My Inquiry
My Account
Diodes Incorporated AP2127N-1.5TRG1
- Part No.:
- AP2127N-1.5TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP2127N-1.5TRG1.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP2127N-1.5TRG1 from Diodes Incorporated is a 300mA, 1.5V fixed-output CMOS low-dropout (LDO) regulator in SOT-23 package, delivering ±2% output voltage accuracy, 60μA typical quiescent current, and 68dB PSRR at 1kHz - optimized for noise-sensitive battery-powered applications including portable instrumentation and USB peripheral power rails.
For engineers reviewing the AP2127N-1.5TRG1 datasheet, AP2127N-1.5TRG1 pinout, AP2127N-1.5TRG1 application, or AP2127N-1.5TRG1 equivalent, key selection criteria include dropout voltage at 300mA (900mV), thermal shutdown threshold (+165°C), soft-start time (50μs), and compatibility with 1μF ceramic input/output capacitors.
Technical Context
The AP2127N-1.5TRG1 uses a PMOS pass transistor architecture enabling ultra-low dropout (900mV @ 300mA for VOUT = 1.5V) and high ripple rejection without requiring external compensation. Its internal 0.8V reference feeds a precision error amplifier that maintains regulation across -40°C to +85°C ambient.
Integrated features include active shutdown control with 0.1μA standby current, auto-discharge MOSFET (RDS(ON) = 60Ω), over-temperature protection, and short-circuit current limiting at 50mA - all implemented in a single-die CMOS process with no external components required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2% - ensures stable rail for 1.5V logic, low-voltage sensors, and RF biasing without external feedback. |
| Max Output Current | 300mA - supports moderate-power microcontrollers, display drivers, and analog front-ends in space-constrained designs. |
| Dropout Voltage | 900mV @ 300mA - enables operation from 2.4V input (e.g., single LiFePO₄ cell or dual alkaline) while maintaining regulation. |
| Quiescent Current | 60μA typical - minimizes battery drain in always-on monitoring circuits and IoT edge nodes. |
| 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 reference supplies and audio codec power domains. |
| Shutdown Current | 0.1μA - enables deep-sleep modes in portable devices with near-zero static power loss. |
Pinout & Package
SOT-23 package (3-pin, lead-free, RoHS-compliant) with exposed pad not present - thermal performance relies on PCB copper area under pins 1–3. Pin pitch: 0.95mm; body size: 2.9mm × 1.6mm × 1.1mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for load current and internal bias; must connect to low-impedance ground plane. |
| 2 (VOUT) | Regulated output | Delivers stable 1.5V to load; requires 1μF ceramic capacitor placed within 2mm of pin for stability. |
| 3 (VIN) | Input supply | Accepts 2.5V–6V input; decoupled by 1μF ceramic capacitor close to pin to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60μVRMS output noise enables clean power for 12-bit+ ADCs and RF synthesizers. |
| Fast soft-start | 50μs ramp prevents inrush current and output overshoot during power-up sequencing. |
| Ceramic capacitor compatible | Stable with ≥1μF X7R/X5R MLCCs on input and output - eliminates need for costly tantalum or electrolytic caps. |
| Auto-discharge on shutdown | 60Ω internal MOSFET discharges output capacitance rapidly, preventing residual voltage hold-up in safety-critical systems. |
| Thermal protection | +165°C shutdown with +30°C hysteresis prevents latch-up during sustained overload or poor heatsinking. |
Applications
| Portable Medical Sensors | USB-C Peripheral Power |
|---|---|
|
Use Scenario: Powering low-power biosignal amplifiers and analog front-ends in wearable ECG/SpO₂ monitors. IC Role / Device Role / Timing Role: Primary 1.5V analog supply rail regulator with ultra-low noise and tight voltage tolerance. Use Value: 60μVRMS noise prevents baseline drift in sub-mV physiological signals; ±2% accuracy ensures consistent ADC reference scaling. |
Use Scenario: Providing regulated 1.5V bias for USB-C CC logic and VCONN circuitry in dongles and adapters. IC Role / Device Role / Timing Role: Standby-capable LDO supplying always-on control logic independent of main system power state. Use Value: 0.1μA shutdown current extends battery life in unpowered USB accessories; 900mV dropout allows operation from degraded 2.4V VBUS. |
| Industrial IoT Edge Nodes | Low-Voltage FPGA I/O Banks |
|
Use Scenario: Powering LoRaWAN transceivers and sensor interface ICs in battery-operated remote telemetry units. IC Role / Device Role / Timing Role: Main 1.5V supply for RF SoC and digital logic, activated only during scheduled transmission windows. Use Value: 50μs soft-start synchronizes cleanly with MCU wake-up timing; 68dB PSRR rejects noise from RF power amplifier switching. |
Use Scenario: Supplying configurable I/O banks on Spartan-7 and iCE40UP FPGAs requiring precise 1.5V termination voltage. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for FPGA I/O VCCIO rail, decoupled from core logic supply. Use Value: ±2% output accuracy meets Xilinx/Lattice VCCIO tolerance specs; 1μF ceramic compatibility simplifies compact PCB layout. |
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, 6μA quiescent current, 600mV dropout @ 250mA - lower IQ but reduced current capability. | Preferred for ultra-low-power sensor nodes where <250mA load suffices and 6μA IQ is critical. | Select when battery life dominates over peak current demand; verify thermal derating at 300mA. |
| TPS7A0515PDBVR | 200mA max output, 25μA IQ, 170mV dropout @ 200mA - significantly lower dropout but lower current rating. | Better suited for single-cell Li-ion (3.0–3.6V input) applications needing minimal headroom. | Choose for higher-efficiency operation above 2.5V input; confirm 200mA limit aligns with worst-case FPGA I/O loading. |
Compared with MCP1700T-1502E/TT and TPS7A0515PDBVR, the AP2127N-1.5TRG1 uniquely balances 300mA drive, 60μA IQ, and 900mV dropout - making it optimal for mixed-signal loads demanding both current headroom and noise performance from 2.5V–6V inputs.
Availability
AP2127N-1.5TRG1 is available at Aetrix Electronics and suitable for portable medical sensors, USB-C peripheral power, industrial IoT edge nodes, and low-voltage FPGA I/O banks requiring stable component supply with full traceability and lifecycle support.
Supply support for AP2127N-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP2127 series belongs to Diodes' high-speed, low-noise LDO product line, designed specifically for battery-powered and noise-sensitive applications where precision regulation, fast transient response, and minimal board space are critical.
FAQ
What is the minimum input voltage required for AP2127N-1.5TRG1 to maintain regulation at 300mA?
The AP2127N-1.5TRG1 requires VIN ≥ 2.4V to sustain 1.5V output at 300mA load, based on its 900mV maximum dropout voltage specification (VOUT + VDROP = 1.5V + 0.9V). Operation below 2.4V results in unregulated output proportional to input voltage.
Can AP2127N-1.5TRG1 be used with ceramic capacitors smaller than 1μF?
No - the datasheet specifies stability only with ≥1μF X7R or X5R ceramic capacitors on both input and output. Using smaller values risks oscillation or poor transient response due to insufficient phase margin in the control loop.
Does AP2127N-1.5TRG1 include reverse polarity protection?
No - the device lacks integrated reverse-voltage protection. Applying negative voltage to VIN or VOUT may damage the IC. External protection diodes or MOSFET-based circuits are required if reverse input conditions are possible in the system.
How does the auto-discharge function behave during normal operation?
The 60Ω discharge MOSFET activates only when the shutdown pin is driven low; it remains fully off during normal operation. Output voltage remains regulated and unaffected by the discharge path unless explicitly commanded into shutdown mode.
AP2127N-1.5TRG1 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):
- 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
AP2127N-1.5TRG1 FAQ
1.How can I place an order for AP2127N-1.5TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2127N-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 AP2127N-1.5TRG1 reliable?
The price and inventory of AP2127N-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 AP2127N-1.5TRG1 is usually 5 days.
3.What payment methods are accepted for AP2127N-1.5TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2127N-1.5TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2127N-1.5TRG1?
AP2127N-1.5TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2127N-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 AP2127N-1.5TRG1?
For technical support, including AP2127N-1.5TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2127N-1.5TRG1 requirements.
6.How does Aetrix verify that AP2127N-1.5TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2127N-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 AP2127N-1.5TRG1 meets industry standards.
7.What is the process for return or replacement of AP2127N-1.5TRG1?
All AP2127N-1.5TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2127N-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 AP2127N-1.5TRG1 part is unused and in its original packaging.
Return procedure for AP2127N-1.5TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP2127N-1.5TRG1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
