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Diodes Incorporated AP2127N-3.3TRG1
- Part No.:
- AP2127N-3.3TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2127N-3.3TRG1.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:15,674
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Product details
Overview
AP2127N-3.3TRG1 from Diodes Incorporated is a 300mA, 3.3V fixed-output CMOS low-dropout (LDO) regulator in SOT-23 package, featuring 170mV dropout at full load, ±2% output voltage accuracy, and 60μVRMS output noise. It delivers stable power to noise-sensitive analog circuits and microcontrollers in space-constrained portable electronics.
For engineers reviewing the AP2127N-3.3TRG1 datasheet, AP2127N-3.3TRG1 pinout, AP2127N-3.3TRG1 application, or AP2127N-3.3TRG1 equivalent, key selection criteria include dropout performance at 300mA, 68dB PSRR at 1kHz, 0.1μA shutdown current, compatibility with 1μF ceramic capacitors, and thermal protection for battery-powered systems.
Technical Context
The AP2127N-3.3TRG1 uses a PMOS pass transistor architecture enabling ultra-low dropout (170mV @ 300mA) and near-zero quiescent current in shutdown mode (0.1μA). Its internal 0.8V reference and precision trimming ensure ±2% output accuracy across -40°C to +85°C.
It integrates soft-start (50μs), over-temperature shutdown (+165°C), short-circuit current limiting (50mA), and an auto-discharge MOSFET (RDS(ON) = 60Ω) tied to the SHUTDOWN pin-enabling rapid VOUT discharge during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures reliable logic-level supply for 3.3V microcontrollers and interfaces without external feedback. |
| Max Output Current | 300mA continuous - supports moderate-power peripherals like sensors, RF modules, and small displays. |
| Dropout Voltage | 170mV @ 300mA - enables operation from 3.47V input, ideal for single-cell Li-ion (3.0–4.2V) or 5V rail post-regulation. |
| PSRR | 68dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog signal chains. |
| Output Noise | 60μVRMS - meets low-noise requirements for ADC references, audio codecs, and precision op-amp supplies. |
| Quiescent Current | 60μA typical - extends battery life in always-on monitoring applications such as IoT endpoints and wearables. |
| Shutdown Current | 0.1μA - enables deep-sleep modes with minimal leakage, critical for multi-year battery operation. |
Pinout & Package
SOT-23 package (3-pin, surface-mount) with 1.3mm × 2.9mm footprint and exposed thermal pad (not electrically connected in this variant); optimized for compact PCB layouts and low thermal resistance (θJA = 180°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Power Input | Accepts 2.5V–6V input; requires local 1μF ceramic decoupling to suppress high-frequency noise and ensure stability. |
| VOUT (Pin 2) | Regulated Output | Delivers fixed 3.3V; connects directly to load; must be bypassed with ≥1μF X7R/X5R MLCC placed adjacent to pin. |
| GND (Pin 1) | Ground Reference | Common return path for input/output capacitors and load; requires low-impedance PCB plane connection for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60μVRMS output noise enables clean power for ADCs, PLLs, and RF receivers without additional filtering. |
| Ultra-low shutdown current | 0.1μA standby draw allows integration into energy-harvesting and coin-cell-powered systems with multi-year shelf life. |
| Ceramic capacitor compatibility | Stable with ≥1μF X7R/X5R MLCC on both input and output-eliminates need for costly tantalum or electrolytic capacitors. |
| Integrated auto-discharge | 60Ω internal MOSFET discharges output capacitance rapidly upon shutdown-prevents residual voltage from interfering with system reset sequencing. |
| Thermal and short-circuit protection | +165°C junction shutdown with +30°C hysteresis and 50mA short-limit prevent damage during fault conditions without external circuitry. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Powering low-power ECG front-end amplifiers and 16-bit SAR ADCs in handheld patient monitors. IC Role / Device Role / Timing Role: Provides ultra-low-noise 3.3V bias for analog signal chain, rejecting switching noise from shared DC/DC converter. Use Value: 60μVRMS noise and 68dB PSRR at 1kHz preserve signal integrity, enabling <10μV baseline resolution in biopotential measurement. |
Use Scenario: Supplying isolated digital I/O drivers and CAN transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Delivers stable 3.3V to interface ICs under wide-input industrial 12–24V supply variations and load transients. Use Value: 170mV dropout and ±2% accuracy maintain logic-high margin across temperature, ensuring robust UART/CAN communication up to +85°C. |
| Wearable Fitness Trackers | Smart Home Hub Processors |
|
Use Scenario: Regulating power to ARM Cortex-M0+ MCU and MEMS accelerometer in wrist-worn devices. IC Role / Device Role / Timing Role: Supplies core logic voltage while supporting dynamic sleep/wake cycles via SHUTDOWN pin control. Use Value: 0.1μA shutdown current and 50μs soft-start minimize wake-up latency and extend coin-cell battery life beyond 12 months. |
Use Scenario: Providing clean 3.3V to Wi-Fi SoC and audio codec in voice-controlled smart speakers. IC Role / Device Role / Timing Role: Acts as post-regulator downstream of buck converter to reduce ripple-induced audio artifacts. Use Value: 54dB PSRR at 10kHz attenuates high-frequency switching noise, eliminating audible buzz in Class-D amplifier outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/TT | 250mA max output, 175mV dropout @ 250mA, 65dB PSRR @ 1kHz, no auto-discharge MOSFET | Lacks integrated VOUT discharge; requires external resistor for fast discharge in reset-critical designs | Preferred when cost sensitivity outweighs need for auto-discharge and higher current capability is unnecessary |
| TPS7A2033PDQNR | 300mA, 130mV dropout @ 300mA, 40μVRMS noise, 85dB PSRR @ 100kHz, 1.5μA quiescent current | Higher PSRR bandwidth and lower noise but 15× higher quiescent current in active mode | Selected when ultra-low noise and high-frequency ripple rejection are prioritized over battery runtime |
Compared with MCP1700T-3302E/TT, AP2127N-3.3TRG1 offers 50mA higher current headroom and integrated discharge; versus TPS7A2033PDQNR, it trades 25dB PSRR above 10kHz for 25× lower quiescent current-making it optimal for long-life, moderate-noise applications.
Availability
AP2127N-3.3TRG1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wearable fitness trackers, and smart home hub processors requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for AP2127N-3.3TRG1 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 systems where low dropout, ultra-low noise, and minimal quiescent current are essential.
FAQ
What is the minimum input voltage required for AP2127N-3.3TRG1 to maintain regulation?
The AP2127N-3.3TRG1 requires VIN ≥ VOUT + VDROP. With a typical dropout of 170mV at 300mA, the minimum functional input is 3.47V. At lighter loads (e.g., 10mA), dropout drops to ~60mV, allowing operation down to 3.36V. Absolute minimum VIN per datasheet is 2.5V, but regulation is not guaranteed below VOUT + VDROP.
Can AP2127N-3.3TRG1 be used with ceramic output capacitors smaller than 1μF?
No-Diodes specifies ≥1μF X7R or X5R MLCC for stability across temperature and load. Using smaller values risks oscillation or degraded transient response. The device is not characterized for stability with sub-1μF ceramics, and layout parasitics further reduce effective capacitance at high frequencies.
Does the SHUTDOWN pin require a pull-up resistor to operate correctly?
Yes-the SHUTDOWN pin is active-low and internally pulled down. To enable normal operation, it must be held high (≥1.5V) via external pull-up to VIN or a logic rail. Leaving it floating may cause erratic enable/disable behavior due to noise coupling; a 100kΩ pull-up to VIN is recommended for robustness.
How does the auto-discharge function behave during shutdown?
When SHUTDOWN is pulled low, the internal 60Ω MOSFET connects VOUT to GND, discharging output capacitance with τ ≈ R × C. For a typical 10μF output cap, discharge time to 10% residual voltage is ~1.4ms. This prevents back-powering of upstream circuitry and ensures deterministic reset timing in microcontroller-based systems.
AP2127N-3.3TRG1 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):
- 3.3V
- 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-3.3TRG1 FAQ
1.How can I place an order for AP2127N-3.3TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127N-3.3TRG1 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-3.3TRG1 reliable?
The price and inventory of AP2127N-3.3TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2127N-3.3TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127N-3.3TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127N-3.3TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127N-3.3TRG1?
AP2127N-3.3TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127N-3.3TRG1 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-3.3TRG1?
For technical support, including AP2127N-3.3TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127N-3.3TRG1 requirements.
6.How does Aetrix verify that AP2127N-3.3TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127N-3.3TRG1 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-3.3TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127N-3.3TRG1?
All AP2127N-3.3TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127N-3.3TRG1, 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-3.3TRG1 part is unused and in its original packaging.
Return procedure for AP2127N-3.3TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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