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Diodes Incorporated AP2127N-2.5TRG1
- Part No.:
- AP2127N-2.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2127N-2.5TRG1.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
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Product details
Overview
AP2127N-2.5TRG1 from Diodes Incorporated is a 300mA, 2.5V fixed-output CMOS low-dropout (LDO) regulator in SOT-23-3 package, featuring ±2% output voltage accuracy, 170mV dropout at 300mA, 60μA typical quiescent current, and 68dB PSRR at 1kHz-designed for stable power delivery in space-constrained battery-powered systems such as notebook motherboard core rails.
For engineers reviewing the AP2127N-2.5TRG1 datasheet, AP2127N-2.5TRG1 pinout, AP2127N-2.5TRG1 application, or AP2127N-2.5TRG1 equivalent, key selection criteria include dropout performance under 300mA load, low-noise operation (<60μVRMS), thermal shutdown behavior (+165°C), compatibility with 1μF ceramic input/output capacitors, and shutdown-enabled auto-discharge functionality.
Technical Context
The AP2127N-2.5TRG1 employs a PMOS pass transistor architecture enabling ultra-low dropout and fast transient response. Its internal 0.8V reference feeds a precision error amplifier that regulates output against line, load, and temperature variations across –40°C to +85°C ambient range.
It integrates active shutdown control with 0.1μA standby current, thermal foldback protection triggering at +165°C with +30°C hysteresis, and short-circuit current limiting to 50mA-ensuring robust operation without external protection circuitry in portable electronics power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% - ensures stable logic supply for 2.5V I/O domains without external feedback components. |
| Max Output Current | 300mA continuous - supports moderate-power microcontrollers, sensors, and interface ICs in compact designs. |
| Dropout Voltage | 170mV @ 300mA - enables regulation from 2.67V input, critical for single-cell Li-ion or dual-cell alkaline applications. |
| PSRR | 68dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Quiescent Current | 60μA typical - minimizes battery drain during system sleep modes in always-on subsystems. |
| Output Noise | 60μVRMS (10Hz–100kHz) - preserves signal integrity in analog front-ends and RF bias rails. |
| Shutdown Current | 0.1μA - enables deep power-down states with negligible leakage in battery-backed circuits. |
Pinout & Package
SOT-23-3 package: 3-pin surface-mount plastic case with exposed pad (not electrically connected), footprint compatible with JEDEC TO-236AB standard; thermal resistance θJA = 250°C/W (no copper pour).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Primary return path for load current and internal bias; must connect to low-impedance PCB ground plane. |
| 2 (VIN) | Input Power Supply | Accepts 2.5V–6V input; requires 1μF ceramic decoupling capacitor placed adjacent to pin. |
| 3 (VOUT) | Regulated Output | Delivers 2.5V ±2% at up to 300mA; supports 1μF ceramic output capacitor for stability across full temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| Low-ESR capacitor support | Stable with ≥1μF X5R/X7R MLCC on input and output-eliminates need for tantalum or electrolytic capacitors. |
| Soft-start time | 50μs-limits inrush current during power-up, preventing input rail sag in multi-rail systems. |
| Auto-discharge MOSFET | RDS(ON) = 60Ω between VOUT and GND during shutdown-discharges output capacitance within milliseconds. |
| Thermal protection | Active shutdown at +165°C with +30°C hysteresis-prevents permanent damage during sustained overload or poor heatsinking. |
| Line/load regulation | ≤5mV line change, ≤10mV load change-maintains tight voltage tolerance across dynamic operating conditions. |
Applications
| Mobile SSD Power Rail | Notebook Memory Subsystem |
|---|---|
|
Use Scenario: Supplies clean 2.5V to NAND flash controller and DRAM interface in M.2 SSD modules. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, tightly regulated voltage after buck converter stage. Use Value: 60μVRMS noise prevents bit errors during high-speed NAND read/write; 170mV dropout extends usable battery life by enabling operation down to 2.67V input. |
Use Scenario: Powers DDR3L memory termination voltage (VTT) and auxiliary logic on ultrabook motherboards. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring voltage stability during rapid memory access bursts. Use Value: 68dB PSRR at 1kHz rejects noise from CPU VRM switching; 50μs soft-start avoids timing violations during memory initialization sequences. |
| Industrial Sensor Node | USB-C Peripheral Hub |
|
Use Scenario: Provides 2.5V bias to precision ADCs and analog front-ends in battery-operated wireless sensor transmitters. IC Role / Device Role / Timing Role: Low-quiescent-current LDO enabling multi-year battery life while maintaining analog measurement accuracy. Use Value: 60μA IQ minimizes standby drain; ±2% accuracy ensures consistent ADC reference scaling across temperature without calibration. |
Use Scenario: Generates 2.5V for USB-C configuration channel (CC) logic and PD communication PHY in portable docking stations. IC Role / Device Role / Timing Role: Shutdown-controlled auxiliary rail activated only during USB enumeration and policy negotiation. Use Value: 0.1μA shutdown current eliminates parasitic drain when hub is disconnected; auto-discharge clears VOUT before reconnection to prevent bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 250mA max output, 190mV dropout @ 250mA, 2μA IQ - lower current, higher dropout, ultra-low IQ. | Limited to sub-250mA loads; better suited for micropower sensor nodes than memory rails. | Select when standby current dominates design priority over output current capability. |
| Torex XC6206P252MR-G | 300mA max output, 200mV dropout @ 300mA, 1.5μA IQ - slightly higher dropout, lower IQ than AP2127N-2.5TRG1. | Requires larger input headroom; lacks integrated auto-discharge MOSFET. | Choose when minimal quiescent draw is essential and external discharge circuitry is acceptable. |
Compared with MCP1700T-2502E/MB and XC6206P252MR-G, the AP2127N-2.5TRG1 uniquely balances 300mA drive, 170mV dropout, and integrated auto-discharge-making it optimal for applications requiring both performance headroom and controlled power sequencing without added components.
Availability
AP2127N-2.5TRG1 is available at Aetrix Electronics and suitable for notebook motherboard power rails, mobile SSDs, industrial sensor nodes, and USB-C peripheral hubs requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP2127N-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, engineered specifically for battery-powered portable electronics demanding low noise, low dropout, and ultra-low quiescent current in miniature packages.
FAQ
What is the minimum input voltage required for AP2127N-2.5TRG1 to maintain regulation?
The AP2127N-2.5TRG1 requires VIN ≥ VOUT + VDROP. With a typical dropout of 170mV at 300mA, the minimum functional input is 2.67V. At lighter loads, dropout decreases-e.g., ~60mV at 10mA-allowing operation down to 2.56V while maintaining 2.5V output accuracy within ±2%.
Can AP2127N-2.5TRG1 be used with ceramic capacitors smaller than 1μF?
No. The datasheet specifies stability with ≥1μF X5R/X7R ceramic capacitors on both input and output. Using smaller values risks oscillation due to insufficient phase margin, especially under load transients. The 1μF minimum is validated across –40°C to +85°C and applies to all operating conditions.
Does AP2127N-2.5TRG1 require an external pull-up on the shutdown pin?
No. The shutdown pin is internally pulled down. Driving it high (>1.5V) enables the regulator; leaving it open or grounded disables it. No external resistor is needed-this simplifies PCB layout and reduces BOM count in space-constrained designs.
How does the auto-discharge function behave during shutdown?
When the shutdown pin is driven low, an internal 60Ω NMOS switch connects VOUT to GND, discharging output capacitance with τ ≈ R × C. For a typical 10μF output cap, discharge time to <10% VOUT is under 1ms-enabling safe hot-plug operation and preventing backfeed into upstream supplies during power cycling.
AP2127N-2.5TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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-23-3
AP2127N-2.5TRG1 FAQ
1.How can I place an order for AP2127N-2.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127N-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 AP2127N-2.5TRG1 reliable?
The price and inventory of AP2127N-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 AP2127N-2.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127N-2.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127N-2.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127N-2.5TRG1?
AP2127N-2.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127N-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 AP2127N-2.5TRG1?
For technical support, including AP2127N-2.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127N-2.5TRG1 requirements.
6.How does Aetrix verify that AP2127N-2.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127N-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 AP2127N-2.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127N-2.5TRG1?
All AP2127N-2.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127N-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 AP2127N-2.5TRG1 part is unused and in its original packaging.
Return procedure for AP2127N-2.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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