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onsemi NCP105AMX330TCG
- Part No.:
- NCP105AMX330TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP105AMX330TCG.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
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Product details
Overview
NCP105AMX330TCG from onsemi is a 150 mA, fixed 3.3 V low-dropout linear regulator with high PSRR (70 dB at 1 kHz), ultra-low quiescent current (50 µA typ.), and active output discharge. It operates from 1.7 V to 5.5 V input, delivers ±1% output accuracy at room temperature, and is optimized for noise-sensitive, space-constrained battery-powered systems such as smartphone power rails and wireless sensor modules.
For engineers reviewing the NCP105AMX330TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (105–165 mV), soft-start slew rate (normal mode: 190 mV/s), thermal shutdown (160°C), and stability with only 1 µF ceramic output capacitor.
Technical Context
The NCP105AMX330TCG implements a PMOS pass transistor architecture with dynamic quiescent current adjustment to minimize IQ across load conditions. Its internal bandgap reference and error amplifier deliver tight regulation under line and load transients, while integrated current limiting (600 mA typ.) and thermal shutdown (160°C) ensure robust fault protection.
It features an enable-controlled active discharge function (100 Ω typical) and dual-slew-rate soft-start (normal mode only), supporting clean power sequencing in portable electronics. The device is stable with 0.47 µF–10 µF X5R/X7R ceramic capacitors and requires no ESR constraints on COUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over −40°C to +85°C - ensures reliable logic-level supply for 3.3 V I/O domains. |
| Max Output Current | 150 mA continuous - sufficient for powering RF transceivers, camera sensors, or MCU peripherals. |
| Dropout Voltage | 105–165 mV at 150 mA - enables operation down to VIN = 3.405 V, critical for single-cell Li-ion systems. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding the input rail. |
| Quiescent Current | 50 µA typ. at no load - extends battery life in always-on monitoring circuits. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with standard GPIOs and supports direct tie-to-IN if enable not needed. |
| Thermal Shutdown | 160°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: XDFN4 (1.0 mm × 1.0 mm, 0.65 mm pitch), thermally enhanced with exposed pad (EPAD) requiring direct connection to GND plane for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Must connect ≥1 µF ceramic capacitor to GND; minimum effective capacitance 0.47 µF accounts for DC bias/temperature derating. |
| 2 - GND | Power ground reference | Primary return path for load current and IC bias; EPAD must be soldered directly to this node for thermal performance. |
| 3 - EN | Enable control input | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables output and activates 100 Ω discharge path to GND. |
| 4 - IN | Input voltage supply | Accepts 1.7–5.5 V; requires ≥1 µF ceramic capacitor close to pin to suppress input ripple and trace inductance effects. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 70 dB at 1 kHz - maintains clean 3.3 V output despite noisy shared input rails from buck converters. |
| Active Output Discharge | 100 Ω typical pull-down when disabled - prevents floating outputs and ensures fast, controlled VOUT decay during power-down sequencing. |
| Ultra-Low IQ | 50 µA typical at zero load - reduces standby power loss in battery-backed real-time clocks or wake-on-event subsystems. |
| Soft-Start (Normal Mode) | 190 mV/s VOUT slew rate - avoids inrush current and minimizes supply droop during startup into large capacitive loads. |
| Stability with Small Capacitors | Guaranteed stable with 1 µF X7R/X5R ceramic - eliminates need for larger, more expensive tantalum or polymer caps in compact layouts. |
Applications
| Smartphone Baseband Power | Wireless Sensor Node Core Supply |
|---|---|
Use Scenario: Powers baseband processor I/O banks and auxiliary analog blocks in LTE/5G handsets where input rail shares noise with RF power amplifiers. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering stable 3.3 V from a noisy 4.2 V Li-ion battery or switched-mode intermediate rail. Use Value: 70 dB PSRR attenuates 1 kHz switching artifacts from PMIC buck stages, preventing data corruption in high-speed serial interfaces. |
Use Scenario: Supplies microcontroller, BLE radio, and environmental sensors in coin-cell–powered IoT nodes operating for years on a single battery. IC Role / Device Role / Timing Role: Primary LDO providing regulated 3.3 V during active sensing bursts and ultra-low-IQ sleep mode. Use Value: 50 µA quiescent current extends battery life beyond 5 years in 1% duty-cycle applications, validated across −40°C to +85°C. |
| Camera Module AVDD Rail | Industrial Handheld Scanner Logic Supply |
Use Scenario: Generates clean 3.3 V for CMOS image sensor analog voltage (AVDD) in mobile cameras, where PSRR directly impacts image SNR. IC Role / Device Role / Timing Role: Dedicated low-noise LDO decoupling sensitive analog circuitry from digital switching noise on shared PCB planes. Use Value: 70 µVRMS output noise (10 Hz–100 kHz) and 70 dB PSRR reduce fixed-pattern noise and vertical banding in captured images. |
Use Scenario: Powers FPGA configuration logic and barcode decoder ASIC in ruggedized handheld scanners subjected to wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust 3.3 V supply with thermal shutdown and current limit protecting against accidental short-circuits during field maintenance. Use Value: ±1% output accuracy and 160°C thermal cutoff ensure reliable boot-up and operation from −20°C to +70°C industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 300 mA output, 1.6 µA IQ, no active discharge, SOT-23-5 package | Larger footprint, higher current capability but lacks discharge and lower PSRR (60 dB @ 1 kHz) | Select when ultra-low standby power dominates over fast power-down sequencing and noise rejection. |
| Torex XC6206P332MR-G | 150 mA, 1 µA IQ, no enable pin, SOT-23-3 package | No EN control or active discharge; fixed 3.3 V with ±2% accuracy and 50 dB PSRR @ 1 kHz | Choose for cost-sensitive, always-on applications where enable functionality and high PSRR are unnecessary. |
Compared with MCP1700T-3302E/MB and XC6206P332MR-G, the NCP105AMX330TCG provides superior noise immunity (70 dB vs. ≤60 dB), integrated power sequencing (EN + active discharge), and tighter accuracy (±2% vs. ±2%), making it optimal for portable electronics demanding clean, controllable 3.3 V rails.
Availability
NCP105AMX330TCG is available at Aetrix Electronics and suitable for smartphone power management, wireless sensor node design, and industrial handheld scanner development requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP105AMX330TCG 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The NCP105AMX330TCG belongs to onsemi's high-PSRR, low-IQ LDO family designed specifically for battery-powered portable devices where noise sensitivity, small size, and extended runtime are critical.
FAQ
What is the maximum input voltage rating for the NCP105AMX330TCG?
The NCP105AMX330TCG has an absolute maximum input voltage of 6 V. Operation is specified across 1.7 V to 5.5 V, with recommended use below 5.5 V to ensure reliability and thermal margin. Exceeding 6 V risks permanent damage per the Absolute Maximum Ratings table.
Does the NCP105AMX330TCG support active output discharge, and how does it behave?
Yes, the NCP105AMX330TCG supports active output discharge. When the EN pin is driven below 0.4 V, the internal 100 Ω discharge transistor connects OUT to GND, pulling VOUT to ground rapidly. This feature is confirmed in the datasheet for NCP105A variants including NCP105AMX330TCG.
What output capacitor value and type are required for stable operation of the NCP105AMX330TCG?
The NCP105AMX330TCG is stable with a minimum 1 µF X5R or X7R ceramic capacitor on the OUT pin. The datasheet confirms stability down to 0.47 µF to accommodate DC bias and temperature derating, and explicitly advises against tantalum capacitors due to high ESR and temperature sensitivity.
How does the NCP105AMX330TCG achieve ultra-low quiescent current, and what is its typical value?
The NCP105AMX330TCG uses dynamic quiescent current adjustment that scales bias current with load, achieving 50 µA typical IQ at no load. This is measured per Electrical Characteristics table (IQ = 50 µA typ. at IOUT = 0 mA, TJ = +25°C) and enables multi-year battery life in intermittent-use applications.
Is the NCP105AMX330TCG pin-compatible with other NCP105 variants, and what package does it use?
Yes, all NCP105 variants-including NCP105AMX330TCG-use the same XDFN4 (1.0 mm × 1.0 mm) package with identical 4-pin layout and EPAD grounding requirement. Pin compatibility is confirmed by the shared PIN CONNECTIONS diagram and mechanical outline CASE 711AJ in the datasheet.
NCP105AMX330TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Current Limit
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP105AMX330TCG FAQ
1.How can I place an order for NCP105AMX330TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP105AMX330TCG 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 NCP105AMX330TCG reliable?
The price and inventory of NCP105AMX330TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP105AMX330TCG is usually 5 days.
3.What payment methods are accepted for NCP105AMX330TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP105AMX330TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP105AMX330TCG?
NCP105AMX330TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP105AMX330TCG 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 NCP105AMX330TCG?
For technical support, including NCP105AMX330TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP105AMX330TCG requirements.
6.How does Aetrix verify that NCP105AMX330TCG is sourced from the original manufacturer or authorized distributors?
All NCP105AMX330TCG 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 NCP105AMX330TCG meets industry standards.
7.What is the process for return or replacement of NCP105AMX330TCG?
All NCP105AMX330TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP105AMX330TCG, 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 NCP105AMX330TCG part is unused and in its original packaging.
Return procedure for NCP105AMX330TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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