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Diodes Incorporated AP2210K-2.5TRG1
- Part No.:
- AP2210K-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2210K-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,936
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Product details
Overview
AP2210K-2.5TRG1 from Diodes Incorporated is a 300mA ultra-low dropout (ULDO) linear regulator with fixed 2.5V output, 250mV dropout at full load, ±1% output accuracy, 75dB PSRR at 100Hz, and 1µA shutdown current. It serves as a low-noise power supply for RF front-ends, cellular handset baseband ICs, and portable sensor nodes requiring stable voltage under tight input headroom.
For engineers reviewing the AP2210K-2.5TRG1 datasheet, AP2210K-2.5TRG1 pinout, AP2210K-2.5TRG1 application, or AP2210K-2.5TRG1 equivalent, this device is selected for noise-sensitive analog/RF subsystems where dropout voltage, output accuracy, and standby current are critical selection criteria - not generic LDO use cases.
Technical Context
The AP2210K-2.5TRG1 uses a PMOS pass transistor architecture enabling ultra-low dropout and reverse current protection without external diodes. Its bandgap reference and error amplifier deliver ±1% initial accuracy and 48 ppm/°C temperature coefficient over –40°C to +125°C.
It integrates CMOS/TTL-compatible enable control, thermal shutdown, current limiting (450–900mA), and bypass-capacitor-based noise filtering. The SOT-23-5 package supports BYP pin connection for 260nV/√Hz output noise reduction in RF applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% (ensures stable bias for ADC references and RF synthesizers) |
| Max Output Current | 300mA continuous (supports baseband processors and multi-channel sensor interfaces) |
| Dropout Voltage | 250mV at 300mA (enables operation from 2.75V input when VOUT = 2.5V) |
| PSRR | 75dB at 100Hz (rejects switching noise from adjacent DC-DC converters) |
| Standby Current | 1µA max in shutdown (extends battery life in always-on IoT endpoints) |
| Output Noise | 260nV/√Hz (measured with 100pF BYP-to-GND capacitor; critical for VCO power rails) |
| Thermal Protection | Internally limited junction temperature (150°C) with automatic recovery (prevents latch-up during transient overload) |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body, matte tin-plated leads, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply rail | Accepts 2.5V–13.2V; must exceed VOUT by ≥250mV for regulation |
| 2 (GND) | Ground reference | Common return for input/output capacitors and enable logic; low-impedance path required for PSRR |
| 3 (EN) | Enable control input | CMOS/TTL compatible; high ≥2.0V enables regulator, low ≤0.4V disables with 1µA ISTD |
| 4 (BYP/ADJ) | Bypass capacitor terminal | Connects 100pF capacitor to GND to reduce output noise; not used in fixed-output versions |
| 5 (VOUT) | Regulated output | Delivers 2.5V ±1% to load; requires 2.2µF ceramic output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 250mV at 300mA enables single-cell Li-ion (3.0V min) or dual-cell NiMH (2.7V min) operation |
| Reverse current protection | Prevents backfeed from VOUT to VIN during shutdown - eliminates need for external blocking diode |
| Low-noise architecture | 260nV/√Hz output noise with BYP pin decoupling meets GSM/UMTS RF receiver power rail requirements |
| High PSRR at low frequency | 75dB at 100Hz suppresses ripple from buck converter switching frequencies and their harmonics |
| Thermal and overcurrent protection | Auto-recovery shutdown prevents damage during sustained overload or PCB thermal congestion |
Applications
| Cellular Baseband Power | RF Front-End Bias |
|---|---|
|
Use Scenario: Powering baseband processor I/O and memory interface circuits in 4G LTE handsets. IC Role / Device Role / Timing Role: Primary 2.5V ULDO supplying core logic voltage with minimal voltage headroom from shared 3.8V battery rail. Use Value: 250mV dropout extends usable battery range by >12 minutes before brownout versus standard LDOs; ±1% accuracy maintains timing margin for DDR interface clocks. |
Use Scenario: Providing clean bias to low-noise amplifiers (LNAs) and mixer stages in sub-6GHz 5G transceivers. IC Role / Device Role / Timing Role: Low-noise 2.5V rail isolated from noisy digital domains via 75dB PSRR and 260nV/√Hz noise floor. Use Value: Enables <–165dBm sensitivity in receive chain by preventing regulator-induced phase noise on local oscillator paths. |
| Portable Medical Sensors | Wearable Health Monitors |
|
Use Scenario: Supplying analog front-end (AFE) of ECG/PPG sensor modules in disposable patch monitors. IC Role / Device Role / Timing Role: Stable 2.5V reference source for 16-bit SAR ADCs and instrumentation amplifiers. Use Value: ±1% output accuracy directly limits gain error in biopotential measurement; 1µA shutdown current enables multi-week shelf life in sealed packaging. |
Use Scenario: Powering optical heart-rate sensors and motion co-processors in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Always-on 2.5V rail supporting wake-on-motion detection and periodic sensor sampling. Use Value: Ultra-low 1µA shutdown current extends coin-cell battery life to >6 months between replacements while maintaining fast wake-up response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low dropout, low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 250mA output, 600mV dropout at full load, 65dB PSRR at 100Hz, no BYP pin | Lacks dedicated noise-reduction bypass pin; unsuitable for VCO/PLL power rails requiring <300nV/√Hz | Select only if system PSRR requirement is ≤65dB and noise floor is not critical to RF performance |
| Torex XC6210B252MR-G | 300mA output, 200mV dropout at 100mA (not 300mA), 70dB PSRR, 350nV/√Hz noise | Higher output noise and lower PSRR limit use in high-sensitivity receivers | Acceptable for non-RF analog rails (e.g., op-amp supplies) but not RF signal chain biasing |
Compared with MCP1703T-2502E/MB and XC6210B252MR-G, AP2210K-2.5TRG1 uniquely delivers 250mV dropout at full 300mA load plus 260nV/√Hz noise with BYP pin support - making it the only option among the three qualified for RF synthesizer and LNA biasing in battery-constrained designs.
Availability
AP2210K-2.5TRG1 is available at Aetrix Electronics and suitable for cellular handset power management, RF front-end biasing, and portable medical sensor applications requiring stable component supply across production lifecycles.
Supply support for AP2210K-2.5TRG1 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 solutions for power management, signal integrity, and connectivity applications.
The AP2210 series belongs to Diodes' high-performance ULDO regulator product line, engineered specifically for battery-powered RF and portable electronics where dropout voltage, noise, and quiescent current directly impact system runtime and signal fidelity.
FAQ
What is the minimum input voltage required for AP2210K-2.5TRG1 to maintain regulation?
The minimum input voltage is VOUT + VDROP = 2.5V + 0.25V = 2.75V at 300mA load and +25°C. Per datasheet Note 4, the recommended minimum is VOUT + 1V = 3.5V to ensure full PSRR performance and avoid degradation near dropout. Below 3.5V, PSRR drops significantly, impacting noise-sensitive loads.
Can AP2210K-2.5TRG1 be used without the BYP capacitor?
Yes - the BYP pin is internally connected to the error amplifier's compensation node and may be left floating or tied to GND in fixed-output versions. However, connecting a 100pF capacitor from BYP to GND reduces output noise from ~500nV/√Hz to 260nV/√Hz, which is essential for RF applications. Omitting it degrades noise performance but does not affect regulation.
Does AP2210K-2.5TRG1 require an output capacitor for stability?
Yes - a minimum 2.2µF X5R/X7R ceramic capacitor is required at VOUT per datasheet Figure 1 and Absolute Maximum Ratings. Lower capacitance or high-ESR electrolytic capacitors cause oscillation or poor transient response. The device is optimized for ceramic output caps and does not support tantalum or aluminum electrolytic types.
How does thermal shutdown behave during overload conditions?
When junction temperature exceeds +150°C, the device enters thermal shutdown, disabling the pass transistor and reducing output current to near zero. Once TJ falls below +135°C (typical hysteresis), regulation automatically resumes. This cycle repeats until fault condition clears - protecting both the IC and PCB from thermal damage without requiring external reset circuitry.
AP2210K-2.5TRG1 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):
- 0.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 15 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
AP2210K-2.5TRG1 FAQ
1.How can I place an order for AP2210K-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2210K-2.5TRG1 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 AP2210K-2.5TRG1 reliable?
The price and inventory of AP2210K-2.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2210K-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2210K-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2210K-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2210K-2.5TRG1?
AP2210K-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2210K-2.5TRG1 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 AP2210K-2.5TRG1?
For technical support, including AP2210K-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2210K-2.5TRG1 requirements.
6.How does Aetrix verify that AP2210K-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2210K-2.5TRG1 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 AP2210K-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2210K-2.5TRG1?
All AP2210K-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2210K-2.5TRG1, 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 AP2210K-2.5TRG1 part is unused and in its original packaging.
Return procedure for AP2210K-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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