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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi NCP3337MN250R2G

Name: NCP3337MN250R2G
Brand: onsemi
SKU: NCP3337MN250R2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP3337MN250R2G

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: NCP3337MN250R2G.pdf

Description:: IC REG LINEAR 2.5V 500MA 10DFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP3337MN250R2G from onsemi is a 2.5 V fixed-output, 500 mA ultra-high-accuracy low-dropout (LDO) regulator with ±0.9% output voltage accuracy at 25 °C, 260 mV typical dropout at full load, and integrated Power Good output. It features reverse bias protection, no minimum load requirement for stability, and supports any capacitor type-including MLCC-as low as 1.0 µF. It is used in DSP supply rails and portable networking systems where precision, low noise, and thermal robustness are critical.

For engineers reviewing the NCP3337MN250R2G datasheet, pinout, applications, or equivalent options, key selection considerations include its 2.5 V fixed output, DFN10 package with exposed pad, ±0.9% initial accuracy, 33 µVrms output noise (with C_NR), and Power Good threshold at 93–99% of V_OUT.

Technical Context

The NCP3337MN250R2G implements a high-gain error amplifier with a precision 1.25 V internal reference to achieve ±0.9% output accuracy over line, load, and temperature. Its series pass element includes reverse bias protection that limits reverse current to ≤10 µA when V_OUT − V_IN ≤ 7 V, enabling safe operation during input brownout or hot-swap scenarios.

Stability is guaranteed across all capacitor types (including low-ESR MLCCs) without requiring minimum ESR or minimum load current. The NR pin accepts a 10 nF capacitor to reduce output noise by ~30 µVrms, while the PWRG pin provides open-drain logic-level status with 50 µs blanking time and 200 mV saturation voltage under 1 mA sink.

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 - ensures stable core voltage for DSPs and low-voltage logic.
Max Output Current	500 mA continuous, 800 mA peak - supports burst-mode loads in portable networking equipment.
Dropout Voltage	340 mV at 500 mA (typical) - enables operation from 2.9 V input, suitable for single-cell Li-ion or 3.3 V rail derivation.
Ground Current	9 mA at 500 mA load, 1 µA in shutdown - minimizes quiescent power loss in battery-backed systems.
Output Noise	56 µVrms (no C_NR), 35 µVrms (with 10 nF C_NR) - meets low-noise requirements for analog/RF subsystems.
Power Good Threshold	93–99% of V_OUT with 2% hysteresis - provides reliable system reset signaling without external comparators.
Input Voltage Range	2.9 V to 12 V - compatible with wide-input industrial and consumer power architectures.

Pinout & Package

Package: DFN10 (3 mm × 3 mm, 0.5 mm pitch), Case 485C, with exposed thermal pad (EPAD) connected to GND for enhanced thermal performance (θ_JA = 66 °C/W on 2 oz copper).

Pin/Terminal	Circuit Role	Design Meaning
1, 2 - V_OUT	Regulated output	Delivers 2.5 V to load; bypassed with ≥1.0 µF capacitor directly at pins for stability and transient response.
3 - SENSE/ADJ	Feedback node	Internally tied to V_OUT for fixed 2.5 V operation; not user-adjustable in this variant.
4 - GND	Power ground	Primary return path; must be connected to EPAD for optimal thermal and noise performance.
5 - PWRG	Open-drain Power Good	Asserts low when V_OUT drops below 93% of nominal; requires external 100 kΩ pull-up to V_IN.
6 - NC	No connect	Not bonded; must remain unconnected per datasheet to avoid malfunction.
7 - NR	Noise reduction	Accepts 10 nF capacitor to ground to reduce output noise by ~21 µVrms; optional for non-critical applications.
8 - SD	Shutdown control	Active-low enable; <0.4 V disables regulator (I_Q < 1 µA); >2.0 V enables operation.
9, 10 - V_IN	Input supply	Accepts 2.9–12 V; requires ≥1.0 µF input capacitor placed close to pins to suppress high-frequency ripple.
EPAD - GND	Thermal & electrical ground	Exposed pad must be soldered to large GND copper area to maintain T_J ≤ 150 °C at full load.

Key Features

Feature	Design Value
No minimum load required	Stable down to 0 mA output current - eliminates need for dummy loads in standby or low-power modes.
Reverse bias protection	Blocks >99.9% of reverse current (≤10 µA) when V_OUT > V_IN by up to 7 V - prevents damage during hot-swap or backup-capacitor discharge.
Capacitor agnostic stability	Works with any capacitor chemistry (MLCC, tantalum, polymer) ≥1.0 µF and 0–5 Ω ESR - simplifies BOM and layout.
Ultra-low noise with NR pin	Reduces broadband noise from 56 µVrms to 35 µVrms using 10 nF C_NR - enables clean supply for ADCs and RF ICs.
Integrated thermal shutdown	Triggers at 160 °C with 10 °C hysteresis - protects against sustained overload without external circuitry.

Applications

DSP Power Supply	DSL/Cable Modem Core Rail
Use Scenario: Powers 2.5 V I/O or core voltage of digital signal processors in portable audio analyzers and telecom edge devices. IC Role / Device Role / Timing Role: Primary post-regulator delivering tightly regulated, low-noise 2.5 V from a higher intermediate rail. Use Value: ±0.9% accuracy and 35 µVrms noise ensure consistent ADC sampling and jitter-free serial interface timing.	Use Scenario: Supplies 2.5 V logic and PHY interfaces in DSLAM line cards and cable modem termination systems. IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA configuration banks and Ethernet PHY transceivers. Use Value: Reverse bias protection prevents latch-up during upstream power cycling; Power Good enables synchronized firmware boot.
Camcorder Image Sensor Bias	Industrial Display Controller
Use Scenario: Provides clean 2.5 V bias to CMOS image sensor analog front-ends in professional camcorders. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital domains via NR pin filtering. Use Value: 35 µVrms noise (with C_NR) reduces fixed-pattern noise and improves SNR in 12-bit image capture.	Use Scenario: Regulates 2.5 V for display timing controllers and LVDS transmitter ICs in medical and factory HMIs. IC Role / Device Role / Timing Role: Stable voltage reference source for pixel clock generation and gamma correction DACs. Use Value: 260 mV dropout enables use with aging 3.3 V supplies; thermal shutdown prevents field failures in sealed enclosures.

DSP Power Supply

DSL/Cable Modem Core Rail

Use Scenario: Powers 2.5 V I/O or core voltage of digital signal processors in portable audio analyzers and telecom edge devices.

IC Role / Device Role / Timing Role: Primary post-regulator delivering tightly regulated, low-noise 2.5 V from a higher intermediate rail.

Use Value: ±0.9% accuracy and 35 µVrms noise ensure consistent ADC sampling and jitter-free serial interface timing.

Use Scenario: Supplies 2.5 V logic and PHY interfaces in DSLAM line cards and cable modem termination systems.

IC Role / Device Role / Timing Role: Point-of-load regulator for FPGA configuration banks and Ethernet PHY transceivers.

Use Value: Reverse bias protection prevents latch-up during upstream power cycling; Power Good enables synchronized firmware boot.

Camcorder Image Sensor Bias

Industrial Display Controller

Use Scenario: Provides clean 2.5 V bias to CMOS image sensor analog front-ends in professional camcorders.

IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital domains via NR pin filtering.

Use Value: 35 µVrms noise (with C_NR) reduces fixed-pattern noise and improves SNR in 12-bit image capture.

Use Scenario: Regulates 2.5 V for display timing controllers and LVDS transmitter ICs in medical and factory HMIs.

IC Role / Device Role / Timing Role: Stable voltage reference source for pixel clock generation and gamma correction DACs.

Use Value: 260 mV dropout enables use with aging 3.3 V supplies; thermal shutdown prevents field failures in sealed enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS7A2025PDQNR	2.5 V fixed, 300 mA, ±1.5% accuracy, 165 mV dropout, no Power Good or NR pin	Lacks PWRG and NR functionality; lower current rating limits use in burst-load systems	Select when footprint compatibility and ultra-low IQ (6.5 µA) outweigh need for Power Good signaling and noise reduction.
MCP1703T-2502E/MB	2.5 V fixed, 250 mA, ±2% accuracy, 600 mV dropout, no reverse bias protection	Higher dropout and no reverse bias protection restrict use in low-V_IN or hot-swap designs	Choose for cost-sensitive, low-current applications where thermal margin is ample and input sequencing is controlled.

Compared with TPS7A2025PDQNR and MCP1703T-2502E/MB, the NCP3337MN250R2G uniquely combines 500 mA capability, ±0.9% accuracy, Power Good output, and reverse bias protection in a thermally optimized DFN10 package-making it optimal for high-reliability, multi-rail embedded systems.

Availability

NCP3337MN250R2G is available at Aetrix Electronics and suitable for DSP supply, DSL/cable modem core rail, and industrial display controller applications requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP3337MN250R2G 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 focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.

The NCP3337 series was designed specifically for high-accuracy, low-noise, and thermally robust LDO regulation in portable and networking equipment-emphasizing stability with ceramic capacitors and protection against real-world fault conditions like reverse bias.

FAQ

What is the output voltage tolerance of the NCP3337MN250R2G across temperature?

The NCP3337MN250R2G delivers 2.5 V with ±1.5% tolerance over −40 °C to +125 °C, verified per Electrical Characteristics Table on page 7 of the datasheet. At 25 °C, accuracy tightens to ±0.9%, and load/line regulation contribute only ±0.04 mV/mA and ±0.04 mV/V respectively - ensuring minimal drift in DSP and display controller applications.

Does the NCP3337MN250R2G require an external resistor divider for 2.5 V operation?

No. The NCP3337MN250R2G is a fixed-output variant with internal feedback; Pin 3 (SENSE/ADJ) is internally connected to V_OUT. Unlike the adjustable NCP3337MNADJR2G, no external resistors are needed - simplifying layout and eliminating resistor tolerance errors in the NCP3337MN250R2G design.

How does the Power Good function behave during thermal shutdown in the NCP3337MN250R2G?

The Power Good (PWRG) pin on the NCP3337MN250R2G is disabled during thermal shutdown and shutdown mode - it neither asserts high nor low but enters high-impedance state. This behavior is explicitly stated in the Applications Information section (page 14), preventing false system resets during overtemperature events.

Can the NCP3337MN250R2G operate stably with a 0.47 µF MLCC output capacitor?

No. The NCP3337MN250R2G requires a minimum 1.0 µF output capacitance for guaranteed stability, as specified in the datasheet (page 1). While some MLCCs may appear stable at lower values under specific conditions, the 1.0 µF minimum applies to all capacitor types - including MLCC - and is validated across temperature, load, and input voltage ranges for the NCP3337MN250R2G.

What is the maximum junction temperature and thermal resistance for the NCP3337MN250R2G in its DFN10 package?

The NCP3337MN250R2G has a maximum junction temperature (T_J) of +150 °C and a typical junction-to-air thermal resistance (θ_JA) of 66 °C/W when mounted on a 2 oz copper PCB per JEDEC 51 standards (page 4). Exceeding T_J triggers thermal shutdown at 160 °C, protecting the NCP3337MN250R2G during sustained overload or poor heatsinking.

NCP3337MN250R2G 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):: 12V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.34V @ 500mA

Current - Output:: 500mA

Current - Quiescent (Iq):: 220 µA

Current - Supply (Max):: 14 mA

PSRR:: -

Control Features:: Enable, Power Good

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-DFN (3x3)

NCP3337MN250R2G FAQ

1.How can I place an order for NCP3337MN250R2G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP3337MN250R2G 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 NCP3337MN250R2G reliable?

The price and inventory of NCP3337MN250R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3337MN250R2G is usually 5 days.

3.What payment methods are accepted for NCP3337MN250R2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3337MN250R2G transactions.

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4.How is shipping managed for NCP3337MN250R2G?

NCP3337MN250R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP3337MN250R2G 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 NCP3337MN250R2G?

For technical support, including NCP3337MN250R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3337MN250R2G requirements.

6.How does Aetrix verify that NCP3337MN250R2G is sourced from the original manufacturer or authorized distributors?

All NCP3337MN250R2G 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 NCP3337MN250R2G meets industry standards.

7.What is the process for return or replacement of NCP3337MN250R2G?

All NCP3337MN250R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3337MN250R2G, 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 NCP3337MN250R2G part is unused and in its original packaging.

Return procedure for NCP3337MN250R2G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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