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onsemi NCP717CMX190TCG
- Part No.:
- NCP717CMX190TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP717CMX190TCG.pdf
- Description:
- IC REG LINEAR 1.9V 300MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
NCP717CMX190TCG from onsemi is a 300 mA, fixed 1.9 V output low-dropout (LDO) regulator with ultra-low quiescent current (25 µA typ.), 22 µVRMS output noise (100 Hz–100 kHz), and 175 mV typical dropout at 300 mA. It features active output discharge (120 Ω), thermal shutdown, current limiting, and stable operation with only 1 µF ceramic output capacitance - designed for noise-sensitive, space-constrained battery-powered systems.
For engineers reviewing the NCP717CMX190TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.9 V fixed output, XDFN-4 1.0×1.0 mm package, EN-controlled enable/disable with 0.4 V/0.9 V thresholds, and verified performance across −40°C to +125°C junction temperature.
Technical Context
The NCP717CMX190TCG employs a PMOS pass transistor architecture enabling reverse-current blocking and low dropout. Its adaptive quiescent current circuitry dynamically reduces ground current under light/no-load conditions while maintaining regulation accuracy within ±2% over load, line, and temperature.
It integrates an internal bandgap reference, active discharge MOSFET (120 Ω), thermal shutdown (160°C trip, 20°C hysteresis), and current limit (~379 mA). The EN pin controls both regulator state and discharge activation, with built-in 56 mV hysteresis and deglitching to reject noise-induced toggling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.9 V ±2% over load/line/temperature - ensures stable core or I/O rail for low-voltage microcontrollers and sensors. |
| Max Output Current | 300 mA continuous - supports moderate-power RF modules, display drivers, or sensor signal chains without external heatsinking. |
| Quiescent Current | 25 µA typical at no load - extends battery life in always-on wearable or IoT edge nodes. |
| Dropout Voltage | 175 mV typical at 300 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (2.4 V min) with margin. |
| Output Noise | 22 µVRMS (100 Hz–100 kHz) - meets stringent analog/RF supply requirements for ADCs, PLLs, or audio codecs. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Enable Threshold | 0.4 V (low) / 0.9 V (high) - compatible with standard GPIO logic levels and allows direct MCU control without level-shifting. |
| Active Discharge | 120 Ω pull-down when disabled - rapidly discharges output capacitance to prevent floating voltage or latch-up in multi-rail systems. |
Pinout & Package
XDFN-4 1.0×1.0 mm package with exposed thermal pad (EPAD); RoHS-compliant, Pb-free construction. Requires solder connection of EPAD to GND plane for thermal performance (RJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.9 V; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 - GND | Power ground | Reference return for IN, OUT, and EN; must be connected to large copper pour and tied to EPAD. |
| 3 - EN | Enable control input | Logic-high (>0.9 V) enables regulator; logic-low (<0.4 V) disables regulator and activates 120 Ω discharge path. |
| 4 - IN | Input supply | Accepts 1.8–5.5 V; requires ≥1 µF ceramic capacitor close to pin to suppress high-frequency noise and input transients. |
| EPAD | Thermal & electrical ground | Exposed pad must be soldered to PCB GND plane to ensure thermal reliability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 25 µA typ. at zero load - enables >1-year battery life in coin-cell-powered BLE sensors. |
| Low-noise regulation | 22 µVRMS output noise - eliminates need for additional LC filtering in precision analog signal paths. |
| Active output discharge | 120 Ω discharge path - ensures rapid, controlled VOUT ramp-down during power sequencing or fault recovery. |
| Stable with minimal capacitance | Works with 1 µF ceramic COUT - reduces BOM count and PCB area vs. legacy LDOs requiring ≥10 µF tantalum. |
| Robust protection suite | Thermal shutdown (160°C), current limit (~379 mA), and short-circuit immunity - prevents damage during abnormal operating conditions. |
| Wide input range | 1.8–5.5 V operation - supports direct connection to USB, Li-ion, or multi-cell alkaline sources without pre-regulation. |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with 10+ day runtime requirement. IC Role / Device Role / Timing Role: Primary 1.9 V supply for ultra-low-power MCU and analog front-end (AFE), enabling precise biasing and ADC reference stability. Use Value: 25 µA quiescent current minimizes standby drain; 22 µVRMS noise avoids corruption of sub-mV biomedical signals. | Use Scenario: Compact environmental sensor (temp/humidity/pressure) transmitting via Bluetooth 5.0 every 5 seconds. IC Role / Device Role / Timing Role: Regulated 1.9 V rail for BLE SoC's digital core and RF transceiver, synchronized with EN-driven wake/sleep cycles. Use Value: Active 120 Ω discharge ensures fast VOUT collapse between transmissions, eliminating leakage-induced timing skew or false wake events. |
| Industrial Handheld Scanner | Portable Medical Diagnostic Tool |
Use Scenario: Rugged barcode scanner using LiPo battery and requiring reliable operation across −20°C to +60°C ambient. IC Role / Device Role / Timing Role: Main 1.9 V supply for image sensor interface and FPGA configuration logic, with EN controlled by system power manager. Use Value: ±2% output accuracy and 175 mV dropout maintain regulation down to 2.075 V input - critical for brownout resilience during battery discharge. | Use Scenario: Battery-operated point-of-care device performing real-time pulse oximetry with optical and analog signal processing. IC Role / Device Role / Timing Role: Low-noise 1.9 V source for photodiode transimpedance amplifier and 16-bit SAR ADC reference buffer. Use Value: 70 dB PSRR at 1 kHz rejects noise from shared DC-DC converter powering digital subsystems, preserving SNR in critical measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B192MR-G | 1.9 V fixed, 300 mA, 25 µA IQ, but no active discharge; 200 mV dropout at 300 mA. | Lacks output discharge - unsuitable where fast VOUT decay is required for power sequencing or safety compliance. | Select when discharge is unnecessary and cost sensitivity outweighs functional completeness. |
| Richtek RT9080-19GB | 1.9 V fixed, 300 mA, 30 µA IQ, 250 mV dropout, no active discharge, 30 µVRMS noise. | Higher noise and no discharge - less suitable for precision analog or strict sequencing environments. | Consider only if footprint compatibility with SOT-23-5 is mandatory and thermal derating is acceptable. |
Compared with NCP717CMX190TCG, the XC6219B192MR-G offers identical output and IQ but omits active discharge, while the RT9080-19GB trades higher noise and dropout for SOT-23-5 packaging - making NCP717CMX190TCG the optimal choice for compact, low-noise, sequenced systems requiring guaranteed discharge behavior.
Availability
NCP717CMX190TCG is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and portable medical diagnostic tools requiring stable component supply, long-term lifecycle support, and validated performance across extended temperature ranges.
Supply support for NCP717CMX190TCG 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 NCP717 series is part of onsemi's precision analog portfolio, engineered specifically for ultra-low-power, low-noise, space-constrained portable electronics - emphasizing battery longevity, signal integrity, and robustness in consumer and medical edge devices.
FAQ
What is the output voltage tolerance of the NCP717CMX190TCG over temperature and load?
The NCP717CMX190TCG maintains output voltage accuracy within ±2% across −40°C to +125°C junction temperature, full 0–300 mA load range, and input voltage from VOUT(nom)+0.5 V to 5.5 V. This is verified per Electrical Characteristics table in the datasheet, ensuring consistent 1.9 V regulation in demanding thermal and dynamic conditions.
Does the NCP717CMX190TCG support active output discharge, and what is its resistance value?
Yes, the NCP717CMX190TCG includes active output discharge with a nominal resistance of 120 Ω when the EN pin is driven below 0.4 V. This feature rapidly pulls the OUT pin to GND upon disable, preventing residual voltage that could interfere with downstream logic or violate sequencing requirements - confirmed in the "Enable Operation" section and Electrical Characteristics table.
What is the minimum output capacitance required for stability with the NCP717CMX190TCG?
The NCP717CMX190TCG is stable with a minimum 1.0 µF ceramic output capacitor (X5R/X7R), and remains stable down to 100 nF with adequate safety margin. The datasheet explicitly states no ESR requirement except a maximum of 700 mΩ, and warns against tantalum capacitors due to high/temperature-variable ESR - all verified in the Applications Information section.
How does the NCP717CMX190TCG achieve ultra-low quiescent current, and what is its typical value at no load?
The NCP717CMX190TCG achieves 25 µA typical quiescent current at no load via dynamic ground current adjustment circuitry that scales bias currents with load demand. This is measured per Electrical Characteristics table (IQ parameter) and confirmed in Figure 5–10 (Quiescent Current vs. Temperature), enabling multi-year battery life in always-on applications.
What package type and dimensions does the NCP717CMX190TCG use, and is thermal pad connection required?
The NCP717CMX190TCG uses the XDFN-4 1.0×1.0 mm package (Case 711AJ) with 0.65 mm pitch and an exposed thermal pad (EPAD). The EPAD must be soldered to a GND-connected copper plane to achieve rated thermal performance (RJA = 250°C/W); failure to do so risks thermal shutdown under sustained 300 mA load - specified in Thermal Characteristics and Mechanical Outline sections.
NCP717CMX190TCG 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):
- 1.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP717CMX190TCG FAQ
1.How can I place an order for NCP717CMX190TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP717CMX190TCG 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 NCP717CMX190TCG reliable?
The price and inventory of NCP717CMX190TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP717CMX190TCG is usually 5 days.
3.What payment methods are accepted for NCP717CMX190TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP717CMX190TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP717CMX190TCG?
NCP717CMX190TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP717CMX190TCG 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 NCP717CMX190TCG?
For technical support, including NCP717CMX190TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP717CMX190TCG requirements.
6.How does Aetrix verify that NCP717CMX190TCG is sourced from the original manufacturer or authorized distributors?
All NCP717CMX190TCG 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 NCP717CMX190TCG meets industry standards.
7.What is the process for return or replacement of NCP717CMX190TCG?
All NCP717CMX190TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP717CMX190TCG, 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 NCP717CMX190TCG part is unused and in its original packaging.
Return procedure for NCP717CMX190TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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