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onsemi NCP105AMX300TCG
- Part No.:
- NCP105AMX300TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP105AMX300TCG.pdf
- Description:
- IC REG LINEAR 3V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,197
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Product details
Overview
NCP105AMX300TCG from onsemi is a 150 mA, fixed 3.0 V output 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 camera modules and Bluetooth audio subsystems.
For engineers reviewing the NCP105AMX300TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (125 mV typ. @ 2.8 V), soft-start slew rate (normal mode, 190 mV/s), thermal shutdown threshold (160°C), and stability with only 1 µF ceramic output capacitor.
Technical Context
The NCP105AMX300TCG implements a PMOS pass transistor architecture with dynamic quiescent current adjustment to minimize IQ across load conditions. Its internal bandgap reference, active discharge circuit (enabled in A/C variants), and thermal shutdown with 20°C hysteresis ensure robust operation under transient overload and thermal stress.
It features dual-mode soft-start (normal slew rate only, per OPN suffix 'A'), EN-controlled enable/disable logic with 0.4 V/0.9 V thresholds, and full protection including current limiting (600 mA typ.) and reverse-current mitigation via body diode management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±1% at room temperature - ensures stable power rail for 3.0 V I/O interfaces without external feedback. |
| Max Output Current | 150 mA continuous - supports moderate-power analog sensors and RF front-end biasing. |
| Dropout Voltage | 125 mV typical at 150 mA @ 2.8 V input - enables regulation down to ~3.125 V input for 3.0 V output, critical for Li-ion battery discharge tail. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal SoC power domains. |
| Quiescent Current | 50 µA typical at no load - extends battery life in always-on sensor nodes and standby modes. |
| Thermal Shutdown | 160°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Output Capacitor | Stable with ≥1 µF X5R/X7R ceramic - eliminates need for tantalum or electrolytic capacitors, reducing board area and cost. |
Pinout & Package
Package: XDFN4 (1.0 mm × 1.0 mm, 0.65 mm pitch, Case 711AJ), thermally enhanced with exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Must connect ≥1 µF ceramic capacitor to GND; low-ESR requirement ensures loop stability and transient response. |
| 2 - GND | Power ground reference | Primary return path for load current and internal bias; exposed pad must be soldered to large copper plane for thermal relief. |
| 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 local 1 µF ceramic decoupling to suppress high-frequency noise and trace inductance effects. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 70 dB at 1 kHz - maintains clean 3.0 V rail despite ripple on shared input bus from buck converters. |
| Active Output Discharge | 100 Ω pull-down when disabled - prevents floating output and ensures fast, controlled VOUT decay for sequencing-critical peripherals. |
| Dynamic IQ Adjustment | 50 µA typ. at zero load, rising with output current - balances ultra-low standby consumption with full-load regulation capability. |
| Soft-Start (Normal Mode) | 190 mV/s VOUT slew rate - avoids inrush current spikes that could destabilize upstream supplies or trigger overcurrent protection. |
| Full Protection Suite | Current limit (600 mA), thermal shutdown (160°C), and short-circuit immunity - enables unattended operation in consumer and medical edge devices. |
Applications
| Smartphone Camera Module | Bluetooth Audio SoC Power Rail |
|---|---|
|
Use Scenario: Powering image sensor analog core and ISP interface requiring ultra-low noise and precise 3.0 V. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 3.0 V with <70 µVrms integrated noise (10 Hz–100 kHz). Use Value: Prevents image artifacts and color distortion caused by switching noise coupling into analog pixel circuitry. |
Use Scenario: Supplying 3.0 V to Bluetooth baseband and RF transceiver sections in wireless earbuds. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO isolating sensitive RF blocks from noisy digital domain supplies. Use Value: Improves receiver sensitivity and reduces bit error rate by suppressing supply-induced phase noise. |
| Portable Medical Pulse Oximeter | Wearable Fitness Sensor Hub |
|
Use Scenario: Providing stable 3.0 V to optical emitter drivers and ADC reference in battery-operated oximeters. IC Role / Device Role / Timing Role: Precision voltage source maintaining ±1% accuracy over −40°C to +85°C for calibrated photodiode measurements. Use Value: Ensures clinical-grade SpO₂ accuracy by eliminating supply-induced gain drift in analog signal chain. |
Use Scenario: Powering multi-axis accelerometer, gyroscope, and BLE radio in compact wrist-worn trackers. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO enabling >7-day battery life while supporting rapid wake-up bursts. Use Value: Extends operational runtime without compromising responsiveness during motion-triggered data logging. |
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/MB | 300 mA max output, higher dropout (330 mV @ 250 mA), no active discharge, 2.5 µA IQ | Better for ultra-low-power sleep modes but lacks fast discharge for strict power sequencing | Select when lower IQ dominates over discharge control and higher current headroom is needed. |
| Torex XC6206P302MR-G | 150 mA, 3.0 V, 1.2 µA IQ, no EN pin, no thermal shutdown, 200 mV dropout @ 100 mA | Suitable for simple always-on rails where enable control and fault protection are not required | Choose for minimal BOM count in cost-sensitive, non-critical subsystems without sequencing needs. |
Compared with MCP1700T-3002E/MB and XC6206P302MR-G, the NCP105AMX300TCG uniquely combines 150 mA capability, active output discharge, thermal shutdown, and 70 dB PSRR - making it optimal for sequenced, noise-sensitive, and safety-aware portable electronics.
Availability
NCP105AMX300TCG is available at Aetrix Electronics and suitable for smartphone camera modules, Bluetooth audio subsystems, and portable medical pulse oximeters requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP105AMX300TCG 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 focused on energy-efficient electronics, with leadership in power management, analog, and sensor technologies.
The NCP105AMX300TCG belongs to onsemi's high-PSRR, low-IQ LDO family designed specifically for battery-powered portable devices demanding precision voltage regulation, noise immunity, and robust protection in miniaturized form factors.
FAQ
What is the output voltage tolerance of the NCP105AMX300TCG over temperature?
The NCP105AMX300TCG provides ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), output voltage deviation remains within ±2% for VOUT > 2.0 V - verified per Electrical Characteristics table, ensuring reliable operation in consumer and industrial environments without external trimming.
Does the NCP105AMX300TCG support active output discharge, and how does it function?
Yes, the NCP105AMX300TCG (suffix 'A') includes 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 near-zero within milliseconds. This feature is confirmed in the PIN FUNCTION DESCRIPTION and Figure 2 block diagram, enabling safe power-down sequencing in multi-rail systems.
What is the minimum output capacitor required for stability with the NCP105AMX300TCG?
The NCP105AMX300TCG is stable with a minimum 1 µF X5R or X7R ceramic output capacitor, as specified in the Applications Information section and Typical Application Schematic. Effective capacitance must remain ≥0.47 µF across temperature, DC bias, and aging - achievable with standard 0402/0603 1 µF MLCCs rated for ≥6.3 V.
How does the NCP105AMX300TCG achieve its 70 dB PSRR at 1 kHz?
The NCP105AMX300TCG achieves 70 dB PSRR at 1 kHz through a combination of high-gain error amplifier design, optimized internal compensation, and PMOS pass transistor topology with low output impedance. This performance is measured per test conditions in the Electrical Characteristics table (VIN = 3.8 V, VOUT = 3.5 V, IOUT = 10 mA) and validated across load and temperature.
Can the NCP105AMX300TCG operate with an input voltage below 3.0 V?
Yes - the NCP105AMX300TCG operates from 1.7 V to 5.5 V input. However, regulation is only maintained while VIN exceeds VOUT + dropout voltage. At 150 mA load, dropout is 125 mV typ., so minimum functional input is ~3.125 V. Below that, output follows input (dropout mode), as characterized in Figure 11 and Electrical Characteristics.
NCP105AMX300TCG 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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)
NCP105AMX300TCG FAQ
1.How can I place an order for NCP105AMX300TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP105AMX300TCG 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 NCP105AMX300TCG reliable?
The price and inventory of NCP105AMX300TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP105AMX300TCG is usually 5 days.
3.What payment methods are accepted for NCP105AMX300TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP105AMX300TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP105AMX300TCG?
NCP105AMX300TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP105AMX300TCG 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 NCP105AMX300TCG?
For technical support, including NCP105AMX300TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP105AMX300TCG requirements.
6.How does Aetrix verify that NCP105AMX300TCG is sourced from the original manufacturer or authorized distributors?
All NCP105AMX300TCG 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 NCP105AMX300TCG meets industry standards.
7.What is the process for return or replacement of NCP105AMX300TCG?
All NCP105AMX300TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP105AMX300TCG, 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 NCP105AMX300TCG part is unused and in its original packaging.
Return procedure for NCP105AMX300TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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