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Diodes Incorporated AP2205-28W5-7
- Part No.:
- AP2205-28W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2205-28W5-7.pdf
- Description:
- IC REG LINEAR 2.8V 250MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,204
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Product details
Overview
AP2205-28W5-7 from Diodes Incorporated is a fixed-output 2.8V ultra-low dropout (ULDO) linear regulator IC designed for space-constrained portable and battery-powered systems. It delivers up to 200mA output current with 100mV dropout at 100µA load, 60dB PSRR at 1kHz, ±2% output voltage accuracy, and 36µA ground current at light load-enabling stable power for USB peripherals and low-power microcontrollers.
For engineers reviewing the AP2205-28W5-7 datasheet, AP2205-28W5-7 pinout, AP2205-28W5-7 application, or AP2205-28W5-7 equivalent, key selection criteria include its 2.3V–24V input range, thermal shutdown, reverse current protection, SOT25 package footprint, and compatibility with low-ESR ceramic capacitors in high-efficiency LDO designs.
Technical Context
The AP2205-28W5-7 integrates a precision 1.24V bandgap reference, error amplifier, and current-limit circuit within a high-voltage EPNP process. Its internal resistor network fixes VOUT at 2.8V with ±2% tolerance over –40°C to +125°C junction temperature.
It features active enable control (EN pin), ultra-low quiescent current (≤1µA in shutdown), and built-in protections including overcurrent, overtemperature, and reverse-current blocking-making it suitable for always-on subsystems requiring reliable start-up and fault resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% - ensures stable rail for 2.8V logic, sensors, or RF front-ends without external feedback. |
| Input Voltage Range | 2.3V to 24V - supports single-cell Li-ion, multi-cell alkaline, and industrial 12V/24V supplies. |
| Max Output Current | 200mA @ VOUT ≥ 2.3V - sufficient for MCU cores, BLE radios, and small displays. |
| Dropout Voltage | 100mV @ IOUT = 100µA - enables regulation down to VIN = 2.9V, extending battery runtime. |
| PSRR | 60dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO. |
| Ground Current | 36µA @ IOUT = 100µA - minimizes standby power loss in battery-critical applications. |
| Thermal Shutdown | Active at TJ ≈ +150°C - prevents damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 (SC-74A) package: 5-pin surface-mount, 1.6mm × 2.8mm footprint, 1.1mm height, lead-free matte tin plating, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 2.3–24V; requires 1.0µF ceramic input capacitor for stability. |
| 2 (GND) | Power ground reference | Common return path for regulator core, EN, and output; must be low-impedance. |
| 3 (EN) | Enable control input | Active-high logic: ≥2.0V enables regulation; ≤0.4V disables output and reduces IQ to 0.01µA. |
| 4 (ADJ/NC) | Adjust pin / No-connect | No-connect for fixed 2.8V version; left floating or grounded per layout best practice. |
| 5 (VOUT) | Regulated output | Delivers 2.8V ±2%; requires 2.2µF ceramic output capacitor for transient response and PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 2.3V–24V enables single-part support across battery chemistries and industrial rails. |
| Ultra-low quiescent current | 36µA typical at light load extends shelf life and runtime in IoT endpoints. |
| Reverse current protection | Blocks backflow from VOUT to VIN during shutdown or input brownout-no external diode needed. |
| Low-ESR capacitor compatible | Stable with 2.2µF X5R/X7R ceramics-reduces BOM count and board area vs. tantalum solutions. |
| Thermal and overcurrent protection | Auto-recovery shutdown prevents latch-up during short-circuit or ambient overheating. |
Applications
| USB Peripheral Power | Industrial Sensor Node |
|---|---|
Use Scenario: Powering USB HID devices (keyboards, mice) from variable wall adapters or battery packs. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying MCU, USB transceiver, and EEPROM. Use Value: 60dB PSRR rejects ripple from noisy AC/DC adapters; 200mA headroom supports burst-mode USB enumeration. | Use Scenario: Remote environmental monitoring node powered by 3.6V Li-SOCl₂ battery with 10-year lifespan target. IC Role / Device Role / Timing Role: Always-on 2.8V rail for ultra-low-power MCU, analog sensor interface, and LoRaWAN transceiver. Use Value: 36µA ground current and 0.01µA shutdown current minimize self-discharge; wide VIN accommodates battery decay from 3.6V to 2.3V. |
| Portable Medical Device | Automotive Body Control Module |
Use Scenario: Handheld pulse oximeter using single AAA battery and OLED display. IC Role / Device Role / Timing Role: Main 2.8V supply for optical sensor ASIC, ADC, and display driver IC. Use Value: 100mV dropout preserves regulation until battery reaches 2.9V; ±2% accuracy ensures consistent LED drive and ADC reference. | Use Scenario: Interior lighting control unit operating from 12V vehicle bus with cold-crank tolerance. IC Role / Device Role / Timing Role: Secondary 2.8V rail for CAN transceiver bias and microcontroller I/O domain. Use Value: 24V absolute max rating withstands load-dump transients; thermal shutdown protects during enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/MB | 200mA max, 6µA IQ, but only 13.2V max VIN and no reverse current protection. | Limited to low-voltage battery systems; unsuitable for 24V industrial or automotive inputs. | Select when ultra-low IQ dominates requirements and input stays ≤13.2V. |
| TNIV5028002RA | 250mA max, 2.5µA IQ, 40V max VIN, but ±3% output tolerance and no EN pin. | Lacks enable control and tighter accuracy; better for always-on, non-shutdown use cases. | Select when higher current and wider VIN are critical, and enable functionality is unnecessary. |
Compared with MCP1700T-2802E/MB and TNIV5028002RA, the AP2205-28W5-7 uniquely balances 24V input capability, reverse current blocking, and 2.8V ±2% accuracy in a 5-pin SOT25-making it optimal for battery-to-24V adaptable systems requiring robust enable control and low-noise output.
Availability
AP2205-28W5-7 is available at Aetrix Electronics and suitable for USB peripheral power, industrial sensor nodes, portable medical devices, and automotive body control modules requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AP2205-28W5-7 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP2205 series belongs to Diodes' high-voltage LDO portfolio, engineered specifically for wide-input, low-noise, battery-sensitive applications in portable, industrial, and automotive electronics.
FAQ
What is the minimum input voltage required for regulation at 2.8V output?
The AP2205-28W5-7 maintains regulation down to VIN = 2.9V under light load (100µA), based on its 100mV dropout specification. At full 200mA load, dropout rises to ~360mV, requiring VIN ≥ 3.16V. Input must remain ≥2.3V per absolute ratings, but functional regulation starts above VOUT + VDROP.
Can the AP2205-28W5-7 be used with ceramic output capacitors?
Yes-it is explicitly designed for low-ESR ceramic capacitors. The datasheet specifies stability with a 2.2µF X5R or X7R ceramic output capacitor. Tantalum or aluminum electrolytic capacitors are not required and may degrade transient response due to higher ESR.
Does the EN pin support partial enable functionality or only on/off control?
The EN pin operates as a digital enable input only: logic high (≥2.0V) enables regulation; logic low (≤0.4V) forces full shutdown with <1.0µA standby current. There is no analog dimming, soft-start modulation, or intermediate states-the EN function is strictly binary.
Is the SOT25 package thermally adequate for 200mA continuous operation?
In free-air conditions, the SOT25 package has θJA = 160°C/W. At 200mA and 2.8V output with 12V input (9.2V drop × 0.2A = 1.84W dissipation), junction temperature rise would exceed safe limits. Derating is required: continuous 200mA is viable only with PCB copper thermal relief (≥1.5cm² pad) or ambient ≤45°C.
AP2205-28W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- Enable
- 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-25
AP2205-28W5-7 FAQ
1.How can I place an order for AP2205-28W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2205-28W5-7 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 AP2205-28W5-7 reliable?
The price and inventory of AP2205-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2205-28W5-7 is usually 5 days.
3.What payment methods are accepted for AP2205-28W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2205-28W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2205-28W5-7?
AP2205-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2205-28W5-7 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 AP2205-28W5-7?
For technical support, including AP2205-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2205-28W5-7 requirements.
6.How does Aetrix verify that AP2205-28W5-7 is sourced from the original manufacturer or authorized distributors?
All AP2205-28W5-7 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 AP2205-28W5-7 meets industry standards.
7.What is the process for return or replacement of AP2205-28W5-7?
All AP2205-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2205-28W5-7, 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 AP2205-28W5-7 part is unused and in its original packaging.
Return procedure for AP2205-28W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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