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onsemi NCP717CMX285TCG
- Part No.:
- NCP717CMX285TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP717CMX285TCG.pdf
- Description:
- IC REG LINEAR 2.85V 300MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
NCP717CMX285TCG from onsemi is a 300 mA, fixed 2.85 V output low-dropout (LDO) regulator in XDFN-4 1.0×1.0 mm package, featuring 25 µA typical quiescent current, 22 µVRMS output noise (100 Hz–100 kHz), 175 mV typical dropout at 300 mA, ±2% output accuracy over load/line/temperature, and active output discharge via 120 Ω internal resistor - designed for noise-sensitive, space-constrained battery-powered applications including GPS modules and portable medical devices.
For engineers reviewing the NCP717CMX285TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low IQ operation down to 25 µA at no-load, guaranteed active discharge behavior (C-version), stability with only 1 µF ceramic output capacitor, and thermal shutdown/current limit protection - all critical for reliable power management in compact portable electronics.
Technical Context
The NCP717CMX285TCG employs a PMOS pass transistor architecture enabling reverse-current blocking and low dropout performance. Its adaptive ground current circuitry dynamically reduces IQ under light/no-load conditions while maintaining regulation accuracy within ±2% across −40°C to +125°C junction temperature.
It integrates EN-controlled logic with 0.4 V low-threshold and 0.9 V high-threshold, built-in 56 mV hysteresis, and an internal 180 nA pull-down current source. The C-version specifically includes an active output discharge path (120 Ω) activated during shutdown, distinguishing it from A- and B-versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V - tightly regulated with ±2% tolerance across full operating range; enables direct replacement of 2.85 V rails without external feedback. |
| Max Output Current | 300 mA continuous - supports moderate-power RF and sensor subsystems; current limit set at 379 mA (typ) to protect against overload. |
| Quiescent Current | 25 µA (typ) at no-load - extends battery life in always-on wearable and IoT edge nodes where standby power dominates energy budget. |
| Dropout Voltage | 175 mV (typ) at 300 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) with margin for voltage sag. |
| Output Noise | 22 µVRMS (100 Hz–100 kHz) - meets stringent analog/RF supply requirements for GPS receivers and audio codecs without additional filtering. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters, reducing need for extra LC filtering stages. |
| Active Discharge | 120 Ω internal path - ensures rapid VOUT decay (<1 ms) after shutdown, preventing unintended wake-up or latch-up in multi-rail systems. |
Pinout & Package
XDFN-4 1.0×1.0 mm package (Case 711AJ) with exposed pad (EPAD) for thermal dissipation; requires soldering EPAD directly to GND plane for optimal thermal performance (RJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output voltage node | Delivers stable 2.85 V; requires ≥1 µF ceramic capacitor to GND for stability; trace resistance must be minimized to preserve load regulation. |
| 2 - GND | Power ground reference | Common return for IN, OUT, and EN; EPAD must be connected directly to this pin and large PCB ground plane for thermal management. |
| 3 - EN | Enable control input | Logic-high (>0.9 V) enables regulator; logic-low (<0.4 V) disables it and activates 120 Ω discharge path; internal 180 nA pull-down ensures default-off state. |
| 4 - IN | Input voltage supply | Accepts 1.8–5.5 V; requires ≥1 µF ceramic capacitor close to pin to suppress high-frequency noise and support transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 25 µA typ. at no-load - enables >1-year battery life in coin-cell-powered sensors with periodic wake-up cycles. |
| Active output discharge | 120 Ω internal MOSFET path - eliminates hold-up voltage on VOUT during shutdown, preventing back-powering of downstream circuits. |
| Stability with minimal capacitance | Guaranteed stable with 1 µF ceramic COUT - reduces BOM count and board area vs. legacy LDOs requiring 10–22 µF tantalum. |
| High PSRR at 1 kHz | 70 dB - rejects ripple from switching regulators feeding the LDO input, simplifying power tree design in mixed-signal SoC platforms. |
| Thermal & current protection | 160°C thermal shutdown with 20°C hysteresis and 379 mA current limit - prevents damage during sustained overload or poor heatsinking. |
Applications
| GPS Module Power Supply | Wearable Heart Rate Monitor |
|---|---|
Use Scenario: Powers GNSS receiver IC (e.g., u-blox NEO-M8) in handheld navigation device with intermittent satellite acquisition. IC Role / Device Role / Timing Role: Primary 2.85 V analog supply for RF front-end and baseband processor; provides clean, low-noise bias independent of battery voltage decay. Use Value: 22 µVRMS noise and 70 dB PSRR prevent degradation of carrier-to-noise ratio (C/N₀), maintaining <3 m position accuracy even under weak-signal conditions. | Use Scenario: Supplies optical sensor and ADC in wrist-worn PPG-based heart rate monitor operating on CR2032 coin cell. IC Role / Device Role / Timing Role: Always-on 2.85 V rail for photodiode amplifier and analog signal chain; enabled only during 100-ms measurement bursts. Use Value: 25 µA quiescent current and fast EN-controlled turn-on/turn-off minimize average system current, extending battery life to >6 months per charge. |
| Bluetooth LE Audio Transmitter | Portable ECG Front-End |
Use Scenario: Powers CSR8675 Bluetooth audio SoC in true wireless stereo (TWS) earbud charging case with integrated DAC/amp. IC Role / Device Role / Timing Role: Secondary 2.85 V supply for Class AB headphone amplifier stage; isolated from noisy digital core via LDO regulation. Use Value: Active 120 Ω discharge clears residual charge before next audio playback cycle, eliminating pop/click artifacts during rapid power cycling. | Use Scenario: Supplies instrumentation amplifier and 24-bit delta-sigma ADC in handheld 3-lead ECG device powered by two AAA batteries. IC Role / Device Role / Timing Role: Precision analog rail for signal conditioning path; must maintain ±2% accuracy across battery voltage range (3.2–1.8 V) and temperature. Use Value: ±2% output accuracy and <5 mV load regulation error ensure consistent gain calibration, enabling diagnostic-grade waveform fidelity without software correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B285MR-G | 280 mV dropout at 300 mA; no active discharge; 35 µA IQ; SOT-25 package (2.9×2.8 mm) | Larger footprint; higher dropout limits use with lower VIN sources; lacks discharge function for fast rail collapse. | Select when board space permits larger package and active discharge is unnecessary. |
| Richtek RT9013-28PU5 | 250 mV dropout at 300 mA; 2.5 µA IQ (ultra-low); no active discharge; SOT-23-5 package | Superior IQ for multi-year battery life but higher noise (45 µVRMS) and no discharge path; unsuitable for noise-critical analog rails. | Select only for ultra-low-power sleep modes where noise and discharge are secondary concerns. |
Compared with Torex XC6219B285MR-G and Richtek RT9013-28PU5, the NCP717CMX285TCG uniquely balances ultra-low noise (22 µVRMS), guaranteed active discharge (120 Ω), and minimal 1.0×1.0 mm footprint - making it the only option meeting simultaneous requirements for GPS-grade signal integrity, rapid power sequencing, and ultra-compact layout in portable medical and navigation devices.
Availability
NCP717CMX285TCG is available at Aetrix Electronics and suitable for GPS modules, wearable biosensors, Bluetooth LE audio transmitters, and portable ECG front-ends requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP717CMX285TCG 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-noise, ultra-low-IQ power management in space-constrained portable electronics - emphasizing battery longevity, signal integrity, and robust protection features.
FAQ
What is the output voltage tolerance of the NCP717CMX285TCG over temperature and load?
The NCP717CMX285TCG maintains ±2% output voltage accuracy 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 on page 3 of the datasheet, ensuring stable 2.85 V operation in demanding environmental conditions without external trimming.
Does the NCP717CMX285TCG support active output discharge, and how does it behave?
Yes, the NCP717CMX285TCG (C-version) includes active output discharge via a 120 Ω internal NMOS path activated when EN falls below 0.4 V. This discharges VOUT to GND rapidly - typically within <1 ms for a 1 µF capacitor - preventing back-powering and ensuring clean power sequencing in multi-rail systems. This feature is absent in A- and B-versions.
What is the minimum output capacitor required for stability with the NCP717CMX285TCG?
The NCP717CMX285TCG is stable with a minimum 1.0 µF ceramic (X5R/X7R) output capacitor, as confirmed in the Applications Information section (page 13). While 100 nF is the absolute minimum effective capacitance, 1.0 µF provides sufficient safety margin for DC bias, temperature, and tolerance variations - eliminating need for larger or specialized capacitors.
How does the quiescent current of the NCP717CMX285TCG vary with input voltage and temperature?
Per Figures 5–10 in the datasheet, the NCP717CMX285TCG exhibits 25 µA typical quiescent current at 25°C and no load, rising to ~35 µA at 125°C and remaining stable across 1.8–5.5 V input range. This dynamic adjustment ensures minimal battery drain across full operating conditions - critical for always-on portable devices.
What protection features are integrated into the NCP717CMX285TCG?
The NCP717CMX285TCG integrates thermal shutdown (160°C trip, 140°C reset hysteresis), output current limiting (379 mA typ), short-circuit protection (390 mA typ), and reverse-current blocking via its PMOS pass element. These protections operate autonomously without external components, ensuring robust operation in fault conditions per Absolute Maximum Ratings and Applications Information sections.
NCP717CMX285TCG 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.265V @ 300mA
- 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)
NCP717CMX285TCG FAQ
1.How can I place an order for NCP717CMX285TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP717CMX285TCG 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 NCP717CMX285TCG reliable?
The price and inventory of NCP717CMX285TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP717CMX285TCG is usually 5 days.
3.What payment methods are accepted for NCP717CMX285TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP717CMX285TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP717CMX285TCG?
NCP717CMX285TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP717CMX285TCG 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 NCP717CMX285TCG?
For technical support, including NCP717CMX285TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP717CMX285TCG requirements.
6.How does Aetrix verify that NCP717CMX285TCG is sourced from the original manufacturer or authorized distributors?
All NCP717CMX285TCG 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 NCP717CMX285TCG meets industry standards.
7.What is the process for return or replacement of NCP717CMX285TCG?
All NCP717CMX285TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP717CMX285TCG, 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 NCP717CMX285TCG part is unused and in its original packaging.
Return procedure for NCP717CMX285TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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