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

Diodes Incorporated AP2204RA-3.3TRG1

Name: AP2204RA-3.3TRG1
Brand: Diodes Incorporated
SKU: AP2204RA-3.3TRG1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2204RA-3.3TRG1

Manufacturer:: Diodes Incorporated

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

Package:: TO-243AA

Datasheet:: AP2204RA-3.3TRG1.pdf

Description:: IC REG LINEAR 3.3V 150MA SOT89-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP2204RA-3.3TRG1 from Diodes Incorporated is a fixed-output 3.3V ultra-low dropout (ULDO) linear regulator with 150mA output current capability, 2.6V–24V input range, 100mV dropout at 100µA, ±2% output voltage accuracy, and 60dB PSRR at 1kHz-designed for USB-powered portable equipment requiring stable low-noise bias under wide input conditions.

For engineers reviewing the AP2204RA-3.3TRG1 datasheet, AP2204RA-3.3TRG1 pinout, AP2204RA-3.3TRG1 application, or AP2204RA-3.3TRG1 equivalent, key selection criteria include dropout behavior at light load, thermal performance in SOT-89 (RA) package, enable control timing, ground current vs. load, and compatibility with ceramic output capacitors.

Technical Context

The AP2204RA-3.3TRG1 integrates a precision 1.24V bandgap reference, error amplifier, resistor network for fixed 3.3V output, current-limit protection, thermal shutdown, and an active-high enable circuit. Its EPNP process enables high-voltage tolerance while maintaining low quiescent current.

It operates across –40°C to +125°C junction temperature, supports input voltages up to 24V, and delivers regulated 3.3V output with <±100 ppm/°C temperature coefficient and 30µV_RMS integrated noise (10Hz–100kHz). The RA variant of SOT-89 ties the exposed pad to VIN for improved high-side thermal coupling.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±2% - ensures stable logic-level supply for 3.3V microcontrollers and peripherals without external feedback.
Input Voltage Range	2.6V to 24V - supports single-cell Li-ion (3.0–4.2V), multi-cell battery stacks, and industrial 12V/24V rails.
Dropout Voltage	100mV @ 100µA; 360mV @ 150mA - enables regulation down to V_IN = 3.66V at full load, critical for battery end-of-life operation.
PSRR	60dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input.
Quiescent Current	20µA @ zero load; 2.5mA @ 150mA - balances ultra-low standby power with full-load efficiency in always-on subsystems.
Thermal Resistance θ_JA	165°C/W (SOT-89 RA) - requires minimal copper area for thermal relief in space-constrained portable PCBs.
Enable Threshold	V_EN(HI) ≥ 2.0V; V_EN(LO) ≤ 0.4V - compatible with standard GPIOs and open-drain controllers without level-shifting.

Pinout & Package

SOT-89 (RA) package: 3-pin surface-mount with exposed pad connected to VIN for enhanced thermal conduction from die to PCB plane. Pin 1 = GND, Pin 2 = VOUT, Pin 3 = VIN. Exposed pad must be soldered to VIN-copper pour.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground reference	Primary return path for output current and internal bias; connects to system ground plane.
2 (VOUT)	Regulated output	Delivers stable 3.3V to load; requires 2.2µF ceramic capacitor placed within 3mm for stability.
3 (VIN)	Input supply	Accepts 2.6–24V; also connects to exposed pad for thermal transfer and reduced impedance path.

Key Features

Feature	Design Value
Ultra-low dropout	100mV at 100µA enables operation with <3.4V input - extends runtime in battery-powered systems nearing depletion.
Low-noise regulation	30µV_RMS (10Hz–100kHz) minimizes jitter in ADC references and RF front-end biasing.
High PSRR	60dB at 1kHz rejects ripple from noisy switchers - eliminates need for additional LC filtering stages.
Thermal shutdown	Activates at +150°C junction temperature - protects device during sustained overload or poor PCB heatsinking.
Ceramic capacitor compatible	Stable with ≥2.2µF X5R/X7R MLCCs - reduces BOM count and board area vs. tantalum or electrolytic alternatives.

Applications

USB-C Power Delivery Sink

Industrial Sensor Node

Use Scenario: Regulating 5V/9V/15V PD bus down to clean 3.3V for MCU, BLE radio, and analog front-end.

IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, enable-controlled 3.3V rail with fast transient response to burst-mode wireless transmission.

Use Value: 60dB PSRR prevents PD converter switching noise from modulating sensor readings or degrading radio sensitivity.

Use Scenario: Powering low-power wide-area IoT node (LoRaWAN/NB-IoT) operating from 3.6V lithium-thionyl chloride battery.

IC Role / Device Role / Timing Role: Always-on ULDO supplying 3.3V to microcontroller in deep-sleep mode (20µA I_Q) and waking to transmit (150mA peak).

Use Value: 100mV dropout at µA loads extends usable battery life by >15% compared to standard LDOs at end-of-discharge voltage.

Portable Medical Monitor

Automotive Infotainment Accessory

Use Scenario: Providing ECG/SpO₂ analog signal chain bias from single 3.7V Li-ion cell with strict noise and drift requirements.

IC Role / Device Role / Timing Role: Precision analog supply rail with <±100 ppm/°C drift and 30µV_RMS noise - referenced directly to ADC and op-amp stages.

Use Value: Low temperature coefficient ensures measurement accuracy across –10°C to +50°C clinical operating range without calibration drift.

Use Scenario: Powering USB hub, display controller, or audio codec in aftermarket car accessory powered from 12V vehicle bus.

IC Role / Device Role / Timing Role: Input-transient-hardened LDO accepting 9–16V automotive input with thermal shutdown and enable sequencing.

Use Value: 24V absolute max rating and 165°C/W θ_JA allow direct connection to unregulated 12V rail without pre-regulation stage.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output ULDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3302E/TO	250mA rated, 175mV dropout @ 250mA, 65dB PSRR @ 1kHz, SOT-23-3 package	Lacks enable pin and thermal shutdown; lower max input (13.2V)	Preferred where higher output current and smaller footprint are needed, but system-level enable control and overtemperature protection are handled externally.
TPS7A2033PDQNR	300mA rated, 175mV dropout @ 300mA, 70dB PSRR @ 100kHz, 25µA I_Q, WSON-6 package	Higher PSRR bandwidth, smaller WSON package, no exposed-pad VIN tie	Chosen when ultra-low noise at RF frequencies and space-constrained layouts outweigh cost and thermal coupling advantages of SOT-89 RA.

Compared with MCP1700-3302E/TO and TPS7A2033PDQNR, AP2204RA-3.3TRG1 offers superior thermal coupling via VIN-tied exposed pad and wider input range (24V vs. 13.2V/6V), making it optimal for industrial and automotive auxiliary rails where input transients and board-level heat dissipation are primary constraints.

Availability

AP2204RA-3.3TRG1 is available at Aetrix Electronics and suitable for USB-C peripheral design, battery-powered medical monitors, industrial sensor nodes, and automotive infotainment accessories requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AP2204RA-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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP2204 series belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for portable and battery-critical applications demanding low dropout, low noise, and robust thermal performance across extended voltage ranges.

FAQ

What is the minimum input voltage required for regulation at full 150mA load?

The datasheet specifies minimum input voltage as the larger of 2.6V or V_OUT + 1V. For AP2204RA-3.3TRG1, this means V_IN(min) = 4.3V at 150mA, since dropout rises to 360mV at that load. Below 4.3V, output voltage will drop out of regulation and track input minus dropout voltage.

Can the exposed pad on the SOT-89 (RA) package be left floating or tied to GND?

No - the RA variant's exposed pad is electrically connected to VIN internally and must be soldered to the VIN copper pour. Floating or grounding it violates the thermal and electrical design, risking thermal runaway and potential damage. The RA pinout explicitly states "substrate/exposed pad should be connected to VIN" (Note 5).

Does AP2204RA-3.3TRG1 require an external capacitor on the ADJ pin?

No - AP2204RA-3.3TRG1 is a fixed-output version; the ADJ pin is not present in the SOT-89 (RA) 3-pin configuration. Only adjustable versions (e.g., AP2204MP-ADJTRG1) use the ADJ pin, which requires external resistors. This part has no ADJ terminal and no associated capacitor requirement.

How does the enable function behave during power-up and brown-out conditions?

The EN pin is active-high with 2.0V threshold. When EN falls below 0.4V, the output is actively discharged through an internal 200Ω switch to GND, ensuring fast, controlled shutdown. During power-up, output follows input only after EN exceeds 2.0V - preventing false turn-on from slow-rising control signals or noise.

AP2204RA-3.3TRG1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 24V

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

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 150mA

Current - Output:: 150mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: 2.5 mA

PSRR:: 60dB (100Hz ~ 1kHz)

Control Features:: -

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

AP2204RA-3.3TRG1 FAQ

1.How can I place an order for AP2204RA-3.3TRG1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2204RA-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 AP2204RA-3.3TRG1 reliable?

The price and inventory of AP2204RA-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 AP2204RA-3.3TRG1 is usually 5 days.

3.What payment methods are accepted for AP2204RA-3.3TRG1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2204RA-3.3TRG1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2204RA-3.3TRG1?

AP2204RA-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2204RA-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 AP2204RA-3.3TRG1?

For technical support, including AP2204RA-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2204RA-3.3TRG1 requirements.

6.How does Aetrix verify that AP2204RA-3.3TRG1 is sourced from the original manufacturer or authorized distributors?

All AP2204RA-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 AP2204RA-3.3TRG1 meets industry standards.

7.What is the process for return or replacement of AP2204RA-3.3TRG1?

All AP2204RA-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2204RA-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 AP2204RA-3.3TRG1 part is unused and in its original packaging.

Return procedure for AP2204RA-3.3TRG1:

1.Submit a request within 90 days.

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

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