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Diodes Incorporated AP2127N3-1.5TRG1
- Part No.:
- AP2127N3-1.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- 3-SMD, SOT23-3 Variant
- Datasheet:
-
AP2127N3-1.5TRG1.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,721
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Product details
Overview
AP2127N3-1.5TRG1 from Diodes Incorporated is a 300mA, 1.5V fixed-output CMOS low-dropout (LDO) regulator in SOT-23-3 package, featuring 170mV dropout at 300mA (for 3.3V version), ±2% output accuracy, 60μVRMS noise, and 68dB PSRR at 1kHz - designed for stable power delivery in space-constrained portable electronics.
For engineers reviewing the AP2127N3-1.5TRG1 datasheet, AP2127N3-1.5TRG1 pinout, AP2127N3-1.5TRG1 application, or AP2127N3-1.5TRG1 equivalent, key selection criteria include dropout voltage under load, thermal performance in SOT-23-3, shutdown-enabled auto-discharge capability, and compatibility with 1μF ceramic input/output capacitors.
Technical Context
The AP2127N3-1.5TRG1 integrates a PMOS pass transistor with internal 0.8V reference, enabling ultra-low quiescent current (60μA typical) and fast soft-start (50μs). Its shutdown logic accepts 1.5V high/0.5V low thresholds and activates an integrated 60Ω discharge MOSFET to rapidly deplete VOUT capacitance.
It operates across 2.5V–6V input range with guaranteed stability using only 1μF X5R/X7R MLCCs on both input and output, and includes over-temperature protection triggering at +165°C with +30°C hysteresis - critical for unattended battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% - ensures precise rail generation for 1.5V logic or analog circuitry without external feedback. |
| Max Output Current | 300mA continuous - supports moderate-power microcontrollers, sensors, and RF modules in compact designs. |
| Dropout Voltage | 900mV @ 300mA (for 1.5V version) - enables operation down to VIN = 2.4V while maintaining regulation. |
| PSRR | 68dB @ 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 60μVRMS (10Hz–100kHz) - preserves signal integrity in ADC references, audio codecs, and PLL power domains. |
| Quiescent Current | 60μA typical - extends battery life in always-on monitoring circuits and IoT endpoints. |
| Shutdown Current | 0.1μA - reduces system standby power to nanoampere levels when disabled. |
Pinout & Package
SOT-23-3 package: 1.4mm × 2.9mm × 1.1mm body, gull-wing leads, exposed pad not present - optimized for low-cost, high-density PCB layouts with minimal thermal mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference and thermal path - must connect directly to PCB ground plane for stability and thermal dissipation. |
| 2 | VIN | Input power supply (2.5V–6V) - requires local 1μF ceramic decoupling placed within 2mm of pin. |
| 3 | VOUT | Regulated 1.5V output - supports 1μF ceramic capacitor; integrates 60Ω discharge FET activated during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60μVRMS output noise enables clean power for precision analog front-ends and clock buffers. |
| Auto-discharge on shutdown | 60Ω internal MOSFET discharges output capacitance in <1ms - prevents residual voltage from interfering with system reset sequencing. |
| Ceramic capacitor compatibility | Stable with ≥1μF X5R/X7R MLCCs on input and output - eliminates need for costly tantalum or electrolytic capacitors. |
| Thermal protection | +165°C trip with +30°C hysteresis - prevents latch-up during sustained overload or poor heatsinking in sealed enclosures. |
| Soft-start | 50μs controlled ramp - avoids inrush current spikes that could destabilize shared input rails or trigger upstream current limits. |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.5V analog supply for instrumentation amplifier and 16-bit ADC. Use Value: 60μVRMS noise ensures <1 LSB noise floor at 16-bit resolution; 0.1μA shutdown current extends battery life to >2 years in sleep mode. |
Use Scenario: Wireless temperature/humidity sensor node operating in factory environments. IC Role / Device Role / Timing Role: Stable 1.5V rail for ultra-low-power MCU and digital sensor interface. Use Value: ±2% output accuracy maintains sensor calibration across -40°C to +85°C; 68dB PSRR rejects noise from nearby 2.4GHz RF transceivers. |
| USB-C Peripheral Hub | Smart Home Motion Detector |
Use Scenario: Compact USB-C dock supplying power to multiple low-voltage peripherals. IC Role / Device Role / Timing Role: Secondary LDO for 1.5V I²C bus termination and level-shifting logic. Use Value: 900mV dropout allows operation from 2.4V minimum input - compatible with buck converter outputs under light load. |
Use Scenario: Battery-powered PIR motion detector with wake-on-event capability. IC Role / Device Role / Timing Role: Always-on 1.5V supply for PIR signal conditioner and wake-up comparator. Use Value: 50μs soft-start prevents false triggers during power-up; thermal shutdown protects against enclosure overheating in summer conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 250mA max output, 175mV dropout @ 250mA, 1.5V fixed, SOT-23-3 - lower current rating and higher dropout than AP2127N3-1.5TRG1. | Limited to sub-250mA loads; less suitable for peak-current sensor bursts or multi-rail systems. | Select when cost sensitivity outweighs 50mA headroom and 170mV vs. 175mV dropout margin. |
| TPS70615DBVR | 150mA max output, 1.5V fixed, 170mV dropout @ 150mA, 30μVRMS noise - half the current capacity and lower noise than AP2127N3-1.5TRG1. | Not viable for 300mA pulse loads (e.g., BLE radio transmit); better for ultra-low-noise analog-only rails. | Choose only if system peak current remains ≤150mA and noise budget demands <30μVRMS. |
Compared with MCP1700T-1502E/TT and TPS70615DBVR, the AP2127N3-1.5TRG1 delivers 300mA continuous current with integrated auto-discharge and 60μVRMS noise - making it uniquely suited for battery-powered systems requiring both robust load handling and rapid power-state transitions.
Availability
AP2127N3-1.5TRG1 is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, USB-C peripheral hubs, and smart home motion detectors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP2127N3-1.5TRG1 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, with emphasis on power management, signal integrity, and connectivity products for industrial, computing, and consumer markets.
The AP2127 Series belongs to Diodes' high-performance LDO portfolio, engineered specifically for battery-powered devices demanding ultra-low noise, low quiescent current, and seamless integration with ceramic capacitors in space-constrained designs.
FAQ
What is the minimum input voltage required for AP2127N3-1.5TRG1 to maintain regulation at 300mA?
The AP2127N3-1.5TRG1 requires VIN ≥ 2.4V to sustain 1.5V output at 300mA, based on its 900mV dropout specification for the 1.5V version. Below this threshold, output voltage collapses linearly with input; operation below 2.5V is outside recommended conditions per datasheet Section 4.
Can AP2127N3-1.5TRG1 be used with a 0.47μF output capacitor?
No - the datasheet specifies minimum 1μF ceramic (X5R/X7R) for stable operation across temperature and load. Using 0.47μF risks oscillation, especially under transient load steps, due to insufficient phase margin; stability testing with smaller values is not characterized or guaranteed.
Does the shutdown pin require a pull-up resistor for reliable operation?
No external pull-up is needed. The shutdown pin has an internal 3MΩ pull-down resistor (per Electrical Characteristics table), ensuring default disable state. A logic-high signal ≥1.5V applied directly suffices to enable; no series resistor or external biasing is required for standard GPIO control.
How does the auto-discharge function behave during brief shutdown pulses?
The integrated 60Ω discharge MOSFET activates immediately upon shutdown assertion and remains active until VOUT drops below ~0.3V, typically discharging a 10μF output cap in <0.6ms. It deactivates automatically after discharge completion - no timing circuit or external control is needed.
AP2127N3-1.5TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SMD, SOT23-3 Variant
- 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1V @ 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
AP2127N3-1.5TRG1 FAQ
1.How can I place an order for AP2127N3-1.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127N3-1.5TRG1 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 AP2127N3-1.5TRG1 reliable?
The price and inventory of AP2127N3-1.5TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2127N3-1.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127N3-1.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127N3-1.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127N3-1.5TRG1?
AP2127N3-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127N3-1.5TRG1 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 AP2127N3-1.5TRG1?
For technical support, including AP2127N3-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127N3-1.5TRG1 requirements.
6.How does Aetrix verify that AP2127N3-1.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127N3-1.5TRG1 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 AP2127N3-1.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127N3-1.5TRG1?
All AP2127N3-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127N3-1.5TRG1, 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 AP2127N3-1.5TRG1 part is unused and in its original packaging.
Return procedure for AP2127N3-1.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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