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Diodes Incorporated AP2202K-2.5TRE1
- Part No.:
- AP2202K-2.5TRE1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2202K-2.5TRE1.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
AP2202K-2.5TRE1 from Diodes Incorporated is a fixed-output 2.5V, 150mA ultra-low dropout (ULDO) linear regulator with 165mV typical dropout at full load, ±1% output voltage accuracy, and 75dB PSRR at 100Hz-designed for noise-sensitive RF power rails in handheld wireless devices.
For engineers reviewing the AP2202K-2.5TRE1 datasheet, AP2202K-2.5TRE1 pinout, AP2202K-2.5TRE1 application, or AP2202K-2.5TRE1 equivalent, key selection criteria include low-noise operation (260nV/√Hz), sub-1µA shutdown current, thermal/overcurrent protection, and SOT-23-5 package compatibility with space-constrained portable designs.
Technical Context
The AP2202K-2.5TRE1 integrates a bandgap reference, error amplifier, and PMOS pass transistor to deliver stable 2.5V output with minimal input-to-output differential. Its internal architecture enables ultra-low dropout while maintaining high PSRR across 10Hz–100kHz.
Logic-compatible enable (EN) input supports CMOS/TTL-level control with 0.4V max logic-low threshold and 2.0V min logic-high threshold. The BYP pin accepts a 100pF capacitor to reduce output noise and improve transient response in RF supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% - ensures precise biasing for RF ICs and ADC references without external feedback. |
| Max Output Current | 150mA - sufficient for powering single-band RF transceivers or low-power microcontrollers. |
| Dropout Voltage | 165mV at 150mA - allows operation from 2.66V input (e.g., single Li-ion cell post-regulation). |
| PSRR | 75dB at 100Hz - suppresses switching noise from upstream DC-DC converters feeding RF sections. |
| Standby Current | 1µA max in shutdown - extends battery life in always-on sensor or standby-mode communication modules. |
| Output Noise | 260nV/√Hz - meets stringent spectral purity requirements for LNA and mixer supply rails. |
| Thermal Protection | Integrated junction temperature shutdown - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT-23-5 surface-mount package with exposed pad (pin 2 = GND/TAB), optimized for thermal dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 2.5V–13.2V input; minimum 2.66V required for 2.5V output at 150mA due to dropout. |
| 2 (GND) | Ground reference and thermal path | Internal die substrate connection; soldered tab improves thermal resistance to PCB (θJA = 200°C/W). |
| 3 (EN) | Enable control input | CMOS/TTL-compatible; drives regulator ON when ≥2.0V, OFF when ≤0.4V - enables system-level power sequencing. |
| 4 (BYP) | Bypass capacitor terminal | Connects 100pF capacitor to GND to filter internal reference noise and enhance high-frequency PSRR. |
| 5 (VOUT) | Regulated output | Delivers stable 2.5V ±1% under load steps up to 150mA; requires 2.2µF ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 165mV at 150mA enables use with single-cell Li-ion (2.7–4.2V) or partially discharged batteries. |
| High PSRR | 75dB at 100Hz rejects ripple from switching regulators, critical for RF front-end signal integrity. |
| Low-noise output | 260nV/√Hz output noise minimizes phase noise degradation in VCO and PLL supply domains. |
| Reverse current protection | Prevents backflow from VOUT to VIN during shutdown or input brownout - protects upstream sources. |
| Overtemperature shutdown | Thermal foldback activates at +150°C junction temperature, allowing safe recovery after cooling. |
Applications
| Cellular Handset RF Supply | Digital Still Camera Sensor Bias |
|---|---|
|
Use Scenario: Powering RF power amplifier (PA) bias rail in GSM/UMTS handsets where supply noise directly impacts adjacent channel leakage ratio (ACLR). IC Role / Device Role / Timing Role: ULDO regulator providing clean 2.5V bias to PA driver stage with fast load transient response. Use Value: 165mV dropout preserves headroom from 2.8V battery rail; 75dB PSRR prevents DC-DC switching noise from modulating PA output. |
Use Scenario: Supplying image sensor analog core requiring low-noise, stable voltage to minimize fixed-pattern noise (FPN) and dark current drift. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated 2.5V to CCD/CMOS sensor analog block during exposure and readout phases. Use Value: 260nV/√Hz noise floor prevents pixel-level voltage fluctuations; ±1% accuracy maintains consistent ADC reference scaling. |
| Wireless Communicator Baseband Core | PDA/Palmtop Audio Codec Supply |
|
Use Scenario: Providing core voltage to baseband processor I/O or memory interface in Bluetooth/Wi-Fi modules operating from shared battery rails. IC Role / Device Role / Timing Role: Enable-controlled LDO supplying 2.5V to processor I/O banks during active data transfer, shut down during sleep. Use Value: 1µA shutdown current extends module standby time; logic-compatible EN simplifies GPIO-based power management. |
Use Scenario: Powering stereo audio codec analog section in portable PDAs where supply ripple causes audible hum or distortion. IC Role / Device Role / Timing Role: Low-noise regulator isolating codec analog supply from noisy digital subsystems on shared PCB. Use Value: High PSRR at audio frequencies (75dB @100Hz) eliminates 100Hz/120Hz ripple from AC adapters or charge pumps. |
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 |
|---|---|---|---|
| MCP1700T-2502E/MB | 250mA output, 175mV dropout at 250mA, 65dB PSRR at 100Hz, no BYP pin | Lacks dedicated bypass pin for noise filtering; lower PSRR limits suitability for RF supply rails | Preferred for higher-current digital I/O rails where noise sensitivity is moderate |
| TCS2115-2.5 | 150mA output, 200mV dropout at 150mA, 70dB PSRR at 100Hz, 300nV/√Hz noise | Higher dropout and noise reduce margin in low-input-voltage RF applications | Acceptable for non-critical analog supplies where board space permits larger input capacitors |
Compared with MCP1700T-2502E/MB and TCS2115-2.5, the AP2202K-2.5TRE1 delivers superior RF-grade performance via its 165mV dropout, 75dB PSRR, and 260nV/√Hz noise-making it optimal for battery-powered, noise-sensitive signal chains where every millivolt of headroom and decibel of rejection matters.
Availability
AP2202K-2.5TRE1 is available at Aetrix Electronics and suitable for cellular handset RF supply, digital still camera sensor bias, wireless communicator baseband core, and PDA/palmtop audio codec supply requiring stable component supply across production lifecycles.
Supply support for AP2202K-2.5TRE1 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 consumer, industrial, and automotive markets.
The AP2202 series belongs to Diodes' ultra-low-noise LDO portfolio, engineered specifically for RF and precision analog applications where power supply integrity directly impacts system-level RF performance and signal fidelity.
FAQ
What is the minimum input voltage required for AP2202K-2.5TRE1 to maintain regulation at 150mA load?
The minimum input voltage is 2.665V, calculated as VOUT + VDROP = 2.5V + 165mV. At 150mA and +25°C, the device sustains regulation down to this differential. For robust operation across temperature and process variation, Diodes recommends VIN ≥ VOUT + 0.5V (i.e., ≥3.0V) per datasheet Note 4.
Can the BYP pin be left unconnected if low-noise operation is not required?
No. The BYP pin must be connected to a 100pF capacitor to ground per the functional block diagram and Typical Applications Circuit. Leaving it open degrades PSRR and increases output noise beyond specified 260nV/√Hz, as the internal reference bypass path is incomplete.
Does AP2202K-2.5TRE1 require an external output capacitor, and what type is recommended?
Yes. A minimum 2.2µF X5R/X7R ceramic capacitor must be placed at VOUT, as specified in the Typical Applications Circuit and Absolute Maximum Ratings. This capacitor ensures loop stability, load transient response, and ESR-related damping; tantalum or aluminum electrolytic types are not recommended due to higher ESR and aging effects.
How does the enable (EN) pin behave during power-up, and is an external pull-up required?
The EN pin has no internal pull-up; it defaults to high-impedance. To ensure predictable startup, Diodes specifies that EN must be actively driven to ≥2.0V for enable or ≤0.4V for shutdown. An external pull-up resistor (e.g., 100kΩ to VIN) is required if system reset logic does not assert EN at power-on to prevent undefined output state.
AP2202K-2.5TRE1 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):
- 13.2V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 75dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP2202K-2.5TRE1 FAQ
1.How can I place an order for AP2202K-2.5TRE1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2202K-2.5TRE1 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 AP2202K-2.5TRE1 reliable?
The price and inventory of AP2202K-2.5TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2202K-2.5TRE1 is usually 5 days.
3.What payment methods are accepted for AP2202K-2.5TRE1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2202K-2.5TRE1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2202K-2.5TRE1?
AP2202K-2.5TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2202K-2.5TRE1 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 AP2202K-2.5TRE1?
For technical support, including AP2202K-2.5TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2202K-2.5TRE1 requirements.
6.How does Aetrix verify that AP2202K-2.5TRE1 is sourced from the original manufacturer or authorized distributors?
All AP2202K-2.5TRE1 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 AP2202K-2.5TRE1 meets industry standards.
7.What is the process for return or replacement of AP2202K-2.5TRE1?
All AP2202K-2.5TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2202K-2.5TRE1, 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 AP2202K-2.5TRE1 part is unused and in its original packaging.
Return procedure for AP2202K-2.5TRE1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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