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onsemi NCP103AMX280TCG
- Part No.:
- NCP103AMX280TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP103AMX280TCG.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
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Product details
Overview
NCP103AMX280TCG from onsemi is a 150 mA CMOS low-dropout linear regulator with fixed 2.8 V output, active output discharge function, ±1% output voltage accuracy at room temperature, 75 mV typical dropout at 150 mA, and stable operation with only 1 µF ceramic output capacitor. It serves as a precision, low-noise power supply for noise-sensitive battery-powered systems such as GPS modules and Bluetooth transceivers.
For engineers reviewing the NCP103AMX280TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low quiescent current (50 µA typ.), high PSRR (75 dB at 1 kHz), thermal shutdown protection, and uDFN4 1.0×1.0 mm package compatibility with space-constrained portable designs.
Technical Context
The NCP103AMX280TCG integrates a PMOS pass transistor with dynamic quiescent current adjustment to minimize IQ across load conditions, enabling extended battery life in always-on subsystems. Its internal bandgap reference and error amplifier deliver tight regulation under varying line and load conditions.
Unlike standard LDOs, this variant includes an active output discharge transistor (RDIS = 100 Ω typ.) activated during shutdown, ensuring rapid VOUT decay to prevent unintended biasing of downstream circuitry - a critical feature for multi-rail power sequencing in portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±1% at +25°C; ensures stable core voltage for 2.8 V–3.0 V logic and RF ICs without external feedback. |
| Max Output Current | 150 mA continuous; sufficient for powering single-band Bluetooth SoCs or GPS baseband processors. |
| Dropout Voltage | 70–120 mV at 150 mA (VOUT = 2.8 V); enables operation down to VIN = 2.9 V, extending usable battery range in Li-ion (3.0–4.2 V) applications. |
| Quiescent Current | 50 µA typical at no load; reduces standby power loss by >90% vs. legacy bipolar LDOs, critical for IoT sensor nodes. |
| PSRR | 75 dB at 1 kHz; suppresses switching noise from DC-DC converters feeding the input rail, preserving signal integrity in RF receivers. |
| Output Capacitor | Stable with ≥1 µF X5R/X7R ceramic; eliminates need for large tantalum or electrolytic capacitors, saving PCB area and cost. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V; compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
Pinout & Package
Package: uDFN4 1.0×1.0 mm, 0.65 mm pitch, exposed thermal pad (Case 517CU). Designed for high-density portable PCB layouts with minimal footprint and optimized thermal performance via direct GND pad soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Connects to load; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 - GND | Power ground reference | Primary return path; exposed pad must be soldered to large GND copper plane for thermal dissipation and noise reduction. |
| 3 - EN | Enable control input | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables regulator and activates output discharge. |
| 4 - IN | Input voltage supply | Accepts 1.7–5.5 V; requires local 1 µF ceramic capacitor to suppress input ripple and trace inductance effects. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 100 Ω discharge path to GND when disabled - prevents floating outputs and ensures clean power-down sequencing in multi-voltage systems. |
| Ultra-Low IQ Mode | Dynamic quiescent current scaling maintains 50 µA typ. at zero load and rises only modestly under load - maximizes battery runtime in sleep states. |
| High PSRR Architecture | 75 dB rejection at 1 kHz and strong mid-frequency suppression - isolates sensitive analog/RF blocks from noisy digital supply rails. |
| Robust Protection Suite | Integrated thermal shutdown (160°C trip), current limiting (550 mA typ.), and short-circuit immunity - eliminates need for external fault management circuitry. |
| Small-Signal Stability | Guaranteed stability with 0.22–10 µF ceramic output capacitors - supports compact 0402 MLCCs and simplifies layout across temperature and bias ranges. |
Applications
| GPS Receiver Module | Bluetooth Low Energy Peripheral |
|---|---|
|
Use Scenario: Powering GNSS baseband processor and RF front-end in handheld navigation devices. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying clean, low-noise voltage to GPS chipsets requiring <100 µV RMS noise. Use Value: 75 dB PSRR rejects switching noise from companion PMIC, while 70 mV dropout extends usable battery voltage down to 2.9 V. |
Use Scenario: Regulating power for BLE SoC (e.g., nRF52832) in wearables with aggressive sleep-current targets. IC Role / Device Role / Timing Role: Always-on supply for BLE radio and sensor interface, enabled/disabled via host MCU GPIO. Use Value: 50 µA quiescent current and active discharge ensure sub-µA system standby and fast wake-up without residual output voltage. |
| Portable Medical Sensor | Smartphone Camera Module |
|
Use Scenario: Supplying analog front-end (AFE) and ADC in FDA-cleared pulse oximeter sensors. IC Role / Device Role / Timing Role: Precision 2.8 V rail for low-drift instrumentation amplifiers and sigma-delta ADCs. Use Value: ±1% output accuracy and 60 µVRMS noise (10 Hz–100 kHz) preserve measurement fidelity without post-regulation filtering. |
Use Scenario: Powering image signal processor (ISP) and CIS interface in dual-camera smartphone submodules. IC Role / Device Role / Timing Role: Secondary LDO delivering regulated 2.8 V to camera sensor I/O and PLL circuits. Use Value: Fast load transient response (<30 mV deviation) maintains timing integrity during burst image capture sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | No active output discharge; higher dropout (175 mV @ 150 mA); 2.5 µA IQ but only up to 250 mA max. | Suitable for simpler, non-sequenced systems where fast VOUT decay is unnecessary. | Select when lowest possible IQ dominates over discharge requirement and board space allows larger package (SOT-23). |
| Torex XC6206P282MR-G | Fixed 2.8 V, 150 mA, no EN pin; 1 µA IQ but lacks enable control and thermal shutdown. | Fits basic always-on rails where enable functionality and fault protection are omitted. | Choose only for cost-sensitive, static-power applications with no sequencing or safety requirements. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the NCP103AMX280TCG uniquely combines active discharge, 75 dB PSRR, and full protection in a 1.0×1.0 mm uDFN - making it optimal for compact, sequenced, noise-sensitive portable designs.
Availability
NCP103AMX280TCG is available at Aetrix Electronics and suitable for GPS receivers, Bluetooth peripherals, portable medical sensors, and smartphone camera modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP103AMX280TCG 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.
The NCP103AMX280TCG belongs to onsemi's NCP103 family of ultra-low-IQ LDOs, engineered specifically for battery-powered portable devices demanding high PSRR, small footprint, and robust protection in space-constrained environments.
FAQ
What is the output voltage tolerance of the NCP103AMX280TCG over temperature?
The NCP103AMX280TCG delivers ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), output voltage variation remains within ±2% for VOUT > 2.0 V - verified per Electrical Characteristics table in the official onsemi datasheet. This ensures reliable operation of 2.8 V logic and RF circuits across environmental extremes without calibration.
Does the NCP103AMX280TCG require an external resistor network for output voltage setting?
No, the NCP103AMX280TCG is a fixed-output LDO with factory-trimmed 2.8 V regulation. It contains no external feedback pins and does not support adjustable output voltage. The device achieves its ±1% accuracy using an internal precision bandgap reference and trimmed error amplifier - eliminating BOM cost and layout complexity associated with resistor dividers.
How does the active output discharge function operate in the NCP103AMX280TCG?
In the NCP103AMX280TCG, when the EN pin voltage falls below 0.4 V, the internal discharge transistor turns on, connecting the OUT pin to GND through a 100 Ω typical resistance. This actively pulls VOUT to near-zero volts within microseconds, preventing back-powering or undefined states in downstream circuitry - a capability absent in standard LDOs like the NCP103BMX280TCG.
Can the NCP103AMX280TCG be used with a 0402-size 1 µF ceramic capacitor?
Yes, the NCP103AMX280TCG is explicitly characterized and guaranteed stable with 1 µF X5R/X7R ceramic capacitors, including 0402 case sizes. Its design accounts for capacitance derating due to DC bias and temperature - supporting effective minimum capacitance down to 0.22 µF - making it ideal for ultra-compact portable PCBs where 0402 MLCCs are standard.
What thermal performance can be expected from the NCP103AMX280TCG on a standard FR-4 PCB?
On a 1 oz copper FR-4 board with 645 mm² ground copper area, the NCP103AMX280TCG exhibits a junction-to-ambient thermal resistance (RJA) of 170°C/W. At 150 mA load and 3.8 V input, power dissipation is ~150 mW, resulting in a ~25.5°C junction rise above ambient - well within the 150°C maximum rating and enabling reliable operation without heatsinking in most portable applications.
NCP103AMX280TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.125V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (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:
- 4-UDFN (1.0x1.0)
NCP103AMX280TCG FAQ
1.How can I place an order for NCP103AMX280TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP103AMX280TCG 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 NCP103AMX280TCG reliable?
The price and inventory of NCP103AMX280TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP103AMX280TCG is usually 5 days.
3.What payment methods are accepted for NCP103AMX280TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP103AMX280TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP103AMX280TCG?
NCP103AMX280TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP103AMX280TCG 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 NCP103AMX280TCG?
For technical support, including NCP103AMX280TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP103AMX280TCG requirements.
6.How does Aetrix verify that NCP103AMX280TCG is sourced from the original manufacturer or authorized distributors?
All NCP103AMX280TCG 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 NCP103AMX280TCG meets industry standards.
7.What is the process for return or replacement of NCP103AMX280TCG?
All NCP103AMX280TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP103AMX280TCG, 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 NCP103AMX280TCG part is unused and in its original packaging.
Return procedure for NCP103AMX280TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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