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onsemi NCV33163DWR2G
- Part No.:
- NCV33163DWR2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV33163DWR2G.pdf
- Description:
- IC REG BUCK BST ADJ 2.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:969
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Product details
Overview
NCV33163DWR2G 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 for microprocessor reset signaling - used in automotive DC-DC converter designs requiring high-current, multi-topology flexibility with minimal external components.
For engineers reviewing the NCV33163DWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its dual feedback comparators (VFB1 = 5.05 V, VFB2 = 1.25 V), cycle-by-cycle current limiting at 250 mV sense threshold, bootstrap-capable driver, thermal shutdown at +150 °C junction, and SOIC-16 WB package with heat-tab thermal enhancement.
Technical Context
The NCV33163DWR2G implements fixed on-time, variable off-time voltage-mode ripple regulation using an internal sawtooth oscillator (1.25 V peak / 0.55 V valley) driven by 225 µA charge / 25 µA discharge currents. Its dual feedback comparators support independent regulation paths: one for main output control (5.05 V nominal reference), another for low-voltage monitoring (1.125 V LVI threshold with 15 mV hysteresis).
Protection includes cycle-by-cycle current limiting via Ipk sense comparator (250 mV threshold), internal thermal shutdown (trip at ~170 °C), and driver/switch saturation control enabled by separate emitter/collector pins and bootstrap input (VZ = VCC + 7.0 V). The device operates across −40 °C to +115 °C ambient and supports bootstrapped or non-bootstrapped switch configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 60 V - enables direct battery-input operation in 12 V/24 V automotive systems without pre-regulation. |
| Output Switch Current | 2.5 A peak - supports ≥3 A continuous output in step-down topologies with proper heatsinking and bootstrap assist. |
| Oscillator Frequency | 45–60 kHz (typ. 46 kHz at 25°C) - balances EMI control and inductor size for cost-sensitive industrial converters. |
| Feedback Reference Voltage | 1.25 V (FB2) and 5.05 V (FB1) - allows direct 5 V output sensing or programmable output via resistor divider with <±0.03 V total variation over temp/voltage. |
| Current Sense Threshold | 250 mV - sets RSC = 0.1 Ω for 2.5 A peak switch current, enabling precise cycle-by-cycle overcurrent protection. |
| LVI Output Sink Capability | 10 mA sink at ≤0.4 V saturation - directly drives standard microprocessor reset inputs without external pull-up or level-shifting. |
| Junction Temperature Limit | +150 °C - defines maximum safe operating point; thermal shutdown activates at ~170 °C to prevent catastrophic failure. |
Pinout & Package
NCV33163DWR2G uses the SOIC-16 WB (Case 751G) surface-mount package with exposed heat tab connected to pins 4, 5, 12, and 13 - optimized for PCB copper-area thermal conduction (RJA = 94 °C/W, RJC = 18 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LVI) | Low Voltage Indicator Output | Open-collector output asserting active-low reset when VFB2 falls below 1.125 V; sinks up to 10 mA. |
| 2 (VFB2) | Feedback Comparator 2 Input | Non-inverting input for LVI function; internally biased at 1.125 V; used for microprocessor supply monitoring. |
| 3 (VFB1) | Feedback Comparator 1 Input | Non-inverting input for main output regulation; referenced to 5.05 V internal threshold; high-impedance (±0.4 µA bias). |
| 4,5,12,13 (GND) | Ground / Heat Tab Terminals | Four dedicated ground pins forming thermal heat tab; must be soldered to large PCB copper area for thermal management. |
| 6 (CT) | Oscillator Timing Capacitor | Connects external capacitor (e.g., 620 pF) to set oscillator frequency and on-time; clamped to GND disables switching. |
| 7 (VCC) | Power Supply Input | Primary IC supply rail; accepts 2.5–60 V; powers internal circuitry and bootstrap zener clamp (VZ = VCC + 7.0 V). |
| 8 (Ipk Sense) | Current Limit Sense Input | Monitors voltage drop across RSC; trips at 250 mV to initiate cycle-by-cycle shutdown of output switch. |
| 9 (Bootstrap Input) | Bootstrap Driver Supply | Accepts boosted voltage (up to VCC + 7.0 V) to reduce output switch saturation voltage and improve efficiency. |
| 10 (Switch Emitter) | Output Switch Emitter Terminal | Emitter node of internal NPN switch; externally accessible to enable Darlington configuration or external boost transistors. |
| 11 (GND) | Ground Reference | Additional ground connection; electrically tied to pins 4,5,12,13 but routed separately for layout flexibility. |
| 14 (Switch Collector) | Output Switch Collector Terminal | Main high-current switching node; rated for 60 V C-E and 2.5 A peak; connects to inductor or rectifier in all topologies. |
| 15 (Driver Collector) | Driver Output Collector | Drives external NPN/PNP transistors for higher-current switch extensions; rated for 60 V and 150 mA sink capability. |
| 16 (VCC) | Secondary Power Supply | Dual VCC pin; shares same supply as pin 7; improves decoupling and current delivery to oscillator and logic blocks. |
Key Features
| Feature | Design Value |
|---|---|
| 2.5 A Integrated Switch | Eliminates need for external power transistor in ≤3 A DC-DC designs, reducing BOM count and layout complexity. |
| Dual Independent Feedback Comparators | Enables simultaneous main output regulation (via FB1) and system supply monitoring (via FB2/LVI) without external comparators. |
| Bootstrap-Capable Driver | Reduces switch VCE(sat) from 1.0 V to 0.6 V (typ.), increasing step-down efficiency by up to 4.5 percentage points (e.g., 76.7% → 81.2%). |
| Cycle-by-Cycle Current Limiting | Prevents switch destruction during overload or short-circuit events using real-time Ipk sensing at 250 mV threshold. |
| Automotive-Qualified Thermal Shutdown | Activates at ~170 °C junction temperature to protect against sustained overloads or inadequate heatsinking in under-hood environments. |
| Pb-Free SOIC-16 WB Package | Meets RoHS requirements and provides enhanced thermal performance via four-pin heat tab (RJC = 18 °C/W). |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V to 5 V Step-Down Converter |
|---|---|
Use Scenario: Regulating 12 V battery input to stable 5.05 V for microcontroller, CAN transceiver, and sensor interface circuits in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing step-down topology with integrated 2.5 A switch, feedback regulation, and LVI-driven MCU reset. Use Value: Achieves 81.2% efficiency at 3 A load with bootstrap assist, meets AEC-Q100 Grade 1 (−40 °C to +125 °C) ambient requirement, and eliminates discrete reset IC. |
Use Scenario: Converting unregulated 24 V factory bus to clean 5 V for PLC I/O modules and fieldbus gateways operating in harsh industrial environments. IC Role / Device Role / Timing Role: High-reliability step-down regulator with cycle-by-cycle current limiting, thermal shutdown, and wide 2.5–60 V input tolerance for brownout resilience. Use Value: Delivers ±0.02% load regulation and 36 mVpp output ripple at full load; SOIC-16 WB heat tab enables convection-only cooling in sealed enclosures. |
| Automotive Infotainment Display Power | Inverting Supply for Op-Amp Bias Rails |
Use Scenario: Generating −12 V from 12 V battery for LCD bias or audio amplifier dual-rail supplies in head units or digital dashboards. IC Role / Device Role / Timing Role: Inverting DC-DC controller using internal switch and external Schottky rectifier (1N5822), regulated via FB2 feedback path. Use Value: Provides −12 V/1.0 A with 77.5% efficiency and ±0.01% load regulation; LVI output monitors main 5 V rail to assert display reset on undervoltage. |
Use Scenario: Creating split ±12 V rails from single 24 V supply for precision instrumentation op-amps and ADC drivers in test equipment. IC Role / Device Role / Timing Role: Dual-output controller: one channel step-down (12 V), second channel inverting (−12 V), both regulated independently via FB1/FB2. Use Value: Enables rail-to-rail analog signal swing with <130 mVpp ripple on inverted output; dual feedback comparators allow independent voltage accuracy tuning. |
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/NOPB | Fixed 5 V output, 3 A switch, no LVI output, no dual feedback, lower max input (40 V), no bootstrap driver. | Suitable only for basic step-down; cannot implement step-up, inverting, or microprocessor reset functions. | Select when only fixed 5 V output is needed and LVI/multi-topology capability is unnecessary. |
| TPS54202DRCT | 2 A synchronous buck, 3–28 V input, integrated FETs, no inverting/step-up capability, no LVI, requires external compensation. | Optimized for compact, high-efficiency step-down only; lacks multi-topology flexibility and system monitoring features. | Choose for space-constrained 12 V→3.3 V/5 V designs where synchronous rectification and smaller footprint outweigh missing features. |
Compared with LM2596S-5.0/NOPB and TPS54202DRCT, the NCV33163DWR2G uniquely combines step-up/step-down/inverting topology support, dual independent feedback paths, integrated LVI reset, and bootstrap-assisted efficiency - making it the only option among the three qualified for automotive-grade multi-rail power systems requiring functional safety monitoring.
Availability
NCV33163DWR2G is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V power conversion, and infotainment display supply applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle availability.
Supply support for NCV33163DWR2G 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power markets.
The NCV33163DWR2G belongs to onsemi's automotive-qualified switching regulator product line, designed specifically for robust, multi-topology DC-DC conversion in under-hood and chassis-mounted electronic control units.
FAQ
What is the maximum input voltage rating for the NCV33163DWR2G?
The NCV33163DWR2G has a maximum power supply voltage (VCC) rating of 60 V, and its switch collector can withstand up to 60 V relative to emitter. This allows direct connection to 48 V battery systems or transient-tolerant 24 V automotive rails without external clamping. Absolute maximum ratings must not be exceeded to avoid permanent damage.
Does the NCV33163DWR2G support step-up (boost) converter topologies?
Yes, the NCV33163DWR2G explicitly supports step-up, step-down, and voltage-inverting topologies as stated in its datasheet title and application circuits (e.g., Figure 23). It achieves this using its integrated 2.5 A switch, dual feedback comparators, and flexible pinout - enabling boost designs with external inductor, diode, and output capacitor without additional controller ICs.
How does the Low Voltage Indicator (LVI) output function in the NCV33163DWR2G?
The LVI output (Pin 1) is an open-collector comparator that asserts low when the voltage at Pin 2 (VFB2) falls below 1.125 V, with 15 mV hysteresis to prevent chatter. It sinks up to 10 mA and interfaces directly with microprocessor reset inputs. In the NCV33163DWR2G, this feature is implemented without external components, providing system-level undervoltage protection.
What thermal management is required for the NCV33163DWR2G in continuous 2.5 A operation?
For continuous 2.5 A output in step-down mode, the NCV33163DWR2G requires PCB copper heatsinking on pins 4, 5, 12, and 13 (the heat tab). With 2 oz copper and ≥30 mm² pad area, junction-to-air thermal resistance drops to ~94 °C/W. At 115 °C max ambient, this allows ~1.5 W dissipation - sufficient for typical 81% efficient operation at 12 V input/5 V output.
Can the NCV33163DWR2G replace the older NCV33163DW in existing designs?
Yes, the NCV33163DWR2G is a tape-and-reel variant of the NCV33163DW with identical electrical specifications, pinout, and SOIC-16 WB packaging. The "R2G" suffix denotes Pb-free packaging and 1000-piece reel quantity per ordering code - making it a direct drop-in replacement for board assembly and automated placement without layout or firmware changes.
NCV33163DWR2G 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:
- Active
- 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
NCV33163DWR2G FAQ
1.How can I place an order for NCV33163DWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV33163DWR2G 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 NCV33163DWR2G reliable?
The price and inventory of NCV33163DWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV33163DWR2G is usually 5 days.
3.What payment methods are accepted for NCV33163DWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV33163DWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV33163DWR2G?
NCV33163DWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV33163DWR2G 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 NCV33163DWR2G?
For technical support, including NCV33163DWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV33163DWR2G requirements.
6.How does Aetrix verify that NCV33163DWR2G is sourced from the original manufacturer or authorized distributors?
All NCV33163DWR2G 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 NCV33163DWR2G meets industry standards.
7.What is the process for return or replacement of NCV33163DWR2G?
All NCV33163DWR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV33163DWR2G, 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 NCV33163DWR2G part is unused and in its original packaging.
Return procedure for NCV33163DWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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