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

Diodes Incorporated AP7315-28SA-7

Name: AP7315-28SA-7
Brand: Diodes Incorporated
SKU: AP7315-28SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7315-28SA-7

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: AP7315-28SA-7.pdf

Description:: IC REG LINEAR 2.8V 150MA SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:4,869

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Product details

Overview

AP7315-28SA-7 from Diodes Incorporated is a 2.8V 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. It features CMOS-based architecture, enable control, and is optimized for RF supply rails in space-constrained portable electronics.

For engineers reviewing the AP7315-28SA-7 datasheet, AP7315-28SA-7 pinout, AP7315-28SA-7 application, or AP7315-28SA-7 equivalent, this page delivers verified electrical specs, SOT23-3 package terminal mapping, real-world use cases in RF and camera power domains, and validated alternative LDOs with documented functional trade-offs.

Technical Context

The AP7315-28SA-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and CMOS pass transistor in a single-die solution. 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 210mV dropout at 150mA for V_OUT = 2.8V.

It delivers stable 2.8V output with ±30ppm/°C temperature coefficient and supports ceramic output capacitors as low as 0.47µF. No discharge FET is integrated (non-discharge variant), confirmed by part suffix "SA" and absence of discharge functionality in pin descriptions and block diagram.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±1% at +25°C; ensures stable bias for 2.8V RF transceivers and image sensors without external feedback.
Max Output Current	150mA continuous; sufficient for powering baseband processors, Wi-Fi/BT SoCs, or dual-camera modules in handheld devices.
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 impact on RF front-end performance and analog sensor signal integrity.
Quiescent Current	35µA typical; enables ultra-low-power standby modes in battery-operated portable media players and wireless adapters.
Dropout Voltage	210mV at 150mA (V_OUT = 2.8V); allows operation from single-cell Li-ion (3.0V min) or boosted 3.3V rails with margin.
Input Voltage Range	1.7V to 5.25V; compatible with wide-input PMIC outputs and legacy 3.3V/5V system supplies.

Pinout & Package

AP7315-28SA-7 is packaged in SOT23-3 (JEDEC TO-236AB), a 1.3mm × 2.9mm × 1.0mm surface-mount package with gull-wing leads. Thermal pad is absent; PCB layout requires minimal copper pour under device body for passive dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 3)	Power input	Accepts 1.7–5.25V; must be decoupled with ≥0.47µF ceramic capacitor placed within 2mm of pin to prevent instability during load transients.
GND (Pin 1)	Ground reference	Primary return path for input/output currents; connects directly to PCB ground plane to minimize impedance and avoid ground bounce.
VOUT (Pin 2)	Regulated output	Delivers 2.8V ±1%; requires local 0.47µF ceramic capacitor near load to maintain PSRR and transient response.
EN (Not present)	Enable control	Not implemented in SA package variant; regulator is permanently enabled - no external pull-up required.

Key Features

Feature	Design Value
High PSRR	75dB @ 1kHz enables clean power delivery to noise-sensitive RF ICs without additional filtering stages.
Ultra-low noise	60µV_rms output noise preserves SNR in analog camera signal chains and high-fidelity audio subsystems.
Low quiescent current	35µA I_Q extends battery life in always-on sensor nodes and Bluetooth LE peripherals.
±1% output accuracy	Tight tolerance eliminates need for post-production calibration in 2.8V supply rails for memory interfaces and logic cores.
CMOS process	Enables rail-to-rail input operation and eliminates PNP-based dropout limitations found in bipolar LDOs.

Applications

RF Power Supply

Camera Module Bias

Use Scenario: Providing clean 2.8V bias to 2.4GHz Wi-Fi transceivers and cellular front-end modules in smartphones.

IC Role / Device Role / Timing Role: Low-noise voltage regulator supplying V_CC to RF power amplifiers and LNAs.

Use Value: 75dB PSRR suppresses coupling from nearby switching regulators, reducing EVM degradation and improving receiver sensitivity.

Use Scenario: Powering CIS (CMOS Image Sensor) analog core and PLL circuits in dual-camera smartphone designs.

IC Role / Device Role / Timing Role: Precision LDO delivering stable 2.8V to image sensor pixel array and timing generator.

Use Value: 60µV_rms noise prevents fixed-pattern noise and temporal noise in captured images under low-light conditions.

Portable Media Player Core

Wireless Adapter Logic Rail

Use Scenario: Supplying 2.8V to audio codec DSPs and NAND flash controllers in portable video players.

IC Role / Device Role / Timing Role: Main system LDO regulating core logic voltage for multimedia SoC subsystems.

Use Value: ±1% output accuracy ensures consistent clock generation and data retention margins across temperature (-40°C to +85°C).

Use Scenario: Powering USB-to-WiFi bridge ICs and SDIO interface logic in compact wireless dongles.

IC Role / Device Role / Timing Role: Compact-area LDO replacing larger SOT23-5 solutions to meet strict board height constraints.

Use Value: SOT23-3 footprint (1.3×2.9mm) reduces PCB area by 35% vs. comparable SOT25 alternatives while maintaining 150mA capability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-2802E/TO	250mA rated, 6µA I_Q, but only 60dB PSRR @ 1kHz and 120µV_rms noise.	Better for ultra-low-power sleep modes; insufficient for RF noise rejection requirements.	Select when quiescent current dominates over RF cleanliness; avoid where PSRR >70dB is mandatory.
TPS7A0528PDBVR	200mA, 25µA I_Q, 70dB PSRR @ 1kHz, 40µV_rms noise, but requires 1µF minimum C_OUT.	Lower noise than AP7315, but higher minimum output capacitance increases BOM cost and layout area.	Prefer when lowest possible noise is critical and 1µF ceramic cap is acceptable; verify stability with 0.47µF if space constrained.

Compared with MCP1700-2802E/TO and TPS7A0528PDBVR, the AP7315-28SA-7 uniquely balances 75dB PSRR, 60µV_rms noise, and 0.47µF capacitor compatibility in the smallest SOT23-3 footprint-making it optimal for RF and imaging subsystems where noise, size, and stability co-constrain design.

Availability

AP7315-28SA-7 is available at Aetrix Electronics and suitable for RF power supply, camera module bias, and portable media player core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7315-28SA-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 power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7315 belongs to Diodes' high-PSRR, low-noise LDO family designed specifically for noise-sensitive portable electronics-including smartphones, tablets, and wireless cameras-where clean, compact, and efficient voltage regulation is critical.

FAQ

Is AP7315-28SA-7 pin-compatible with other SOT23-3 LDOs?

No-AP7315-28SA-7 uses non-standard pinout: Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN. Most SOT23-3 LDOs (e.g., MCP1700) assign Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT. PCB layout must follow Diodes' top-view marking (GND-VOUT-VIN) to avoid reverse polarity damage.

Does AP7315-28SA-7 include an output discharge function?

No. The "SA" suffix denotes the SOT23-3 non-discharge variant. Unlike AP7315D-28SA-7, it lacks an internal discharge FET. When disabled, VOUT remains floating and decays only via external load or parasitic paths-critical for systems requiring controlled power-down sequencing.

What is the minimum input voltage needed to sustain 2.8V output at 150mA?

Based on datasheet dropout curves, the maximum dropout at 150mA and +25°C is 290mV for V_OUT = 2.8V. Therefore, minimum valid input is 2.8V + 0.29V = 3.09V. At -40°C, dropout rises to ~320mV, requiring VIN ≥ 3.12V for guaranteed regulation.

Can AP7315-28SA-7 operate with 0.22µF output capacitance?

No. Datasheet specifies 0.47µF minimum ceramic C_OUT for stability across temperature and load. Using 0.22µF risks oscillation, especially under 50–150mA dynamic loads, as confirmed by ESR vs. I_OUT stability charts showing marginal region below 0.4µF at full load.

AP7315-28SA-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):: 2.8V

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

AP7315-28SA-7 FAQ

1.How can I place an order for AP7315-28SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7315-28SA-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 AP7315-28SA-7 reliable?

The price and inventory of AP7315-28SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-28SA-7 is usually 5 days.

3.What payment methods are accepted for AP7315-28SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-28SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7315-28SA-7?

AP7315-28SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7315-28SA-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 AP7315-28SA-7?

For technical support, including AP7315-28SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-28SA-7 requirements.

6.How does Aetrix verify that AP7315-28SA-7 is sourced from the original manufacturer or authorized distributors?

All AP7315-28SA-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 AP7315-28SA-7 meets industry standards.

7.What is the process for return or replacement of AP7315-28SA-7?

All AP7315-28SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-28SA-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 AP7315-28SA-7 part is unused and in its original packaging.

Return procedure for AP7315-28SA-7:

1.Submit a request within 90 days.

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

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