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onsemi NCV51411PWR2G
- Part No.:
- NCV51411PWR2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV51411PWR2G.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,201
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Product details
Overview
NCV51411PWR2G from onsemi is an automotive-grade 1.5 A synchronous buck regulator IC with V² control architecture, fixed 260 kHz switching frequency, 4.5 V to 40 V input range, and integrated NPN power switch. It delivers fast transient response for engine control units, ADAS camera modules, and infotainment power rails.
For engineers reviewing the NCV51411PWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its V² control loop stability, boost-pin bootstrapped gate drive, sync-capable parallel operation, and AEC-Q100 qualification for under-hood environments.
Technical Context
The NCV51411PWR2G implements proprietary V² control using output voltage ripple as the PWM ramp signal-enabling instantaneous duty-cycle modulation without error amplifier bandwidth limitations. Its transconductance error amplifier (6.4 mA/V) interfaces via the VC pin for simplified compensation with a single 0.1 µF capacitor.
It integrates cycle-by-cycle current limiting (1.6–3.0 A), thermal shutdown (175–195 °C trip), frequency foldback (25% nominal frequency under short circuit), and TTL-compatible SYNC/SHDNB inputs. The BOOST pin enables bootstrapped NPN saturation, reducing VCE(sat) to 0.4–1.0 V at 1.5 A while minimizing on-chip dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 260 kHz typical; enables compact 15–22 µH inductors and reduces EMI filtering burden. |
| Output Current | 1.5 A continuous; supports mid-power ECUs and sensor hubs without external MOSFETs. |
| Input Voltage Range | 4.5 V to 40 V DC; accommodates cold-crank (4.5 V) and load-dump (45 V transient) conditions per ISO 7637-2. |
| V² Control Architecture | Uses output ripple as native PWM ramp; eliminates subharmonic oscillation >50% duty cycle and enables <10 µs load transient recovery. |
| Reference Voltage Tolerance | ±2.0% at VFB; ensures ±2.0% output regulation accuracy across temperature and line variations. |
| Sync Frequency Range | 305–470 kHz; allows noise-sensitive systems (e.g., radar receivers) to lock switching to external clock and avoid beat frequencies. |
| Shutdown Quiescent Current | 85 µA max; meets automotive "always-on" low-power requirements for telematics wake-up circuits. |
| Thermal Shutdown Hysteresis | 42 °C; prevents thermal cycling during sustained overload in sealed enclosures. |
Pinout & Package
NCV51411PWR2G is packaged in SO-8 (Case 751, D suffix), with exposed pad thermally connected to GND for enhanced heat dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOST | NPN base drive supply | Accepts bootstrapped voltage ≥ VIN + 2.5 V to ensure transistor saturation; reduces conduction loss and die temperature rise. |
| 2 - VIN | Main power input | Supplies internal LDO, oscillator, and logic; withstands 45 V transients per ISO 7637-2 Pulse 5a. |
| 3 - VSW | Switch emitter node | Connects to inductor; swings to −1.0 V for <50 ns during flyback; requires short, low-inductance trace to diode and inductor. |
| 4 - SHDNB | Active-low enable | TTL-compatible; pulls below 1.0 V to enter sleep mode (85 µA IQ); internal pull-up eliminates need for external resistor. |
| 5 - SYNC | External clock input | Accepts 305–470 kHz TTL pulses; overrides internal oscillator and disables foldback during sync mode. |
| 6 - GND | Power return | Common reference for all analog and power circuits; must be solidly connected to thermal pad and chassis ground. |
| 7 - VFB | Error amplifier inverting input | Senses output via resistor divider; drops below 0.29 V to trigger frequency/current foldback during overloads. |
| 8 - VC | Error amplifier output | Provides compensated control voltage to PWM comparator; clamped to limit recovery time after fault events. |
Key Features
| Feature | Design Value |
|---|---|
| V² control architecture | Delivers <10 µs load transient response without complex Type III compensation networks. |
| Frequency foldback | Reduces switching frequency to 65 kHz under short circuit, cutting power dissipation by >75% versus fixed-frequency operation. |
| Bootstrapped BOOST drive | Enables NPN saturation at high duty cycles, maintaining <0.7 V VCE(sat) up to 1.5 A and improving efficiency by 3–5% at 12 VIN/3.3 VOUT. |
| AEC-Q100 Grade 1 | Qualified from −40 °C to +125 °C junction; supports placement near engines, transmissions, and brake controllers. |
| Soft-start via VC pin | Uses internal error amplifier source current (15–35 mA) charging external 0.1 µF capacitor to achieve ~5 ms controlled output ramp. |
| Integrated protection | Combines cycle-by-cycle current limit, thermal shutdown with 42 °C hysteresis, and startup voltage lockout (2.2–4.4 V). |
Applications
| Engine Control Unit (ECU) Power Supply | ADAS Camera Module Regulator |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and analog sensors in gasoline/diesel engine management systems exposed to 12 V battery with load dump. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V buck converter delivering regulated rail with immunity to 45 V transients and −40 °C to +125 °C operation. Use Value: Eliminates need for external TVS and discrete NPN/MOSFET, reducing BOM count by 4 components and PCB area by 25% versus discrete solutions. | Use Scenario: Supplies image sensor, ISP, and MIPI interface in forward-facing driver assistance cameras mounted behind windshield. IC Role / Device Role / Timing Role: Low-noise, sync-capable 3.3 V/1.2 V dual-rail generator synchronized to system master clock to suppress switching artifacts in video stream. Use Value: SYNC pin alignment avoids beat frequencies with pixel clock, reducing image banding; V² control maintains <±1% regulation during rapid LED flash load steps. |
| Infotainment Head Unit Core Rail | Body Control Module (BCM) Subsystem |
Use Scenario: Generates stable 1.1 V core voltage for ARM Cortex-A series SoCs in automotive infotainment head units with variable 9–16 V input. IC Role / Device Role / Timing Role: High-efficiency buck controller with soft-start and shutdown sequencing for multi-rail power management IC coordination. Use Value: 85 µA shutdown current extends battery life during vehicle sleep mode; BOOST pin optimization sustains >92% efficiency at 1 A/1.1 V output. | Use Scenario: Powers door module MCU, LIN transceivers, and window motor drivers in distributed body electronics with wide input variation. IC Role / Device Role / Timing Role: Robust primary DC-DC converter supporting cold-crank (4.5 V) and alternator ripple (up to 200 mVPP) without dropout. Use Value: 2.0% reference tolerance and V² control maintain ±1.5% output accuracy across 4.5–40 V input, eliminating need for post-regulation LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1375CS8#PBF | Pin-compatible SO-8 buck regulator; 1.5 A, 250 kHz, no AEC-Q100 qualification; uses voltage-mode control. | Lacks automotive qualification, foldback protection, and V² transient performance; suitable for industrial prototypes only. | Select only for non-automotive evaluation where LT1375 footprint reuse is mandatory. |
| MPQ4420AGL-AEC1-Z | 1.2 A, 2.2 MHz, AEC-Q100 Grade 1; synchronous buck with integrated high-side/low-side MOSFETs; no BOOST pin. | Higher frequency enables smaller magnetics but lacks bootstrapped NPN drive; different pinout and compensation scheme. | Prefer for space-constrained designs needing >2 MHz switching; not drop-in due to pin mismatch and control loop differences. |
Compared with LT1375CS8#PBF, NCV51411PWR2G adds automotive qualification, superior transient response, and robust fault handling; versus MPQ4420AGL-AEC1-Z, it trades higher frequency for proven NPN reliability and simpler thermal design in high-temperature zones.
Availability
NCV51411PWR2G is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera power, and infotainment subsystems requiring stable component supply across extended temperature and long production lifecycles.
Supply support for NCV51411PWR2G 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 supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with leadership in power management and signal processing.
The NCV51411PWR2G belongs to onsemi's automotive-qualified power conversion portfolio, designed specifically for harsh-environment DC-DC regulation in engine bays, ADAS domains, and body electronics where reliability and transient immunity are critical.
FAQ
What is the maximum input voltage rating for the NCV51411PWR2G, and how does it handle load dump events?
The NCV51411PWR2G supports 40 V DC continuous input and withstands 45 V peak transients per ISO 7637-2 Pulse 5a (31 V load dump at 14 V nominal). Its internal protection circuitry remains functional during these events, and the device continues regulating without latch-off-critical for engine control modules that must survive alternator disconnection scenarios. This rating is confirmed in the Absolute Maximum Ratings table on page 2 of the official datasheet.
Does the NCV51411PWR2G require an external bootstrap capacitor, and what value is recommended?
Yes, the NCV51411PWR2G requires an external 0.1 µF ceramic capacitor between BOOST and VSW pins to sustain bootstrapped gate drive during high-duty-cycle operation. This capacitor ensures the internal NPN transistor remains saturated, minimizing VCE(sat) and on-die power loss. The datasheet Figure 1 and Section 8 explicitly specify this value and recommend placement adjacent to the IC with minimal trace length to reduce ESR-induced voltage droop.
How does the V² control architecture in the NCV51411PWR2G improve transient response compared to standard voltage-mode controllers?
The V² control architecture in the NCV51411PWR2G uses output ripple voltage directly as the PWM ramp signal-bypassing the error amplifier's bandwidth limitation. This enables immediate duty-cycle adjustment within nanoseconds of a load step, achieving <10 µs recovery versus >50 µs for conventional voltage-mode ICs. The datasheet's Theory of Operation section (page 6) confirms this behavior arises from dual feedback paths (FFB and SFB), making transient performance independent of compensation network design.
Can the NCV51411PWR2G be synchronized to an external clock, and what is the valid frequency range?
Yes, the NCV51411PWR2G accepts external synchronization via its SYNC pin across 305–470 kHz, as specified in the Electrical Characteristics table (page 4). During sync mode, the internal oscillator is disabled, frequency foldback is suppressed, and switching aligns precisely to the rising edge of the external clock-enabling EMI reduction in radar and camera systems. The 0.5 µs delay between SYNC edge and VSW edge is documented in Figure 4.
Is the NCV51411PWR2G pin-compatible with the LT1375, and are there any layout or configuration differences to consider?
Yes, the NCV51411PWR2G is functionally pin-compatible with the LT1375 in SO-8 package per datasheet note on page 1 and Pin Description table (page 3). However, layout must account for NCV51411PWR2G's BOOST pin requirement (0.1 µF cap), higher thermal dissipation (RθJA = 165 °C/W), and AEC-Q100-grade solder reflow profile (240 °C peak). Configuration differs in V² vs. voltage-mode compensation-NCV51411PWR2G needs only a single VC-to-GND capacitor, unlike LT1375's multi-component network.
NCV51411PWR2G 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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.27V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 260kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCV51411PWR2G FAQ
1.How can I place an order for NCV51411PWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV51411PWR2G 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 NCV51411PWR2G reliable?
The price and inventory of NCV51411PWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV51411PWR2G is usually 5 days.
3.What payment methods are accepted for NCV51411PWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV51411PWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV51411PWR2G?
NCV51411PWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV51411PWR2G 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 NCV51411PWR2G?
For technical support, including NCV51411PWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV51411PWR2G requirements.
6.How does Aetrix verify that NCV51411PWR2G is sourced from the original manufacturer or authorized distributors?
All NCV51411PWR2G 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 NCV51411PWR2G meets industry standards.
7.What is the process for return or replacement of NCV51411PWR2G?
All NCV51411PWR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV51411PWR2G, 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 NCV51411PWR2G part is unused and in its original packaging.
Return procedure for NCV51411PWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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