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

onsemi NCV59151DS25R4G

Name: NCV59151DS25R4G
Brand: onsemi
SKU: NCV59151DS25R4G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCV59151DS25R4G

Manufacturer:: onsemi

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

Package:: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA

Datasheet:: NCV59151DS25R4G.pdf

Description:: IC REG LINEAR 2.5V 1.5A D2PAK-5

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Product details

Overview

NCV59151DS25R4G from onsemi is an automotive-grade, fixed-output 2.5 V, 1.5 A very low-dropout (VLDO) linear regulator in D2PAK-5 package, featuring 300 mV typical dropout at full load, logic-compatible enable input, open-collector error flag, and AEC-Q100 qualification for under-hood power management in FPGA/DSP point-of-load applications.

For engineers reviewing the NCV59151DS25R4G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive thermal and protection behavior, and two confirmed alternative parts with functional and packaging distinctions.

Technical Context

The NCV59151DS25R4G implements a high-precision VLDO architecture with internal reference trimmed to ±1.5% output voltage accuracy over −40°C to +125°C, fast transient response enabled by ceramic-capacitor stability (≥47 µF), and integrated reverse output current protection during shutdown when V_OUT–V_IN ≤ 6.5 V.

Its control loop supports stable operation with low-ESR ceramic output capacitors only-no tantalum or electrolytic required-and incorporates CMOS/TTL-compatible enable logic (1.8 V threshold) plus an active-low open-collector flag that asserts below 95% of nominal V_OUT with 2% hysteresis, enabling reliable fault detection in safety-critical systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5 V ±2.5% over full temperature/load range-ensures tight regulation for 2.5 V FPGA I/O or DSP core rails without external feedback components.
Dropout Voltage	300 mV typical at 1.5 A load-enables operation from 2.75 V input while maintaining 2.5 V output, critical for battery-backed or post-regulation systems.
Ground Current	40–80 mA at 1.5 A load-directly impacts system efficiency and thermal budget; lower than legacy MIC29150 (≈120 mA), reducing PCB heat dissipation.
Enable Threshold	1.8 V high / 0.8 V low-fully compatible with 3.3 V and 1.8 V logic families without level-shifting, simplifying host controller interface.
Error Flag	Active-low open-collector, 210–500 mV saturation at 1 mA-supports direct connection to microcontroller GPIO with pull-up, eliminating need for external comparator.
Thermal Protection	Internal shutdown at +125°C junction-prevents catastrophic failure during overload or poor heatsinking; auto-recovery on cooldown.
Input Voltage Range	2.24 V to 13.5 V-covers 3.3 V, 5 V, and 12 V supply rails, including automotive battery transients up to 18 V absolute max (non-operational).

Pinout & Package

D2PAK-5 (Case 936A) package with exposed tab thermally and electrically connected to GND; 5-pin configuration optimized for high-current thermal performance on standard PCB copper pours.

Pin/Terminal	Circuit Role	Design Meaning
1	EN	CMOS/TTL-compatible enable input; logic high ≥1.8 V enables regulator, low ≤0.8 V places device in ultra-low-I_Q shutdown (≤5 µA).
2	VIN	Main input supply pin; accepts 2.24–13.5 V; must be decoupled with ≥1 µF ceramic capacitor within 1 inch of pin.
3	GND	Power ground reference; connects internally to exposed tab-must be soldered to ≥100 mm² 2 oz copper for R_JA = 52°C/W.
4	VOUT	Regulated 2.5 V output; requires ≥47 µF ceramic capacitor at pin for stability and transient response.
5	FLG	Open-collector error flag; sinks up to 5 mA when V_OUT drops below 95% of nominal; pulled high externally to monitor fault condition.

Key Features

Feature	Design Value
AEC-Q100 Qualified	Rated for automotive applications (Grade 1: −40°C to +125°C), PPAP-capable, with unique site/control change tracking via NCV prefix.
Ceramic-Capacitor Stable	No ESR requirements-enables use of small, reliable, long-life 47 µF X5R/X7R MLCCs instead of bulkier, aging-prone tantalum capacitors.
Reverse Output Current Protection	Blocks reverse current flow from V_OUT to VIN during shutdown when V_OUT–V_IN ≤ 6.5 V-essential for backup battery or hot-swap scenarios.
Fast Transient Response	Sub-500 µs startup time and low output impedance maintain <±30 mV droop during 10–90% load steps up to 1.5 A-critical for FPGA core sequencing.
Integrated Protection	Combines current limiting (2.0–3.0 A), thermal shutdown, and reverse current blocking-reduces BOM count vs. discrete protection circuits.

Applications

Automotive Engine Control Unit (ECU)	FPGA I/O Power Supply
Use Scenario: Regulating 2.5 V rail for CAN transceiver interfaces and sensor signal conditioning in under-hood ECUs exposed to −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, stable 2.5 V from switched 5 V or 12 V bus; provides EN-controlled power sequencing and FLG-based fault reporting to MCU. Use Value: AEC-Q100 qualification ensures reliability across automotive lifecycle; 300 mV dropout allows operation during cold-crank (6.5 V battery dip) without brownout.	Use Scenario: Supplying configurable I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs requiring precise 2.5 V with fast load-step response. IC Role / Device Role / Timing Role: Point-of-load LDO providing low-noise, low-ripple 2.5 V; EN pin synchronized to FPGA configuration state; FLG monitors rail integrity during partial reconfiguration. Use Value: Ceramic-stable design eliminates ESR tuning; 40–80 mA ground current minimizes thermal impact on FPGA thermal pad layout.
Industrial PLC Digital I/O Module	Medical Imaging Sensor Interface
Use Scenario: Powering isolated 2.5 V logic-level translators and ADC drivers in DIN-rail mounted programmable logic controllers operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: Secondary regulator after isolated DC/DC converter; EN controlled by PLC watchdog; FLG tied to diagnostic LED and fault register. Use Value: D2PAK-5 package with exposed tab enables robust thermal management on standard FR4; 13.5 V max input accommodates industrial 24 V bus derating.	Use Scenario: Biasing high-speed analog front-end (AFE) sensors in portable ultrasound or MRI coil modules where EMI-sensitive analog signals require ultra-low-noise supply. IC Role / Device Role / Timing Role: Low-PSRR, low-noise LDO filtering switching noise from upstream DC/DC; FLG alerts system controller if sensor bias drifts beyond tolerance. Use Value: PSRR >60 dB at 100 kHz (per Fig. 17) suppresses high-frequency switching artifacts; ±2.5% accuracy ensures consistent ADC reference scaling.

Automotive Engine Control Unit (ECU)

FPGA I/O Power Supply

Use Scenario: Regulating 2.5 V rail for CAN transceiver interfaces and sensor signal conditioning in under-hood ECUs exposed to −40°C to +125°C ambient.

IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, stable 2.5 V from switched 5 V or 12 V bus; provides EN-controlled power sequencing and FLG-based fault reporting to MCU.

Use Value: AEC-Q100 qualification ensures reliability across automotive lifecycle; 300 mV dropout allows operation during cold-crank (6.5 V battery dip) without brownout.

Use Scenario: Supplying configurable I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs requiring precise 2.5 V with fast load-step response.

IC Role / Device Role / Timing Role: Point-of-load LDO providing low-noise, low-ripple 2.5 V; EN pin synchronized to FPGA configuration state; FLG monitors rail integrity during partial reconfiguration.

Use Value: Ceramic-stable design eliminates ESR tuning; 40–80 mA ground current minimizes thermal impact on FPGA thermal pad layout.

Industrial PLC Digital I/O Module

Medical Imaging Sensor Interface

Use Scenario: Powering isolated 2.5 V logic-level translators and ADC drivers in DIN-rail mounted programmable logic controllers operating continuously at 70°C ambient.

IC Role / Device Role / Timing Role: Secondary regulator after isolated DC/DC converter; EN controlled by PLC watchdog; FLG tied to diagnostic LED and fault register.

Use Value: D2PAK-5 package with exposed tab enables robust thermal management on standard FR4; 13.5 V max input accommodates industrial 24 V bus derating.

Use Scenario: Biasing high-speed analog front-end (AFE) sensors in portable ultrasound or MRI coil modules where EMI-sensitive analog signals require ultra-low-noise supply.

IC Role / Device Role / Timing Role: Low-PSRR, low-noise LDO filtering switching noise from upstream DC/DC; FLG alerts system controller if sensor bias drifts beyond tolerance.

Use Value: PSRR >60 dB at 100 kHz (per Fig. 17) suppresses high-frequency switching artifacts; ±2.5% accuracy ensures consistent ADC reference scaling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NCV59151MN25TYG	Same electrical specs but in DFN8-4×4 (Pb-free) package; R_JA = 75°C/W vs. 52°C/W for D2PAK-5; no exposed tab soldering requirement.	Better suited for space-constrained PCBs where thermal mass is managed via large copper planes; less suitable for high-ambient industrial enclosures without forced air.	Select NCV59151MN25TYG when board area is limited and thermal design uses ≥500 mm² 2 oz copper; choose NCV59151DS25R4G when mechanical robustness, higher current margin, or simplified heatsinking is prioritized.
NCV8664DS25T	2.5 V, 1.5 A LDO with 450 mV typical dropout at 1.5 A; lacks error flag; wider input range (2.7–40 V); different pinout (TO-252-3).	Targeted at 24 V industrial systems with wide input variation; not suitable for low-VIN applications (<2.7 V) or designs requiring fault signaling.	Choose NCV8664DS25T only if input exceeds 13.5 V or flag functionality is unnecessary; NCV59151DS25R4G remains preferred for automotive 12 V systems needing fault visibility and low dropout.

Compared with NCV59151MN25TYG, the NCV59151DS25R4G offers superior thermal resistance (52 vs. 75°C/W) and mechanical ruggedness for high-vibration environments, while NCV8664DS25T trades dropout performance and fault signaling for extended input voltage range-making each alternative situationally optimal but not drop-in replacements.

Availability

NCV59151DS25R4G is available at Aetrix Electronics and suitable for automotive engine control units, FPGA power supplies, industrial PLC modules, and medical imaging sensor interfaces requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.

Supply support for NCV59151DS25R4G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in automotive, industrial, cloud, and IoT power management solutions.

The NCV59151DS25R4G belongs to the NCV59150 series of automotive-qualified VLDO regulators, designed specifically for demanding point-of-load applications in engine bays, ADAS modules, and safety-critical control systems where precision, reliability, and thermal resilience are mandatory.

FAQ

What is the maximum input voltage rating for the NCV59151DS25R4G?

The NCV59151DS25R4G has an absolute maximum input voltage of 18 V, but its recommended operating input voltage range is 2.24 V to 13.5 V. Operation above 13.5 V is not guaranteed and may trigger internal protection circuits or degrade long-term reliability. The 18 V rating applies only to non-operational conditions such as load dump transients in automotive systems.

Does the NCV59151DS25R4G require an external resistor divider for output voltage setting?

No, the NCV59151DS25R4G is a fixed-output 2.5 V regulator and does not require an external resistor divider. Its feedback network is internal; the FLG pin monitors the regulated output directly. Only adjustable variants like NCV59152DSADJR4G use external resistors on the ADJ pin.

How does the error flag (FLG) behave during normal operation and fault conditions?

During normal operation, the FLG pin remains high-impedance (open-collector off). When V_OUT falls below 95% of nominal (2.375 V), FLG actively pulls low with ≤500 mV saturation at 1 mA sink current. It includes 2% hysteresis-releasing only when V_OUT rises above 97% (2.425 V)-to prevent chatter near the threshold. This behavior is fully specified in the Electrical Characteristics table.

Can the NCV59151DS25R4G be used with aluminum polymer or tantalum output capacitors?

No-the NCV59151DS25R4G is explicitly characterized and guaranteed stable only with ceramic output capacitors ≥47 µF. Using aluminum polymer or tantalum capacitors violates the stability criteria defined in the datasheet and may cause oscillation or poor transient response due to ESR dependency. Ceramic MLCCs are mandatory for reliable operation.

What is the thermal resistance (R_JA) of the NCV59151DS25R4G in its D2PAK-5 package?

The NCV59151DS25R4G in D2PAK-5 package has a junction-to-ambient thermal resistance (R_JA) of 52°C/W when mounted on a PCB with 100 mm² of 2.0 oz copper heat-spreading area. This value assumes proper soldering of the exposed tab to the GND plane; inadequate thermal land design will significantly increase R_JA and risk thermal shutdown under full load.

NCV59151DS25R4G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 13.5V

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

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.5V @ 1.5A

Current - Output:: 1.5A

Current - Quiescent (Iq):: -

Current - Supply (Max):: -

PSRR:: -

Control Features:: Enable, Error Flag

Protection Features:: Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK-5

NCV59151DS25R4G FAQ

1.How can I place an order for NCV59151DS25R4G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCV59151DS25R4G 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 NCV59151DS25R4G reliable?

The price and inventory of NCV59151DS25R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV59151DS25R4G is usually 5 days.

3.What payment methods are accepted for NCV59151DS25R4G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV59151DS25R4G transactions.

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4.How is shipping managed for NCV59151DS25R4G?

NCV59151DS25R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCV59151DS25R4G 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 NCV59151DS25R4G?

For technical support, including NCV59151DS25R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV59151DS25R4G requirements.

6.How does Aetrix verify that NCV59151DS25R4G is sourced from the original manufacturer or authorized distributors?

All NCV59151DS25R4G 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 NCV59151DS25R4G meets industry standards.

7.What is the process for return or replacement of NCV59151DS25R4G?

All NCV59151DS25R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV59151DS25R4G, 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 NCV59151DS25R4G part is unused and in its original packaging.

Return procedure for NCV59151DS25R4G:

1.Submit a request within 90 days.

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

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