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onsemi NCP3134MNTXG
- Part No.:
- NCP3134MNTXG
- Manufacturer:
- onsemi
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
NCP3134MNTXG.pdf
- Description:
- IC REG BUCK ADJ 4A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,171
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Product details
Overview
NCP3134MNTXG from onsemi is a fully integrated 4 A synchronous buck converter optimized for 3.3 V and 5 V step-down power conversion in space-constrained applications. It features voltage-mode control, dual operation modes (FCCM and automatic CCM/DCM), 2.2 MHz switching frequency, internal 600 mV reference with ±1% tolerance, and integrated power-good indicator. It delivers up to 4 A continuous output current from a 2.9–5.5 V input, supporting pre-bias startup and output discharge.
For engineers reviewing the NCP3134MNTXG datasheet, pinout, applications, or equivalent options, key selection criteria include its 3 mm × 3 mm QFN16 package, mode-selectable efficiency optimization, 1.0 ms internal soft-start, over-voltage/under-voltage/over-current protection, and compatibility with MLCC output capacitors in high-density DC-DC designs.
Technical Context
The NCP3134MNTXG implements voltage-mode PWM control with an internal 2.2 MHz oscillator and adaptive zero-crossing detection for seamless CCM/DCM transition. Its dual-mode operation-configured via the PS pin-enables either fixed-frequency FCCM (for EMI-sensitive or regulation-critical systems) or automatic light-load skipping (for peak efficiency at partial load).
Protection architecture includes cycle-by-cycle high-side OCP (5.2 A typ), latched low-side OCP (7.8 A), thermal shutdown at 160°C with 10°C hysteresis, UVLO on both VIN and VDD (2.8 V threshold), and window-based power-good monitoring with ±17% FB tolerance and 200 µs delay. The integrated 20 Ω output discharge transistor enables controlled soft-stop during disable or fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 4 A continuous - supports compact single-rail POL for FPGA I/O, ASIC cores, and SoC subsystems. |
| Input Voltage Range | 2.9 V to 5.5 V - compatible with single-cell Li-ion, USB PD, and standard 3.3 V/5 V system rails. |
| Switching Frequency | 2.2 MHz (FCCM mode) - enables use of small external inductors (<1 µH) and minimizes audible noise. |
| Reference Voltage | 600 mV ±1% - sets precise output regulation (e.g., 1.2 V via 1:1 resistor divider) without external trimming. |
| Soft-Start Time | 1.0 ms typical - limits inrush current into bulk output capacitance during power-up. |
| Operating Modes | FCCM or automatic CCM/DCM - selectable via PS pin; DCM extends light-load efficiency without external controller. |
| Protections | OVP/UVP (±17% FB window), thermal shutdown (160°C), latch-off OCP, pre-bias startup - ensures robust operation under fault and transient conditions. |
Pinout & Package
Package: 3 mm × 3 mm, 16-pin QFN (Case 485DA) with exposed thermal pad; RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Active-high logic input; internally pulled up to VDD (1.35 MΩ); asserts internal soft-start when high. |
| 2 NC | No-connect terminal | Not bonded; must remain unconnected per datasheet to avoid parasitic coupling. |
| 3 PGD | Open-drain power-good output | Signals valid regulation (FB within ±17%); sinks up to 5 mA; de-asserts within 10 µs on fault or EN low. |
| 4 VBST | Bootstrap supply for high-side gate driver | Requires ceramic capacitor (typically 0.1 µF) between VBST and SW to sustain high-side FET drive above VIN. |
| 5–7 SW | Power switch node | Common connection point for integrated high- and low-side MOSFETs; carries full switching current and high dv/dt. |
| 8 PS | Mode selection input | Configures operation: floating/VDD = FCCM; ≤174 kΩ to PGND = automatic CCM/DCM. |
| 9 COMP | Error amplifier output | Compensation node for Type II/III loop filter; connects to external RC network for stability tuning. |
| 10 FB | Feedback input | Monitors output via resistor divider; referenced to 600 mV internal VREF; supports adjustable output from 0.12×VIN to 0.80×VIN. |
| 11 AGND | Analog ground reference | Separate ground for feedback, compensation, and reference circuits; must be tied to PGND at single point. |
| 12 VDD | Control circuit power supply | Supplies bias for internal logic, drivers, and references; accepts 2.9–5.5 V; shares UVLO with VIN. |
| 13–14 VIN | Main power input | Supplies gate drivers and power stage; requires local 10 µF ceramic decoupling close to pins. |
| 15–16 PGND | Power ground return | High-current return path for MOSFETs and SW node; connects to thermal pad for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual MOSFET power stage | Eliminates external high-side/low-side FETs and associated gate-drive complexity; reduces BOM count and layout area. |
| MLCC-compatible output design | Stable with low-ESR ceramic capacitors only - no electrolytic or tantalum required, improving reliability and temperature range. |
| Pre-bias startup support | Enables safe start-up into pre-charged outputs (e.g., hot-swap or multi-rail sequencing), preventing reverse current flow. |
| Internal 20 Ω output discharge | Actively discharges VOUT when disabled or faulted - avoids residual voltage hold-up that could interfere with downstream logic sequencing. |
| 1.0 ms internal soft-start | Linear ramp of internal reference eliminates need for external soft-start circuitry while ensuring monotonic output rise. |
| QFN16 3×3 mm footprint | Minimizes PCB area vs. SOIC or larger QFN packages; thermal pad enables >2 W dissipation in compact layouts. |
Applications
| Point-of-Load Regulation for FPGA I/O Banks | USB-C Power Delivery Sink Rail |
|---|---|
Use Scenario: Delivering stable 1.8 V or 1.2 V to FPGA I/O banks with fast load transients and tight voltage tolerance. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated POL voltage; handles up to 4 A peak current with <100 µs transient response. Use Value: Automatic CCM/DCM mode maintains >92% efficiency at 100 mA load while FCCM ensures consistent 2.2 MHz switching for EMI filtering predictability. |
Use Scenario: Stepping down 5 V USB-C bus voltage to 3.3 V for microcontroller, USB PHY, and interface logic in portable devices. IC Role / Device Role / Timing Role: Compact, self-contained buck converter with integrated protections - replaces discrete controller + MOSFET solution. Use Value: Pre-bias startup prevents reverse current when 3.3 V rail is held by backup LDO; PGD signal enables host MCU to verify rail readiness before enumeration. |
| Industrial Sensor Node Power Supply | Automotive Infotainment Core Logic Rail |
Use Scenario: Powering ultra-low-power sensor fusion processors (e.g., ARM Cortex-M4) in battery-backed industrial nodes. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter operating across wide input range (2.9–5.5 V) as battery voltage drops. Use Value: Light-load DCM operation achieves <85% efficiency at 10 mA, extending battery life; thermal shutdown protects against enclosure overheating. |
Use Scenario: Generating 1.1 V core supply for automotive-grade application processors in infotainment head units. IC Role / Device Role / Timing Role: Robust POL regulator meeting AEC-Q100 stress requirements when paired with automotive-grade passives. Use Value: Dual OCP (high-side + latched low-side), ±17% UVP/OVP, and 160°C thermal cutoff ensure fail-safe behavior in harsh under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | 3 A rated, 2.2 MHz, no PGD output, no pre-bias startup, smaller 2×2 mm QFN | Lacks power-good signaling and pre-bias capability - unsuitable for sequenced or hot-plug systems. | Select when cost and size are critical and 3 A output suffices; verify absence of PGD does not impact system boot integrity. |
| TPS54332DR | 3 A, 1 MHz max, external MOSFETs required, wider 3.5–28 V input, no integrated BST diode | Higher input range but requires external FETs and bootstrap components - increases BOM and layout complexity. | Choose for higher-input industrial rails where 28 V tolerance is needed; avoid if board space or component count is constrained. |
Compared with MP2315DJ-LF-Z and TPS54332DR, the NCP3134MNTXG uniquely combines 4 A output, integrated PGD, pre-bias startup, and MLCC-only stability in a 3×3 mm QFN - making it optimal for compact, high-reliability 3.3/5 V POL designs requiring full protection and sequencing support.
Availability
NCP3134MNTXG is available at Aetrix Electronics and suitable for FPGA power delivery, USB-C sink regulation, and industrial sensor node power conversion requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for NCP3134MNTXG 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCP3134MNTXG belongs to onsemi's high-density integrated DC-DC converter product line, designed specifically for space-constrained, high-efficiency point-of-load applications in computing, consumer, and industrial electronics.
FAQ
What is the maximum continuous output current supported by the NCP3134MNTXG?
The NCP3134MNTXG supports up to 4 A continuous output current under recommended operating conditions (TA ≤ 105°C, proper PCB thermal design). This rating assumes adequate heatsinking via the exposed thermal pad and use of low-ESR MLCC output capacitors. Peak current capability exceeds 5.2 A before high-side OCP triggers, but sustained operation above 4 A requires derating based on ambient temperature and airflow.
Does the NCP3134MNTXG support pre-bias startup, and how is it implemented?
Yes, the NCP3134MNTXG supports pre-bias startup. When the output is pre-charged, the device holds the low-side MOSFET off until the internal soft-start ramp reaches the FB pin voltage, preventing reverse current flow into the output capacitor. This behavior is inherent to the control architecture and requires no external configuration - it activates automatically whenever EN is asserted while VOUT > 0 V.
How does the PS pin configure operation mode in the NCP3134MNTXG?
The PS pin selects between Forced Continuous Conduction Mode (FCCM) and Automatic CCM/DCM. When PS is floating or pulled to VDD, NCP3134MNTXG operates in FCCM with fixed 2.2 MHz switching. When PS is connected to PGND through ≤174 kΩ, it enables automatic mode: the converter skips pulses at light load to reduce switching losses while maintaining fast transient response during load steps.
What protection features are integrated into the NCP3134MNTXG?
The NCP3134MNTXG integrates over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP) on both high- and low-side FETs, thermal shutdown (160°C), input UVLO on VIN and VDD, and output discharge via internal 20 Ω transistor. All protections except UVLO are latched, requiring EN toggle or power cycle to reset - ensuring system safety during fault conditions.
Can the NCP3134MNTXG operate with only ceramic output capacitors?
Yes, the NCP3134MNTXG is explicitly designed for MLCC-only output capacitance. Its voltage-mode control and internal compensation are optimized for low-ESR ceramic capacitors, eliminating the need for electrolytic or tantalum types. This improves reliability, reduces footprint, and enables stable operation across −40°C to +125°C ambient temperatures without ESR-related instability.
NCP3134MNTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-VFQFN 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):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.62V
- Current - Output:
- 4A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
NCP3134MNTXG FAQ
1.How can I place an order for NCP3134MNTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3134MNTXG 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 NCP3134MNTXG reliable?
The price and inventory of NCP3134MNTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3134MNTXG is usually 5 days.
3.What payment methods are accepted for NCP3134MNTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3134MNTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3134MNTXG?
NCP3134MNTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3134MNTXG 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 NCP3134MNTXG?
For technical support, including NCP3134MNTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3134MNTXG requirements.
6.How does Aetrix verify that NCP3134MNTXG is sourced from the original manufacturer or authorized distributors?
All NCP3134MNTXG 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 NCP3134MNTXG meets industry standards.
7.What is the process for return or replacement of NCP3134MNTXG?
All NCP3134MNTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3134MNTXG, 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 NCP3134MNTXG part is unused and in its original packaging.
Return procedure for NCP3134MNTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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