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onsemi NCP103AMX180TCG
- Part No.:
- NCP103AMX180TCG
- Manufacturer:
- onsemi
- Package:
- 4-UDFN Exposed Pad
- Datasheet:
-
NCP103AMX180TCG.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 4UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,137
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Product details
Overview
NCP103AMX180TCG from onsemi is a 150 mA CMOS low-dropout (LDO) regulator with fixed 1.8 V output, active output discharge function, ±1% 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 voltage source in space-constrained, noise-sensitive battery-powered systems such as GPS modules and Bluetooth handsets.
For engineers reviewing the NCP103AMX180TCG datasheet, pinout, applications, or equivalent options, key selection criteria include quiescent current (50 µA typ), enable threshold (0.9 V high / 0.4 V low), thermal shutdown (160°C), PSRR (75 dB @ 1 kHz), and uDFN4 1.0×1.0 mm package compatibility with high-density PCB layouts.
Technical Context
The NCP103AMX180TCG employs a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current protection. Its dynamic quiescent current adjustment reduces IQ to 50 µA at no-load while maintaining regulation under full 150 mA load.
It integrates active output discharge (enabled only in "A" suffix variants like NCP103AMX180TCG), thermal shutdown with 20°C hysteresis, and current limiting (550 mA typ). The device operates across 1.7–5.5 V input and requires no minimum ESR output capacitor-stability is guaranteed with 1 µF X5R/X7R ceramic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% at room temperature - ensures precise biasing for 1.8 V logic rails and RF front-end ICs. |
| Max Output Current | 150 mA continuous - sufficient for powering microcontrollers, sensors, and wireless transceivers in portable devices. |
| Dropout Voltage | 75 mV typical at 150 mA - enables operation down to VIN = 1.875 V, extending battery runtime in single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 50 µA typical at no load - minimizes standby power loss in always-on subsystems like real-time clocks or wake-on-event circuits. |
| PSRR | 75 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters, critical for ADC reference and RF signal chain integrity. |
| Enable Threshold | 0.9 V (high), 0.4 V (low) - compatible with standard GPIOs and supports clean sequencing in multi-rail power systems. |
| Active Discharge | 100 Ω discharge path when disabled - rapidly discharges output capacitance to prevent floating voltages or unintended wake-up in sleep modes. |
Pinout & Package
Package: uDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed pad (EPAD) for thermal dissipation. RoHS-compliant, Pb-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.8 V; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 - GND | Power ground | Reference node for regulation; EPAD must be soldered directly to GND plane for thermal performance (RJA = 170°C/W). |
| 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 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 |
|---|---|
| Ultra-low quiescent current | 50 µA typical at no load - extends battery life in IoT endpoints and wearables operating >1 year on coin cells. |
| Active output discharge | 100 Ω internal FET - eliminates hold-up time during power-down, preventing latch-up in downstream logic or analog circuitry. |
| Stable with minimal capacitance | 1 µF ceramic output capacitor - reduces BOM count and board area vs. legacy LDOs requiring ≥10 µF tantalum. |
| High PSRR at low frequency | 75 dB @ 1 kHz - maintains clean supply for sensitive analog blocks (e.g., PLLs, ADCs) without additional filtering stages. |
| Thermal & current protection | 160°C shutdown + 550 mA current limit - ensures robustness during short-circuit or overload events without external components. |
Applications
| GPS Module Power Supply | Bluetooth Audio Transceiver |
|---|---|
|
Use Scenario: Powers GNSS baseband processor and RF front-end in compact handheld GPS receivers. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying core logic and RF synthesizer VCO tuning voltage. Use Value: Low noise and 75 dB PSRR prevent clock jitter degradation in 1.575 GHz L1 band reception; 75 mV dropout preserves runtime during battery sag. |
Use Scenario: Supplies 1.8 V to Bluetooth 5.0 SoC (e.g., Nordic nRF52840) in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Dedicated LDO for digital core and radio PHY, sequenced via EN pin during sleep/wake cycles. Use Value: 50 µA quiescent current minimizes idle drain; active discharge prevents cross-conduction during fast state transitions. |
| Portable Medical Sensor Node | Smartwatch Display Interface |
|
Use Scenario: Powers optical heart-rate monitor (PPG) ASIC and analog front-end in FDA-class II wearable monitors. IC Role / Device Role / Timing Role: Clean 1.8 V rail for precision ADC reference and photodiode amplifier biasing. Use Value: 60 µVRMS output noise (10 Hz–100 kHz) avoids signal-to-noise ratio degradation in sub-microamp physiological measurements. |
Use Scenario: Supplies 1.8 V to MIPI D-PHY interface between application processor and AMOLED display driver IC. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO ensuring stable termination voltage for high-speed differential signaling. Use Value: Load transient response <±20 mV (1 mA ↔ 150 mA in 1 µs) prevents data corruption during burst pixel updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 150 mA, 1.8 V fixed, 1.6 µA IQ, no active discharge, SOT-23-5 package | Lacks output discharge; higher thermal resistance (RJA ≈ 250°C/W); suited for non-sequenced, low-power always-on nodes | Select when ultra-low IQ dominates over discharge requirement and board space allows larger SOT-23 footprint. |
| Torex XC6206P182MR-G | 150 mA, 1.8 V fixed, 1 µA IQ, no thermal shutdown, SOT-25 package | No thermal or current protection; requires external capacitor for stability; lower cost but reduced safety margin | Choose for cost-sensitive consumer electronics where ambient temperature is tightly controlled and fault conditions are unlikely. |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the NCP103AMX180TCG provides integrated active discharge and robust protection (thermal + current limit) in a 1.0×1.0 mm footprint-critical for miniaturized, safety-aware designs where output voltage collapse timing and fault resilience are design requirements.
Availability
NCP103AMX180TCG is available at Aetrix Electronics and suitable for GPS navigation units, Bluetooth audio peripherals, and portable medical sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP103AMX180TCG 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 innovation for automotive, industrial, cloud, and IoT applications.
The NCP103AMX180TCG belongs to onsemi's precision LDO family designed specifically for ultra-low-power, noise-sensitive battery-operated devices-emphasizing quiescent current optimization, small-footprint packaging, and integrated protection features.
FAQ
What is the dropout voltage of the NCP103AMX180TCG at 150 mA load?
The NCP103AMX180TCG has a typical dropout voltage of 75 mV at 150 mA output current and 1.8 V nominal output. This value is confirmed in the Electrical Characteristics table (page 3 of the datasheet) under test condition VOUT = 1.8 V. Maximum dropout is specified as 165 mV across −40°C to +85°C junction temperature range, ensuring reliable operation even under worst-case thermal and process variation.
Does the NCP103AMX180TCG include active output discharge, and how does it function?
Yes, the NCP103AMX180TCG includes active output discharge-a feature exclusive to "A" suffix variants per the Ordering Information table (page 13). When the EN pin is driven below 0.4 V, an internal 100 Ω discharge path connects OUT to GND, rapidly draining output capacitance. This behavior is verified in the PIN FUNCTION DESCRIPTION (page 2) and ELECTRICAL CHARACTERISTICS (VDIS = 100 Ω, page 3).
What is the recommended output capacitor for stable operation of the NCP103AMX180TCG?
The NCP103AMX180TCG is stable with a minimum 1 µF X5R or X7R ceramic capacitor placed close to the OUT pin. The datasheet explicitly states stability is assured down to 0.22 µF (accounting for DC bias and temperature derating), and no ESR requirement is imposed. Tantalum capacitors are discouraged due to high and temperature-variable ESR, which risks instability.
What protections are integrated into the NCP103AMX180TCG?
The NCP103AMX180TCG integrates thermal shutdown (trip at 160°C, reset at 140°C hysteresis), output current limiting (550 mA typical), and short-circuit protection (580 mA typical). These are documented in the Features list (page 1), Simplified Schematic (page 2), and Electrical Characteristics table (page 3). No external components are required to implement these protections.
Is the NCP103AMX180TCG compatible with 1.0 mm × 1.0 mm PCB footprints, and what is its thermal resistance?
Yes, the NCP103AMX180TCG uses the uDFN4 1.0×1.0 mm package (Case 517CU), with mechanical dimensions confirmed in the Package Outline drawing (page 13). Its junction-to-ambient thermal resistance is 170°C/W on a 1 oz FR-4 PCB with 645 mm² copper area-verified in the THERMAL CHARACTERISTICS table (page 2). The exposed pad must be soldered to a GND plane for optimal thermal performance.
NCP103AMX180TCG 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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)
NCP103AMX180TCG FAQ
1.How can I place an order for NCP103AMX180TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP103AMX180TCG 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 NCP103AMX180TCG reliable?
The price and inventory of NCP103AMX180TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP103AMX180TCG is usually 5 days.
3.What payment methods are accepted for NCP103AMX180TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP103AMX180TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP103AMX180TCG?
NCP103AMX180TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP103AMX180TCG 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 NCP103AMX180TCG?
For technical support, including NCP103AMX180TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP103AMX180TCG requirements.
6.How does Aetrix verify that NCP103AMX180TCG is sourced from the original manufacturer or authorized distributors?
All NCP103AMX180TCG 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 NCP103AMX180TCG meets industry standards.
7.What is the process for return or replacement of NCP103AMX180TCG?
All NCP103AMX180TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP103AMX180TCG, 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 NCP103AMX180TCG part is unused and in its original packaging.
Return procedure for NCP103AMX180TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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