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onsemi NCP717CMX285TBG
- Part No.:
- NCP717CMX285TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP717CMX285TBG.pdf
- Description:
- IC REG LINEAR 2.85V 300MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,487
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Product details
Overview
NCP717CMX285TBG from onsemi is a 300 mA, fixed 2.85 V 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 a 1 µF ceramic output capacitor - designed for noise-sensitive, space-constrained battery-powered applications such as GPS modules and Bluetooth handsets.
For engineers reviewing the NCP717CMX285TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.85 V fixed output, XDFN4 1.0×1.0 mm package, ±2% output accuracy over load/line/temperature, 70 dB PSRR at 1 kHz, and EN-controlled enable/disable with 0.4 V/0.9 V thresholds.
Technical Context
The NCP717CMX285TBG uses a PMOS pass transistor architecture enabling reverse-current blocking and low dropout across its 1.8 V to 5.5 V input range. Its adaptive quiescent current circuitry dynamically reduces ground current under light/no-load conditions while maintaining regulation integrity.
It integrates an internal bandgap reference, error amplifier, MOSFET driver with current limit, thermal shutdown logic, and an active discharge switch (120 Ω) activated during disable. The EN pin includes 56 mV hysteresis and a 180 nA internal pull-down to ensure robust start-up and noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2% over load, line, and temperature - ensures stable rail for RF front-ends or precision analog circuits without external feedback. |
| Max Output Current | 300 mA continuous - supports moderate-power microcontrollers, sensors, or wireless transceivers in portable systems. |
| Dropout Voltage | 175 mV typical at 300 mA - enables operation down to VIN = 3.025 V, critical for single-cell Li-ion or Li-poly battery systems. |
| Quiescent Current | 25 µA typical at no load - extends battery life in always-on monitoring or standby modes of IoT edge nodes. |
| Output Noise | 22 µVRMS (100 Hz–100 kHz) - meets stringent noise requirements for ADC references, RF synthesizers, or audio codecs. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Active Discharge | 120 Ω discharge path - rapidly discharges output capacitance upon shutdown, preventing unintended wake-up or latch-up in multi-rail systems. |
Pinout & Package
Package: XDFN4 1.0×1.0 mm, 0.65 mm pitch, exposed pad (EPAD) for thermal dissipation. RoHS-compliant, Pb-free.
| 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 and transient response. |
| 2 - GND | Power ground reference | Primary return path; EPAD must be soldered directly to this node and a large PCB ground plane for thermal management. |
| 3 - EN | Logic-enable control input | Drives high (>0.9 V) to enable regulator; low (<0.4 V) to disable with active discharge; 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 input ripple and support fast load transients. |
| EPAD | Thermal and electrical ground pad | Must be connected to GND plane; provides primary thermal conduction path (RJA = 250 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 25 µA typical at zero load - enables >1-year battery life in coin-cell-powered wearables with periodic sensing. |
| Low-noise regulation | 22 µVRMS output noise - eliminates need for post-LDO filtering in sensitive RF or precision analog signal chains. |
| Stable with minimal capacitance | Guaranteed stability with 1 µF ceramic COUT - reduces BOM count and board area vs. legacy LDOs requiring 10–22 µF tantalum. |
| Integrated protection | Thermal shutdown (160°C), current limit (~379 mA), and short-circuit tolerance - eliminates need for external fault-handling circuitry. |
| Active output discharge | 120 Ω discharge path (C-version) - prevents floating outputs and cross-conduction in power-sequenced systems. |
| Wide input range | 1.8 V to 5.5 V operation - supports direct connection to single-cell Li-ion (2.7–4.2 V), USB (4.75–5.25 V), or dual-cell alkaline rails. |
Applications
| GPS Module Power | Bluetooth Audio SoC Supply |
|---|---|
Use Scenario: Powering GNSS receiver ICs (e.g., u-blox NEO-M8) in handheld navigation devices with tight EMI constraints and limited PCB area. IC Role / Device Role / Timing Role: Primary 2.85 V analog supply for RF front-end and baseband processor, replacing noisier switching regulators. Use Value: 22 µVRMS noise and 70 dB PSRR prevent degradation of C/N0 ratio and position fix accuracy under dynamic RF interference. | Use Scenario: Supplying the 2.85 V I/O and analog rail of Bluetooth 5.0 audio SoCs (e.g., Qualcomm QCC3040) in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Low-noise, low-IQ bias rail for DACs, ADCs, and RF synthesizers within the audio subsystem. Use Value: Active discharge ensures rapid VOUT collapse during sleep mode transitions, eliminating pop/click artifacts and reducing system-level power sequencing complexity. |
| Portable Medical Sensor Node | Industrial Wireless Transmitter |
Use Scenario: Providing regulated 2.85 V to low-power biosensor signal conditioning circuits (ECG, SpO₂) in FDA-cleared wearable monitors. IC Role / Device Role / Timing Role: Precision analog supply for instrumentation amplifiers and 16-bit SAR ADCs requiring stable, low-drift voltage references. Use Value: ±2% output accuracy over −40°C to +125°C and <5 mV load regulation ensure consistent sensor gain calibration across operating temperature and battery discharge cycles. | Use Scenario: Powering sub-GHz RF transceivers (e.g., Silicon Labs Si4463) in battery-operated smart meter endpoints deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Main 2.85 V supply for RF PA bias and digital core, operating from wide-input industrial batteries (2.5–5.5 V). Use Value: 175 mV dropout at 300 mA allows full transmit power operation even at end-of-life battery voltage (≈2.9 V), extending field deployment lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-285I/OT | 250 mA max output, 6 µA IQ, no active discharge, SOT-23-5 package | Lacks active discharge and higher current capability; suitable only for simpler, lower-power loads | Select when ultra-low IQ dominates over output drive and discharge requirements |
| TPL7407LPGEDR | 300 mA, 25 µA IQ, 2.85 V fixed, no active discharge, 6-pin WSON | Same current/noise specs but lacks active discharge; different pinout and thermal pad layout | Choose if board redesign accommodates alternate footprint and discharge is handled externally |
Compared with MCP1700T-285I/OT and TPL7407LPGEDR, the NCP717CMX285TBG uniquely combines 300 mA drive, 22 µVRMS noise, and integrated 120 Ω active discharge in a 1.0×1.0 mm XDFN - enabling compact, robust, and noise-immune power delivery where rapid output discharge and high PSRR are mandatory.
Availability
NCP717CMX285TBG is available at Aetrix Electronics and suitable for GPS receivers, Bluetooth audio systems, portable medical sensors, and industrial wireless transmitters requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for NCP717CMX285TBG 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 engineered for ultra-low-noise, ultra-low-IQ portable power management - targeting battery-powered devices where runtime, EMI performance, and miniaturization are critical design constraints.
FAQ
What is the output voltage tolerance of the NCP717CMX285TBG over temperature and load?
The NCP717CMX285TBG maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, 0–300 mA load, and input voltage range (VIN = VOUT(NOM) + 0.5 V or 2.3 V, whichever is greater). This is confirmed in the Electrical Characteristics table (page 3) under "Output Voltage Accuracy" with test conditions explicitly covering full operational ranges. The NCP717CMX285TBG achieves this via a precision bandgap reference and trimmed error amplifier.
Does the NCP717CMX285TBG require an external capacitor on the EN pin for noise immunity?
No, the NCP717CMX285TBG does not require an external capacitor on the EN pin. Its enable block incorporates built-in 56 mV hysteresis and deglitch timing to reject noise transients, as stated in the Applications Information section (page 13). The internal 180 nA pull-down current source further ensures reliable default-off behavior without external components. Adding capacitance may slow turn-on time unnecessarily. The NCP717CMX285TBG is designed for direct GPIO interfacing.
Can the NCP717CMX285TBG operate with a 1.0 µF ceramic output capacitor, and what ESR is acceptable?
Yes, the NCP717CMX285TBG is fully stable with a 1.0 µF ceramic output capacitor (X5R/X7R), as specified in the Features list and Applications Information (page 13). The datasheet states no minimum ESR requirement but specifies a maximum ESR of 700 mΩ for stability margin. Tantalum capacitors are explicitly discouraged due to high and temperature-dependent ESR. The NCP717CMX285TBG's internal compensation is optimized for low-ESR ceramics.
What is the thermal shutdown behavior of the NCP717CMX285TBG, and does it auto-recover?
The NCP717CMX285TBG triggers thermal shutdown at 160°C (typical) and remains disabled until junction temperature falls to 140°C (typical hysteresis = 20°C), after which it automatically resumes regulation. This behavior is documented in the Electrical Characteristics table (page 3) under "Thermal Shutdown Temperature" and "Thermal Shutdown Hysteresis". The NCP717CMX285TBG implements this via on-die thermal sensing and latched control logic - no external reset is needed.
How does the active output discharge function work in the NCP717CMX285TBG, and what is its resistance value?
The NCP717CMX285TBG's active output discharge activates when EN < 0.4 V, connecting the OUT pin to GND through an internal 120 Ω NMOS transistor (confirmed in Electrical Characteristics table, page 3, "Active Output Discharge Resistance", Version C). This rapidly discharges external output capacitance, preventing residual voltage from interfering with downstream logic or causing shoot-through in multi-rail systems. The NCP717CMX285TBG's C-suffix designation explicitly denotes this 120 Ω discharge version.
NCP717CMX285TBG 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)
NCP717CMX285TBG FAQ
1.How can I place an order for NCP717CMX285TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP717CMX285TBG 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 NCP717CMX285TBG reliable?
The price and inventory of NCP717CMX285TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP717CMX285TBG is usually 5 days.
3.What payment methods are accepted for NCP717CMX285TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP717CMX285TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP717CMX285TBG?
NCP717CMX285TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP717CMX285TBG 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 NCP717CMX285TBG?
For technical support, including NCP717CMX285TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP717CMX285TBG requirements.
6.How does Aetrix verify that NCP717CMX285TBG is sourced from the original manufacturer or authorized distributors?
All NCP717CMX285TBG 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 NCP717CMX285TBG meets industry standards.
7.What is the process for return or replacement of NCP717CMX285TBG?
All NCP717CMX285TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP717CMX285TBG, 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 NCP717CMX285TBG part is unused and in its original packaging.
Return procedure for NCP717CMX285TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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