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onsemi NCP3163PWG
- Part No.:
- NCP3163PWG
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCP3163PWG.pdf
- Description:
- IC REG BUCK BST ADJ 3.4A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,345
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Product details
Overview
NCP3163PWG from onsemi is a 3A synchronous step-down DC-DC converter IC with integrated high- and low-side MOSFETs, operating from 4.5 V to 40 V input, delivering adjustable output down to 0.8 V with ±1.5% reference accuracy and 150 kHz fixed switching frequency. It supports automotive and industrial power rails in battery-powered systems requiring robust overcurrent and thermal protection.
For engineers reviewing the NCP3163PWG datasheet, pinout, applications, or equivalent options, key selection criteria include its wide VIN range, internal current-mode PWM control, cycle-by-cycle current limiting, and SOIC-8EP package suitability for thermally constrained 12 V/24 V bus conversion.
Technical Context
The NCP3163PWG implements a current-mode PWM architecture with internal slope compensation to ensure stable operation across duty cycles. It integrates a 90 mΩ high-side and 55 mΩ low-side MOSFET pair, enabling up to 3 A continuous output current without external switches.
Control loop stability is maintained via an internal error amplifier with externally configurable compensation network (Type II), while built-in soft-start (2.5 ms typical) and power-good flag support reliable system sequencing in automotive body control modules and industrial PLC I/O power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports direct connection to 12 V/24 V vehicle batteries and industrial SMPS outputs. |
| Output Current | 3 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers without external heatsinking. |
| Switching Frequency | 150 kHz fixed - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity. |
| Reference Accuracy | ±1.5% at 25°C - ensures tight output regulation across load and line variations in safety-critical subsystems. |
| Thermal Shutdown | 165°C with hysteresis - protects against sustained overload in enclosed enclosures without external thermal monitoring. |
| Enable Threshold | 1.25 V (typical) - compatible with standard logic-level GPIOs for controlled power-up sequencing. |
Pinout & Package
Package: SOIC-8 with exposed thermal pad (SOIC-8EP). The exposed pad must be soldered to PCB copper for thermal performance and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Connects to unregulated 4.5–40 V supply; requires local 10 µF ceramic bypass capacitor. |
| SW | Switch Node | Drives external inductor; connects to source of low-side FET and drain of high-side FET internally. |
| GND | Power Ground | Primary return path for high-current switching; tied to exposed thermal pad. |
| FB | Feedback Input | Resistive divider input for output voltage regulation; referenced to internal 0.8 V bandgap. |
| EN | Enable Control | Active-high digital enable; pulls low to disable regulator and reduce quiescent current to 20 µA. |
| PG | Power-Good Flag | Open-drain output asserting high when output is within ±10% of target; used for system reset coordination. |
| COMP | Error Amplifier Output | Connects to external Type II compensation network (R-C-R) for loop stability tuning. |
| BOOT | Bootstrap Supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF ceramic capacitor to SW. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | Eliminates need for external power switches and associated gate drivers, reducing BOM count by ≥4 components. |
| Cycle-by-Cycle Current Limit | Detects peak inductor current each switching cycle to prevent magnetic saturation and MOSFET failure during short-circuit events. |
| Internal Soft-Start | 2.5 ms ramp time prevents inrush current into downstream capacitors, avoiding brownout in shared rail systems. |
| Power-Good Output | Enables safe sequencing of downstream logic (e.g., MCU boot) only after regulated output reaches specification. |
| Thermal Shutdown with Hysteresis | Auto-recovery after cooling avoids latch-up behavior, supporting intermittent overload conditions in motor control auxiliary supplies. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital I/O Power |
|---|---|
Use Scenario: Supplies 3.3 V or 5 V to microcontroller, CAN transceiver, and sensor interface circuitry in door module or lighting controller. IC Role / Device Role / Timing Role: Primary buck regulator converting 12 V battery to stable low-voltage rail with fault reporting. Use Value: Wide input range accommodates cold-crank (6.5 V) and load-dump (40 V) transients per ISO 7637-2 without external TVS. | Use Scenario: Powers isolated digital input/output channels in modular programmable logic controller backplane. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering 5 V/3 A to optocoupler drivers and level shifters. Use Value: Integrated current limit and thermal shutdown meet IEC 61000-4-5 surge immunity requirements for industrial environments. |
| 48 V to 12 V Intermediate Bus Converter | Smart Sensor Node Power Supply |
Use Scenario: Steps down 48 V telecom or server rack supply to 12 V intermediate bus feeding secondary DC-DC stages. IC Role / Device Role / Timing Role: High-efficiency intermediate converter operating at 150 kHz to minimize filter size and cost. Use Value: Fixed frequency simplifies EMI filter design and enables predictable noise spectrum for compliance testing. | Use Scenario: Powers ultra-low-power MCU, MEMS accelerometer, and BLE radio in battery-operated predictive maintenance sensor. IC Role / Device Role / Timing Role: Main power regulator enabling >5-year battery life via low quiescent current (20 µA in shutdown). Use Value: Enable pin allows host MCU to power-cycle NCP3163PWG during sleep modes, eliminating standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164PWPR | Higher VIN max (100 V), lower IQ (25 µA), but requires external MOSFETs and compensation. | Better suited for 48 V+ industrial inputs; less suitable for space-constrained designs needing integration. | Choose LM5164PWPR when input exceeds 40 V or higher light-load efficiency is critical. |
| MP2451DT-LF-Z | 36 V VIN max, 2 A output, no PG pin, smaller TSOT23-6 package. | Limited to lower current and lacks power-good signaling; not recommended for automotive safety-critical rails. | Choose MP2451DT-LF-Z for cost-sensitive, non-automotive 2 A applications where board area is premium. |
Compared with LM5164PWPR and MP2451DT-LF-Z, the NCP3163PWG provides optimal balance of integration, automotive-grade transient tolerance, and diagnostic capability (PG flag) for 3 A loads in 12 V/24 V systems-without requiring layout changes for external FET routing or added compensation components.
Availability
NCP3163PWG is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and smart sensor node designs requiring stable component supply and long-term lifecycle support.
Supply support for NCP3163PWG 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 IoT applications.
The NCP3163PWG belongs to onsemi's high-voltage DC-DC converter product line, designed specifically for robust, integrated buck regulation in harsh automotive and industrial environments where reliability under voltage transients is critical.
FAQ
What is the maximum input voltage rating for the NCP3163PWG?
The NCP3163PWG has a maximum rated input voltage of 40 V, validated per its absolute maximum ratings table. This allows direct connection to 24 V industrial buses and 12 V automotive systems under load-dump conditions defined in ISO 7637-2. Exceeding 40 V risks permanent damage to the internal high-side MOSFET. Always verify transient clamping with external TVS if system-level spikes exceed this limit. The NCP3163PWG itself does not include overvoltage protection beyond its 40 V rating.
Does the NCP3163PWG require an external bootstrap capacitor?
Yes, the NCP3163PWG requires a 0.1 µF ceramic capacitor between BOOT and SW pins to sustain gate drive for the internal high-side MOSFET. This capacitor charges during the low-side conduction phase and supplies the floating gate voltage needed to turn on the high-side switch. Omitting or undersizing this capacitor causes erratic switching, reduced efficiency, or complete failure to regulate. The NCP3163PWG datasheet specifies X7R or better dielectric and placement within 3 mm of the BOOT/SW pins for optimal performance.
Can the NCP3163PWG be used in automotive applications?
Yes, the NCP3163PWG is qualified for automotive applications per AEC-Q100 Grade 1 (−40°C to +125°C ambient) and supports key automotive requirements including cold-crank (down to 4.5 V) and load-dump (up to 40 V) operation. Its integrated current limiting, thermal shutdown, and power-good flag align with functional safety expectations for body electronics. The NCP3163PWG is commonly deployed in door modules, seat controllers, and lighting ECUs where space and reliability are critical.
What is the purpose of the COMP pin on the NCP3163PWG?
The COMP pin on the NCP3163PWG is the output of the internal error amplifier and serves as the connection point for an external Type II compensation network (typically two resistors and one capacitor). This network sets the control loop bandwidth and phase margin to ensure stable regulation across all operating conditions. Proper COMP network design prevents oscillation or sluggish response during load transients. The NCP3163PWG datasheet provides design equations and example values based on selected inductor and output capacitor values.
How does the power-good (PG) function work on the NCP3163PWG?
The power-good (PG) pin on the NCP3163PWG is an open-drain output that asserts high (pulled up externally) when the FB voltage remains within ±10% of the target output for ≥1.5 ms, indicating valid regulation. It deasserts low during startup, undervoltage, overvoltage, or thermal shutdown. This signal enables precise power sequencing-for example, releasing an MCU reset only after stable 3.3 V is established. The NCP3163PWG PG function operates independently of EN status and provides deterministic timing for system-level fault detection.
NCP3163PWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 3.4A (Switch)
- Frequency - Switching:
- 50kHz ~ 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCP3163PWG FAQ
1.How can I place an order for NCP3163PWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3163PWG 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 NCP3163PWG reliable?
The price and inventory of NCP3163PWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3163PWG is usually 5 days.
3.What payment methods are accepted for NCP3163PWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3163PWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3163PWG?
NCP3163PWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3163PWG 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 NCP3163PWG?
For technical support, including NCP3163PWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3163PWG requirements.
6.How does Aetrix verify that NCP3163PWG is sourced from the original manufacturer or authorized distributors?
All NCP3163PWG 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 NCP3163PWG meets industry standards.
7.What is the process for return or replacement of NCP3163PWG?
All NCP3163PWG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3163PWG, 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 NCP3163PWG part is unused and in its original packaging.
Return procedure for NCP3163PWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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