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onsemi NCP3335AMN250R2G
- Part No.:
- NCP3335AMN250R2G
- Manufacturer:
- onsemi
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
NCP3335AMN250R2G.pdf
- Description:
- IC REG LINEAR 2.5V 500MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,947
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Product details
Overview
NCP3335AMN250R2G from onsemi is a fixed-output 2.5 V, 500 mA ultra-high-accuracy low-dropout regulator with ±0.9% output voltage accuracy at 25 °C, 260 mV typical dropout at full load, and 35 µVRMS output noise (with 10 nF CNR). It operates from 2.9 V to 12 V input, requires only 1.0 µF output capacitance for stability, and delivers reverse bias protection up to 7 V - ideal for powering precision analog rails in portable DSP and camera modules.
For engineers reviewing the NCP3335AMN250R2G datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (DFN10, MN suffix), validated thermal performance (θJA = 66 °C/W on 1-pad board), confirmed shutdown threshold (2.0 V ON / 0.4 V OFF), and real-world stability data across MLCC, tantalum, and polymer capacitors.
Technical Context
The NCP3335AMN250R2G implements a PMOS pass transistor architecture enabling ultra-low dropout and zero minimum load requirement. Its internal reference (1.25 V) feeds a high-gain error amplifier that maintains regulation under fast load transients while rejecting ripple up to 70 dB at 1 kHz.
It integrates dedicated NR (noise reduction) and SD (shutdown) pins, supports reverse bias protection via internal isolation circuitry, and features thermal shutdown at 160 °C and current limiting at 900 mA short-circuit peak. Stability is guaranteed with any capacitor type ≥1.0 µF, including low-ESR MLCCs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.9% at 25 °C; ±1.5% over −40 °C to +125 °C - enables direct replacement of legacy 2.5 V LDOs without recalibration. |
| Max Output Current | 500 mA continuous; 800 mA peak - sufficient for powering dual-core microcontrollers or image sensor interfaces. |
| Dropout Voltage | 340 mV at 500 mA (typical); 110 mV at 50 mA - allows operation from 2.9 V input while maintaining 2.5 V output under full load. |
| Ground Current | 9.0 mA at 500 mA load; 0.07 µA in shutdown - minimizes quiescent power loss in battery-backed systems. |
| Output Noise | 35 µVRMS (10 Hz–100 kHz, with 10 nF CNR) - meets low-noise requirements for ADC reference supplies and RF front-end biasing. |
| Input Voltage Range | 2.9 V to 12 V - compatible with single-cell Li-ion (3.0–4.2 V), USB 5 V, and industrial 9–12 V rails. |
| Thermal Shutdown | 160 °C junction temperature - protects against sustained overload in compact PCB layouts. |
Pinout & Package
Package: DFN10 (MN suffix), Case 485C, 3 mm × 3 mm × 0.8 mm, exposed thermal pad (EPAD) - optimized for high-power density and thermal dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Vout | Regulated 2.5 V output; bypass to GND with ≥1.0 µF capacitor - low-impedance power node for sensitive analog loads. |
| 3 | Sense | Output voltage sensing point; connects directly to Pins 1–2 - enables remote-sense compensation for PCB trace IR drop. |
| 4 | GND | Power supply ground reference; must be connected to EPAD - establishes stable return path for feedback and noise control. |
| 5, 6 | NC | No connect - no internal connection; leave floating or tie to GND per layout best practice. |
| 7 | NR | Noise reduction filter pin; accepts 10 nF capacitor to GND - reduces output noise by >30% vs. NR-open configuration. |
| 8 | SD | Active-low shutdown control; <0.4 V = OFF, >2.0 V = ON - enables system-level power sequencing with 0.07 µA shutdown current. |
| 9, 10 | Vin | Input supply (2.9–12 V); decouple with ≥1.0 µF capacitor - handles transient surges and ensures stable regulation during line variation. |
| EPAD | Thermal Pad | Exposed copper pad; must be soldered to GND plane - reduces θJA to 66 °C/W and prevents thermal throttling at full load. |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Stable down to 0 mA output - eliminates need for dummy load resistors in standby modes. |
| Capacitor agnostic stability | Works with 1.0 µF MLCC, tantalum, or polymer capacitors - simplifies BOM and avoids ESR tuning. |
| Reverse bias protection | Blocks >99% current flow from Vout to GND when Vin = 0 V and Vout = 2.5 V - prevents backfeed damage in multi-rail systems. |
| Ultra-low noise with NR pin | 35 µVRMS (vs. 56 µVRMS without CNR) - critical for noise-sensitive PLLs and high-resolution SAR ADCs. |
| Low-quiescent-current shutdown | 0.07 µA shutdown current - extends battery life in always-on sensor nodes and IoT edge devices. |
Applications
| Portable Camera Modules | DSP Power Rails |
|---|---|
Use Scenario: Powering CMOS image sensors and ISP processors in smartphone front/rear cameras where thermal headroom is limited and noise affects image SNR. IC Role / Device Role / Timing Role: Primary 2.5 V analog supply regulator with remote sense capability to compensate for PCB voltage drop between LDO and sensor. Use Value: 35 µVRMS noise and ±0.9% accuracy prevent banding artifacts and color shift; DFN10 package enables placement adjacent to sensor die. |
Use Scenario: Supplying core voltage to low-power DSPs (e.g., TI C5000, ADI SHARC) in audio processing units and voice assistants. IC Role / Device Role / Timing Role: Stable 2.5 V rail for DSP I/O and memory interface, synchronized with system enable signals via SD pin. Use Value: 500 mA current capacity supports burst-mode FFT computation; shutdown current <0.1 µA enables deep-sleep wake-on-voice operation. |
| Industrial PLC I/O Modules | Medical Sensor Front-Ends |
Use Scenario: Regulating 2.5 V reference for 16-bit ADCs and isolated digital I/O in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage source for ADC reference buffer and optocoupler biasing, operating across −40 °C to +85 °C ambient. Use Value: ±1.5% accuracy over full temp range ensures measurement repeatability; reverse bias protection prevents latch-up during field wiring faults. |
Use Scenario: Powering low-noise instrumentation amplifiers and biosignal acquisition circuits (ECG, EEG) in portable diagnostic devices. IC Role / Device Role / Timing Role: Ultra-clean 2.5 V supply for op-amp biasing and ADC reference, decoupled via NR pin and local 10 nF CNR. Use Value: 35 µVRMS noise meets IEC 60601-2-51 ECG noise floor requirements; DFN10 footprint minimizes board area in handheld form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B251MR-G | 2.5 V fixed, 300 mA, ±2% accuracy, 150 mV dropout, no NR pin, no reverse bias protection | Limited to lower-current, cost-sensitive consumer applications; lacks noise-reduction and fault-protection features | Select when budget constraints outweigh noise/robustness needs and load ≤300 mA |
| Analog Devices ADM7172ACPZ-2.5-R7 | 2.5 V fixed, 2 A, ±0.5% accuracy, 120 mV dropout, PSRR >70 dB, but requires 4.7 µF min ceramic cap and no reverse bias protection | Higher current and tighter accuracy, but larger 8-lead LFCSP package and stricter capacitor requirements | Select for high-PSRR, high-current systems where board space and capacitor selection flexibility are less constrained |
Compared with XC6219B251MR-G, NCP3335AMN250R2G delivers 67% higher current and 2.2× better accuracy with integrated fault protection; versus ADM7172ACPZ-2.5-R7, it trades 1.5× higher current for 40% smaller footprint, relaxed capacitor rules, and unique reverse-bias resilience.
Availability
NCP3335AMN250R2G is available at Aetrix Electronics and suitable for portable camera modules, DSP power rails, and industrial PLC I/O requiring stable component supply with full lifecycle support and traceable sourcing.
Supply support for NCP3335AMN250R2G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications - focused on enabling sustainable technology innovation.
The NCP3335A series is designed for high-accuracy, low-noise power management in battery-powered and thermally constrained electronics - emphasizing ultra-low IQ, capacitor flexibility, and robust fault handling.
FAQ
What is the maximum input voltage rating for NCP3335AMN250R2G?
The NCP3335AMN250R2G has an absolute maximum input voltage rating of +16 V, but its recommended operating range is 2.9 V to 12 V. Operation above 12 V may degrade long-term reliability and is not characterized per datasheet specifications. The device includes internal protection against overvoltage stress, but sustained use beyond 12 V is not advised for NCP3335AMN250R2G.
Does NCP3335AMN250R2G require an external capacitor on the NR pin?
Yes - the NR pin of NCP3335AMN250R2G is optional but highly recommended: connecting a 10 nF capacitor from NR to GND reduces output noise from 56 µVRMS to 35 µVRMS. Without the capacitor, NCP3335AMN250R2G remains fully functional but operates at higher noise levels, which may impact precision analog circuits.
Can NCP3335AMN250R2G be used with ceramic capacitors smaller than 1.0 µF?
No - the NCP3335AMN250R2G requires a minimum 1.0 µF output capacitor for guaranteed stability, regardless of type (MLCC, tantalum, or polymer). Using smaller ceramics risks oscillation or poor transient response. The datasheet explicitly validates stability only with ≥1.0 µF, and Figure 27 confirms instability below this threshold for all ESR values.
What is the thermal resistance (θJA) of NCP3335AMN250R2G in its DFN10 package?
The NCP3335AMN250R2G in DFN10 (MN) package achieves θJA = 66 °C/W on a 1-pad board (per JEDEC 51), and 215 °C/W on a min-pad board. This value assumes proper soldering of the EPAD to a solid GND plane - omitting EPAD connection degrades thermal performance by >3× and risks thermal shutdown under 500 mA load.
Is NCP3335AMN250R2G pin-compatible with other variants in the NCP3335A family?
No - NCP3335AMN250R2G uses the DFN10 (10-pin) package, while Micro8 variants (e.g., NCP3335AMX250T2G) use an 8-pin SOIC-style package with different pin count and layout. Though both share identical electrical functionality for the 2.5 V fixed version, they are not mechanically or electrically pin-compatible; PCB redesign is required when switching between MN and MX suffixes.
NCP3335AMN250R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.34V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 190 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
NCP3335AMN250R2G FAQ
1.How can I place an order for NCP3335AMN250R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3335AMN250R2G 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 NCP3335AMN250R2G reliable?
The price and inventory of NCP3335AMN250R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3335AMN250R2G is usually 5 days.
3.What payment methods are accepted for NCP3335AMN250R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3335AMN250R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3335AMN250R2G?
NCP3335AMN250R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3335AMN250R2G 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 NCP3335AMN250R2G?
For technical support, including NCP3335AMN250R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3335AMN250R2G requirements.
6.How does Aetrix verify that NCP3335AMN250R2G is sourced from the original manufacturer or authorized distributors?
All NCP3335AMN250R2G 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 NCP3335AMN250R2G meets industry standards.
7.What is the process for return or replacement of NCP3335AMN250R2G?
All NCP3335AMN250R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3335AMN250R2G, 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 NCP3335AMN250R2G part is unused and in its original packaging.
Return procedure for NCP3335AMN250R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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