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

Diodes Incorporated AP7315D-15W5-7

Name: AP7315D-15W5-7
Brand: Diodes Incorporated
SKU: AP7315D-15W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315D-15W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7315D-15W5-7.pdf

Description:: IC REG LINEAR 1.5V 150MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315D-15W5-7 from Diodes Incorporated is a 150mA low-dropout linear regulator with fixed 1.5V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, built-in discharge function, and operates from 1.7V to 5.25V input - optimized for RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7315D-15W5-7 datasheet, AP7315D-15W5-7 pinout, AP7315D-15W5-7 application, or AP7315D-15W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for low-noise, high-PSRR LDO selection in space-constrained battery-powered systems.

Technical Context

The AP7315D-15W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path activated during shutdown. Its architecture enables fast load transient response (<100µs settling) and stable operation with 0.47µF ceramic capacitors on both input and output.

Unlike non-discharge variants (e.g., AP7315-15W5-7), the "D" suffix denotes an internal NMOS discharge switch (R_ON ≈ 30Ω) that actively pulls VOUT to GND when EN is low - eliminating residual output voltage and preventing back-powering of upstream circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±1% - ensures stable core bias for low-voltage RF ICs without external feedback network.
Max Output Current	150mA continuous - sufficient for powering single-band RF transceivers or sensor signal chains.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails.
Output Noise	60µV_rms (10Hz–100kHz) - preserves SNR in analog front-ends and ADC reference paths.
Quiescent Current	35µA typical - extends battery life in always-on monitoring modes of IoT edge nodes.
Dropout Voltage	0.38V max at 150mA - enables regulation from 1.88V input, compatible with single-cell LiFePO₄ or dual-cell alkaline sources.
Enable Threshold	V_EN(H) ≥ 1.3V, V_EN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm) package with exposed thermal pad. Requires PCB copper pour connected to GND for thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 – VIN	Input power supply	Accepts 1.7V–5.25V; must be decoupled with ≥0.47µF ceramic capacitor placed adjacent to pin.
2 – GND	Ground reference	Primary return path for input/output currents; connects to internal thermal pad for heat transfer.
3 – EN	Enable control input	Active-high logic; drives regulator ON/OFF; floating state is undefined - tie to VIN if unused.
4 – NC	No-connect terminal	Internally unconnected; recommended to tie to GND to maximize PCB copper area for thermal conduction.
5 – VOUT	Regulated output	Delivers 1.5V ±1%; includes active discharge path to GND when EN = low.

Key Features

Feature	Design Value
Active output discharge	30Ω NMOS switch discharges VOUT to GND within microseconds upon disable - prevents latch-up in cascaded power domains.
Ultra-low noise output	60µV_rms over 10Hz–100kHz band - meets stringent noise floor requirements for RF synthesizer VCO supplies.
High PSRR at low frequency	75dB rejection at 1kHz - mitigates ripple from buck converter switching frequencies and their harmonics.
Low quiescent current	35µA typical - enables >1-year battery life in BLE beacon applications with 200mAh coin cell.
Wide input voltage range	1.7V–5.25V - supports direct connection to Li-ion, LiFePO₄, or regulated 3.3V/5V system rails without pre-regulation.

Applications

RF Power Amplifier Bias

Wireless Transceiver Core Supply

Use Scenario: Providing clean, stable 1.5V bias to GaAs pHEMT driver stages in 2.4GHz Wi-Fi modules.

IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated rail independent of noisy switched-mode power supply.

Use Value: Reduces AM-to-PM distortion by maintaining constant V_DS under dynamic RF load, improving EVM by >3dB.

Use Scenario: Powering digital baseband and analog front-end sections of Bluetooth 5.0 SoCs.

IC Role / Device Role / Timing Role: Primary core voltage regulator enabling sleep/wake transitions via EN pin control.

Use Value: Active discharge eliminates hold-up voltage, allowing immediate reset assertion and reducing wake latency by 12µs.

Camera Sensor Analog Rail

IoT Edge Node Reference Supply

Use Scenario: Supplying 1.5V to CIS analog pixel array and column ADC in compact mobile camera modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating image sensor from digital switching noise.

Use Value: Limits fixed-pattern noise (FPN) increase to <0.5 LSB across temperature, preserving 12-bit linearity.

Use Scenario: Generating precision 1.5V reference for ultra-low-power SAR ADCs in environmental sensor nodes.

IC Role / Device Role / Timing Role: Stable voltage source for ADC internal reference and bias generation.

Use Value: Enables 10.2-bit effective resolution at 10ksps sampling rate with <±0.8mV total error over -40°C to +85°C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7315-15W5-7	No internal discharge path; VOUT floats after shutdown.	Acceptable where back-powering is not a concern and faster startup is prioritized.	Select only if system-level discharge is handled externally (e.g., pull-down resistor or MOSFET).
MCP1700-1502E/TO	150mA, 1.5V, 6µA I_Q, no EN pin, no discharge, TO-92 package.	Limited to low-density through-hole designs; lacks enable control and active discharge.	Use only in cost-sensitive, non-portable applications where board space and dynamic control are secondary.

Compared with AP7315-15W5-7, the D-suffix variant adds critical discharge functionality without sacrificing noise or PSRR performance; versus MCP1700, it trades ultra-low I_Q for essential enable control, SOT25 footprint, and integrated discharge - making it superior for modern compact wireless designs.

Availability

AP7315D-15W5-7 is available at Aetrix Electronics and suitable for RF supply, wireless transceiver core, camera sensor analog rail, and IoT edge node reference supply applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7315D-15W5-7 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, with design centers across Asia, Europe, and the US, and manufacturing certified to IATF 16949.

The AP7315 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for noise-sensitive portable electronics where PSRR, output accuracy, and small-footprint packaging are critical.

FAQ

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

Pin 4 is internally not connected. Diodes recommends tying it to GND on the PCB to maximize copper area for thermal conduction from the exposed thermal pad. This improves heat dissipation without introducing electrical risk, as the pin has no internal bond wire or silicon connection.

Does the AP7315D-15W5-7 require an output capacitor, and what type is recommended?

Yes - a minimum 0.47µF ceramic capacitor is required between VOUT and GND for stability and transient response. X5R or X7R dielectrics are preferred for low ESR and stable capacitance over temperature and DC bias. Larger values (e.g., 2.2µF) further improve load-step immunity.

How does the active discharge function behave during shutdown?

When EN is pulled low, the internal 30Ω NMOS switch connects VOUT to GND, discharging the output capacitor rapidly. Typical discharge time is <50µs for a 1µF COUT. This prevents residual voltage from interfering with downstream logic states or causing unintended device wake-up.

Can the AP7315D-15W5-7 operate with input voltage below 1.7V?

No - the absolute minimum input voltage is 1.7V per datasheet specifications. Below this, regulation fails and output voltage collapses. For sub-1.7V operation, consider Diodes' AP2204K-15 or AP7215 series, which support down to 0.8V input but with reduced PSRR and higher I_Q.

AP7315D-15W5-7 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):: 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:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

AP7315D-15W5-7 FAQ

1.How can I place an order for AP7315D-15W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315D-15W5-7 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-15W5-7 reliable?

The price and inventory of AP7315D-15W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-15W5-7 is usually 5 days.

3.What payment methods are accepted for AP7315D-15W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-15W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315D-15W5-7?

AP7315D-15W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315D-15W5-7 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-15W5-7?

For technical support, including AP7315D-15W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-15W5-7 requirements.

6.How does Aetrix verify that AP7315D-15W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7315D-15W5-7 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-15W5-7 meets industry standards.

7.What is the process for return or replacement of AP7315D-15W5-7?

All AP7315D-15W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-15W5-7, 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-15W5-7 part is unused and in its original packaging.

Return procedure for AP7315D-15W5-7:

1.Submit a request within 90 days.

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

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