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

Diodes Incorporated AP7315-285SA-7

Name: AP7315-285SA-7
Brand: Diodes Incorporated
SKU: AP7315-285SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-285SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-285SA-7.pdf

Description:: IC REG LINEAR 2.85V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:1,461

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Product details

Overview

AP7315-285SA-7 from Diodes Incorporated is a 2.85V fixed-output, 150mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in compact portable electronics.

For engineers reviewing the AP7315-285SA-7 datasheet, AP7315-285SA-7 pinout, AP7315-285SA-7 application, or AP7315-285SA-7 equivalent, this page delivers verified electrical specs, SOT23-3 package terminal mapping, real-world use cases in RF power management, and validated alternative LDOs with documented functional trade-offs.

Technical Context

The AP7315-285SA-7 employs a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input (EN) provides precise on/off control with 0.5V max logic-low threshold and 1.3V min logic-high threshold, supporting system-level power sequencing.

It operates across 1.7V–5.25V input range and maintains regulation down to 210mV dropout at 150mA (for V_OUT = 2.85V), while delivering stable output under load transients up to 150mA with minimal overshoot - critical for noise-sensitive RF IC biasing.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.85V ±1% - ensures stable bias for 2.8V–3.0V RF front-end ICs without external feedback network.
Max Output Current	150mA continuous - sufficient for powering single-band RF transceivers or low-power PMIC sub-rails.
PSRR	75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails.
Output Noise	60µV_rms (10Hz–100kHz) - minimizes phase noise degradation in VCOs and LNAs.
Quiescent Current	35µA typical - enables always-on operation in battery-powered standby modes without significant drain.
Dropout Voltage	210mV at 150mA - allows operation from single-cell Li-ion (3.0V min) or regulated 3.3V rails with margin.
Input Voltage Range	1.7V to 5.25V - compatible with wide-range battery inputs and post-regulated system supplies.

Pinout & Package

AP7315-285SA-7 is housed in a RoHS-compliant SOT23-3 (SA) package - a 2.9mm × 1.6mm × 1.1mm surface-mount outline with gull-wing leads, optimized for high-density PCB layouts in space-constrained handheld devices.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 1)	Power input	Accepts 1.7–5.25V supply; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress input ripple and transient droop.
GND (Pin 2)	Ground reference	Primary return path for load current and internal bias; must connect to low-impedance ground plane to maintain PSRR and thermal stability.
VOUT (Pin 3)	Regulated output	Delivers stable 2.85V ±1%; output capacitor (≥0.47µF ceramic) must be placed within 2mm of this pin and GND for transient response and loop stability.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz - rejects noise from shared system rails, preserving signal integrity in RF signal chains.
Ultra-low noise	60µV_rms (10Hz–100kHz) - avoids modulation of sensitive analog RF blocks like mixers and synthesizers.
Low quiescent current	35µA typical - extends battery life in always-on wireless peripherals without sacrificing startup speed.
Fast enable response	EN pin toggles output within <10µs - supports dynamic power gating in multi-mode communication ICs.
Thermal protection	Internal fold-back current limit and thermal shutdown - prevents damage during sustained overload or poor PCB heat sinking.

Applications

RF Power Amplifier Bias

Wi-Fi/Bluetooth Transceiver Core Supply

Use Scenario: Providing clean, stable 2.85V bias to GaAs pHEMT power amplifiers in 2.4GHz/5GHz Wi-Fi modules.

IC Role / Device Role / Timing Role: Low-noise LDO supplying constant-voltage bias rail; no timing function - purely analog power conditioning.

Use Value: 60µV_rms noise and 75dB PSRR prevent AM-to-PM distortion and EVM degradation in high-order QAM transmissions.

Use Scenario: Delivering regulated 2.85V core voltage to dual-band Wi-Fi/BT SoCs during active transmit/receive cycles.

IC Role / Device Role / Timing Role: Primary local regulator for digital RF baseband and analog front-end subsystems; enables independent power domain control.

Use Value: 150mA capacity and 210mV dropout support full-rate packet transmission from single-cell Li-ion (3.0V min) without brownout.

Camera Module ISP Core Rail

Portable Audio Codec Analog Supply

Use Scenario: Powering image signal processor (ISP) cores in smartphone camera modules requiring low-noise, tightly regulated voltage.

IC Role / Device Role / Timing Role: Dedicated LDO for ISP digital logic and analog sensor interface blocks; decouples from noisy system PMIC outputs.

Use Value: ±1% output accuracy ensures consistent ADC reference scaling and color processing fidelity across temperature (-40°C to +85°C).

Use Scenario: Supplying 2.85V analog AVDD to stereo audio codecs in Bluetooth headsets and portable speakers.

IC Role / Device Role / Timing Role: Clean analog rail generator; isolates codec DAC/ADC stages from digital switching noise on main SoC supply.

Use Value: 35µA quiescent current enables low-power audio playback mode while maintaining THD+N < -95dB performance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2802E/TO	2.8V output (0.1V lower), 250mA I_OUT, 6µA I_Q, but only 60dB PSRR @ 1kHz and 120µV_rms noise.	Lower noise sensitivity tolerance; suitable for non-RF digital rails where 2.8V suffices and PSRR >70dB is not required.	Select when ultra-low I_Q dominates over RF-grade noise rejection and exact 2.85V matching is unnecessary.
Torex XC6206P282MR-G	2.8V output, 150mA, 15µA I_Q, 70dB PSRR @ 1kHz, 80µV_rms noise, SOT23-3 package.	Higher output noise and lower PSRR reduce suitability for VCO/LNA bias; better for general-purpose analog rails.	Choose for cost-sensitive designs needing minimal I_Q and moderate noise performance - not for RF-critical nodes.

Compared with MCP1700-2802E/TO and XC6206P282MR-G, the AP7315-285SA-7 uniquely delivers 2.85V precision, 75dB PSRR, and 60µV_rms noise in the same SOT23-3 footprint - making it the only option qualified for noise-limited RF bias applications demanding exact voltage alignment and superior ripple rejection.

Availability

AP7315-285SA-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, Wi-Fi transceiver core supply, camera ISP core rails, and portable audio codec analog supply requiring stable component supply across production lifecycles.

Supply support for AP7315-285SA-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.

The AP7315 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive portable RF applications where output accuracy, PSRR, and ultra-low noise are mandatory - not general-purpose regulation.

FAQ

What is the minimum input voltage required for AP7315-285SA-7 to maintain regulation at full 150mA load?

The AP7315-285SA-7 requires VIN ≥ 3.06V (2.85V + 210mV dropout) to sustain 2.85V output at 150mA across temperature. At room temperature, dropout is typically 210mV; worst-case is 290mV per datasheet Table 4, so 3.14V ensures margin. Below 3.06V, output voltage drops linearly with input.

Can the EN pin be left unconnected, or does it require a pull-up resistor?

The EN pin must never float - it must be actively driven high (≥1.3V) to enable or low (≤0.5V) to disable. If unused, tie EN directly to VIN via a short trace; do not use a pull-up resistor, as leakage current could cause unintended partial enable states or slow turn-on due to RC delay.

Is AP7315-285SA-7 qualified for automotive applications?

No - AP7315-285SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7315Q series) with PPAP support, IATF 16949 manufacturing, and extended temperature screening. This SA-suffix part is rated for -40°C to +85°C industrial operation only.

What is the recommended output capacitor value and type for optimal transient response?

Use a 0.47µF X5R/X7R ceramic capacitor with ≤100mΩ ESR, placed within 2mm of VOUT and GND pins. For loads with >50mA step changes, add a 4.7µF–10µF bulk tantalum or polymer capacitor in parallel to maintain voltage droop <2% during transients.

AP7315-285SA-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):: 2.85V

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:: SOT-23-3

AP7315-285SA-7 FAQ

1.How can I place an order for AP7315-285SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-285SA-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 AP7315-285SA-7 reliable?

The price and inventory of AP7315-285SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-285SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-285SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-285SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-285SA-7?

AP7315-285SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-285SA-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 AP7315-285SA-7?

For technical support, including AP7315-285SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-285SA-7 requirements.

6.How does Aetrix verify that AP7315-285SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-285SA-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 AP7315-285SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-285SA-7?

All AP7315-285SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-285SA-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 AP7315-285SA-7 part is unused and in its original packaging.

Return procedure for AP7315-285SA-7:

1.Submit a request within 90 days.

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

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