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Diodes Incorporated AP2205-28YR-13
- Part No.:
- AP2205-28YR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP2205-28YR-13.pdf
- Description:
- IC REG LINEAR 2.8V 250MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,579
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Product details
Overview
AP2205-28YR-13 from Diodes Incorporated is a fixed-output 2.8V ultra-low dropout (ULDO) linear regulator IC with 200mA output capability, fabricated using high-voltage EPNP process. It features 2.3V–24V input range, 100mV dropout at 100µA load, ±2% output voltage accuracy, 60dB PSRR at 1kHz, and integrated protections including thermal shutdown, overcurrent, overtemperature, reverse current, and low-power enable control - deployed in battery-powered portable electronics requiring stable low-noise supply rails.
For engineers reviewing the AP2205-28YR-13 datasheet, AP2205-28YR-13 pinout, AP2205-28YR-13 application, or AP2205-28YR-13 equivalent, key selection criteria include dropout performance under light-load conditions, ground current vs. load profile, EN pin threshold compatibility with 1.8V/3.3V logic, SOT89R thermal resistance (26°C/W), and fixed 2.8V output suitability for RF front-end biasing or MCU core supply in space-constrained designs.
Technical Context
The AP2205-28YR-13 implements a precision bandgap reference (1.24V typ), error amplifier, and resistor network trimmed for 2.8V fixed output. Its EPNP-based pass transistor enables ultra-low quiescent current (36µA at 100µA load) and supports operation down to 2.3V input while maintaining regulation - critical for single-cell Li-ion or multi-cell alkaline systems.
Thermal protection activates at +150°C junction temperature, and the EN pin (2.0V "high", 0.4V "low") provides logic-controlled shutdown with standby current ≤1.0µA. The device is internally compensated and compatible with low-ESR ceramic capacitors (1.0µF input, 2.2µF output), eliminating need for external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% - ensures stable bias for 2.8V I/O domains or analog sensors without external feedback resistors. |
| Input Voltage Range | 2.3V to 24V - supports direct connection to unregulated battery stacks, automotive rails, or industrial 24V supplies. |
| Max Output Current | 200mA @ VOUT > 1.8V - sufficient for powering microcontrollers, RF transceivers, or small displays in portable devices. |
| Dropout Voltage | 100mV @ IOUT = 100µA - enables regulation with minimal headroom, extending battery runtime in low-power sleep modes. |
| PSRR | 60dB @ 1kHz - suppresses switching noise from upstream DC-DC converters, preserving signal integrity in sensitive analog sections. |
| Quiescent Current | 36µA @ IOUT = 100µA - minimizes no-load power loss, critical for always-on monitoring circuits and energy-harvesting applications. |
| Enable Threshold | VEN(H) ≥ 2.0V, VEN(L) ≤ 0.4V - compatible with standard 1.8V and 3.3V GPIOs for seamless system-level power sequencing. |
Pinout & Package
SOT89R package: 3-pin thermally enhanced variant with exposed substrate pad (pin 2), rated θJC = 26°C/W and θJA = 129°C/W on 2-layer FR-4 PCB. Substrate must be connected to GND for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference and thermal path - connects to PCB ground plane via exposed pad for heat dissipation. |
| 2 | VIN | Main input supply - accepts 2.3V–24V; requires 1.0µF ceramic decoupling close to pin. |
| 3 | VOUT | Regulated 2.8V output - delivers up to 200mA; requires 2.2µF ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 100mV at 100µA load enables operation near battery end-of-life (e.g., 2.9V → 2.8V regulation from 1×Li-ion). |
| Low ground current | 36µA at light load reduces system standby power - essential for IoT edge nodes with multi-year battery life targets. |
| High PSRR | 60dB at 1kHz rejects ripple from noisy switchers, enabling clean analog supply without additional LDO staging. |
| Integrated protections | Thermal shutdown, overcurrent, overtemperature, and reverse-current blocking eliminate need for external protection circuitry. |
| Logic-compatible enable | EN pin thresholds (2.0V/0.4V) allow direct interfacing with 1.8V/3.3V MCUs - simplifies power sequencing in multi-rail systems. |
Applications
| Wireless Sensor Node Power | Portable Medical Device Bias |
|---|---|
|
Use Scenario: Powering BLE SoC (e.g., nRF52840) and analog front-end (AFE) from single 3.7V Li-ion cell during active and deep-sleep modes. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying RF transceiver I/O and AFE reference voltage; enables <10µA system sleep current. Use Value: 100mV dropout preserves usable battery capacity down to 2.9V, extending operational life by >15% versus higher-dropout alternatives. |
Use Scenario: Providing regulated 2.8V rail to optical pulse oximeter sensor and low-noise ADC in handheld patient monitor. IC Role / Device Role / Timing Role: Low-noise analog supply LDO with 30µVRMS output noise; powers ADC reference and photodiode bias circuitry. Use Value: 60dB PSRR at 1kHz suppresses switching artifacts from adjacent DC-DC converter, improving SpO₂ measurement SNR by ≥8dB. |
| Industrial Handheld Terminal | Automotive Infotainment Accessory |
|
Use Scenario: Supplying 2.8V to display driver IC and touch controller in ruggedized warehouse scanner operating across -20°C to +70°C ambient. IC Role / Device Role / Timing Role: Main system LDO with thermal shutdown and ±100ppm/°C tempco - maintains output stability during rapid temperature cycling. Use Value: SOT89R package delivers 26°C/W θJC, enabling 200mA continuous output without heatsink at 60°C ambient. |
Use Scenario: Generating 2.8V for USB-C PD controller logic and status LED driver in vehicle-mounted smartphone cradle. IC Role / Device Role / Timing Role: Secondary LDO fed from 5V USB-PD rail; provides fault-isolated 2.8V domain with reverse-current blocking. Use Value: Integrated reverse-current protection prevents backfeed into USB port during hot-plug events, satisfying USB-IF compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | 2.8V fixed, 250mA, 600mV dropout @ 250mA; higher quiescent current (4µA vs. 36µA) | Lacks EN pin and reverse-current protection; requires external enable circuitry for power sequencing | Preferred where higher output current is needed and thermal margin allows larger dropout. |
| NCP1117ST28T3G | 2.8V fixed, 1A, 1.2V dropout @ 800mA; TO-220/SOT-223 package only | No enable function; no reverse-current blocking; higher minimum input voltage (4.75V) | Only suitable when high current (>200mA) and board space permit larger package; not drop-in for SOT89R footprint. |
Compared with MCP1703T-2802E/MB and NCP1117ST28T3G, the AP2205-28YR-13 uniquely combines SOT89R thermal efficiency, sub-100mV light-load dropout, integrated EN control, and reverse-current blocking - making it optimal for compact, battery-sensitive, and safety-critical portable designs where footprint and power integrity are prioritized over raw current capacity.
Availability
AP2205-28YR-13 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial handheld terminals, and automotive infotainment accessories requiring stable component supply with consistent parametric performance across temperature and load.
Supply support for AP2205-28YR-13 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 AP2205 series belongs to Diodes' ultra-low dropout linear regulator product line, engineered specifically for battery-powered and noise-sensitive applications demanding wide input range, low quiescent current, and robust protection features.
FAQ
What is the minimum input voltage required for regulation at 2.8V output?
The AP2205-28YR-13 maintains regulation down to VIN = 2.3V, as specified in Recommended Operating Conditions. At 2.8V output, this yields only 0.5V headroom - sufficient due to its 100mV dropout at light loads. However, full 200mA output requires VIN ≥ VOUT + 0.32V (3.12V) per Electrical Characteristics table.
Can the AP2205-28YR-13 be used with ceramic output capacitors?
Yes - the AP2205-28YR-13 is explicitly designed for compatibility with low-ESR ceramic capacitors. The datasheet specifies 2.2µF X5R/X7R ceramic output capacitance for stability, with no requirement for series ESR or external compensation components.
Does the SOT89R package require soldering the exposed pad to ground?
Yes - the substrate/exposed pad (pin 2) must be connected to GND per datasheet Note 4. This connection provides the primary thermal conduction path and improves electrical noise immunity; leaving it floating degrades thermal resistance by >40% and risks instability.
How does the EN pin behave during power-up and brown-out conditions?
The EN pin has hysteresis-free TTL/CMOS-compatible thresholds: output enables when VEN rises above 2.0V and disables when VEN falls below 0.4V. During brown-out, the regulator remains enabled until VEN drops below 0.4V - ensuring clean shutdown without oscillation, and standby current drops to ≤1.0µA in disabled state.
AP2205-28YR-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 150mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz ~ 1kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP2205-28YR-13 FAQ
1.How can I place an order for AP2205-28YR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2205-28YR-13 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 AP2205-28YR-13 reliable?
The price and inventory of AP2205-28YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-28YR-13 is usually 5 days.
3.What payment methods are accepted for AP2205-28YR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-28YR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2205-28YR-13?
AP2205-28YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2205-28YR-13 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 AP2205-28YR-13?
For technical support, including AP2205-28YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-28YR-13 requirements.
6.How does Aetrix verify that AP2205-28YR-13 is sourced from the original manufacturer or authorized distributors?
All AP2205-28YR-13 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 AP2205-28YR-13 meets industry standards.
7.What is the process for return or replacement of AP2205-28YR-13?
All AP2205-28YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-28YR-13, 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 AP2205-28YR-13 part is unused and in its original packaging.
Return procedure for AP2205-28YR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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