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onsemi NCP105AMX100TCG
- Part No.:
- NCP105AMX100TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP105AMX100TCG.pdf
- Description:
- IC REG LINEAR 1V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,980
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Product details
Overview
NCP105AMX100TCG from onsemi is a 150 mA low-dropout linear regulator with fixed 1.05 V output, optimized for battery-powered portable electronics requiring ultra-low quiescent current (50 µA typ.), high PSRR (70 dB at 1 kHz), and stable operation with only 1 µF ceramic output capacitance. It features active output discharge (100 Ω), thermal shutdown, and current limiting.
For engineers reviewing the NCP105AMX100TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (220–330 mV for 1.8 V version, scaled per VOUT), EN pin threshold (0.4 V low / 0.9 V high), soft-start slew rate (normal mode, 190 mV/s), and XDFN4 package compatibility with space-constrained PCB layouts.
Technical Context
The NCP105AMX100TCG 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 ±1% output accuracy over −40°C to +85°C, while the integrated thermal shutdown (160°C trip, 20°C hysteresis) and current limit (200–600 mA) ensure robust fault protection without external components.
It supports enable-controlled sequencing via a logic-level EN pin with internal 300 nA pull-down, enabling reliable power-up/down control in multi-rail systems. The device's stability with 1 µF X5R/X7R ceramic output capacitors eliminates need for ESR tuning, and its high PSRR is maintained across 10 Hz–1 MHz with minimal sensitivity to input capacitor ESR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05 V - matches core voltage requirements of low-power microcontrollers and sensors. |
| Max Output Current | 150 mA - sufficient for powering RF transceivers, camera modules, or sensor hubs in portable devices. |
| Quiescent Current | 50 µA typical at no load - extends battery life in always-on monitoring applications. |
| Dropout Voltage | 220–330 mV at 150 mA (for 1.8 V variant; scales linearly with VOUT) - enables regulation from single-cell Li-ion down to ~1.3 V input. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input rail. |
| Accuracy | ±1% at room temperature - ensures precise voltage delivery to analog circuitry and ADC references. |
| Enable Threshold | 0.4 V (low) / 0.9 V (high) - compatible with 1.8 V and 3.3 V GPIO without level-shifting. |
| Active Discharge | 100 Ω resistor to GND when disabled - prevents floating outputs and enables fast VOUT decay for system reset timing. |
Pinout & Package
Package: XDFN4 (1.0 mm × 1.0 mm, 0.65 mm pitch), Case 711AJ, with exposed thermal pad connected to GND for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.05 V; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 - GND | Power ground | Reference node for all internal circuitry; must be tied directly to PCB ground plane and exposed pad. |
| 3 - EN | Enable control input | Logic-compatible input: <0.4 V = shutdown (active discharge enabled), >0.9 V = regulation active. |
| 4 - IN | Input supply | Accepts 1.7–5.5 V; requires local 1 µF ceramic decoupling capacitor to suppress high-frequency noise. |
| EPAD | Thermal pad | Must be soldered to large GND copper area to maintain junction temperature within 150°C limit under full load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ with dynamic adjustment | 50 µA typ. at no load, scaling with output current - minimizes standby power in IoT edge nodes. |
| High PSRR across wide frequency range | 70 dB at 1 kHz, >40 dB up to 100 kHz - maintains clean supply for RF and precision analog circuits. |
| Soft-start with dual slew rates | Normal mode (190 mV/s) - prevents inrush current and avoids false resets during power-up. |
| Integrated protection suite | Thermal shutdown (160°C), current limit (600 mA typ.), and reverse-current blocking - eliminates need for external protection components. |
| Stable with minimal output capacitance | Guaranteed stability with 1 µF X7R/X5R ceramic - reduces BOM count and board area vs. traditional LDOs requiring 10–22 µF. |
| Active output discharge | 100 Ω discharge path to GND when disabled - ensures rapid, controlled VOUT decay for deterministic system sequencing. |
Applications
| Mobile Wireless Sensor Node | Wearable Health Monitor |
|---|---|
Use Scenario: Compact BLE-enabled environmental sensor logging temperature/humidity with intermittent transmission. IC Role / Device Role / Timing Role: Supplies regulated 1.05 V to ultra-low-power MCU and analog front-end, synchronized with EN-driven wake-up cycles. Use Value: 50 µA quiescent current extends coin-cell battery life beyond 1 year; 1 µF output cap enables 2.0 × 2.0 mm total solution size. | Use Scenario: Optical heart-rate monitor using photodiode array and analog signal chain powered from single Li-poly cell. IC Role / Device Role / Timing Role: Provides low-noise 1.05 V bias to op-amps and ADC, with EN pin coordinated to LED pulsing timing. Use Value: 70 dB PSRR rejects switching noise from companion buck converter; ±1% accuracy ensures consistent ADC reference scaling. |
| Portable Medical Diagnostic Tool | Low-Power Industrial Edge Controller |
Use Scenario: Handheld glucose meter with LCD display, button interface, and electrochemical sensor interface. IC Role / Device Role / Timing Role: Powers sensor bias circuitry and microcontroller core domain, entering shutdown between measurements. Use Value: Active discharge clears residual charge before next measurement cycle, preventing baseline drift; thermal shutdown protects against enclosure overheating. | Use Scenario: Battery-backed programmable logic controller module operating in remote industrial settings with wide ambient temperature swings. IC Role / Device Role / Timing Role: Regulates 1.05 V for FPGA configuration memory and I/O banks, with EN controlled by system supervisor IC. Use Value: −40°C to +85°C guaranteed operation ensures reliability in uncontrolled environments; 150 mA output supports burst-mode communication loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/MB | 100 mA max output, 1.0 V fixed output, 2 µA IQ, no active discharge, SOT-23-5 package | Limited to lower current loads; lacks discharge function and thermal shutdown hysteresis | Select when ultra-low IQ dominates over output current and discharge requirements. |
| Torex XC6210B102MR-G | 150 mA, 1.0 V fixed, 1 µA IQ, no active discharge, USP-4 package (1.2 × 1.2 mm) | Smaller IQ but no discharge or thermal hysteresis; different pinout and footprint | Prefer for longest battery life where discharge sequencing is handled externally. |
Compared with MCP1700T-1002E/MB and XC6210B102MR-G, the NCP105AMX100TCG delivers higher output current headroom, integrated active discharge for deterministic power-down, and tighter thermal protection (160°C trip + 20°C hysteresis), making it optimal for compact, safety-critical portable systems requiring robust fault management.
Availability
NCP105AMX100TCG is available at Aetrix Electronics and suitable for mobile wireless sensor nodes, wearable health monitors, portable medical diagnostic tools, and low-power industrial edge controllers requiring stable component supply with full traceability and lifecycle support.
Supply support for NCP105AMX100TCG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP105AMX100TCG belongs to onsemi's high-PSRR, low-IQ LDO family designed specifically for noise-sensitive, battery-operated portable electronics where space, efficiency, and reliability are critical constraints.
FAQ
What is the output voltage tolerance of the NCP105AMX100TCG over temperature?
The NCP105AMX100TCG provides ±1% output voltage accuracy at room temperature. Over the full operating junction temperature range (−40°C to +85°C), output voltage deviation remains within ±40 mV for VOUT ≤ 2.0 V - corresponding to ±3.8% for the 1.05 V nominal output. This is verified per Electrical Characteristics table on page 3 of the datasheet.
Does the NCP105AMX100TCG support active output discharge, and how does it behave?
Yes, the NCP105AMX100TCG includes active output discharge. When the EN pin voltage falls below 0.4 V, the internal 100 Ω discharge resistor connects OUT to GND, pulling VOUT to ground rapidly. This feature is confirmed in the Pin Function Description (page 2) and Electrical Characteristics (page 3, RDIS = 100 Ω) of the NCP105AMX100TCG datasheet.
What is the minimum input voltage required for the NCP105AMX100TCG to regulate at 1.05 V output?
The NCP105AMX100TCG requires a minimum input voltage of 1.7 V per Absolute Maximum Ratings and Electrical Characteristics. To maintain regulation at full 150 mA load, VIN must exceed VOUT + VDO - where VDO is 220–330 mV for the 1.8 V version and scales proportionally. For 1.05 V output, typical dropout is ~120–180 mV, so VIN ≥ 1.17 V is sufficient, but 1.7 V is the absolute minimum per spec.
Can the NCP105AMX100TCG operate with a 0.47 µF output capacitor?
Yes - the NCP105AMX100TCG is stable with a minimum effective output capacitance of 0.47 µF, as stated in Applications Information (page 12). This accounts for capacitance loss due to DC bias, temperature, and package size (e.g., 0402 MLCC). However, 1 µF is recommended for optimal transient response and PSRR performance.
Is the NCP105AMX100TCG RoHS-compliant and lead-free?
Yes, the NCP105AMX100TCG is a Pb-free device, as explicitly stated in the Features section (page 1) and Ordering Information (page 14) of the official onsemi datasheet. The "G" suffix in the part number denotes RoHS-compliant, lead-free packaging per JEDEC standards.
NCP105AMX100TCG 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):
- 1V
- 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)
NCP105AMX100TCG FAQ
1.How can I place an order for NCP105AMX100TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP105AMX100TCG 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 NCP105AMX100TCG reliable?
The price and inventory of NCP105AMX100TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP105AMX100TCG is usually 5 days.
3.What payment methods are accepted for NCP105AMX100TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP105AMX100TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP105AMX100TCG?
NCP105AMX100TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP105AMX100TCG 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 NCP105AMX100TCG?
For technical support, including NCP105AMX100TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP105AMX100TCG requirements.
6.How does Aetrix verify that NCP105AMX100TCG is sourced from the original manufacturer or authorized distributors?
All NCP105AMX100TCG 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 NCP105AMX100TCG meets industry standards.
7.What is the process for return or replacement of NCP105AMX100TCG?
All NCP105AMX100TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP105AMX100TCG, 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 NCP105AMX100TCG part is unused and in its original packaging.
Return procedure for NCP105AMX100TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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