IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated V_PA rail; replaces noisier switching solutions near sensitive RF paths.

Use Value: 60µVrms noise prevents AM-to-PM conversion in PA output, maintaining EVM <3% at 54Mbps OFDM.

Use Scenario: Powering analog pixel array and column ADC circuitry in 5MP mobile camera modules.

IC Role / Device Role / Timing Role: Precision voltage source for sensor analog core; rejects noise from digital ISP domain.

Use Value: ±1% accuracy ensures consistent pixel response across temperature; 75dB PSRR suppresses digital switching artifacts.

Portable Media Player Core Logic

Bluetooth Baseband Processor Supply

Use Scenario: Supplying 2.3V to ARM Cortex-M4 MCU core in handheld audio players with 8-hour battery runtime.

IC Role / Device Role / Timing Role: Primary core rail regulator; interfaces with battery management IC and USB charging controller.

Use Value: 35µA quiescent current extends standby time; 0.34V dropout enables full utilization of Li-ion cell voltage range.

Use Scenario: Delivering regulated 2.3V to CSR8510 Bluetooth SoC RF/analog sections in wireless earbuds.

IC Role / Device Role / Timing Role: Dedicated LDO for RF synthesizer and receiver chain; isolated from noisy digital supply.

Use Value: 75dB PSRR at 2.4GHz harmonics reduces receiver desensitization; SOT23 footprint saves space in compact TWS PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2302E/TO	2.3V fixed, 250mA output, 6µA IQ, but only 60dB PSRR @ 1kHz and 120µVrms noise.	Limited in RF-sensitive designs due to lower PSRR/noise performance; suitable for non-critical digital I/O rails.	Select when ultra-low IQ dominates over noise/PSRR requirements, e.g., long-life remote sensors.
TPS7A0523PDBVR	2.3V fixed, 200mA, 25µA IQ, 70dB PSRR @ 1kHz, 45µVrms noise, but requires minimum 1µF output capacitance.	Better noise than AP7315 but larger COUT requirement increases board area; no EN pin in SOT23 variant.	Prefer for battery-constrained apps needing lowest IQ; verify layout compatibility with 1µF ceramic placement constraints.

Compared with MCP1700-2302E/TO and TPS7A0523PDBVR, the AP7315-23SA-7 delivers superior PSRR and balanced noise/IQ trade-off in the smallest SOT23 footprint, making it optimal for space-constrained RF and imaging subsystems where 2.3V rail purity is non-negotiable.

Availability

AP7315-23SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, CMOS image sensor core supply, and portable media player core logic requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AP7315-23SA-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, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.

The AP7315 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for powering noise-sensitive analog and RF circuitry in portable and wireless applications.

FAQ

Is AP7315-23SA-7 pin-compatible with other SOT23 LDOs?

No - AP7315-23SA-7 uses a non-standard SOT23 pinout: Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN. Most competing SOT23 LDOs use Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT. PCB layout must follow Diodes' documented top-view assignment to avoid functional failure.

Does AP7315-23SA-7 include output discharge functionality?

No - the "SA" suffix denotes the non-discharge variant (AP7315, not AP7315D). When disabled, VOUT remains floating and does not actively discharge. External bleed resistors or MOSFETs are required if rapid VOUT decay is needed during shutdown.

What is the minimum recommended input capacitor for AP7315-23SA-7?

A 0.47µF X5R/X7R ceramic capacitor placed within 2mm of VIN and GND pins is mandatory per Diodes' design guidelines. Larger values (e.g., 1µF) improve transient response but do not replace the 0.47µF minimum for stability across temperature and process variation.

Can AP7315-23SA-7 operate with input voltage below 2.3V?

Yes - the device functions down to 1.7V input, but output regulation is only guaranteed when VIN ≥ VOUT + dropout voltage (≥2.64V for 150mA load). Below that, VOUT drops linearly with VIN; this behavior is leveraged in brown-out detection circuits.

AP7315-23SA-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):: 2.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.38V @ 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

AP7315-23SA-7 FAQ

1.How can I place an order for AP7315-23SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-23SA-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 AP7315-23SA-7 reliable?

The price and inventory of AP7315-23SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-23SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-23SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-23SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-23SA-7?

AP7315-23SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-23SA-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 AP7315-23SA-7?

For technical support, including AP7315-23SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-23SA-7 requirements.

6.How does Aetrix verify that AP7315-23SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-23SA-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 AP7315-23SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-23SA-7?

All AP7315-23SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-23SA-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 AP7315-23SA-7 part is unused and in its original packaging.

Return procedure for AP7315-23SA-7:

1.Submit a request within 90 days.

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

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