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

Diodes Incorporated AP2115R5A-3.3TRG1

Name: AP2115R5A-3.3TRG1
Brand: Diodes Incorporated
SKU: AP2115R5A-3.3TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2115R5A-3.3TRG1

Manufacturer:: Diodes Incorporated

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

Package:: SOT-89-5/6

Datasheet:: AP2115R5A-3.3TRG1.pdf

Description:: IC REG LINEAR 3.3V 1A SOT89-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP2115R5A-3.3TRG1 from BCD Semiconductor is a 3.3V fixed-output, 1A CMOS low-dropout linear regulator in SOT-89-5 package with enable control, ±1.5% output accuracy, 450mV typical dropout at 1A, and 30µV_RMS output noise-designed for stable power delivery in LCD monitor and STB mainboard applications.

For engineers reviewing the AP2115R5A-3.3TRG1 datasheet, AP2115R5A-3.3TRG1 pinout, AP2115R5A-3.3TRG1 application, or AP2115R5A-3.3TRG1 equivalent, key selection criteria include guaranteed 1A load capability under 4.3–6.0V input, thermal shutdown (160°C), fold-back short-circuit protection (50mA), and compatibility with ceramic/tantalum/aluminum electrolytic output capacitors ≥4.7µF.

Technical Context

The AP2115R5A-3.3TRG1 implements a CMOS-based LDO architecture with internal PMOS pass transistor, enabling low quiescent current (65–90µA) and high PSRR (65dB @ 1kHz). Its enable logic (VIH ≥1.5V, VIL ≤0.4V) supports system-level power sequencing and standby mode with 0.01–1.0µA shutdown current.

It features integrated over-temperature shutdown (160°C trip, 25°C hysteresis), output discharge resistor (60Ω when EN=low), and EN pull-down resistor (3.0MΩ), ensuring safe startup, controlled turn-off, and robust fault handling without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±1.5% - ensures stable core/supply rail for 3.3V logic and interface ICs without external feedback.
Max Output Current	1A continuous - supports single-rail powering of SoC subsystems, display drivers, or memory interfaces.
Dropout Voltage	450mV typ. @ I_OUT=1A - enables operation from 4.3V input (e.g., 5V rail minus diode drop) while maintaining regulation.
Output Noise	30µV_RMS (10Hz–100kHz) - minimizes voltage ripple on noise-sensitive analog/RF sections powered from this rail.
PSRR	65dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input.
Quiescent Current	65–90µA @ VIN=4.3V - maintains ultra-low static power in always-on system blocks like remote control receivers.
Thermal Shutdown	160°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design.

Pinout & Package

SOT-89-5 package: 5-pin surface-mount device with exposed thermal pad (pin 2 connected to GND internally); footprint optimized for thermal dissipation in space-constrained consumer electronics.

Pin/Terminal	Circuit Role	Design Meaning
1	V_OUT	Regulated 3.3V output - connects directly to load; requires ≥4.7µF capacitor (ceramic/tantalum/Al-elec) for stability.
2	GND	Power ground reference - must be low-impedance connection to PCB ground plane; ties to thermal pad.
3	NC / EN	No-connect or enable input - in R5A variant, pin 3 is EN (active-high); tie to VIN or MCU GPIO for on/off control.
4	V_IN	Input supply (4.3–6.0V) - requires local 4.7µF ceramic decoupling capacitor placed near pin.
5	EN / NC	Enable input (active-high) - drives internal regulator; logic high (≥1.5V) enables output, low (≤0.4V) disables with 60Ω discharge path.

Key Features

Feature	Design Value
Stable with flexible output capacitance	Works with 4.7µF ceramic, tantalum, or aluminum electrolytic - eliminates need for specific capacitor chemistry.
Fold-back short-circuit protection	Limits output current to 50mA during hard short - prevents thermal runaway and enables safe auto-recovery.
Low-noise regulation	30µV_RMS output noise - avoids interference in audio codecs, ADC references, or RF front-end bias rails.
Fast start-up time	20µs typical - meets timing requirements for power-sequenced systems where LDO activation must align with clock/domain enable.
Robust ESD immunity	4000V HBM / 400V MM - withstands handling and board assembly stress without latch-up or parametric shift.

Applications

LCD Monitor Power Rail

Set-Top Box Mainboard

Use Scenario: Supplies 3.3V to HDMI receiver ICs, microcontroller peripherals, and panel timing controllers.

IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 3.3V from 5V or 12V DC/DC converter output.

Use Value: 65dB PSRR at 1kHz rejects switching noise from upstream buck converter, preserving signal integrity in video data paths.

Use Scenario: Powers USB PHY, Ethernet MAC, and flash memory interface on STB mainboard.

IC Role / Device Role / Timing Role: Load-switched 3.3V rail controlled by SoC GPIO to manage subsystem power domains.

Use Value: 20µs start-up time and 60Ω V_OUT discharge enable fast, glitch-free hot-plug detection and reset sequencing.

Industrial Display Controller

Digital Signage Media Processor

Use Scenario: Provides regulated 3.3V to FPGA configuration circuitry and LVDS transmitter in wide-temp displays.

IC Role / Device Role / Timing Role: Temperature-stable LDO operating across –40°C to +85°C ambient range.

Use Value: ±30ppm/°C output voltage drift ensures consistent logic margin and interface timing margins over full industrial temperature range.

Use Scenario: Delivers 3.3V to DDR3 memory termination and PCIe endpoint logic in signage media players.

IC Role / Device Role / Timing Role: High-current (1A) LDO with low dropout enabling use of 5V intermediate bus in compact form factor.

Use Value: 450mV dropout at 1A allows reliable operation even as input decays to 3.75V, extending hold-up time during brown-out events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2112K-3.3TRG1	SOIC-8 package, 600mA max output, lower thermal resistance (74.6°C/W vs. 47°C/W)	Better suited for lower-power, board-space-flexible designs with higher PCB copper area for heat spreading	Select when board layout allows SOIC-8 and peak load stays below 600mA; avoid for 1A continuous loads in SOT-89-5 footprint.
MCP1700T-3302E/TT	250mA output, 6µA quiescent current, SOT-23-3 package	Targeted at ultra-low-power always-on sensors or RTC backup rails-not suitable for 1A loads	Choose only for sub-300mA applications requiring nanoamp IQ; not a functional replacement for AP2115R5A-3.3TRG1's 1A capability.

Compared with AP2115R5A-3.3TRG1, AP2112K-3.3TRG1 trades current capacity for package flexibility and thermal performance, while MCP1700T-3302E/TT offers extreme low-IQ but cannot support >250mA loads-making neither a drop-in substitute for 1A, SOT-89-5, low-noise applications.

Availability

AP2115R5A-3.3TRG1 is available at Aetrix Electronics and suitable for LCD monitor, set-top box, and industrial display controller designs requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated assembly.

Supply support for AP2115R5A-3.3TRG1 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

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-performance, cost-optimized power management solutions for consumer and industrial markets.

The AP2115 product line delivers low-noise, high-accuracy LDOs targeting space-constrained, thermally demanding applications in displays, digital home, and embedded systems-emphasizing ease of use and minimal external component count.

FAQ

What is the minimum input voltage required for AP2115R5A-3.3TRG1 to maintain regulation at 1A load?

The recommended minimum input voltage is 4.3V, based on the 450mV typical dropout voltage at 1A load. At 4.3V input, the regulator sustains 3.3V output under full load; operation below 4.3V risks dropout and unregulated output. Absolute minimum input is 2.5V per datasheet, but that applies only to lower output voltages (e.g., 1.2V version).

Can AP2115R5A-3.3TRG1 operate with a 2.2µF ceramic output capacitor?

No-datasheet specifies stable operation requires ≥4.7µF output capacitance (ceramic, tantalum, or aluminum electrolytic). Using 2.2µF may cause oscillation or poor transient response due to insufficient phase margin; 4.7µF is the validated minimum for all specified load and line conditions.

Does the EN pin require an external pull-up resistor?

No-internal 3.0MΩ pull-down resistor ensures default disable state when EN is left floating. An external pull-up is optional and only needed if active-high enable must be asserted by default at power-on; otherwise, drive EN directly from a GPIO or open-drain controller output.

Is AP2115R5A-3.3TRG1 qualified for automotive applications?

No-it is rated for industrial temperature range (–40°C to +85°C) and lacks AEC-Q100 qualification, automotive-grade screening, or extended reliability testing. It is intended for consumer and industrial equipment; automotive designs require explicitly qualified alternatives such as TPS7B67xx or NCP1117AUT33G.

AP2115R5A-3.3TRG1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-89-5/6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.75V @ 1A

Current - Output:: 1A

Current - Quiescent (Iq):: 90 µA

Current - Supply (Max):: -

PSRR:: 65dB (100Hz ~ 1kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-5

AP2115R5A-3.3TRG1 FAQ

1.How can I place an order for AP2115R5A-3.3TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2115R5A-3.3TRG1 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 AP2115R5A-3.3TRG1 reliable?

The price and inventory of AP2115R5A-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2115R5A-3.3TRG1 is usually 5 days.

3.What payment methods are accepted for AP2115R5A-3.3TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2115R5A-3.3TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2115R5A-3.3TRG1?

AP2115R5A-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2115R5A-3.3TRG1 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 AP2115R5A-3.3TRG1?

For technical support, including AP2115R5A-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2115R5A-3.3TRG1 requirements.

6.How does Aetrix verify that AP2115R5A-3.3TRG1 is sourced from the original manufacturer or authorized distributors?

All AP2115R5A-3.3TRG1 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 AP2115R5A-3.3TRG1 meets industry standards.

7.What is the process for return or replacement of AP2115R5A-3.3TRG1?

All AP2115R5A-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2115R5A-3.3TRG1, 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 AP2115R5A-3.3TRG1 part is unused and in its original packaging.

Return procedure for AP2115R5A-3.3TRG1:

1.Submit a request within 90 days.

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

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