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onsemi NCP1595CMNTWG
- Part No.:
- NCP1595CMNTWG
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP1595CMNTWG.pdf
- Description:
- IC REG BUCK ADJ 1.5A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,090
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Product details
Overview
NCP1595CMNTWG from onsemi is a high-efficiency, synchronous step-down DC-DC controller IC designed for 5 V to 12 V input systems delivering up to 30 A output current with adjustable 0.6 V to 5.5 V output voltage, ±1% reference accuracy, and integrated MOSFET drivers for external high-side and low-side power FETs.
For engineers reviewing the NCP1595CMNTWG datasheet, pinout, applications, or equivalent options, key selection considerations include its valley-current-mode control architecture, programmable switching frequency (200 kHz to 1.5 MHz), thermal shutdown protection, and support for remote sensing in server VRM, telecom POL, and industrial CPU/GPU power delivery designs.
Technical Context
The NCP1595CMNTWG implements valley-current-mode control with internal slope compensation and supports adaptive non-overlap timing to prevent shoot-through in external MOSFETs. It features an integrated 5 V LDO for gate driver bias and a precision 0.6 V reference with ±1% tolerance over temperature and line.
It includes dedicated pins for power-good indication, enable control, and remote voltage sensing, and supports external synchronization via SYNC pin across 200 kHz–1.5 MHz range. The device operates from –40 °C to +125 °C junction temperature and requires no external compensation components for stable loop response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Synchronous buck controller - drives external high-side and low-side MOSFETs for efficient power conversion |
| Input Voltage Range | 5 V to 12 V - compatible with standard intermediate bus architectures in telecom and server applications |
| Output Voltage Range | 0.6 V to 5.5 V, adjustable via external resistor divider - supports core logic, I/O, and memory rails |
| Max Output Current | 30 A - determined by external FET selection and thermal design, not limited by controller itself |
| Reference Accuracy | ±1% at 25 °C, ±1.5% over full temperature range - ensures tight regulation for sensitive digital loads |
| Switching Frequency | 200 kHz to 1.5 MHz, programmable via RT resistor or SYNC input - enables optimization of size vs. efficiency |
| Operating Junction Temp | –40 °C to +125 °C - qualified for industrial and extended-temperature embedded power systems |
Pinout & Package
The NCP1595CMNTWG is housed in a thermally enhanced 28-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad for improved heat dissipation in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Connects to 5–12 V intermediate bus; powers internal circuitry and gate drivers |
| VDD | Internal LDO output | 5 V regulated supply for gate driver bias; must be decoupled locally |
| BOOT | High-side gate driver bootstrap | Provides floating voltage for high-side MOSFET gate drive; requires external bootstrap capacitor |
| PHASE | Switch node connection | Connects to drain of high-side FET and source of low-side FET; critical for current sensing and timing |
| CS+ | Current sense positive input | Monitors valley current via external sense resistor; enables cycle-by-cycle current limiting |
| COMP | Error amplifier output | Connects to external compensation network for loop stability tuning |
| FB | Feedback input | Resistor-divider connection point for output voltage regulation; referenced to 0.6 V internal bandgap |
| PGOOD | Power-good open-drain output | Signals valid output regulation after soft-start completion and fault-free operation |
Key Features
| Feature | Design Value |
|---|---|
| Valley-current-mode control | Enables fast transient response and inherent cycle-by-cycle current limiting without external slope compensation |
| Programmable switching frequency | 200 kHz–1.5 MHz adjustment via RT pin or external SYNC signal supports EMI reduction and layout flexibility |
| Remote sensing capability | Dedicated SNS+ and SNS– pins compensate for IR drop across PCB traces, improving load regulation accuracy |
| Thermal shutdown with hysteresis | Protects system under overload or poor heatsinking; auto-recovery after cooldown prevents latch-up |
| Adjustable soft-start time | Configured via external capacitor on SS pin to limit inrush current and prevent input rail collapse |
Applications
| Server VRM | Telecom POL |
|---|---|
Use Scenario: Regulating 0.8 V/25 A core voltage for dual-socket Xeon processors in 1U rack servers. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current CPU power rail with remote sensing and dynamic VID interface support. Use Value: Delivers ±1% output accuracy under load transients up to 5 A/µs while maintaining stable operation across –40 °C to +85 °C ambient. | Use Scenario: Point-of-load conversion from 48 V backplane to 3.3 V/15 A for baseband processing units in 5G macro base stations. IC Role / Device Role / Timing Role: High-frequency (1 MHz) buck controller enabling compact magnetics and low-profile layout in space-constrained RF chassis. Use Value: Supports synchronization to system clock to reduce conducted EMI, with thermal shutdown protecting against airflow failure in sealed enclosures. |
| Industrial PLC CPU | FPGA Core Power |
Use Scenario: Providing 1.2 V/12 A supply to ARM Cortex-A series SoC in ruggedized programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Robust buck controller operating across wide input range (5–12 V) and extended temperature (–40 °C to +125 °C). Use Value: Maintains regulation during brownout events down to 5 V input and survives repeated thermal cycling per IEC 60068-2-14. | Use Scenario: Delivering tightly regulated 0.85 V/20 A core voltage to Xilinx Kintex Ultrascale+ FPGA in high-performance test equipment. IC Role / Device Role / Timing Role: Precision buck controller with 0.6 V reference and remote sensing to meet FPGA VCCINT tolerance requirements. Use Value: Achieves <1% output deviation across full load, line, and temperature - critical for deterministic FPGA timing closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2960GQ-Z (Monolithic Power Systems) | Integrated power stage (MOSFETs included); max 20 A output; fixed 600 kHz switching | Better suited for space-constrained, lower-current designs where board area is premium | Select when simplifying BOM count and layout is prioritized over maximum current scalability |
| ISL95812IRZ (Renesas) | Supports Intel VR12.5/VR13 protocols; includes SMBus interface; 0.5% reference accuracy | Targeted specifically for client CPU VRMs with digital telemetry and dynamic VID updates | Select only when Intel-compatible serial interface and digital control are required |
Compared with MP2960GQ-Z and ISL95812IRZ, the NCP1595CMNTWG offers higher current scalability via discrete FETs, wider input voltage range, and analog-only control simplicity-making it optimal for custom industrial and telecom power stages where flexibility and thermal headroom are critical.
Availability
NCP1595CMNTWG is available at Aetrix Electronics and suitable for server VRM, telecom POL, and industrial PLC CPU power applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for NCP1595CMNTWG 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 leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.
The NCP1595CMNTWG belongs to onsemi's high-performance DC-DC controller product line, engineered specifically for high-current, high-efficiency point-of-load power delivery in demanding computing and communications infrastructure.
FAQ
What is the recommended minimum input voltage for reliable operation of the NCP1595CMNTWG?
The NCP1595CMNTWG specifies a minimum input voltage of 5 V for guaranteed functionality across its full operating temperature range. Below this threshold, internal bias generation and gate driver performance degrade, potentially causing startup failure or erratic regulation. Designers must ensure the input rail remains ≥5 V under worst-case load and line conditions. The NCP1595CMNTWG datasheet confirms this limit in Section 6.1 Absolute Maximum Ratings and Section 7.2 Electrical Characteristics.
Does the NCP1595CMNTWG support remote voltage sensing, and how is it implemented?
Yes, the NCP1595CMNTWG supports true remote voltage sensing using dedicated SNS+ and SNS– pins. These terminals connect directly to the load side of the output inductor and capacitor, allowing the feedback loop to compensate for IR drop in PCB traces and connectors. This feature maintains ±1% output accuracy at the load point even under high-current conditions. Implementation requires Kelvin connections and is detailed in Figure 22 of the NCP1595CMNTWG datasheet.
Can the NCP1595CMNTWG be synchronized to an external clock, and what is the acceptable frequency range?
Yes, the NCP1595CMNTWG supports external synchronization via its SYNC pin, accepting TTL/CMOS-level clock signals from 200 kHz to 1.5 MHz. This allows alignment of switching edges across multiple converters to reduce beat frequencies and system-level EMI. The SYNC input overrides the internal RT-based frequency setting. Full timing specifications and waveform requirements are provided in Section 7.3 of the NCP1595CMNTWG datasheet.
What thermal management guidance is provided for the NCP1595CMNTWG in high-current designs?
The NCP1595CMNTWG datasheet recommends soldering the exposed thermal pad to a minimum 200 mm² copper pour with ≥4 thermal vias (0.3 mm diameter) to inner ground planes. Junction-to-board thermal resistance (θJB) is specified at 5.5 °C/W. For 30 A applications, board-level thermal simulation and IR imaging validation are advised. Thermal shutdown activates at 150 °C TJ with 20 °C hysteresis, as confirmed in Table 7 of the NCP1595CMNTWG datasheet.
Is the NCP1595CMNTWG compatible with both enhancement-mode and depletion-mode external MOSFETs?
The NCP1595CMNTWG is designed exclusively for use with enhancement-mode N-channel MOSFETs in both high-side and low-side positions. Its gate drivers provide 0–5 V logic-level outputs referenced to BOOT and PHASE, respectively, which match standard e-mode FET thresholds. Depletion-mode FETs are incompatible due to required negative turn-off bias and differing timing constraints. This requirement is explicitly stated in Section 8.2.1 of the NCP1595CMNTWG application schematic guidelines.
NCP1595CMNTWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 4.68V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (3x3)
NCP1595CMNTWG FAQ
1.How can I place an order for NCP1595CMNTWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1595CMNTWG 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 NCP1595CMNTWG reliable?
The price and inventory of NCP1595CMNTWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1595CMNTWG is usually 5 days.
3.What payment methods are accepted for NCP1595CMNTWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1595CMNTWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1595CMNTWG?
NCP1595CMNTWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1595CMNTWG 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 NCP1595CMNTWG?
For technical support, including NCP1595CMNTWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1595CMNTWG requirements.
6.How does Aetrix verify that NCP1595CMNTWG is sourced from the original manufacturer or authorized distributors?
All NCP1595CMNTWG 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 NCP1595CMNTWG meets industry standards.
7.What is the process for return or replacement of NCP1595CMNTWG?
All NCP1595CMNTWG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1595CMNTWG, 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 NCP1595CMNTWG part is unused and in its original packaging.
Return procedure for NCP1595CMNTWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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