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onsemi NCV33163DWR2
- Part No.:
- NCV33163DWR2
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV33163DWR2.pdf
- Description:
- IC REG BUCK BST ADJ 2.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,304
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Product details
Overview
NCV33163DWR2 from onsemi is a monolithic step-up/step-down/inverting switching regulator IC with integrated 2.5 A output switch, 2.5 V to 60 V input range, 45–60 kHz oscillator, precision 1.25 V feedback reference, and low-voltage indicator output. It operates in fixed on-time, variable off-time voltage-mode ripple regulation and is used in automotive DC-DC converters requiring high reliability and minimal external components.
For engineers reviewing the NCV33163DWR2 datasheet, pinout, applications, or equivalent options, this device supports direct microprocessor reset signaling via LVI output, cycle-by-cycle current limiting, thermal shutdown, bootstrap-driven efficiency enhancement, and flexible topology implementation without loop compensation.
Technical Context
The NCV33163DWR2 implements a voltage-mode ripple regulator architecture with fixed on-time and variable off-time control, eliminating need for dominant-pole loop compensation. Its oscillator generates a sawtooth waveform (0.55 V valley, 1.25 V peak) using 225 µA charge / 25 µA discharge currents, enabling precise duty-cycle control up to 90%.
Two independent comparators provide dual feedback paths: FB1 (5.05 V threshold) for main output regulation and FB2 (1.225 V threshold) for LVI reset generation with 15 mV hysteresis. Current limiting is implemented via an Ipk Sense comparator with 250 mV threshold referenced to VCC, triggering cycle-by-cycle shutdown when exceeded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 60 V - supports wide-range automotive battery and industrial supply inputs without pre-regulation. |
| Output Switch Current | 2.5 A peak - enables ≥3 A continuous output in step-down configurations with proper heatsinking and bootstrap assist. |
| Oscillator Frequency | 45–60 kHz - programmable via CT capacitor; stable over temperature and line (±5% variation). |
| Feedback Reference Voltage | 1.225 V (FB2), 5.05 V (FB1) - factory-trimmed ±2% accuracy enables precise output regulation and LVI threshold setting. |
| LVI Output Sink Capability | 10 mA at 0.4 V saturation - directly drives standard microprocessor reset inputs without external buffer. |
| Thermal Shutdown Threshold | Typically 170°C - internal protection prevents catastrophic failure during overload or poor PCB thermal design. |
| Standby Supply Current | 6.0–10 mA - low quiescent draw supports always-on automotive modules with battery conservation. |
Pinout & Package
NCV33163DWR2 uses a SOIC-16 WB (Case 751G) surface-mount package with heat-tab construction-pins 4, 5, 12, and 13 form the exposed thermal pad connected internally to GND for enhanced junction-to-board conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LVI) | Low Voltage Indicator Output | Open-collector output that sinks current when VFB2 falls below 1.125 V; interfaces directly to µP reset pins. |
| 2 (VFB2) | Feedback Comparator 2 Input | Non-inverting input for LVI function; internally biased at 1.125 V; requires external resistor divider for system monitoring. |
| 3 (VFB1) | Feedback Comparator 1 Input | Non-inverting input for main output regulation; internally biased at 5.05 V; supports direct 5 V output connection. |
| 4, 5, 12, 13 (GND) | Ground / Thermal Pad | Four dedicated ground pins forming mechanical and thermal heat tab; must be soldered to large copper area for RJC = 18°C/W. |
| 6 (CT) | Oscillator Timing Capacitor | Connects external capacitor to set oscillator frequency and on-time; sensitive to layout parasitics and ESR. |
| 7, 8 (VCC) | Power Supply Input | Primary IC supply rail; accepts 2.5–60 V; powers internal bias, oscillator, and drivers. |
| 9 (Ipk Sense) | Current Limit Sense Input | Monitors voltage drop across external sense resistor (RSC); trips at 250 mV above VCC to limit switch current. |
| 10 (Bootstrap Input) | Bootstrap Driver Supply | Accepts boosted voltage (up to VCC + 7.0 V) to reduce output switch saturation voltage in step-down/inverting topologies. |
| 11 (Switch Emitter) | Output Switch Emitter Terminal | Emitter of internal NPN power transistor; connects to inductor or load return path; may go negative during flyback. |
| 14, 15 (Switch Collector) | Output Switch Collector Terminals | Dual collector pins for high-current routing; rated for 60 V C-E and 2.5 A peak; share internal die connection. |
| 16 (Driver Collector) | Driver Output Collector | Collector of internal driver transistor; used for external current boosting or Darlington configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5 A Switch with Bootstrap Support | Reduces VCE(sat) to ≤0.6 V in bootstrapped mode, improving efficiency by ~4.5% in 12 V→5 V step-down designs. |
| Dual Independent Feedback Comparators | Enables simultaneous main output regulation (via FB1) and system-level brownout detection (via FB2/LVI) without external ICs. |
| Cycle-by-Cycle Current Limiting | Prevents switch destruction during short-circuit or overload by terminating conduction each cycle when Ipk exceeds 2.5 A. |
| Thermal Shutdown with Hysteresis | Shuts down at ~170°C and re-enables only after cooling to ~150°C, preventing thermal runaway in confined enclosures. |
| Automotive-Qualified NCV Prefix | Meets AEC-Q100 Grade 1 (−40°C to +125°C ambient) and includes unique site/control change requirements for automotive OEM programs. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V to 5 V Power Supply |
|---|---|
|
Use Scenario: Regulating 12 V/24 V battery input to stable 5.05 V for microcontroller, CAN transceiver, and sensor interface circuits in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing step-down conversion with LVI-triggered MCU reset during cold-crank events. Use Value: Eliminates need for separate supervisor IC; achieves 81.2% efficiency at 3 A load with bootstrap assist and meets automotive transient immunity requirements. |
Use Scenario: Generating isolated 5 V rail from unregulated 24 V industrial bus for PLC I/O modules operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Fixed-frequency switching regulator with cycle-by-cycle current limiting and thermal shutdown for robust field deployment. Use Value: Maintains ±0.02% load regulation at 1.0 A and survives −40°C to +115°C ambient per datasheet limits without derating. |
| Automotive Infotainment Display Backlight Supply | Medical Portable Device Battery Booster |
|
Use Scenario: Driving LED backlight strings in automotive center-stack displays using step-up topology from 12 V battery to 28 V output. IC Role / Device Role / Timing Role: Step-up converter controller with 88.1% efficiency at 600 mA and low output ripple (140 mVpp) for flicker-free illumination. Use Value: Integrates oscillator, comparator, and 2.5 A switch in single SOIC-16 WB package-reduces BOM count vs. discrete controller + MOSFET solutions. |
Use Scenario: Boosting single-cell Li-ion (3.0–4.2 V) to 5 V USB power for portable diagnostic tools requiring low standby current and reliable startup. IC Role / Device Role / Timing Role: Wide-input step-up regulator with 2.5 V minimum start-up voltage and 6 mA standby ICC enabling multi-day battery life. Use Value: Functions down to 1.7 V at room temperature (Fig. 16); supports compact design with 680 pF CT and Coilcraft LO451-A inductor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0 | Fixed 5 V output, 3 A switch, no LVI output, no bootstrap input, lower max input (40 V). | Lacks microprocessor reset signaling and efficiency-boosting bootstrap capability; limited to fixed-output step-down only. | Choose for cost-sensitive, non-automotive 5 V point-of-load where LVI and topology flexibility are unnecessary. |
| TPS54202DDCR | Synchronous buck controller, 2 A, 3–17 V input, integrated FETs, no LVI, no inverting/boost support. | Requires external inductor and output capacitor only; lacks multi-topology capability and automotive qualification. | Prefer for high-efficiency 12 V→3.3 V/5 V synchronous buck in commercial applications where footprint and EMI matter more than topology versatility. |
Compared with LM2596S-5.0 and TPS54202DDCR, the NCV33163DWR2 uniquely supports step-up, step-down, and inverting topologies in one IC, includes automotive-grade LVI and thermal protection, and delivers higher peak current (2.5 A) with bootstrap-assisted saturation-making it optimal for space-constrained, multi-rail automotive and industrial systems.
Availability
NCV33163DWR2 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24 V power supplies, infotainment display supplies, and portable medical device boosters requiring stable component supply across extended temperature and lifecycle demands.
Supply support for NCV33163DWR2 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 focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications.
The NCV33163 series belongs to onsemi's automotive-qualified power management portfolio, designed specifically for robust, multi-topology DC-DC conversion in safety-critical vehicle subsystems and harsh-environment industrial controls.
FAQ
What is the minimum input voltage required for NCV33163DWR2 to start switching?
The NCV33163DWR2 can initiate switching down to 1.7 V at room temperature (per Figure 16), but guaranteed parametric operation begins at 2.5 V. For reliable startup under all conditions-including cold-crank automotive transients-designers should ensure VCC remains ≥2.5 V. Below 3.0 V, the Bootstrap Input must be tied directly to VCC to maintain driver functionality.
How does the LVI output of NCV33163DWR2 interface with a microprocessor reset input?
The NCV33163DWR2 LVI output is an open-collector pin (Pin 1) that sinks up to 10 mA when VFB2 falls below 1.125 V. To interface with a standard µP reset input, connect a pull-up resistor (e.g., 10 kΩ to VCC) and optionally add RLVI/CDLY for programmable delay. The output saturates to ≤0.4 V at 2 mA sink, meeting most µP reset low-threshold requirements.
Can NCV33163DWR2 be used in voltage-inverting configurations, and what are key layout considerations?
Yes, NCV33163DWR2 supports voltage-inverting topologies (see Figure 25). Critical layout practices include minimizing parasitic inductance in the RSC current-sense path to prevent false current-limit triggering, using Schottky rectifiers (e.g., 1N5822) with low VF and fast recovery, and clamping the switch emitter to avoid excessive negative voltage (≤−0.5 V) that increases conduction loss and heating.
What thermal performance can be expected from NCV33163DWR2 in SOIC-16 WB package?
In SOIC-16 WB (DW suffix), the NCV33163DWR2 achieves RJC = 18°C/W when pins 4, 5, 12, and 13 are soldered to ≥100 mm² of 2 oz copper. With adequate PCB copper area, junction-to-air thermal resistance drops to ~94°C/W (Figure 18), enabling 1.8 W continuous dissipation at TA = 50°C. Derating is required above 70°C ambient per Figure 18 curves.
Does NCV33163DWR2 require external compensation components for stability?
No, the NCV33163DWR2 uses fixed on-time, variable off-time voltage-mode ripple regulation, which inherently avoids the need for external loop compensation. Stability is maintained across line, load, and temperature without type-II or type-III compensation networks-simplifying design and reducing BOM count compared to traditional voltage-mode or current-mode controllers.
NCV33163DWR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 60V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 2.5A (Switch)
- Frequency - Switching:
- 55kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 115°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCV33163DWR2 FAQ
1.How can I place an order for NCV33163DWR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV33163DWR2 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 NCV33163DWR2 reliable?
The price and inventory of NCV33163DWR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV33163DWR2 is usually 5 days.
3.What payment methods are accepted for NCV33163DWR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV33163DWR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV33163DWR2?
NCV33163DWR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV33163DWR2 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 NCV33163DWR2?
For technical support, including NCV33163DWR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV33163DWR2 requirements.
6.How does Aetrix verify that NCV33163DWR2 is sourced from the original manufacturer or authorized distributors?
All NCV33163DWR2 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 NCV33163DWR2 meets industry standards.
7.What is the process for return or replacement of NCV33163DWR2?
All NCV33163DWR2 units undergo pre-shipment inspection (PSI). If there is an issue with NCV33163DWR2, 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 NCV33163DWR2 part is unused and in its original packaging.
Return procedure for NCV33163DWR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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