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Diodes Incorporated AP2125KS-3.0TRG1
- Part No.:
- AP2125KS-3.0TRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
AP2125KS-3.0TRG1.pdf
- Description:
- IC REG LINEAR 3V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
AP2125KS-3.0TRG1 from Diodes Incorporated is a 300mA, fixed-output 3.0V CMOS low-dropout (LDO) regulator in SC-70-5 package, featuring 65mV dropout at 100mA, ±2% output voltage accuracy, 50µVrms output noise, and 0.01µA standby current. It integrates over-temperature shutdown and current limiting, and is optimized for battery-powered portable electronics requiring stable, ultra-low-noise supply rails.
For engineers reviewing the AP2125KS-3.0TRG1 datasheet, AP2125KS-3.0TRG1 pinout, AP2125KS-3.0TRG1 application, or AP2125KS-3.0TRG1 equivalent, key selection criteria include dropout performance under 100mA load, RMS noise budget below 60µV, enable-input logic thresholds (1.5V high / 0.4V low), thermal shutdown at +160°C, and compatibility with 1µF ceramic output capacitors without ESR requirements.
Technical Context
The AP2125KS-3.0TRG1 employs a CMOS-based error amplifier with internal voltage reference and resistor network to regulate output precisely at 3.0V. Its architecture includes active current limiting (50mA short-circuit limit), thermal foldback via OTSD circuitry triggered at +160°C with +25°C hysteresis, and an active-high CE pin enabling full shutdown with sub-10nA leakage.
Designed for minimal external components, it operates with input voltages from 3.5V to 6.0V (VIN ≥ VOUT + 0.5V), supports 1µF input/output ceramic capacitors, and maintains ±100ppm/°C temperature coefficient across –40°C to +85°C ambient range while delivering up to 300mA continuous output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2% - ensures stable rail for 3.0V logic, ADC references, or RF front-end biasing without external feedback. |
| Max Output Current | 300mA minimum - sufficient to power microcontrollers, sensors, or wireless transceivers in compact portable systems. |
| Dropout Voltage | 65mV at 100mA - enables operation from single-cell Li-ion (3.0–4.2V) or two-cell alkaline (3.0V nominal) with minimal headroom loss. |
| RMS Output Noise | 50µVrms (10Hz–100kHz) - critical for noise-sensitive analog circuits like audio codecs or precision ADCs. |
| PSRR | 65dB at 1kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Quiescent Current | 60µA typical - extends battery life in always-on monitoring or low-power sleep modes. |
| Standby Current | 0.01µA typical - reduces system leakage to negligible levels during deep-sleep or shutdown states. |
| Enable Threshold | CE "High" ≥1.5V, "Low" ≤0.4V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
AP2125KS-3.0TRG1 is housed in a 5-pin SC-70-5 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. Pin assignments are validated per Diodes DS38144 Rev. 2–2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.5V–6.0V; requires 1µF ceramic decoupling close to pin. |
| 2 | GND | Analog/digital ground reference; must be low-impedance and directly connected to PCB ground plane. |
| 3 | NC | No internal connection; left unconnected; no routing or soldering required. |
| 4 | CE | Active-high enable control; drives into shutdown state when <0.4V; draws <1µA in disabled mode. |
| 5 | VOUT | Regulated 3.0V output; stable with 1µF ceramic capacitor; supports auto-discharge path when CE is deasserted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 50µVrms output noise enables clean power for RF ICs and high-resolution data converters. |
| Sub-100mV dropout at 100mA | 65mV dropout preserves >97% of input voltage efficiency-critical for extending runtime in Li-ion systems. |
| 0.01µA standby current | Enables multi-year battery life in IoT endpoint devices operating in extended sleep cycles. |
| Thermal shutdown with hysteresis | +160°C trip point with +25°C hysteresis prevents thermal runaway while allowing safe recovery after cooling. |
| Ceramic capacitor compatibility | Stable with 1µF X5R/X7R ceramics-eliminates need for costly tantalum or aluminum electrolytics. |
| ±2% output accuracy | Guarantees reliable operation of 3.0V I/O interfaces, memory, and mixed-signal peripherals across temperature. |
Applications
| Smartphone Baseband Power | Wearable Sensor Hub |
|---|---|
Use Scenario: Powers baseband processor core and RF transceiver sections in GSM/CDMA handsets where supply ripple directly impacts signal integrity and EVM. IC Role / Device Role / Timing Role: Primary 3.0V LDO delivering regulated, low-noise bias to analog front-end and digital logic blocks. Use Value: 65dB PSRR at 1kHz and 50µVrms noise prevent switching artifacts from PMIC DC-DC stages from corrupting RF receive sensitivity. |
Use Scenario: Supplies accelerometer, gyroscope, and BLE SoC in fitness trackers with strict size and battery-life constraints. IC Role / Device Role / Timing Role: Always-on 3.0V regulator managing sensor bias and low-power MCU domains during motion-triggered wake-up. Use Value: 0.01µA standby current and SC-70-5 footprint minimize quiescent drain and PCB area-enabling coin-cell operation for >12 months. |
| Industrial Handheld Meter | Medical Point-of-Care Monitor |
Use Scenario: Provides precision 3.0V rail to 16-bit SAR ADC and op-amp signal chain in portable multimeters and clamp meters. IC Role / Device Role / Timing Role: Low-drift, low-noise analog supply regulator ensuring measurement repeatability and offset stability. Use Value: ±2% output accuracy and ±100ppm/°C tempco maintain absolute voltage reference integrity across –10°C to +50°C field operating range. |
Use Scenario: Powers ECG front-end ASIC and display controller in battery-operated patient monitors requiring clinical-grade signal fidelity. IC Role / Device Role / Timing Role: Isolated 3.0V LDO decoupling sensitive analog acquisition path from noisy digital subsystems. Use Value: 50µVrms noise floor and 65mV dropout allow direct use of partially discharged Li-ion cells while preserving ECG baseline stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/TT | 250mA max output, 175mV dropout at 250mA, 30µVrms noise, SOT-23-3 package | Lacks enable pin and thermal shutdown; lower current capacity limits use in higher-load peripherals | Select when board space is constrained to 3-pin layout and enable control is handled externally. |
| Torex XC6206P302MR-G | 300mA output, 150mV dropout at 100mA, 40µVrms noise, SOT-23-5 package, no CE pin | Fixed-on operation only; no shutdown capability; slightly higher dropout reduces usable input range | Choose when system-level enable is unnecessary and lowest possible noise is prioritized over controllability. |
Compared with MCP1700T-3002E/TT and XC6206P302MR-G, AP2125KS-3.0TRG1 uniquely combines 300mA drive, sub-100mV dropout, integrated CE control, and thermal protection in the smallest SC-70-5 footprint-making it optimal for space- and safety-critical portable designs requiring both performance and functional safety features.
Availability
AP2125KS-3.0TRG1 is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, industrial handheld meters, and medical point-of-care monitors requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AP2125KS-3.0TRG1 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 company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP2125 series belongs to Diodes' high-performance LDO portfolio, engineered specifically for ultra-low-noise, high-accuracy regulation in battery-powered portable electronics where efficiency, size, and reliability are non-negotiable.
FAQ
What is the minimum input voltage required for AP2125KS-3.0TRG1 to maintain regulation?
The AP2125KS-3.0TRG1 requires VIN ≥ VOUT + 0.5V = 3.5V to guarantee regulation across its full operating temperature range (–40°C to +85°C). At 25°C, it can regulate down to ~3.05V due to lower dropout, but design margin mandates 3.5V minimum per datasheet recommendations.
Can AP2125KS-3.0TRG1 be used with a 10µF ceramic output capacitor?
Yes-AP2125KS-3.0TRG1 is stable with ceramic capacitors ranging from 1µF to 10µF. Larger values improve transient response and reduce output ripple, but do not affect stability. The device's internal compensation eliminates ESR requirements, unlike older bipolar LDOs.
Does the NC pin (Pin 3) require any PCB layout consideration?
No. Pin 3 is internally unconnected and must remain floating-no trace, pad, or solder mask opening is needed. Avoid routing signals or placing vias beneath this pin to prevent unintended coupling or mechanical stress on the SC-70-5 package.
How does thermal shutdown behave during sustained overload conditions?
When junction temperature reaches +160°C, AP2125KS-3.0TRG1 shuts down output and holds VOUT at 0V until temperature drops by +25°C hysteresis (to ~+135°C), then resumes regulation. This cycle prevents permanent damage while allowing automatic recovery once thermal load decreases.
AP2125KS-3.0TRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (100Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
AP2125KS-3.0TRG1 FAQ
1.How can I place an order for AP2125KS-3.0TRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2125KS-3.0TRG1 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 AP2125KS-3.0TRG1 reliable?
The price and inventory of AP2125KS-3.0TRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2125KS-3.0TRG1 is usually 5 days.
3.What payment methods are accepted for AP2125KS-3.0TRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2125KS-3.0TRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2125KS-3.0TRG1?
AP2125KS-3.0TRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2125KS-3.0TRG1 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 AP2125KS-3.0TRG1?
For technical support, including AP2125KS-3.0TRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2125KS-3.0TRG1 requirements.
6.How does Aetrix verify that AP2125KS-3.0TRG1 is sourced from the original manufacturer or authorized distributors?
All AP2125KS-3.0TRG1 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 AP2125KS-3.0TRG1 meets industry standards.
7.What is the process for return or replacement of AP2125KS-3.0TRG1?
All AP2125KS-3.0TRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2125KS-3.0TRG1, 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 AP2125KS-3.0TRG1 part is unused and in its original packaging.
Return procedure for AP2125KS-3.0TRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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