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onsemi NCP115CMX105TCG
- Part No.:
- NCP115CMX105TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP115CMX105TCG.pdf
- Description:
- IC REG LINEAR 1.05V 300MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,032
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Product details
Overview
NCP115CMX105TCG from onsemi is a 300 mA, 1.05 V fixed-output low-dropout linear regulator in XDFN4 package, featuring ±1% output accuracy, 70 dB PSRR at 1 kHz, and dynamic quiescent current adjustment (typ. 50 µA) for battery-powered portable electronics including smartphones and medical sensors.
For engineers reviewing the NCP115CMX105TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its slow-slew-rate soft-start (20 mV/s), active output discharge (100 Ω), thermal shutdown (160°C), and stability with only 1 µF ceramic output capacitor.
Technical Context
The NCP115CMX105TCG implements a PMOS pass transistor architecture with integrated enable logic, active discharge MOSFET, and bandgap reference. Its slow slew-rate option (C-version) is specifically designed to prevent inrush-induced voltage droop in camera sensor and RF power amplifier rails.
It operates across 1.7–5.5 V input range with dropout of 250 mV typical at 300 mA (VOUT = 2.8 V), supports full protection suite (current limit, thermal shutdown, short-circuit immunity), and maintains stability without ESR requirements on the 1 µF output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05 V - precisely regulated for low-voltage core logic or memory I/O rails requiring tight tolerance. |
| Max Output Current | 300 mA - sufficient for single-core microcontrollers, sensor hubs, or Bluetooth baseband ICs. |
| Dropout Voltage | 250 mV @ 300 mA, VOUT = 2.8 V - enables operation from single-cell Li-ion (3.0 V min) with margin. |
| Quiescent Current | Typ. 50 µA - extends battery life in always-on sensor nodes and wearable standby modes. |
| PSRR | 70 dB @ 1 kHz - suppresses switching noise from DC-DC converters feeding adjacent analog/RF blocks. |
| Output Accuracy | ±1% @ 25°C - ensures reliable logic-level compatibility and ADC reference stability. |
| VOUT Slew Rate | 20 mV/s (slow mode) - prevents false triggering in camera modules and mitigates supply rail coupling. |
| Active Discharge | 100 Ω pull-down - rapidly discharges output during shutdown to avoid back-powering downstream circuitry. |
Pinout & Package
XDFN4 (Case 711AJ), 1.0 mm × 1.0 mm, 0.65 mm pitch, exposed pad (EPAD) for thermal dissipation. Pin 1 = IN, Pin 2 = GND, Pin 3 = EN, Pin 4 = OUT. EPAD must be soldered directly to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input supply connection | Accepts 1.7–5.5 V; requires ≥1 µF ceramic decoupling close to pin to suppress high-frequency noise. |
| GND (Pin 2) | Power ground reference | Common return path for input/output currents; connects to EPAD for optimal thermal performance. |
| EN (Pin 3) | Enable control input | Logic-high (>0.9 V) enables regulation; logic-low (<0.4 V) disables output and activates discharge. |
| OUT (Pin 4) | Regulated output | Delivers stable 1.05 V; requires ≥1 µF ceramic capacitor to ground for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Slow slew-rate soft-start | 20 mV/s ramp-up prevents inrush current spikes in camera sensor power domains. |
| Active output discharge | 100 Ω internal pull-down ensures rapid VOUT decay during disable, avoiding back-feeding. |
| Ultra-low IQ | 50 µA typical no-load current extends runtime in battery-constrained IoT endpoints. |
| High PSRR | 70 dB at 1 kHz suppresses ripple from noisy switchers powering mixed-signal SoCs. |
| Thermal shutdown | 160°C trip with 20°C hysteresis protects against sustained overload or poor PCB heatsinking. |
| Stable with 1 µF COUT | No ESR requirement simplifies BOM and layout-enables use of compact 0402 X7R ceramics. |
Applications
| Smartphone Baseband Power | Wearable Sensor Hub |
|---|---|
|
Use Scenario: Powers ARM Cortex-M0+ MCU and MEMS accelerometer in ultra-thin fitness tracker. IC Role / Device Role / Timing Role: Primary LDO supplying 1.05 V core voltage with fast load transient response. Use Value: 300 mA capability and 20 mV/s slew rate prevent brownout during motion-triggered data bursts. |
Use Scenario: Supplies 1.05 V to Bluetooth Low Energy (BLE) radio transceiver during advertising intervals. IC Role / Device Role / Timing Role: Standby-optimized LDO enabling sub-µA sleep current and rapid wake-up. Use Value: 50 µA quiescent current and 0.1 µA shutdown current maximize coin-cell battery life beyond 12 months. |
| Medical Pulse Oximeter | Industrial Handheld Scanner |
|
Use Scenario: Provides clean 1.05 V bias to analog front-end (AFE) and optical sensor driver. IC Role / Device Role / Timing Role: Low-noise, high-PSRR regulator isolating sensitive analog measurements from digital noise. Use Value: 70 dB PSRR at 1 kHz rejects switching artifacts from display backlight drivers and improves SpO₂ accuracy. |
Use Scenario: Powers 1.05 V FPGA configuration logic and barcode image sensor interface in ruggedized scanner. IC Role / Device Role / Timing Role: Robust LDO with thermal shutdown and current limiting for field-deployed equipment. Use Value: 160°C thermal cutoff and 600 mA current limit prevent failure during extended scanning under high ambient temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP115AMX105TCG | Same 1.05 V output, but normal slew rate (190 mV/s); no active discharge in A-version. | Suitable where fast turn-on is required and back-powering risk is absent. | Select when faster startup time is prioritized over controlled ramp-up for sensitive loads. |
| MCP1703T-105I/OT | 1.05 V fixed, 250 mA max, 6 µA IQ, no active discharge, TSOT-23-5 package. | Limited current and no discharge function; lower IQ but less robust for high-transient loads. | Choose for cost-sensitive, low-current applications where discharge is not needed and board space allows TSOT-23. |
Compared with NCP115AMX105TCG and MCP1703T-105I/OT, the NCP115CMX105TCG uniquely combines slow slew rate, active discharge, and 300 mA drive in a 1.0×1.0 mm XDFN4 footprint-making it optimal for space-constrained, noise-sensitive, and fast-shutdown-critical designs.
Availability
NCP115CMX105TCG is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, and medical pulse oximeters requiring stable component supply, long-lifecycle support, and Pb-free compliance.
Supply support for NCP115CMX105TCG 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 NCP115CMX105TCG belongs to onsemi's high-PSRR, low-IQ LDO family engineered specifically for battery-powered portable electronics demanding precision regulation, minimal noise, and robust protection.
FAQ
What is the output voltage tolerance of the NCP115CMX105TCG over temperature?
The NCP115CMX105TCG delivers ±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 ±40 mV for VOUT ≤ 2.0 V - confirmed per Electrical Characteristics table in the official datasheet. This ensures reliable operation in consumer-grade portable environments.
Does the NCP115CMX105TCG require an external resistor to set output voltage?
No, the NCP115CMX105TCG is a fixed-output LDO with factory-trimmed 1.05 V regulation. It does not support adjustable output via external resistors. The voltage is laser-trimmed during manufacturing and specified as ±1% accurate at 25°C - eliminating BOM cost and layout complexity associated with feedback networks.
Can the NCP115CMX105TCG operate with only a 1 µF output capacitor?
Yes, the NCP115CMX105TCG is explicitly designed to remain stable with a minimum 1 µF ceramic output capacitor (X5R/X7R dielectric), as stated in both the Features list and Applications Information section. No ESR requirement simplifies design and enables use of small 0402-case capacitors.
What is the purpose of the active output discharge function in the NCP115CMX105TCG?
The active output discharge function in the NCP115CMX105TCG pulls the OUT pin to GND through a 100 Ω internal resistor when EN is low. This prevents back-powering of upstream circuitry or unintended latch-up in systems with multiple power domains - critical in smartphones and medical devices where sequencing integrity is mandatory.
How does the slow slew-rate feature of the NCP115CMX105TCG benefit camera sensor applications?
The NCP115CMX105TCG's 20 mV/s slew rate (C-version) limits inrush current during power-up, preventing voltage droop that could corrupt image sensor initialization or trigger false resets. This controlled ramp-up is validated in Figure 28–29 of the datasheet and essential for reliable operation of CMOS image sensors in mobile devices.
NCP115CMX105TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.05V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP115CMX105TCG FAQ
1.How can I place an order for NCP115CMX105TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP115CMX105TCG 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 NCP115CMX105TCG reliable?
The price and inventory of NCP115CMX105TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP115CMX105TCG is usually 5 days.
3.What payment methods are accepted for NCP115CMX105TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP115CMX105TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP115CMX105TCG?
NCP115CMX105TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP115CMX105TCG 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 NCP115CMX105TCG?
For technical support, including NCP115CMX105TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP115CMX105TCG requirements.
6.How does Aetrix verify that NCP115CMX105TCG is sourced from the original manufacturer or authorized distributors?
All NCP115CMX105TCG 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 NCP115CMX105TCG meets industry standards.
7.What is the process for return or replacement of NCP115CMX105TCG?
All NCP115CMX105TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP115CMX105TCG, 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 NCP115CMX105TCG part is unused and in its original packaging.
Return procedure for NCP115CMX105TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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