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onsemi NCP59151DS18R4G
- Part No.:
- NCP59151DS18R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCP59151DS18R4G.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,360
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Product details
Overview
NCP59151DS18R4G from onsemi is a 1.5 A, 1.8 V fixed-output, very low-dropout (VLDO) linear regulator in D2PAK-5 package, featuring 300 mV typical dropout at full load, logic-compatible enable input, and open-collector error flag output. It delivers stable point-of-load power to FPGA core supplies, DSP I/O rails, and post-regulation stages in servers and industrial equipment.
For engineers reviewing the NCP59151DS18R4G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The NCP59151DS18R4G implements a PMOS pass transistor architecture enabling sub-300 mV dropout at 1.5 A while maintaining fast transient response via internal compensation optimized for ceramic output capacitors ≥47 µF. Its feedback loop references an internal 1.24 V bandgap, with output accuracy trimmed to ±2% over −40°C to +125°C.
It integrates CMOS/TTL-compatible enable logic (1.8 V threshold), reverse output current protection during shutdown, thermal shutdown at 125°C, and current limiting at 2.0–3.0 A. The FLG pin asserts low when VOUT drops below 95% of nominal (1.71 V), with 2% hysteresis and 210–400 mV saturation voltage at 1 mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% over full temperature/load range - ensures reliable core voltage for 1.8 V FPGA I/O banks and low-voltage microcontrollers. |
| Max Output Current | 1.5 A continuous - supports high-current digital loads without external current boosting or parallel regulators. |
| Dropout Voltage | 300 mV typical at 1.5 A - enables operation from 2.1 V input (e.g., LiFePO₄ battery or buck converter output), minimizing power loss. |
| Ground Current | 40–80 mA at 1.5 A load - contributes <5% of total input current, improving efficiency vs. older LDOs with >100 mA quiescent draw. |
| Enable Threshold | 1.8 V high-enable / 0.8 V low-disable - interfaces directly with 1.8 V/3.3 V logic without level shifters. |
| Error Flag Accuracy | 95% VOUT low-threshold with 2% hysteresis - provides robust undervoltage detection margin for system reset sequencing. |
| Input Voltage Range | 2.24 V to 13.5 V - accommodates wide-input DC-DC stages and automotive transients up to 18 V absolute max. |
Pinout & Package
D2PAK-5 package (Case 936A) with exposed tab thermally and electrically connected to GND; 5-pin configuration optimized for high-power dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | Thermal Pad / GND | Primary heat path to PCB copper; must be soldered to ≥100 mm² 2 oz Cu ground plane for RJA = 52°C/W. |
| 2 | EN | CMOS/TTL-compatible enable input; pulls regulator into <5 µA shutdown state when ≤0.8 V. |
| 3 | VIN | Main input supply rail; accepts up to 13.5 V operating voltage with internal 18 V absolute max rating. |
| 4 | GND | Power ground reference for internal circuitry and pass element; tied to exposed tab. |
| 5 | VOUT | Regulated 1.8 V output; capable of sourcing 1.5 A with <1.0% load regulation (10 mA–1.5 A). |
Key Features
| Feature | Design Value |
|---|---|
| Stable with ceramic capacitors | Guaranteed stability with ≥47 µF X7R/X5R ceramic output cap - eliminates need for costly tantalum or aluminum electrolytics. |
| Fast transient response | Sub-500 µs startup time and low output impedance maintain <±3% VOUT deviation during 1 A load steps - critical for FPGA dynamic power states. |
| Reverse output current protection | Blocks reverse current flow when VIN = 0 V and VOUT > 0 V (e.g., backup battery scenarios), preventing system-level backfeeding. |
| Integrated fault protection | Combines thermal shutdown, current limit (2–3 A), and error flag - reduces external monitoring circuitry for safety-critical industrial designs. |
| AEC-Q100 qualified variant available | NCV59151DS18R4G offers identical electrical specs with automotive-grade qualification and PPAP support - simplifies dual-sourcing for Tier 1 suppliers. |
Applications
| FPGA Core Power Supply | DSP I/O Rail Regulation |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.8 V to Spartan-7 or Artix-7 FPGA I/O banks during high-speed data transfers. IC Role / Device Role / Timing Role: Low-noise point-of-load regulator with fast load transient response to suppress supply droop during simultaneous I/O switching. Use Value: Maintains <±1.5% VOUT under 1 A step loads, preventing I/O timing violations and bit errors in LVDS/SSTL interfaces. |
Use Scenario: Powering TI C66x DSP I/O pins requiring stable 1.8 V across ambient temperatures from −40°C to +85°C. IC Role / Device Role / Timing Role: Precision voltage reference source with ±2% output accuracy and low ground current to minimize thermal drift. Use Value: Ensures consistent signal integrity and setup/hold margins across temperature, eliminating recalibration in field-deployed systems. |
| Server Memory Buffer Supply | Battery-Powered Industrial Controller |
Use Scenario: Regulating DDR4 memory buffer ICs in 1U rack servers where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: High-current LDO with D2PAK-5 thermal pad enabling 1.5 A delivery in <100 mm² footprint. Use Value: Achieves 52°C/W junction-to-ambient thermal resistance with standard PCB layout - avoids forced-air cooling in dense server modules. |
Use Scenario: Powering ARM Cortex-M7-based controllers in portable test equipment powered by 2S Li-ion (6–8.4 V). IC Role / Device Role / Timing Role: Efficient post-regulator stepping down from buck converter output to precise 1.8 V system rail. Use Value: 300 mV dropout allows operation down to 2.1 V input, extending runtime by >12% vs. legacy 500 mV-dropout LDOs at end-of-battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29150-1.8WU | Same 1.5 A / 1.8 V spec but higher 450 mV dropout at 1.5 A; no error flag; SOT-223 package limits thermal performance. | Lacks FLG pin and enable logic - requires external monitoring circuitry for fault detection in safety-critical systems. | Select when cost sensitivity outweighs need for integrated diagnostics and thermal headroom is sufficient. |
| TPS7A4701RGWR | Lower 1.2 V dropout at 1.5 A, but only 1 A rated; 20 µV RMS noise vs. NCP59151's 45 µV; WQFN-20 package with thermal pad. | Better noise performance suits analog/RF sections, but lower current rating requires derating or paralleling for 1.5 A loads. | Select for mixed-signal applications demanding ultra-low noise, accepting reduced current capacity or added complexity. |
Compared with MIC29150-1.8WU, NCP59151DS18R4G delivers 150 mV lower dropout and integrated fault signaling; versus TPS7A4701RGWR, it trades 25 µV noise reduction for +500 mA current headroom and direct drop-in replacement in D2PAK-5 footprints.
Availability
NCP59151DS18R4G is available at Aetrix Electronics and suitable for FPGA power supplies, DSP I/O regulation, and server memory buffer applications requiring stable component supply, long-term lifecycle support, and automotive-grade alternatives.
Supply support for NCP59151DS18R4G 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 power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP59150 series was designed specifically for high-current, low-noise point-of-load regulation in FPGA, DSP, and ASIC power domains where fast transient response and ceramic capacitor compatibility are mandatory.
FAQ
What is the maximum input voltage rating for NCP59151DS18R4G?
The NCP59151DS18R4G has an absolute maximum input voltage of 18 V, but its recommended operating range is 2.24 V to 13.5 V. Exceeding 13.5 V may trigger internal protection circuits or degrade long-term reliability, even though 18 V is listed as the absolute limit in the datasheet's Absolute Maximum Ratings table.
Does NCP59151DS18R4G require an external resistor divider for output voltage setting?
No, NCP59151DS18R4G is a fixed-output 1.8 V regulator and does not require external resistors. Unlike the adjustable NCP59152 variants, this part uses internal feedback to maintain 1.8 V output - simplifying layout and reducing BOM count compared to adjustable LDOs.
Can NCP59151DS18R4G be used with a 10 µF ceramic output capacitor?
No, NCP59151DS18R4G requires a minimum 47 µF ceramic output capacitor for guaranteed stability and optimal transient response. Using 10 µF violates the datasheet's stability condition and may cause oscillation or excessive overshoot during load steps.
What is the thermal resistance (RJA) of NCP59151DS18R4G in its D2PAK-5 package?
When mounted on a PCB with 100 mm² of 2.0 oz copper heat spreading area, the NCP59151DS18R4G achieves a junction-to-ambient thermal resistance (RJA) of 52°C/W. This value assumes proper soldering of the exposed tab to the ground plane per onsemi's layout guidelines.
Is NCP59151DS18R4G pin-compatible with NCP59151DS25R4G?
Yes, NCP59151DS18R4G and NCP59151DS25R4G share identical D2PAK-5 packaging, pinout, and footprint - differing only in output voltage (1.8 V vs. 2.5 V). This allows direct substitution in existing layouts when adjusting system rail voltages without PCB revision.
NCP59151DS18R4G 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
NCP59151DS18R4G FAQ
1.How can I place an order for NCP59151DS18R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP59151DS18R4G 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 NCP59151DS18R4G reliable?
The price and inventory of NCP59151DS18R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP59151DS18R4G is usually 5 days.
3.What payment methods are accepted for NCP59151DS18R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP59151DS18R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP59151DS18R4G?
NCP59151DS18R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP59151DS18R4G 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 NCP59151DS18R4G?
For technical support, including NCP59151DS18R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP59151DS18R4G requirements.
6.How does Aetrix verify that NCP59151DS18R4G is sourced from the original manufacturer or authorized distributors?
All NCP59151DS18R4G 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 NCP59151DS18R4G meets industry standards.
7.What is the process for return or replacement of NCP59151DS18R4G?
All NCP59151DS18R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP59151DS18R4G, 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 NCP59151DS18R4G part is unused and in its original packaging.
Return procedure for NCP59151DS18R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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