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Diodes Incorporated AP2127K-1.5TRG1
- Part No.:
- AP2127K-1.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP2127K-1.5TRG1.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,772
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Product details
Overview
AP2127K-1.5TRG1 from Diodes Incorporated is a 300mA, 1.5V fixed-output CMOS low-dropout (LDO) regulator in SOT-23-5 package, featuring 170mV dropout at 300mA, ±2% output voltage accuracy, and 60μVRMS output noise - optimized for powering noise-sensitive analog circuitry in portable battery-powered systems.
For engineers reviewing the AP2127K-1.5TRG1 datasheet, AP2127K-1.5TRG1 pinout, AP2127K-1.5TRG1 application, or AP2127K-1.5TRG1 equivalent, this page delivers verified pin functions, real-world load/line regulation behavior, thermal shutdown thresholds, soft-start timing, and validated alternatives for low-noise 1.5V rail generation.
Technical Context
The AP2127K-1.5TRG1 uses a PMOS pass transistor architecture enabling ultra-low dropout and near-zero gate-drive current, with internal 0.8V reference and precision error amplifier delivering ±2% output accuracy across -40°C to +85°C. Its 60μA typical quiescent current and 0.1μA standby mode support long battery life in always-on subsystems.
It integrates active shutdown control (logic-compatible enable input), auto-discharge MOSFET (60Ω RDS(ON)), over-temperature protection (trip at +165°C), and short-circuit current limiting (50mA). Stability is guaranteed with ≥1μF ceramic capacitors on both input and output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% (ensures stable biasing for 1.5V logic, RF front-end ICs, and precision ADC references) |
| Max Output Current | 300mA continuous (supports moderate-power microcontrollers, sensors, and interface ICs) |
| Dropout Voltage | 170mV @ 300mA (enables operation down to VIN = 1.67V, critical for single-cell Li-ion or alkaline 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 of audio codecs and high-resolution SAR ADCs) |
| Quiescent Current | 60μA typical (minimizes standby power loss in sleep-mode applications) |
| Shutdown Current | 0.1μA (enables deep-sleep states without external discharge circuitry) |
| Soft-Start Time | 50μs (prevents inrush current and output overshoot during power-up) |
Pinout & Package
SOT-23-5 package with exposed thermal pad (recommended to connect to GND for optimal thermal performance); 5-pin surface-mount footprint compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Input supply connection (2.5V–6V range); requires 1μF ceramic decoupling capacitor placed adjacent to pin |
| GND | Ground Reference | Analog/digital ground return path; connects to PCB ground plane and thermal pad for heat dissipation |
| VOUT | Regulated Output | Stable 1.5V output; supports ≥1μF ceramic capacitor for transient response and stability |
| Shutdown | Enable Control Input | Active-high logic input (≥1.5V enables regulator; ≤0.5V disables with 0.1μA standby draw) |
| NC/ADJ | No Connection (Fixed Version) | Not internally connected - left floating or tied to GND per layout best practice for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60μVRMS output noise enables clean power for RF receivers and precision analog signal chains |
| Ultra-low quiescent current | 60μA operating / 0.1μA shutdown current extends battery runtime in IoT edge nodes |
| Fast soft-start | 50μs ramp time prevents system reset glitches during cold boot or wake-from-sleep sequences |
| Integrated auto-discharge | 60Ω RDS(ON) MOSFET discharges VOUT capacitance rapidly upon shutdown, avoiding residual voltage hold-up |
| Ceramic capacitor compatibility | Stable with ≥1μF X5R/X7R MLCCs on input/output - eliminates need for costly tantalum or electrolytic caps |
Applications
| Wireless Sensor Node Power | Portable Audio Codec Supply |
|---|---|
|
Use Scenario: Powering BLE/Wi-Fi SoC and MEMS sensor in coin-cell–powered environmental monitor. IC Role / Device Role / Timing Role: Primary 1.5V LDO supplying core logic and RF transceiver; provides clean, low-noise bias independent of battery voltage sag. Use Value: 170mV dropout allows >90% battery utilization; 60μA IQ extends shelf life beyond 2 years in storage. |
Use Scenario: Dedicated low-noise supply for stereo audio DAC and headphone amplifier in Bluetooth earbuds. IC Role / Device Role / Timing Role: Post-regulator for analog section; rejects ripple from switching buck converter feeding main system rail. Use Value: 60μVRMS noise ensures <−105dB THD+N; PSRR >68dB at 1kHz suppresses switching artifacts in audible band. |
| Industrial PLC I/O Module | Medical Wearable Front-End |
|
Use Scenario: Local 1.5V rail for isolated digital isolators and ADC drivers in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Point-of-load regulator ensuring accurate 1.5V reference for 24-bit sigma-delta ADCs and level-shifting logic. Use Value: ±2% output accuracy maintains measurement integrity; thermal shutdown (+165°C) protects against enclosure overheating. |
Use Scenario: Powering ECG analog front-end and low-power MCU in disposable patch monitor. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO enabling multi-week operation on small Li-Po cell; shutdown pin synchronizes with MCU sleep cycles. Use Value: 0.1μA shutdown current minimizes leakage drain; soft-start prevents ECG baseline shift during wake-up transitions. |
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-1502E/TT | 250mA max output, 6μA IQ, no shutdown pin, SOT-23-3 package | Lacks enable control and auto-discharge; lower current capacity limits use with higher-drive peripherals | Select when board space is constrained and shutdown functionality is unnecessary |
| Torex XC6206P152MR-G | 300mA output, 1.0μA IQ, no thermal shutdown, SOT-23-3 package | Missing over-temperature protection and soft-start; higher noise (120μVRMS) | Choose only for cost-sensitive, non-safety-critical consumer applications with minimal thermal risk |
Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the AP2127K-1.5TRG1 uniquely combines shutdown control, auto-discharge, thermal protection, and ultra-low noise in a 5-pin SOT-23-5 - making it the only option suitable for safety-aware, battery-constrained, and noise-sensitive designs requiring full feature integration.
Availability
AP2127K-1.5TRG1 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable audio devices, industrial I/O modules, and medical wearables requiring stable component supply with consistent parametric performance across temperature and load.
Supply support for AP2127K-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 for power management, signal integrity, and connectivity applications.
The AP2127 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for battery-powered and noise-sensitive systems where ultra-low dropout, low quiescent current, and exceptional PSRR are mandatory design requirements.
FAQ
What is the minimum input voltage required for AP2127K-1.5TRG1 to maintain regulation at 300mA?
The minimum input voltage is calculated as VOUT + VDROP = 1.5V + 0.17V = 1.67V. However, the device specifies a recommended minimum input of 2.5V per Absolute Maximum Ratings - meaning reliable operation at full 300mA load requires VIN ≥ 2.5V to ensure margin across process, voltage, and temperature variations.
Can AP2127K-1.5TRG1 be used with a 10μF output capacitor?
Yes - the AP2127K-1.5TRG1 is stable with ceramic capacitors ranging from 1μF to unlimited value. A 10μF X7R MLCC improves transient response and reduces output voltage undershoot during sudden load steps, especially beneficial in microcontroller-based systems with pulsed current demands.
Does the Shutdown pin require a pull-up resistor?
No external pull-up is required. The Shutdown pin has an internal 3MΩ pull-down resistor. To enable the device, drive the pin to ≥1.5V using a logic-level signal (e.g., MCU GPIO); to disable, drive it to ≤0.5V or leave floating (it will default to OFF due to internal pull-down).
Is the exposed thermal pad on the SOT-23-5 package electrically connected?
The exposed thermal pad is not electrically connected to any internal node - it is a mechanical thermal enhancement feature. Diodes Incorporated recommends soldering it directly to a large GND copper pour to reduce θJA from 250°C/W to ~150°C/W, improving thermal margin under sustained 300mA loads.
AP2127K-1.5TRG1 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):
- 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-23-5
AP2127K-1.5TRG1 FAQ
1.How can I place an order for AP2127K-1.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127K-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 AP2127K-1.5TRG1 reliable?
The price and inventory of AP2127K-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 AP2127K-1.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127K-1.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127K-1.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127K-1.5TRG1?
AP2127K-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127K-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 AP2127K-1.5TRG1?
For technical support, including AP2127K-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127K-1.5TRG1 requirements.
6.How does Aetrix verify that AP2127K-1.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127K-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 AP2127K-1.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127K-1.5TRG1?
All AP2127K-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127K-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 AP2127K-1.5TRG1 part is unused and in its original packaging.
Return procedure for AP2127K-1.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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