Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi NCV59151DS18R4G

Name: NCV59151DS18R4G
Brand: onsemi
SKU: NCV59151DS18R4G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: NCV59151DS18R4G

Manufacturer:: onsemi

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

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

Datasheet:: NCV59151DS18R4G.pdf

Description:: IC REG LINEAR 1.8V 1.5A D2PAK-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,759

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

NCV59151DS18R4G from onsemi is an automotive-grade, fixed-output 1.8 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 and powertrain applications.

For engineers reviewing the NCV59151DS18R4G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-qualified protection features, and two confirmed alternative parts with documented functional trade-offs.

Technical Context

The NCV59151DS18R4G implements a high-precision VLDO architecture with internal reference stability over −40°C to +125°C, enabling stable 1.8 V output under fast load transients up to 1.5 A. Its ground current remains ≤60 mA at full load, supporting efficient thermal management in constrained automotive PCB layouts.

It integrates reverse output current protection, thermal shutdown, and foldback current limiting - critical for powering FPGA I/O banks and microcontroller cores where backup battery scenarios or hot-swap events may reverse VIN–VOUT polarity up to 6.5 V. The error flag asserts low when VOUT drops below 95% of nominal (1.71 V), with 2% hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.8 V ±2.5% (D2PAK package, −40°C to +125°C), suitable for powering 1.8 V FPGA I/O or MCU core rails without external feedback components.
Max Output Current	1.5 A continuous - supports high-current digital loads such as SoC power domains without derating at TJ ≤ 125°C with proper heatsinking.
Dropout Voltage	300 mV typical at 1.5 A - enables operation from 2.1 V input (e.g., degraded 12 V system via buck pre-regulator), minimizing power loss and heat generation.
Ground Current	60 mA max at 1.5 A load - reduces total system quiescent power, critical for always-on automotive modules meeting ISO 16750-2 sleep current requirements.
Enable Threshold	1.8 V min to enable, 0.8 V max to disable - compatible with 1.8 V/3.3 V logic families and allows direct interface to microcontroller GPIOs without level-shifting.
Error Flag Output	Open-collector, sinks ≥1 mA at 210 mV (VFLG(LO)) - drives standard pull-up resistors to monitor VOUT integrity in safety-critical subsystems.
Input Voltage Range	2.24 V to 13.5 V - accommodates wide automotive battery range (cold crank to load dump), with absolute max rating of 18 V for transient robustness.

Pinout & Package

D2PAK-5 package (Case 936A) with exposed tab thermally and electrically connected to GND; requires minimum 100 mm² copper pour for RJA = 52°C/W performance.

Pin/Terminal	Circuit Role	Design Meaning
1 (Tab)	GND	Exposed thermal pad - must be soldered to PCB GND plane for thermal dissipation and EMI reduction; not electrically isolated.
2	EN	CMOS/TTL-compatible enable input - logic high ≥1.8 V activates regulator; low ≤0.8 V places device in ultra-low-IQ shutdown (<5 µA).
3	VIN	Main input supply - accepts up to 13.5 V continuous (18 V absolute max); decoupling capacitor required within 1 inch per datasheet layout guidance.
4	GND	Signal ground reference - connects internally to exposed tab; must be tied to same low-impedance GND plane as VIN and VOUT capacitors.
5	VOUT	Regulated 1.8 V output - capable of sourcing 1.5 A; requires ≥47 µF ceramic output capacitor for stability and transient response per Figure 1.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualified	Validated for −40°C to +125°C junction operation with PPAP capability - meets automotive OEM requirements for engine control, ADAS, and body electronics.
Reverse output current protection	Blocks reverse current flow when VOUT > VIN (up to 6.5 V differential), preventing backup battery discharge in fail-safe power architectures.
Fast transient response	Stabilizes within microseconds after 1 A load step (Figure 22), maintaining <±1% VOUT deviation - essential for powering burst-mode processors and memory interfaces.
Stable with ceramic capacitors	Guaranteed stability with ≥47 µF X7R/X5R ceramic output caps - eliminates need for bulk electrolytic capacitors, reducing board area and improving reliability.
Thermal shutdown with hysteresis	Shuts down at TJ >125°C and restarts only after cooling to ~110°C - prevents thermal runaway during sustained overload or poor heatsinking conditions.

Applications

Automotive Engine Control Unit (ECU)	ADAS Camera Power Module
Use Scenario: Supplies 1.8 V core voltage to ARM Cortex-M7 microcontroller in under-hood ECU exposed to ambient temperatures up to 105°C and battery transients. IC Role / Device Role / Timing Role: Primary post-regulator converting 5 V buck output to clean 1.8 V rail; provides precise voltage tracking and fast transient immunity during injector firing events. Use Value: 300 mV dropout enables operation during cold-crank (6.5 V battery), while AEC-Q100 qualification ensures lifetime reliability across 15-year vehicle service life.	Use Scenario: Powers image signal processor (ISP) and MIPI CSI-2 serializer in rear-view camera module mounted near exhaust manifold. IC Role / Device Role / Timing Role: Low-noise, low-PSRR LDO delivering stable 1.8 V to ISP core; error flag monitors rail integrity during vibration-induced connector micro-disconnects. Use Value: Open-collector FLG output interfaces directly to SoC watchdog, triggering safe mode on VOUT fault; thermal shutdown prevents damage during thermal soak testing.
FPGA I/O Bank Regulator	Industrial PLC Digital I/O Module
Use Scenario: Provides 1.8 V I/O supply to Xilinx Artix-7 FPGA bank driving LVDS transceivers in factory automation controller. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to FPGA; handles rapid current surges during LVDS toggle without violating setup/hold timing margins. Use Value: Fast transient response limits VOUT dip to <18 mV (1% of 1.8 V), preserving signal integrity on high-speed serial links operating at 1+ Gbps.	Use Scenario: Supplies 1.8 V logic rail to isolated digital input ASIC in DIN-rail mounted PLC handling 24 V DC field inputs. IC Role / Device Role / Timing Role: Secondary regulator fed from isolated 5 V DC-DC converter; enables low-power sleep mode via EN pin during network idle periods. Use Value: Shutdown IQ <5 µA extends battery backup runtime during AC power loss; reverse current protection prevents backfeed into isolation barrier during maintenance.

Automotive Engine Control Unit (ECU)

ADAS Camera Power Module

Use Scenario: Supplies 1.8 V core voltage to ARM Cortex-M7 microcontroller in under-hood ECU exposed to ambient temperatures up to 105°C and battery transients.

IC Role / Device Role / Timing Role: Primary post-regulator converting 5 V buck output to clean 1.8 V rail; provides precise voltage tracking and fast transient immunity during injector firing events.

Use Value: 300 mV dropout enables operation during cold-crank (6.5 V battery), while AEC-Q100 qualification ensures lifetime reliability across 15-year vehicle service life.

Use Scenario: Powers image signal processor (ISP) and MIPI CSI-2 serializer in rear-view camera module mounted near exhaust manifold.

IC Role / Device Role / Timing Role: Low-noise, low-PSRR LDO delivering stable 1.8 V to ISP core; error flag monitors rail integrity during vibration-induced connector micro-disconnects.

Use Value: Open-collector FLG output interfaces directly to SoC watchdog, triggering safe mode on VOUT fault; thermal shutdown prevents damage during thermal soak testing.

FPGA I/O Bank Regulator

Industrial PLC Digital I/O Module

Use Scenario: Provides 1.8 V I/O supply to Xilinx Artix-7 FPGA bank driving LVDS transceivers in factory automation controller.

IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to FPGA; handles rapid current surges during LVDS toggle without violating setup/hold timing margins.

Use Value: Fast transient response limits VOUT dip to <18 mV (1% of 1.8 V), preserving signal integrity on high-speed serial links operating at 1+ Gbps.

Use Scenario: Supplies 1.8 V logic rail to isolated digital input ASIC in DIN-rail mounted PLC handling 24 V DC field inputs.

IC Role / Device Role / Timing Role: Secondary regulator fed from isolated 5 V DC-DC converter; enables low-power sleep mode via EN pin during network idle periods.

Use Value: Shutdown IQ <5 µA extends battery backup runtime during AC power loss; reverse current protection prevents backfeed into isolation barrier during maintenance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NCV59151MN18TYG	Same electrical specs but in DFN8-4x4 package (RJA = 75°C/W vs. 52°C/W); no exposed tab - requires larger PCB copper area for equivalent thermal performance.	Better suited for space-constrained, multi-layer boards with dedicated thermal vias; less ideal for high-ambient, single-layer automotive harness modules.	Select when board real estate is limited and thermal design includes ≥500 mm² 2 oz copper with thermal vias to internal GND planes.
NCV8170ASN180T1G	Lower IQ (25 µA vs. 60 mA at full load), 1 A max output, 400 mV dropout at 1 A - trades current capability and dropout for ultra-low quiescent power.	Targeted at always-on telematics modules requiring <100 µA sleep current; insufficient for 1.5 A FPGA or SoC core loads.	Select only for low-duty-cycle sensor nodes or wake-on-RF applications where peak current never exceeds 1 A and dropout margin >400 mV is acceptable.

Compared with NCV59151DS18R4G, NCV59151MN18TYG offers identical regulation performance in a smaller footprint but demands more aggressive PCB thermal design, while NCV8170ASN180T1G sacrifices output current and dropout to achieve microamp-level standby consumption - neither is pin-compatible, and both require layout revision.

Availability

NCV59151DS18R4G is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, FPGA power supplies, and industrial PLC I/O designs requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.

Supply support for NCV59151DS18R4G 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.

The NCV59150 series was designed specifically for automotive power management - delivering high-current, low-dropout regulation with integrated fault monitoring and AEC-Q100 validation for mission-critical vehicle subsystems.

FAQ

What is the maximum input voltage rating for NCV59151DS18R4G?

The NCV59151DS18R4G has an absolute maximum input voltage of 18 V, but its recommended operating range is 2.24 V to 13.5 V. Operation above 13.5 V is permitted only for short-duration transients (e.g., ISO 7637-2 pulse 1 or 5a), and sustained operation beyond 13.5 V risks exceeding thermal limits or degrading long-term reliability. The NCV59151DS18R4G must be used within these boundaries to maintain AEC-Q100 qualification integrity.

Does NCV59151DS18R4G require an external output capacitor, and what type is recommended?

Yes, the NCV59151DS18R4G requires a minimum 47 µF ceramic output capacitor (X7R or X5R dielectric) placed as close as possible to the VOUT and GND pins. This capacitor ensures stability, improves load transient response, and reduces high-frequency noise. Electrolytic or tantalum capacitors are not recommended due to higher ESR, which can degrade phase margin and cause oscillation. The NCV59151DS18R4G is explicitly characterized and guaranteed stable only with ceramic output capacitance.

How does the error flag (FLG) function on NCV59151DS18R4G?

The NCV59151DS18R4G does not include an error flag pin - it is a fixed-voltage 5-pin D2PAK device with pins EN, VIN, GND, VOUT, and Tab/GND. The FLG pin is present only on 5-pin D2PAK variants designated with "FLG" in the ordering code (e.g., NCP59151DS25R4G with FLG), not on the DS18R4G variant. The NCV59151DS18R4G relies solely on enable control and internal protection circuits; fault monitoring must be implemented externally if required.

Is NCV59151DS18R4G pin-compatible with MIC29150-1.8WT or MIC39150-1.8WS?

No, the NCV59151DS18R4G is not pin-compatible with MIC29150-1.8WT or MIC39150-1.8WS. While all three are 1.8 V, 1.5 A LDOs in TO-263 (D2PAK) packages, their pinouts differ: MIC29150 uses VIN–GND–VOUT–EN–TAB, whereas NCV59151DS18R4G uses EN–VIN–GND–VOUT–TAB. Swapping them without PCB revision will result in incorrect enable logic, reversed input/output connections, and potential damage. The NCV59151DS18R4G is a functional replacement only - not a drop-in substitute.

What thermal performance can be expected from NCV59151DS18R4G on a standard 2-layer PCB?

On a standard 2-layer PCB with 100 mm² of 2 oz copper connected to the exposed tab, the NCV59151DS18R4G achieves RJA = 52°C/W. At 1.5 A load with 3.0 V input (1.2 V dropout), power dissipation is 1.8 W; ambient temperature rise would be ~94°C, pushing junction temperature near 125°C limit. For reliable operation, reduce input voltage (e.g., use 2.5 V pre-regulator), add thermal vias to inner layers, or increase copper area. The NCV59151DS18R4G's thermal performance is highly layout-dependent and must be validated per actual board construction.

NCV59151DS18R4G 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):: 1.8V

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

NCV59151DS18R4G FAQ

1.How can I place an order for NCV59151DS18R4G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCV59151DS18R4G 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 NCV59151DS18R4G reliable?

The price and inventory of NCV59151DS18R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV59151DS18R4G is usually 5 days.

3.What payment methods are accepted for NCV59151DS18R4G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV59151DS18R4G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCV59151DS18R4G?

NCV59151DS18R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCV59151DS18R4G 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 NCV59151DS18R4G?

For technical support, including NCV59151DS18R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV59151DS18R4G requirements.

6.How does Aetrix verify that NCV59151DS18R4G is sourced from the original manufacturer or authorized distributors?

All NCV59151DS18R4G 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 NCV59151DS18R4G meets industry standards.

7.What is the process for return or replacement of NCV59151DS18R4G?

All NCV59151DS18R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV59151DS18R4G, 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 NCV59151DS18R4G part is unused and in its original packaging.

Return procedure for NCV59151DS18R4G:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…