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Diodes Incorporated AP2127K-2.5TRG1
- Part No.:
- AP2127K-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2127K-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
AP2127K-2.5TRG1 from Diodes Incorporated is a 300mA, 2.5V fixed-output CMOS low-dropout (LDO) regulator in SOT-23-5 package. It delivers ±2% output voltage accuracy, 170mV dropout at 300mA, 60μA typical quiescent current, and 60μVRMS output noise-enabling stable power for noise-sensitive analog circuits in portable electronics.
For engineers reviewing the AP2127K-2.5TRG1 datasheet, AP2127K-2.5TRG1 pinout, AP2127K-2.5TRG1 application, or AP2127K-2.5TRG1 equivalent, key selection criteria include low-noise regulation under battery-voltage input (2.5–6V), fast soft-start (50μs), integrated shutdown with auto-discharge (60Ω RDS(ON)), and compatibility with 1μF ceramic input/output capacitors.
Technical Context
The AP2127K-2.5TRG1 uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (68dB @ 1kHz). Its internal 0.8V reference feeds a precision error amplifier that maintains tight line/load regulation (<5mV) across –40°C to +85°C ambient.
It integrates active shutdown control with logic-level compatible enable input (VIL ≤ 0.5V, VIH ≥ 1.5V), thermal shutdown (+165°C), short-circuit current limiting (50mA), and an internal discharge MOSFET-eliminating external bleed resistors in power sequencing designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% - ensures stable biasing for ADC references and RF front-end ICs without external feedback. |
| Max Output Current | 300mA - supports single-rail powering of microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Dropout Voltage | 170mV @ 300mA - enables operation down to VIN = 2.67V, extending battery runtime in 3V systems. |
| PSRR | 68dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 60μVRMS @ 10Hz–100kHz - meets stringent noise requirements for precision op-amps and PLL VCO supplies. |
| Quiescent Current | 60μA typical - minimizes standby power loss in always-on IoT sensor nodes and real-time clock circuits. |
| Shutdown Current | 0.1μA - enables deep-sleep modes with negligible battery drain over months of storage. |
Pinout & Package
SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body with exposed thermal pad (connected to GND for optimal thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Accepts 2.5V–6V input; requires 1μF ceramic decoupling capacitor placed adjacent to pin for stability. |
| GND | Ground Reference | Common return path for input/output currents and internal circuitry; must be connected to thermal pad. |
| VOUT | Regulated Output | Delivers 2.5V ±2% to load; stable with ≥1μF X7R/X5R ceramic capacitor directly at pin. |
| Shutdown | Enable Control Input | Active-high logic input (VIH ≥ 1.5V); pulls VOUT to GND via 60Ω internal MOSFET when low. |
| NC/ADJ | No Connection (Fixed Version) | Not bonded internally on AP2127K-2.5TRG1; must be left floating or tied to GND per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Noise Regulation | 60μVRMS output noise enables clean supply for RF transceivers and high-resolution ADCs. |
| Fast Soft-Start | 50μs ramp time prevents inrush current and output overshoot during power-up sequencing. |
| Auto-Discharge Function | 60Ω RDS(ON) discharge path clears VOUT capacitance within milliseconds after shutdown assertion. |
| Ceramic Capacitor Compatible | Stable with 1μF input/output MLCCs-reduces BOM count and PCB area vs. tantalum alternatives. |
| Thermal Protection | +165°C junction shutdown with +30°C hysteresis prevents latch-up during sustained overload conditions. |
Applications
| Wireless Sensor Node | USB-Powered Peripheral |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via BLE or Zigbee. IC Role / Device Role / Timing Role: Primary 2.5V supply for MCU, radio IC, and analog sensor front-end. Use Value: Low 60μA quiescent current extends 2xAA battery life beyond 2 years; 60μVRMS noise prevents ADC quantization errors. |
Use Scenario: USB audio adapter with DAC, headphone amp, and USB interface IC. IC Role / Device Role / Timing Role: Clean 2.5V rail for DAC reference and analog signal chain. Use Value: 68dB PSRR rejects USB host switching noise; ±2% accuracy ensures consistent DAC full-scale output. |
| Industrial PLC I/O Module | Medical Wearable |
Use Scenario: DIN-rail mounted I/O module converting 24V bus to isolated 3.3V/2.5V logic rails. IC Role / Device Role / Timing Role: Post-regulator for noise-sensitive analog input conditioning circuitry. Use Value: 170mV dropout allows operation from intermediate 3.3V rail; thermal shutdown protects against field wiring faults. |
Use Scenario: ECG patch with ultra-low-power MCU, analog front-end, and Bluetooth LE radio. IC Role / Device Role / Timing Role: Dedicated 2.5V supply for precision instrumentation amplifier and ADC. Use Value: 60μVRMS noise preserves microvolt-level biopotential signal integrity; 0.1μA shutdown current enables multi-month standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250mA max output, 175mV dropout @ 250mA, 1.6μA quiescent current, no shutdown pin. | Lacks enable/shutdown and auto-discharge; suitable only for always-on, lower-current roles. | Select when ultra-low IQ dominates over programmable enable and discharge functionality. |
| Torex XC6206P252MR-G | 300mA output, 200mV dropout @ 300mA, 1.0μA IQ, SOT-23-3 package (3-pin, no shutdown). | Non-shutdown variant in smaller 3-pin package; no thermal protection or short-circuit limit. | Choose for cost-sensitive, space-constrained designs where enable control and fault protection are omitted. |
Compared with MCP1700T-2502E/TT and XC6206P252MR-G, the AP2127K-2.5TRG1 uniquely combines 300mA drive, 60μA IQ, integrated shutdown with auto-discharge, and ±2% accuracy in a thermally enhanced SOT-23-5-making it optimal for battery-powered systems requiring both low noise and robust power sequencing.
Availability
AP2127K-2.5TRG1 is available at Aetrix Electronics and suitable for wireless sensor nodes, USB peripherals, industrial I/O modules, and medical wearables requiring stable component supply with guaranteed long-term sourcing.
Supply support for AP2127K-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP2127 series belongs to Diodes' high-performance LDO portfolio, designed specifically for battery-powered and noise-sensitive applications demanding ultra-low noise, fast transient response, and minimal quiescent current.
FAQ
What is the minimum input voltage required for AP2127K-2.5TRG1 to regulate at full 300mA load?
The minimum input voltage is calculated as VOUT + VDROP = 2.5V + 0.17V = 2.67V. At 2.67V input, the device sustains 2.5V output at 300mA across –40°C to +85°C ambient. Below this, dropout occurs and output voltage drops linearly with input.
Can AP2127K-2.5TRG1 be used with a 10μF output capacitor?
Yes-while 1μF is the minimum stable value, larger ceramic capacitors (e.g., 10μF X7R) improve transient response and reduce output ripple. The device remains stable up to 100μF; avoid tantalum or aluminum electrolytics due to ESR-related instability risks.
Does the NC/ADJ pin require any external connection on the AP2127K-2.5TRG1?
No. The NC/ADJ pin is unconnected internally on fixed-output versions like AP2127K-2.5TRG1. It may be left floating, but best practice recommends tying it to GND via a short trace to minimize noise coupling and ensure mechanical robustness.
How does the auto-discharge function behave during shutdown?
When the Shutdown pin is driven low, the internal 60Ω MOSFET connects VOUT to GND, discharging output capacitance with τ ≈ R×C. For a 10μF capacitor, discharge time to 10% residual voltage is ~1.4ms-enabling rapid power-state transitions in sequenced systems.
AP2127K-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):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 68dB ~ 54dB (100Hz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP2127K-2.5TRG1 FAQ
1.How can I place an order for AP2127K-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127K-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 AP2127K-2.5TRG1 reliable?
The price and inventory of AP2127K-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 AP2127K-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127K-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127K-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127K-2.5TRG1?
AP2127K-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127K-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 AP2127K-2.5TRG1?
For technical support, including AP2127K-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127K-2.5TRG1 requirements.
6.How does Aetrix verify that AP2127K-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127K-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 AP2127K-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127K-2.5TRG1?
All AP2127K-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127K-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 AP2127K-2.5TRG1 part is unused and in its original packaging.
Return procedure for AP2127K-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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