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onsemi NCP6334CMTAATBG
- Part No.:
- NCP6334CMTAATBG
- Manufacturer:
- onsemi
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
NCP6334CMTAATBG.pdf
- Description:
- IC REG BUCK ADJ 2A 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,565
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Product details
Overview
NCP6334CMTAATBG from onsemi is a 3 MHz, 2 A synchronous buck converter optimized for portable systems powered by single-cell Li-ion or triple-cell alkaline/NiCd/NiMH batteries. It delivers externally adjustable output voltage (0.6 V to VIN), features automatic PFM/PWM mode selection via MODE pin, includes active output discharge and thermal shutdown, and targets point-of-load regulation in space-constrained mobile devices.
For engineers reviewing the NCP6334CMTAATBG datasheet, pinout, applications, or equivalent options, this page provides verified functional identity, validated WDFN-8 pin mapping, confirmed 3 MHz switching frequency and 2 A capability, and two technically documented alternative parts with explicit mode-control and power-good differences.
Technical Context
The NCP6334CMTAATBG implements voltage-mode control with input supply feedforward for stable operation across 2.3–5.5 V input range. Its integrated high-side P-MOSFET (130–200 mΩ) and low-side N-MOSFET (100–140 mΩ) enable synchronous rectification and cycle-by-cycle current limiting at 2.8 A typical peak.
Mode selection is controlled externally: MODE pin >1.1 V forces fixed-frequency PWM; <0.4 V enables automatic PFM/PWM transition. Unlike the NCP6334B variant, it lacks Power Good output but retains soft-start (0.4–1 ms), undervoltage lockout (2.3 V falling threshold), and active discharge via internal 500 Ω SW-to-PGND path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V) and triple-cell alkaline (3.0–4.5 V) without external regulators. |
| Output Current | Up to 2 A continuous - sufficient for core logic, memory, or RF subsystems in smartphones and portable media players. |
| Switching Frequency | 3.0 MHz ±10% - enables use of compact 0.47–4.7 µH inductors and ceramic capacitors under 22 µF. |
| Feedback Reference Voltage | 600 mV ±6 mV - sets output via resistor divider; allows precise 0.6–VIN adjustment with <±0.5%/A load regulation. |
| Quiescent Current | 5 mA (PWM), 30 µA (PFM) - minimizes battery drain during light-load standby in always-on functions. |
| Thermal Shutdown | 150°C threshold with 25°C hysteresis - protects die during sustained overload or poor PCB thermal design. |
| Package | WDFN-8, 2.0 × 2.0 × 0.75 mm, 0.5 mm pitch - ultra-thin footprint with exposed pad for thermal dissipation (RJA = 62°C/W). |
Pinout & Package
Package: WDFN-8 (Case 511BE), 2.0 mm × 2.0 mm × 0.75 mm body height, 0.5 mm lead pitch, exposed thermal pad (internally unconnected, must be soldered to system ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Primary return path for high-current switch node; must connect directly to low-impedance system ground plane. |
| 2 - SW | Switch Node | Drain connection of internal high-side MOSFET; drives inductor; high dv/dt node requiring minimized trace area. |
| 3 - AGND | Analog Ground | Reference for feedback, error amplifier, and internal bias; separate from PGND but tied at single point near IC. |
| 4 - FB | Feedback Input | Senses output voltage via resistor divider; 600 mV reference enables precise external VOUT programming. |
| 5 - EN | Enable Input | Active-high digital control (1.1 V min high, 0.4 V max low); includes 5 µs internal filter for noise immunity. |
| 6 - MODE | Mode Selection | External PWM/PSM control: high = forced PWM, low = automatic PFM/PWM; no Power Good function. |
| 7 - AVIN | Analog Supply | Bias supply for control circuitry; requires ≥1 µF ceramic bypass capacitor placed adjacent to pin. |
| 8 - PVIN | Power Input | Main input rail for power switches; requires ≥10 µF ceramic capacitor with low ESL/ESR, placed nearest to pin. |
| Exposed Pad | Thermal Pad | Not electrically connected; must be soldered to solid ground plane for thermal performance (RJB = 30°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PFM/PWM Transition | Enables >90% efficiency at 10 mA load while maintaining 3 MHz regulation at full 2 A - eliminates manual mode switching. |
| Active Output Discharge | Internal 500 Ω switch discharges output capacitor through SW pin when disabled - prevents residual voltage hold-up in multi-rail systems. |
| Voltage-Mode Feedforward Control | Compensates for input line variation in real time - maintains stable loop response across 2.3–5.5 V without external compensation tuning. |
| Integrated MOSFETs | 130 mΩ high-side + 100 mΩ low-side (at VIN = 3.6 V) - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Soft-Start Timing | 0.4–1 ms ramp-up (90% of target) - limits inrush current into output capacitors and avoids input rail sag during power-up. |
Applications
| Smartphone Subsystem Regulation | USB-Powered Portable Device |
|---|---|
Use Scenario: Powering application processor I/O or camera sensor rails in compact smartphone designs with strict height constraints. IC Role / Device Role / Timing Role: Point-of-load DC-DC regulator delivering 1.2 V @ 1.5 A with 3 MHz switching to minimize passive size. Use Value: 2.0 × 2.0 mm WDFN-8 package and 0.75 mm height enable integration beneath displays or within stacked PCB assemblies. |
Use Scenario: Regulating 3.3 V or 1.8 V from 5 V USB input in portable media players or Bluetooth headsets. IC Role / Device Role / Timing Role: Primary buck converter with automatic PFM mode to extend battery life during audio playback or standby. Use Value: 30 µA quiescent current in PFM mode extends runtime in always-on low-power states without sacrificing transient response. |
| Digital Still Camera Core Logic | Wireless Modem Baseband |
Use Scenario: Supplying image signal processor (ISP) or memory interface in DSLR-style digital cameras with burst-mode operation. IC Role / Device Role / Timing Role: High-efficiency synchronous buck providing 1.1 V @ 2 A with fast load transient recovery (<200 µs). Use Value: Cycle-by-cycle current limit (2.8 A peak) and 3 MHz frequency ensure stable output during rapid CPU clock scaling and sensor readout bursts. |
Use Scenario: Generating clean 1.2 V core voltage for LTE/Wi-Fi baseband ICs in compact modems with shared battery and thermal budget. IC Role / Device Role / Timing Role: Low-noise, high-PWM-efficiency regulator supporting dynamic voltage scaling during data transmission. Use Value: Synchronous rectification and feedforward control maintain >88% efficiency across 0.5–2 A load range, reducing heat generation near sensitive RF sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP6334BMTAATBG | Includes open-drain Power Good (PG) output; no MODE pin - uses internal auto-PWM/PFM only. | Required where system-level power sequencing or fault monitoring is needed (e.g., FPGA configuration, SoC reset assertion). | Select NCP6334BMTAATBG when PG signal is mandatory; NCP6334CMTAATBG is preferred when board space or external mode control is prioritized. |
| TPS62231DRYR | 2.25 MHz switching, 300 mA max output, different pinout (6-pin WSON), no MODE pin, fixed or resistor-programmable VOUT. | Targeted at ultra-low-power microcontrollers or sensors - insufficient for 2 A loads or external VOUT adjustment beyond factory-set options. | Choose TPS62231DRYR only for sub-500 mA applications needing TI's ecosystem support; not a functional replacement for NCP6334CMTAATBG's 2 A capability. |
Compared with NCP6334BMTAATBG, the NCP6334CMTAATBG trades Power Good functionality for external MODE control-enabling deterministic PWM forcing in noise-sensitive timing paths. Against TPS62231DRYR, it delivers 6.7× higher output current and full external voltage adjustability, making it suitable for demanding portable SoC rails rather than peripheral LDO replacements.
Availability
NCP6334CMTAATBG is available at Aetrix Electronics and suitable for smartphone subsystem regulation, USB-powered portable devices, and wireless modem baseband applications requiring stable component supply, consistent parametric performance, and long-term lifecycle availability.
Supply support for NCP6334CMTAATBG 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 portable electronics.
The NCP6334CMTAATBG belongs to onsemi's high-frequency synchronous buck converter product line, designed specifically for space-constrained, battery-powered portable systems requiring high efficiency across wide load ranges and minimal external components.
FAQ
What is the maximum output current capability of the NCP6334CMTAATBG?
The NCP6334CMTAATBG delivers up to 2 A continuous output current under typical thermal conditions (TA ≤ 85°C, proper PCB layout). Peak current limit is 2.8 A typical, with cycle-by-cycle protection preventing damage during short transients. Actual achievable current depends on input voltage, output voltage, ambient temperature, and PCB copper area used for thermal dissipation.
Does the NCP6334CMTAATBG include a Power Good output?
No, the NCP6334CMTAATBG does not include a Power Good output. That feature is exclusive to the NCP6334B variant (e.g., NCP6334BMTAATBG), which uses pin 6 as an open-drain PG signal. On the NCP6334CMTAATBG, pin 6 is the MODE input for external PWM/PSM selection - confirming its functional distinction from the B version.
How does the MODE pin function on the NCP6334CMTAATBG?
On the NCP6334CMTAATBG, the MODE pin (pin 6) controls operating mode: a voltage >1.1 V forces fixed-frequency PWM operation regardless of load; a voltage <0.4 V enables automatic transition between PFM (light load) and PWM (medium/heavy load). This allows designers to lock PWM for EMI-sensitive timing paths or optimize efficiency dynamically.
What package type and dimensions does the NCP6334CMTAATBG use?
The NCP6334CMTAATBG uses the WDFN-8 (Case 511BE) package: 2.0 mm × 2.0 mm body, 0.75 mm maximum height, 0.5 mm lead pitch, with an exposed thermal pad. The pad is electrically unconnected but must be soldered to a system ground plane to achieve specified thermal resistance (RJB = 30°C/W) and prevent junction overheating.
Can the NCP6334CMTAATBG operate from a 2.3 V input supply?
Yes, the NCP6334CMTAATBG supports input voltages from 2.3 V to 5.5 V. Its undervoltage lockout (UVLO) has a falling threshold of 2.3 V with 60–200 mV hysteresis, ensuring reliable startup from depleted single-cell Li-ion batteries (down to ~2.5 V) and triple-cell alkaline sources. Operation below 2.3 V disables regulation and places the device in shutdown.
NCP6334CMTAATBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (2x2)
NCP6334CMTAATBG FAQ
1.How can I place an order for NCP6334CMTAATBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6334CMTAATBG 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 NCP6334CMTAATBG reliable?
The price and inventory of NCP6334CMTAATBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6334CMTAATBG is usually 5 days.
3.What payment methods are accepted for NCP6334CMTAATBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6334CMTAATBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6334CMTAATBG?
NCP6334CMTAATBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6334CMTAATBG 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 NCP6334CMTAATBG?
For technical support, including NCP6334CMTAATBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6334CMTAATBG requirements.
6.How does Aetrix verify that NCP6334CMTAATBG is sourced from the original manufacturer or authorized distributors?
All NCP6334CMTAATBG 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 NCP6334CMTAATBG meets industry standards.
7.What is the process for return or replacement of NCP6334CMTAATBG?
All NCP6334CMTAATBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP6334CMTAATBG, 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 NCP6334CMTAATBG part is unused and in its original packaging.
Return procedure for NCP6334CMTAATBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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