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onsemi NCV6356BMTWTXG
- Part No.:
- NCV6356BMTWTXG
- Manufacturer:
- onsemi
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
NCV6356BMTWTXG.pdf
- Description:
- IC REG BUCK PROG 5A 14WDFNW
- Quantity:
- Payment:
- Shipping:
Inventory:3,745
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Product details
Overview
NCV6356BMTWTXG from onsemi is an AEC-Q100 qualified synchronous Adaptive On-time (AOT) buck converter for automotive post-regulation, delivering up to 5.0 A at programmable output voltages from 0.6 V to 1.4 V, operating from 2.5 V–5.5 V input, with 2.4 MHz switching frequency and I²C-controlled dynamic voltage scaling - used in ADAS vision modules and infotainment SoC core rails.
For engineers reviewing the NCV6356BMTWTXG datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (DFN-14), confirmed I²C register-level DVS control, thermal warning thresholds (105 °C pre-warning, 135 °C warning), PFM/PPWM mode transition behavior, and real-world transient response data (±20 mV load step, 1.5 A).
Technical Context
The NCV6356BMTWTXG implements voltage-mode AOT control with dual-mode operation: forced PPWM for stable-frequency regulation in CCM, and automatic PFM for ultra-low quiescent current (60 µA typical) in DCM. Its integrated high-side (38 mΩ typ.) and low-side (29 mΩ typ.) MOSFETs eliminate external rectification, while internal compensation and feedback resistors reduce BOM count.
Thermal management includes three-tiered monitoring (pre-warning at 105 °C, warning at 135 °C, shutdown at 150 °C), all with configurable hysteresis and interrupt signaling via open-drain INTB. Output discharge is active and software-controllable (DISCHG bit), ensuring rail collapse within 100 µs after disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports direct battery, 3.3 V, and 5.0 V rail inputs without external LDO pre-regulation |
| Output Current Capability | 5.0 A at TA = 85 °C - validated with 0.33 µH inductor and 2×22 µF output capacitance |
| Output Voltage Range | 0.6 V to 1.4 V in 6.25 mV steps - programmable via I²C registers PROGVSEL0/PROGVSEL1 or VSEL pin selection |
| Switching Frequency | 2.4 MHz ±10% - enables use of compact 0.33 µH shielded inductors and low-profile ceramic capacitors |
| Quiescent Current | 60 µA typical in PFM mode - sustains >100-hour battery standby in always-on automotive modules |
| I²C Interface Speed | Up to 3.4 MHz - supports rapid DVS transitions between processor performance states without bus contention |
| Thermal Shutdown Threshold | 150 °C (typical) with 30 °C hysteresis - prevents irreversible junction damage during sustained overload or poor heatsinking |
Pinout & Package
NCV6356BMTWTXG is housed in a thermally enhanced 3.0 mm × 4.0 mm, 0.5 mm pitch DFN-14 package (Case 511CM), with exposed thermal pad for PCB-level heat dissipation and optimized power loop layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Analog/Digital Supply Input | Provides bias for internal analog/digital circuitry; must be tied to PVIN and decoupled with ≥4.7 µF ceramic capacitor |
| PVIN (Pins 8,9) | Power Input (Switch Supply) | High-current input for synchronous FETs; requires short, wide traces and ≥10 µF local ceramic decoupling |
| SW (Pins 5,6,7) | Switch Node Output | Drives external inductor; connects directly to high-side drain and low-side source; critical for EMI control |
| PGND (Pins 10,11) | Power Ground Return | Carries peak switching current; must connect to dedicated local ground plane, isolated from AGND except at single point |
| VOUT (Pin 2) | Feedback Sense Input | Connects directly to output capacitor anode via trace (not plane) for accurate regulation and noise immunity |
| EN (Pin 14) | Enable Control Input | Active-high logic enable with internal pull-down; initiates NPUS/QPUS/FPUS sequences depending on entry state |
| VSEL (Pin 13) | Configuration Selection Input | Selects between PROGVSEL0/PROGVSEL1 registers and enables latency-free DVS transitions without I²C latency |
| INTB (Pin 3) | Interrupt Output | Open-drain signal for thermal warning, short-circuit fault, or power-good status; requires external pull-up |
| SCL/SDA (Pins 1,12) | I²C Serial Interface | Supports 3.4 MHz clock rate; enables full register access for DVS, current limit, timing, and protection configuration |
| AGND (Pin 15) | Analog Ground Reference | Reference for error amplifier and ADCs; must tie to system ground at single point near AVIN decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive On-Time (AOT) Control | Enables fast transient response (<100 ns load step recovery) and stable operation across wide VIN/VOUT ranges without external compensation |
| Dynamic Voltage Scaling (DVS) | Hardware-accelerated voltage transitions via VSEL pin or I²C; dV/dt controlled by DVS[1..0] bits for glitch-free SoC performance state changes |
| Three-Tier Thermal Protection | Configurable pre-warning (105 °C), warning (135 °C), and shutdown (150 °C) thresholds with interrupt signaling for predictive thermal management |
| Active Output Discharge | On-chip NMOS discharge path (12–20 Ω typical) ensures safe rail collapse within 100 µs when disabled - eliminates need for external bleed resistor |
| Programmable Peak Current Limit | IPEAK[1..0] bits set inductor peak current from 5.2 A to 6.8 A (NCV6356B), enabling precise overcurrent protection matching application inductor saturation |
Applications
| ADAS Vision Module Power | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers image signal processor (ISP) and CMOS sensor interface in automotive surround-view camera systems requiring tight voltage accuracy and fast load transients. IC Role / Device Role / Timing Role: Primary POL regulator delivering 1.15 V @ 4.5 A with ±1.5% DC accuracy and ±20 mV AC load regulation under 1.5 A step. Use Value: AOT control and 2.4 MHz switching minimize output ripple and inductor size, enabling integration into space-constrained camera housings. |
Use Scenario: Supplies CPU/GPU cores in automotive head-unit SoCs where dynamic performance scaling demands rapid, glitch-free voltage transitions. IC Role / Device Role / Timing Role: I²C-configurable DVS controller supporting sub-100 µs voltage slewing between 0.875 V and 1.15 V states per processor DVFS request. Use Value: VSEL pin hardware acceleration eliminates I²C latency, enabling real-time voltage updates synchronized with clock gating events. |
| Instrument Cluster Microcontroller | Radar Processor Subsystem |
Use Scenario: Regulates 1.2 V rail for cluster MCU and display controller in harsh temperature environments (−40 °C to +125 °C junction). IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified buck converter with thermal pre-warning interrupt (TPWTH = 105 °C) for early firmware throttling. Use Value: 60 µA PFM quiescent current extends battery backup runtime during vehicle sleep mode without compromising wake-up responsiveness. |
Use Scenario: Supplies 1.0 V core rail to millimeter-wave radar transceiver ICs with stringent EMI and transient immunity requirements. IC Role / Device Role / Timing Role: Synchronous buck with integrated FETs and optimized power loop minimizes radiated emissions; PG signal validates rail stability before RF activation. Use Value: Power Good assertion at 95% VOUT and fault deassertion at 90% VOUT provides deterministic sequencing for radar subsystem initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-AEC1-Z | 4.5 A max output, fixed 500 kHz–3 MHz frequency, no I²C interface, only resistor-programmed VOUT | Lacks DVS, thermal interrupts, and programmable current limit; suitable for static-voltage, cost-sensitive clusters | Choose when I²C control and multi-rail coordination are unnecessary and board space allows larger inductors |
| TPS6286418ARQYR | 6 A output, 1.8 V–5.5 V input, 2.4 MHz, I²C with DVS but no thermal warning interrupts or pre-warning threshold | Supports higher VIN and output current, but lacks AEC-Q100 qualification and three-tier thermal monitoring | Prefer for non-automotive industrial applications needing higher current and wider input range without automotive compliance |
Compared with MPQ4420AGL-AEC1-Z and TPS6286418ARQYR, the NCV6356BMTWTXG uniquely combines AEC-Q100 qualification, hardware-accelerated DVS via VSEL, and three-stage thermal interrupt hierarchy - making it the only option for safety-critical ADAS vision and radar subsystems requiring coordinated voltage and thermal management.
Availability
NCV6356BMTWTXG is available at Aetrix Electronics and suitable for automotive ADAS, infotainment, and instrument cluster applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for NCV6356BMTWTXG 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with deep expertise in power management and AEC-Q100-qualified solutions.
The NCV6356BMTWTXG belongs to onsemi's automotive-grade DC-DC converter product line, designed specifically for post-regulation power delivery in safety-critical ADAS, infotainment, and digital cluster systems demanding high efficiency, small footprint, and robust thermal management.
FAQ
What is the maximum output current capability of the NCV6356BMTWTXG and under what conditions?
The NCV6356BMTWTXG delivers up to 5.0 A continuous output current at ambient temperature (TA) ≤ 85 °C, validated with a 0.33 µH inductor and 2×22 µF output capacitance. At TA = 105 °C, output current is derated to 3.0 A. The actual achievable current depends on PCB thermal design, input voltage, and output voltage setting - with higher efficiency at 1.15 V than at 0.6 V due to reduced conduction losses.
How does the NCV6356BMTWTXG implement Dynamic Voltage Scaling (DVS)?
The NCV6356BMTWTXG supports DVS through two parallel mechanisms: (1) I²C register writes to PROGVSEL0/PROGVSEL1 for software-controlled transitions, and (2) hardware-accelerated switching via the VSEL pin, which bypasses I²C latency for immediate voltage changes. DVS ramp rate is programmable via DVS[1..0] bits in the TIME register, with controlled dV/dt during upward transitions and load-dependent decay during downward transitions.
What thermal protection features does the NCV6356BMTWTXG provide beyond basic shutdown?
Beyond thermal shutdown at 150 °C, the NCV6356BMTWTXG provides two proactive thermal alerts: a pre-warning interrupt at 105 °C (configurable via TPWTH bits) and a warning interrupt at 135 °C. Each generates an INTB signal and can be used by host processors to initiate thermal throttling, fan control, or performance state reduction before shutdown occurs - critical for maintaining functional safety in ADAS systems.
Can the NCV6356BMTWTXG operate without an I²C interface, and what functionality remains available?
Yes - the NCV6356BMTWTXG operates fully in standalone mode using only EN and VSEL pins. Output voltage is selected between two factory-programmed values (e.g., 1.200 V for NCV6356B), enable/disable is controlled by EN, and DVS transitions occur via VSEL toggling. I²C is optional and required only for fine-grained voltage programming (6.25 mV steps), register-level current limiting, timing configuration, or reading thermal status registers.
What is the significance of the "B" suffix in NCV6356BMTWTXG, and how does it affect output voltage configuration?
The "B" in NCV6356BMTWTXG denotes the factory-programmed default output voltage pair: 1.200 V / 1.200 V (per marking diagram). This defines the two VOUT levels selectable via the VSEL pin. When VSEL = LOW, PROGVSEL0 sets output voltage (default 1.200 V); when VSEL = HIGH, PROGVSEL1 sets output voltage (also 1.200 V for "B"). Other variants like "Q" offer asymmetric pairs (e.g., 0.875 V / 0.906 V) for asymmetric DVS profiles.
NCV6356BMTWTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.4V
- Current - Output:
- 5A
- Frequency - Switching:
- Up to 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-WDFNW (4x3)
NCV6356BMTWTXG FAQ
1.How can I place an order for NCV6356BMTWTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV6356BMTWTXG 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 NCV6356BMTWTXG reliable?
The price and inventory of NCV6356BMTWTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV6356BMTWTXG is usually 5 days.
3.What payment methods are accepted for NCV6356BMTWTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV6356BMTWTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV6356BMTWTXG?
NCV6356BMTWTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV6356BMTWTXG 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 NCV6356BMTWTXG?
For technical support, including NCV6356BMTWTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV6356BMTWTXG requirements.
6.How does Aetrix verify that NCV6356BMTWTXG is sourced from the original manufacturer or authorized distributors?
All NCV6356BMTWTXG 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 NCV6356BMTWTXG meets industry standards.
7.What is the process for return or replacement of NCV6356BMTWTXG?
All NCV6356BMTWTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCV6356BMTWTXG, 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 NCV6356BMTWTXG part is unused and in its original packaging.
Return procedure for NCV6356BMTWTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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