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

Diodes Incorporated AP7315D-29W5-7

Name: AP7315D-29W5-7
Brand: Diodes Incorporated
SKU: AP7315D-29W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315D-29W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7315D-29W5-7.pdf

Description:: IC REG LINEAR 2.9V 150MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315D-29W5-7 from Diodes Incorporated is a 2.9V fixed-output, 150mA low-dropout linear regulator with enable control, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and delivers ultra-low quiescent current (35µA typ) for RF supply and portable media player power rails.

For engineers reviewing the AP7315D-29W5-7 datasheet, AP7315D-29W5-7 pinout, AP7315D-29W5-7 application, or AP7315D-29W5-7 equivalent, this page provides verified package mapping (SOT25), terminal functions, real-world load transient behavior, discharge-capable LDO architecture, and validated alternatives for battery-powered edge devices requiring stable 2.9V biasing.

Technical Context

The AP7315D-29W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active pull-down transistor for fast output discharge during shutdown. Its internal resistor network fixes V_OUT at 2.9V with ±1% tolerance over -40°C to +85°C ambient.

It supports 150mA continuous output with dropout as low as 210mV at 2.9V/150mA, achieves 75dB ripple rejection at 1kHz under 30mA load, and maintains stability with 0.47µF ceramic C_IN/C_OUT. The EN pin accepts logic-level control (V_IL ≤ 0.5V, V_IH ≥ 1.3V) and draws only 0.01µA in shutdown.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.9V ±1% - ensures stable bias for 3V-class RF ICs and camera sensors without external feedback.
Max Output Current	150mA - sufficient to power baseband processors, Bluetooth SoCs, or dual-camera modules in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from PMICs or DC-DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in analog front-ends and high-resolution ADC references.
Quiescent Current	35µA typical - extends battery life in always-on sensor nodes and standby-mode wireless adapters.
Dropout Voltage	210mV at 150mA - enables operation down to 3.11V input, supporting single-cell Li-ion (3.0–4.2V) systems.
Enable Threshold	V_EN(H) ≥ 1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting.

Pinout & Package

SOT25 package (5-pin, 2.9mm × 2.8mm × 1.3mm) with exposed thermal pad; pin 1 = VIN, pin 2 = GND, pin 3 = EN, pin 4 = NC, pin 5 = VOUT. NC pin recommended tied to GND for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 1)	Input power supply connection	Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling capacitor placed adjacent to minimize input impedance.
GND (Pin 2)	Power ground reference	Must connect directly to PCB ground plane; serves as return path for both input and output currents.
EN (Pin 3)	Active-high enable control	Drives regulator ON/OFF; floating state prohibited; 0.01µA shutdown current enables ultra-low-power sleep modes.
NC (Pin 4)	No internal connection	Not bonded; tie to GND to maximize copper area for thermal dissipation and reduce EMI coupling.
VOUT (Pin 5)	Regulated output voltage	Delivers 2.9V ±1% to load; requires 0.47µF ceramic capacitor near pin to ensure stability and transient response.

Key Features

Feature	Design Value
Integrated discharge FET	30Ω on-resistance enables rapid VOUT discharge (<100µs) upon shutdown-critical for multi-rail sequencing in portable video systems.
Ultra-low noise output	60µV_rms (10Hz–100kHz) eliminates need for post-LDO filtering in RF supply chains and audio codec bias paths.
High PSRR across frequency	75dB @ 1kHz, >60dB up to 100kHz-rejects noise from buck converters operating at 500kHz–2MHz switching frequencies.
Wide input voltage range	1.7V–5.25V supports direct connection to single-cell Li-ion, USB VBUS, or intermediate 3.3V/5V rails without pre-regulation.
Thermal-enhanced SOT25	Exposed thermal pad reduces θ_JA to 190°C/W-enables 150mA operation at +70°C ambient without derating.

Applications

RF Power Amplifier Bias

Camera Sensor Core Supply

Use Scenario: Providing clean 2.9V bias to GaAs pHEMT power amplifiers in LTE/Wi-Fi front-end modules.

IC Role / Device Role / Timing Role: Low-noise LDO delivering stable V_{CC_PA} with minimal phase noise contribution to transmit chain.

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

Use Scenario: Powering CIS image sensor core logic and analog pixel array in smartphone rear cameras.

IC Role / Device Role / Timing Role: Primary 2.9V supply enabling low-dark-current operation and high dynamic range capture.

Use Value: ±1% accuracy maintains consistent ADC reference scaling; fast load transient response prevents frame corruption during burst capture.

Wireless Adapter Baseband

Portable Media Player Audio Codec

Use Scenario: Supplying 2.9V to Bluetooth 5.0/LE baseband processors in USB-C dongles and earbud charging cases.

IC Role / Device Role / Timing Role: Always-on LDO with EN-controlled deep-sleep mode for firmware updates and connection handshaking.

Use Value: 35µA quiescent current extends case battery life; 150mA headroom supports peak BLE packet transmission bursts.

Use Scenario: Generating 2.9V for stereo DAC/ADC and headphone driver stages in lossless audio players.

IC Role / Device Role / Timing Role: Ultra-low-noise analog rail decoupling critical for THD+N < -105dB performance.

Use Value: 60µV_rms noise floor avoids audible hiss; discharge FET prevents pop/click during playback start/stop transitions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-2902E/TT	250mA rated, 6µA I_Q, no discharge FET, SOT23-3 package	Lacks active output discharge; unsuitable for multi-rail sequencing where VOUT must collapse rapidly	Prefer when lowest quiescent current is primary requirement and discharge is not needed.
Torex XC6210B292MR-G	200mA rated, 1.1µA I_Q, 45dB PSRR @ 1kHz, SOT25 package, no discharge	Lower PSRR compromises noise rejection in RF-sensitive designs; no discharge capability limits use in hot-plug interfaces	Select only for ultra-low-power sensor nodes where RF immunity is secondary to battery longevity.

Compared with MCP1700T-2902E/TT and XC6210B292MR-G, the AP7315D-29W5-7 uniquely combines 150mA output, 75dB PSRR, 60µV_rms noise, and integrated discharge in SOT25-making it optimal for compact RF and imaging subsystems demanding coordinated power sequencing and spectral purity.

Availability

AP7315D-29W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera sensor core supply, wireless adapter baseband, and portable media player audio codec applications requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for AP7315D-29W5-7 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 battery-powered portable electronics where clean, efficient, and sequenced power delivery is critical to RF performance and imaging fidelity.

FAQ

What is the function of the NC pin (Pin 4) in the SOT25 package?

Pin 4 is not internally connected and serves no electrical function. Diodes Incorporated recommends tying it to GND to increase PCB copper area for improved thermal dissipation and reduced EMI susceptibility. Leaving it floating may degrade thermal performance and radiated emissions in dense layouts.

Does AP7315D-29W5-7 include an output discharge feature, and how does it operate?

Yes-the "D" suffix denotes integrated active discharge. When EN is pulled low, an internal 30Ω NMOS FET connects VOUT to GND, discharging output capacitance within ~100µs. This prevents residual voltage from interfering with downstream logic sequencing or causing pop/click in audio paths during power-down.

Can AP7315D-29W5-7 be used with input voltages below 1.7V?

No-1.7V is the absolute minimum specified input voltage. Operation below this threshold risks regulation loss, increased dropout, and potential instability. For sub-1.7V applications (e.g., coin-cell powered devices), consider Diodes' AP2204K-29 or AP7361D-29 variants with lower V_IN(min) ratings.

What is the maximum allowable output capacitance for stable operation?

The AP7315D-29W5-7 is stable with ceramic capacitors ≥0.47µF and ESR ≤100mΩ. While larger values (e.g., 10µF–47µF) improve transient response, they do not compromise stability. Avoid tantalum or aluminum electrolytics due to high ESR and aging effects that may induce oscillation.

AP7315D-29W5-7 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):: 2.9V

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

AP7315D-29W5-7 FAQ

1.How can I place an order for AP7315D-29W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315D-29W5-7 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 AP7315D-29W5-7 reliable?

The price and inventory of AP7315D-29W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-29W5-7 is usually 5 days.

3.What payment methods are accepted for AP7315D-29W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-29W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315D-29W5-7?

AP7315D-29W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315D-29W5-7 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 AP7315D-29W5-7?

For technical support, including AP7315D-29W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-29W5-7 requirements.

6.How does Aetrix verify that AP7315D-29W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7315D-29W5-7 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 AP7315D-29W5-7 meets industry standards.

7.What is the process for return or replacement of AP7315D-29W5-7?

All AP7315D-29W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-29W5-7, 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 AP7315D-29W5-7 part is unused and in its original packaging.

Return procedure for AP7315D-29W5-7:

1.Submit a request within 90 days.

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

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