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onsemi NCP6335FFCT1G
- Part No.:
- NCP6335FFCT1G
- Manufacturer:
- onsemi
- Package:
- 20-UFBGA, WLCSP
- Datasheet:
-
NCP6335FFCT1G.pdf
- Description:
- IC REG BUCK PROG 4A 20WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,263
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Product details
Overview
NCP6335FFCT1G from onsemi is a synchronous buck DC-DC converter optimized as a transient load helper for portable applications powered by single-cell Li-ion or triple-cell alkaline/NiCd/NiMH batteries. It delivers up to 4.0 A output current, supports I²C-programmable output voltage from 0.6 V to 1.4 V in 6.25 mV steps, operates at 3 MHz switching frequency, and integrates high-side (45 mΩ typ) and low-side (22 mΩ typ) MOSFETs in a WLCSP-20 package.
For engineers reviewing the NCP6335FFCT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3 MHz operation enabling compact 470 nH inductor + dual 22 µF capacitor design, modular driver architecture supporting configurable peak current (2.5–4.0 A), I²C-based dynamic voltage scaling (DVS), and integrated thermal warning/shutdown with programmable thresholds.
Technical Context
The NCP6335FFCT1G implements voltage-mode control with fully integrated synchronous rectification, automatic PWM/PFM mode transitions, and configurable forced-PWM operation via I²C. Its modular output stage uses nine parallel driver modules, individually enabled/disabled via the MODULE register to match load requirements and maximize efficiency across 0.1–4.0 A output range.
It supports dual-register voltage programming (PROGVSEL0/PROGVSEL1) selected by the VSEL pin and I²C bit VSELGT, enabling fast hardware-triggered DVS transitions. Thermal management includes three-tier protection: pre-warning (105°C default), warning (135°C), and shutdown (150°C with 30°C hysteresis), all signaled via dedicated interrupt outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 4.0 A - configurable via IPEAK[1..0] bits to match inductor saturation limits (2.5/3.0/3.5/4.0 A modes) |
| Input Voltage Range | 2.3 V to 5.5 V - supports direct connection to Li-ion battery (2.7–4.2 V) or 5 V rail without external LDO |
| Switching Frequency | 3.0 MHz ±5% - enables use of ultra-small 470 nH shielded inductor and thin-profile 0603 ceramic capacitors |
| Quiescent Current | 35 µA in PFM mode - extends battery life during light-load standby in smartphones and tablets |
| Output Voltage Accuracy | ±1% in PWM mode, ±2% in auto mode - ensures stable core voltage regulation under full load and line variation |
| Thermal Shutdown | 150°C typical with 30°C hysteresis - prevents irreversible damage while allowing safe recovery at ≤120°C junction temperature |
| I²C Interface Speed | Up to 3.4 MHz - supports rapid DVS updates and real-time telemetry without bus contention |
Pinout & Package
Package: WLCSP-20 (2.0 mm × 1.6 mm, 0.4 mm pitch, Case 568AG). Ultra-compact chip-scale package suitable for space-constrained mobile PCB layouts with minimal board area and height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Analog/Digital Supply Input | Provides power to internal analog and digital circuitry; must be decoupled with 1.0 µF ceramic capacitor near pin |
| AGND | Analog Ground Reference | Common ground for analog blocks (error amplifier, reference, ADC); requires star-point connection to PGND |
| EN | Enable Control Input | Active-high logic enable with internal pull-down; initiates power-up sequence and controls sleep/off mode entry |
| VSEL | Mode/Voltage Selection Input | Selects between PROGVSEL0/PROGVSEL1 registers for output voltage; enables hardware-triggered DVS without I²C latency |
| SCL / SDA | I²C Clock/Data Interface | Supports configuration, telemetry, and DVS commands; compatible with standard 3.3 V I²C buses up to 3.4 MHz |
| PGND (×8 pins) | Power Ground Return | Carries high-frequency switching current; requires local copper pour and single-point tie to AGND to minimize noise coupling |
| PVIN (×3 pins) | Switch Supply Input | High-current input for high-side FET; must be decoupled with 4.7 µF ceramic capacitor placed adjacent to pins |
| SW (×4 pins) | Switch Node Output | Connects directly to inductor; multiple pins reduce trace inductance and thermal resistance for 4 A peak current |
| FB | Feedback Voltage Input | Direct connection to output capacitor anode; senses regulated voltage for error amplifier without resistive divider |
| PG / INTB | Open-Drain Status Outputs | PG signals valid output voltage (90% threshold); INTB flags thermal events or faults; both require external pull-ups |
Key Features
| Feature | Design Value |
|---|---|
| Modular Driver Architecture | Nine independent output-stage modules enable fine-grained current scaling-reducing conduction loss at partial load while maintaining 4 A capability at full load |
| Transient Load Helper Function | Shares output rail with primary DC-DC without sinking current-provides instantaneous current boost during CPU burst loads without destabilizing main regulator |
| Programmable DVS Timing | Configurable dV/dt (6.25 mV per 0.166 s for up-slew, 2.666 s for down-slew) prevents processor brown-out or timing violations during voltage transitions |
| Active Output Discharge | On-chip discharge path (25–35 Ω) clears residual rail voltage within milliseconds after shutdown-meets system-level safety and sequencing requirements |
| Multi-Tier Thermal Management | Three independent thresholds (105°C pre-warning, 135°C warning, 150°C shutdown) allow software-driven thermal mitigation before hardware intervention |
Applications
| Smartphone Application Processor Core | Tablet SoC Dynamic Power Rail |
|---|---|
|
Use Scenario: Supplies CPU/GPU cores in high-performance smartphone SoCs requiring rapid voltage changes during performance state transitions. IC Role / Device Role / Timing Role: Transient load helper co-regulating with main PMIC; provides instantaneous current injection during 0.1–1.6 A load steps with ±40 mV deviation. Use Value: Maintains stable core voltage during DVFS transitions without requiring oversized bulk capacitance or slower-response primary regulator. |
Use Scenario: Powers application processor subsystems in webtablets where battery runtime and thermal envelope are tightly constrained. IC Role / Device Role / Timing Role: Standalone 4 A buck converter delivering 1.15 V core voltage; leverages 3 MHz switching to minimize solution footprint and height. Use Value: Enables use of 0603-size 22 µF X5R capacitors and 470 nH inductors-reducing total solution volume by >35% vs. 1 MHz alternatives. |
| Portable Device Battery Backup Rail | Low-Power IoT MCU Subsystem |
|
Use Scenario: Provides auxiliary power rail for memory retention and real-time clock during main system shutdown in handheld devices. IC Role / Device Role / Timing Role: Configured in low-quiescent-current PFM mode (35 µA) with 0.6 V output; activated only during battery backup events. Use Value: Extends backup runtime by minimizing static current draw while retaining full I²C configurability for voltage reprogramming. |
Use Scenario: Supplies sensor hub or wireless MCU in battery-powered IoT nodes requiring long-term operation on coin cells. IC Role / Device Role / Timing Role: Delivers 1.39375 V at up to 3.0 A peak; uses modular driver to scale active modules down to 1–2 for microamp-level idle current. Use Value: Achieves >85% efficiency at 1 mA load (−40°C to +85°C), directly extending battery life without external bias optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62400DRVR | 2.5 A max output, 2.25 MHz switching, no I²C interface - uses resistor-based VOUT setting and GPIO mode control | Lacks DVS and thermal telemetry; suitable for fixed-voltage, cost-sensitive designs without dynamic scaling needs | Choose when I²C complexity is unnecessary and 2.5 A output suffices; avoids firmware integration overhead |
| RTQ2132BWGE | 4 A output, 2.5 MHz, I²C-compatible but no modular driver or transient helper mode; higher IQ (65 µA PFM) | Does not support rail-sharing transient assistance; lacks pre-warning thermal interrupts and programmable DVS slew rates | Prefer for general-purpose 4 A buck where advanced thermal management and hardware-triggered DVS are not required |
Compared with TPS62400DRVR and RTQ2132BWGE, the NCP6335FFCT1G uniquely combines 4 A capability, 3 MHz operation, I²C-based DVS with hardware-accelerated transitions, and dedicated transient load helper functionality-making it optimal for high-performance portable SoC power delivery where responsiveness, density, and thermal intelligence are critical.
Availability
NCP6335FFCT1G is available at Aetrix Electronics and suitable for smartphone processor core supplies, tablet SoC power rails, and portable device battery backup systems requiring stable component supply, tight voltage accuracy, and rapid transient response.
Supply support for NCP6335FFCT1G 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 electronics, delivering high-performance power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and portable markets.
The NCP6335FFCT1G belongs to onsemi's portable power management IC family, engineered specifically for high-density, thermally constrained mobile applications requiring dynamic voltage scaling, ultra-low quiescent current, and seamless integration with application processors.
FAQ
What is the maximum output current capability of the NCP6335FFCT1G?
The NCP6335FFCT1G delivers up to 4.0 A continuous output current. This is achieved through its modular driver architecture, where the peak inductor current limit is set via IPEAK[1..0] bits in the LIMCONF register-configuring values of 3.4 A (2.5 A mode), 4.0 A (3.0 A), 4.4 A (3.5 A), or 5.0 A (4.0 A). The actual sustained output depends on thermal conditions and PCB layout, with thermal shutdown activating at 150°C junction temperature.
How does the NCP6335FFCT1G function as a transient load helper?
The NCP6335FFCT1G operates as a transient load helper by sharing the same output rail with another DC-DC converter-supplying instantaneous current during sudden load steps without sinking current from the rail. It monitors rail voltage and activates its output stage only when needed, reducing voltage droop during CPU burst loads (e.g., 0.1–1.6 A steps with ±40 mV deviation). This eliminates the need for oversized bulk capacitance on the primary regulator's output.
Can the NCP6335FFCT1G be used without I²C communication?
Yes, the NCP6335FFCT1G supports pin-strapped operation without I²C. Output voltage is selected via the VSEL pin (choosing between two factory-programmed registers), enable/disable is controlled by the EN pin, and operating mode (PWM/PFM) defaults to auto-switching. I²C is optional for advanced features like dynamic voltage scaling, thermal telemetry, module configuration, and fine-grained register control-but basic regulation functions fully operate using only digital inputs.
What package type and dimensions does the NCP6335FFCT1G use?
The NCP6335FFCT1G uses a WLCSP-20 (Wafer-Level Chip-Scale Package) with mechanical dimensions of 2.0 mm × 1.6 mm and 0.4 mm pitch. It conforms to Case 568AG and features 20 solder bumps arranged in a 5×4 grid. This ultra-compact, low-profile package minimizes PCB area and height-critical for slim mobile devices-and requires careful attention to solder paste volume and reflow profile due to its bump-based interconnect.
Does the NCP6335FFCT1G support dynamic voltage scaling (DVS)?
Yes, the NCP6335FFCT1G fully supports dynamic voltage scaling via its I²C interface. Output voltage can be reprogrammed in 6.25 mV steps from 0.6 V to 1.4 V, with configurable slew rates: 6.25 mV per 0.166 s for upward transitions and per 2.666 s for downward transitions (set via DVS[1..0] bits). Hardware-triggered DVS is also possible by toggling the VSEL pin, bypassing I²C latency for fastest response.
NCP6335FFCT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 20-UFBGA, WLCSP
- 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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.4V
- Current - Output:
- 4A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLCSP (1.62x2.02)
NCP6335FFCT1G FAQ
1.How can I place an order for NCP6335FFCT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6335FFCT1G 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 NCP6335FFCT1G reliable?
The price and inventory of NCP6335FFCT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6335FFCT1G is usually 5 days.
3.What payment methods are accepted for NCP6335FFCT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6335FFCT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6335FFCT1G?
NCP6335FFCT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6335FFCT1G 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 NCP6335FFCT1G?
For technical support, including NCP6335FFCT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6335FFCT1G requirements.
6.How does Aetrix verify that NCP6335FFCT1G is sourced from the original manufacturer or authorized distributors?
All NCP6335FFCT1G 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 NCP6335FFCT1G meets industry standards.
7.What is the process for return or replacement of NCP6335FFCT1G?
All NCP6335FFCT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP6335FFCT1G, 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 NCP6335FFCT1G part is unused and in its original packaging.
Return procedure for NCP6335FFCT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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