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

Diodes Incorporated AP7315D-295FS4-7B

Name: AP7315D-295FS4-7B
Brand: Diodes Incorporated
SKU: AP7315D-295FS4-7B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315D-295FS4-7B

Manufacturer:: Diodes Incorporated

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

Package:: 4-XDFN Exposed Pad

Datasheet:: AP7315D-295FS4-7B.pdf

Description:: IC REG LINEAR 2.95V 150MA 4DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7315D-295FS4-7B from Diodes Incorporated is a 2.95V 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 features CMOS-based architecture, 35µA quiescent current, and integrated auto-discharge functionality - designed for RF supply rails in compact portable devices.

For engineers reviewing the AP7315D-295FS4-7B datasheet, AP7315D-295FS4-7B pinout, AP7315D-295FS4-7B application, or AP7315D-295FS4-7B equivalent, key selection criteria include dropout voltage (210mV @ 150mA), thermal performance in X2-DFN1010-4 package, EN logic thresholds (0.5V_IL/1.3V_IH), and discharge path resistance (30Ω typical).

Technical Context

The AP7315D-295FS4-7B implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, current-limit circuitry, and active discharge FET. Its enable input controls both regulation and output discharge, eliminating residual voltage on shutdown.

It operates across 1.7V–5.25V input range, delivers stable 2.95V output up to 150mA, and maintains ±1% accuracy over -40°C to +85°C ambient. The built-in discharge path (30Ω typical) ensures rapid VOUT decay when EN is pulled low, critical for power sequencing in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.95V ±1% - ensures precise biasing for 3.0V-tolerant RF ICs and sensors without external feedback.
Max Output Current	150mA - supports moderate-power analog blocks (e.g., RF transceivers, camera ISPs) without thermal derating in X2-DFN1010-4.
Dropout Voltage	210mV @ 150mA - enables operation from 3.16V input (e.g., single-cell Li-ion post-LDO), minimizing headroom loss.
PSRR	75dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz) - preserves signal integrity in sensitive analog front-ends (e.g., ADC references, PLL VCO supplies).
Quiescent Current	35µA typical - extends battery life in always-on subsystems (e.g., Bluetooth LE receivers, sensor hubs).
Enable Thresholds	V_IL ≤ 0.5V, V_IH ≥ 1.3V - compatible with 1.8V/3.3V GPIOs without level-shifting.
Discharge Resistance	30Ω typical - discharges 10µF load to <100mV in <300µs, satisfying fast power-down requirements.

Pinout & Package

AP7315D-295FS4-7B uses the X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch) package with wettable flank leads for automated optical inspection. Thermal pad must be connected to PCB ground plane for optimal thermal dissipation (θ_JA ≈ 220°C/W on JEDEC High-K board).

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 4)	Input power supply	Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling capacitor placed adjacent to pin.
GND (Pin 2)	Ground reference	Primary return path for load current and regulator core; connects to thermal pad for heat sinking.
EN (Pin 3)	Enable control input	Active-high logic: drives high (>1.3V) to enable, low (<0.5V) to disable + activate discharge FET.
VOUT (Pin 1)	Regulated output	Delivers 2.95V ±1%; requires 0.47µF ceramic output capacitor close to pin for stability.
Thermal Pad	Thermal & mechanical anchor	Not electrically functional; must be soldered to large GND copper area for thermal management.

Key Features

Feature	Design Value
Auto-discharge function	30Ω internal NMOS discharge path ensures rapid VOUT collapse during shutdown - eliminates need for external bleed resistor.
Ultra-low noise output	60µV_rms (10Hz–100kHz) enables clean power for RF synthesizers and high-resolution ADCs without additional filtering.
High PSRR at low frequency	75dB @ 1kHz rejects ripple from buck converter switching frequencies and their harmonics near baseband.
Low quiescent current	35µA typical allows >1-year battery life in coin-cell-powered IoT sensors operating in deep-sleep mode.
Wide input voltage range	1.7–5.25V supports direct connection to single Li-ion (3.0–4.2V), USB (4.75–5.25V), or regulated 3.3V/2.5V rails.
±1% output accuracy	Guaranteed over temperature (-40°C to +85°C) and line/load conditions - reduces margining overhead in precision analog designs.

Applications

RF Power Amplifier Bias

Camera Image Signal Processor (ISP)

Use Scenario: Providing stable 2.95V bias to GaAs pHEMT power amplifiers in 4G/5G mobile front-ends.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering clean V_{CC_PA} independent of noisy system DC/DC outputs.

Use Value: 60µV_rms noise prevents AM-to-PM distortion; 75dB PSRR suppresses 2.1GHz PA supply modulation sidebands.

Use Scenario: Powering the analog core of image signal processors in smartphone camera modules.

IC Role / Device Role / Timing Role: Fixed 2.95V LDO supplying ISP analog rail with fast transient response to burst-mode pixel readout.

Use Value: 210mV dropout enables use with aging Li-ion cells; 35µA I_Q minimizes standby power in always-on vision wake-up circuits.

Wireless Audio Codec Supply

Low-Power MCU Core Rail

Use Scenario: Delivering ultra-low-noise 2.95V to stereo audio codecs in true wireless earbuds.

IC Role / Device Role / Timing Role: Regulator for DAC/ADC analog sections where supply noise directly impacts THD+N performance.

Use Value: 60µV_rms noise meets <−100dB THD+N targets; auto-discharge prevents pop/click during Bluetooth link reconnection.

Use Scenario: Supplying 2.95V core voltage to ARM Cortex-M0+ microcontrollers in battery-powered edge nodes.

IC Role / Device Role / Timing Role: Primary LDO for MCU V_CORE, enabled synchronously with system wake-up interrupt.

Use Value: 35µA I_Q extends sleep-mode battery life; 150mA rating supports peak BLE transmission currents without droop.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700T-3002E/MB	3.0V output, 250mA rating, no enable or discharge; 17µA I_Q, 65dB PSRR @ 1kHz	Lacks EN control and discharge - requires external pull-up and bleed resistor for sequencing.	Select when lowest I_Q is critical and discharge not required; verify 3.0V vs. 2.95V tolerance in target ICs.
Torex XC6210B295MR-G	2.95V output, 150mA, EN pin, no discharge; 25µA I_Q, 70dB PSRR @ 1kHz, 40µV_rms noise	No auto-discharge - slower VOUT decay risks latch-up in cascaded power domains.	Choose for lower noise (40µV_rms) and I_Q where discharge is managed externally or unnecessary.

Compared with MCP1700T-3002E/MB and XC6210B295MR-G, AP7315D-295FS4-7B uniquely integrates discharge functionality while maintaining competitive noise (60µV_rms) and PSRR (75dB), making it optimal for space-constrained, multi-rail portable systems requiring clean, sequenced power-down.

Availability

AP7315D-295FS4-7B is available at Aetrix Electronics and suitable for RF power amplifier bias, camera ISP supplies, wireless audio codec rails, and low-power MCU core voltage regulation requiring stable component supply across high-mix production runs.

Supply support for AP7315D-295FS4-7B 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7315 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive, battery-powered portable electronics where small footprint, low I_Q, and fast transient response are mandatory.

FAQ

What is the purpose of the thermal pad on the X2-DFN1010-4 package?

The thermal pad on AP7315D-295FS4-7B is a non-electrical mechanical and thermal interface. It must be soldered to a large PCB copper area connected to GND to dissipate heat effectively. Leaving it unconnected degrades θ_JA by >100°C/W and risks thermal shutdown under 150mA load.

Does the AP7315D-295FS4-7B require an external discharge resistor?

No. The "D" suffix denotes integrated auto-discharge functionality. When EN is pulled low, an internal 30Ω NMOS FET actively discharges VOUT to GND, eliminating the need for external components and reducing BOM count and PCB area.

Can AP7315D-295FS4-7B operate with a 1.8V input supply?

No. The minimum input voltage is 1.7V, but dropout voltage at 150mA is 210mV for 2.95V output - requiring ≥3.16V input to maintain regulation. At 1.8V input, the device enters dropout and cannot sustain 2.95V output.

How does the EN pin behave during power-up sequences?

The EN pin has no internal pull-up/down. If left floating during power-up, the regulator may power on unpredictably. For reliable startup, tie EN to VIN via a 100kΩ resistor or drive it actively from a GPIO after V_IN stabilizes to >1.7V.

AP7315D-295FS4-7B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-XDFN Exposed Pad

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):: 2.95V

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:: -

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X2-DFN1010-4

AP7315D-295FS4-7B FAQ

1.How can I place an order for AP7315D-295FS4-7B through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315D-295FS4-7B 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-295FS4-7B reliable?

The price and inventory of AP7315D-295FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-295FS4-7B is usually 5 days.

3.What payment methods are accepted for AP7315D-295FS4-7B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-295FS4-7B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315D-295FS4-7B?

AP7315D-295FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315D-295FS4-7B 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-295FS4-7B?

For technical support, including AP7315D-295FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-295FS4-7B requirements.

6.How does Aetrix verify that AP7315D-295FS4-7B is sourced from the original manufacturer or authorized distributors?

All AP7315D-295FS4-7B 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-295FS4-7B meets industry standards.

7.What is the process for return or replacement of AP7315D-295FS4-7B?

All AP7315D-295FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-295FS4-7B, 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-295FS4-7B part is unused and in its original packaging.

Return procedure for AP7315D-295FS4-7B:

1.Submit a request within 90 days.

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

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