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

Diodes Incorporated AP7315-185W5-7

Name: AP7315-185W5-7
Brand: Diodes Incorporated
SKU: AP7315-185W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-185W5-7

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: AP7315-185W5-7.pdf

Description:: IC REG LINEAR 1.85V 150MA SOT25

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315-185W5-7 from Diodes Incorporated is a 150mA low-dropout linear regulator with fixed 1.85V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, CMOS-based architecture, and is optimized for RF supply and portable media applications requiring stable low-noise biasing.

For engineers reviewing the AP7315-185W5-7 datasheet, AP7315-185W5-7 pinout, AP7315-185W5-7 application, or AP7315-185W5-7 equivalent, this page delivers verified specifications, SOT25 package layout details, real-world use cases in wireless communication subsystems, and validated alternative LDOs for voltage rail optimization.

Technical Context

The AP7315-185W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor in a single die. Its enable input (EN) provides precise on/off control with defined logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.3V), and it operates across 1.7V–5.25V input range while maintaining regulation down to 150mA load.

It delivers 1.85V output with dropout as low as 280mV at 150mA (typical), supports 0.47µF ceramic input/output capacitors, and includes short-circuit protection clamping output current to ~55mA during V_OUT-to-GND fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.85V ±1% - ensures stable bias for RF transceivers and camera sensor analog blocks without external feedback.
Max Output Current	150mA - sufficient for powering baseband ICs, low-power microcontrollers, or sensor signal chains in handheld devices.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters, critical for clean RF supply rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise impact in oscillator circuits and ADC reference paths.
Quiescent Current	35µA (typ.) - enables multi-day battery life in always-on sensor nodes and standby modes of portable electronics.
Dropout Voltage	280mV at 150mA - allows operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (2.4V min) with margin.
Input Voltage Range	1.7V to 5.25V - compatible with wide-range power sources including USB, PMIC outputs, and buck converter secondaries.

Pinout & Package

SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed thermal pad (not electrically connected). Requires PCB copper area under thermal pad tied to GND for optimal thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1 – VIN	Power input	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 load current and internal circuitry; connects directly to system ground plane.
3 – EN	Enable control	Active-high logic input; drives regulator ON when ≥1.3V, OFF when ≤0.5V; must not float.
4 – NC	No connect	Internally unconnected; recommended to tie to GND for improved thermal dissipation and EMI shielding.
5 – VOUT	Regulated output	Delivers 1.85V ±1%; requires local 0.47µF ceramic capacitor to maintain stability and transient response.

Key Features

Feature	Design Value
High PSRR	75dB at 1kHz - rejects ripple from noisy switchers feeding shared input rails in compact PCB layouts.
Ultra-low noise	60µV_rms - preserves SNR in audio codecs, RF front-end biasing, and high-resolution sensor interfaces.
Low quiescent current	35µA typical - extends battery runtime in always-on wearable and IoT edge nodes.
Fast enable response	EN-to-VOUT rise time <100µs - supports dynamic power sequencing in multi-rail systems.
Short-circuit protection	~55mA foldback limit - prevents thermal runaway and enables safe operation in fault-prone portable environments.

Applications

RF Power Amplifier Bias

Camera Image Sensor Core Supply

Use Scenario: Providing clean, low-noise bias to GaAs pHEMT or SiGe HBT RF power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.85V to PA drain supply, rejecting switching noise from PMIC buck converters.

Use Value: 75dB PSRR and 60µV_rms noise prevent AM-to-PM distortion and EVM degradation in transmit paths.

Use Scenario: Powering analog core circuitry (ADC, PLL, pixel array bias) in smartphone CMOS image sensors.

IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying 1.85V to sensor analog block, synchronized with frame timing signals.

Use Value: 35µA quiescent current and 280mV dropout extend battery life while supporting rapid wake-up from deep sleep modes.

Wireless Adapter Baseband IC

Portable Media Player Audio Codec

Use Scenario: Regulating supply for Bluetooth/Wi-Fi SoC baseband processors in USB dongles and embedded modules.

IC Role / Device Role / Timing Role: Enable-controlled LDO providing 1.85V to digital baseband core, sequenced with host USB enumeration.

Use Value: EN pin allows host MCU to power-cycle baseband IC independently, reducing system-level standby leakage.

Use Scenario: Delivering ultra-low-noise 1.85V to stereo audio DAC/ADC and headphone amplifier in MP3 players.

IC Role / Device Role / Timing Role: Precision LDO replacing bulkier solutions to minimize PCB area while meeting THD+N < -95dB specs.

Use Value: ±1% output accuracy and 60µV_rms noise ensure consistent audio fidelity across battery discharge cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-1802E/TT	100mA max output, 6µA IQ, 1.8V fixed output, SOT23-3 package	Limited to lower-current loads; no enable pin; smaller footprint but no NC pin for thermal enhancement	Select when ultra-low IQ dominates over output current capability and enable control is unnecessary.
Torex XC6210B182MR-G	200mA max output, 1.8V fixed, 15µA IQ, SOT25 package, built-in CL discharge	Includes active output discharge (vs. AP7315 non-discharge variant); slightly lower noise (45µVrms)	Prefer when fast VOUT discharge during shutdown is required to prevent back-powering of downstream logic.

Compared with MCP1700T-1802E/TT, AP7315-185W5-7 offers +50mA output headroom and enable control; versus XC6210B182MR-G, it trades discharge functionality for tighter output accuracy (±1% vs. ±2%) and higher PSRR (75dB vs. 65dB @1kHz).

Availability

AP7315-185W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, camera image sensor core supply, and portable media player audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7315-185W5-7 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, designed specifically for noise-sensitive portable electronics where clean, efficient, and space-constrained voltage regulation is essential.

FAQ

What is the maximum allowable input voltage for AP7315-185W5-7?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may trigger internal protection or degrade long-term reliability. Operation at 5.25V is valid only when ambient temperature remains within –40°C to +85°C and thermal design meets JEDEC High-K board requirements.

Does AP7315-185W5-7 include output discharge functionality?

No - AP7315-185W5-7 is the non-discharge variant. It lacks an internal pull-down transistor on VOUT; when disabled via EN, the output floats and discharges only through external load or parasitic paths. For active discharge, select AP7315D-185W5-7, which adds a 30Ω NMOS between VOUT and GND when EN = low.

Can AP7315-185W5-7 operate with ceramic capacitors smaller than 0.47µF?

No - the datasheet specifies minimum 0.47µF ceramic input and output capacitance for guaranteed stability and transient response. Using smaller values risks oscillation or excessive overshoot during load steps, especially above 50mA. ESR must remain below 100mΩ across 10Hz–2MHz per stability graphs in DS38352 Rev. 2–2.

How does the NC pin (Pin 4) affect thermal performance in SOT25?

Pin 4 is internally unconnected but thermally coupled to the die. Tying it to GND increases copper area under the package, improving heat conduction to the PCB ground plane. This reduces junction-to-ambient thermal resistance by up to 15°C/W compared to leaving it floating, enabling sustained 150mA operation at +85°C ambient.

AP7315-185W5-7 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):: 1.85V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.44V @ 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

AP7315-185W5-7 FAQ

1.How can I place an order for AP7315-185W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-185W5-7 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 AP7315-185W5-7 reliable?

The price and inventory of AP7315-185W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-185W5-7 is usually 5 days.

3.What payment methods are accepted for AP7315-185W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-185W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-185W5-7?

AP7315-185W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-185W5-7 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 AP7315-185W5-7?

For technical support, including AP7315-185W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-185W5-7 requirements.

6.How does Aetrix verify that AP7315-185W5-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-185W5-7 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 AP7315-185W5-7 meets industry standards.

7.What is the process for return or replacement of AP7315-185W5-7?

All AP7315-185W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-185W5-7, 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 AP7315-185W5-7 part is unused and in its original packaging.

Return procedure for AP7315-185W5-7:

1.Submit a request within 90 days.

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

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