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onsemi NCP6343BFCCT1G
- Part No.:
- NCP6343BFCCT1G
- Manufacturer:
- onsemi
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
NCP6343BFCCT1G.pdf
- Description:
- IC REG BUCK PROG 3A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
NCP6343BFCCT1G from onsemi is a configurable 3.0 A synchronous step-down DC-DC converter optimized for core processor and memory power in single-cell Li-ion or triple-cell alkaline/NiMH portable systems. It delivers programmable output voltage from 0.6 V to 1.4 V in 6.25 mV steps, operates at 3 MHz switching frequency, supports I²C-based dynamic voltage scaling (DVS), and integrates modular driver stages for load-adaptive efficiency - deployed in smartphones and webtablets.
For engineers reviewing the NCP6343BFCCT1G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed I²C register-controlled operation modes (PWM/PFM/forced PWM), thermal warning thresholds (105°C pre-warning, 135°C warning, 150°C shutdown), and real-world transient response data (±41–52 mV under 1.0–2.3 A load steps).
Technical Context
The NCP6343BFCCT1G implements voltage-mode control with integrated high-side (36 mΩ typ.) and low-side (19 mΩ typ.) MOSFETs, enabling CCM/PWM operation at medium-to-high loads and automatic transition to DCM/PFM at light loads for quiescent current as low as 35 µA. Its 3 MHz fixed-frequency oscillator eliminates external timing components and enables use of compact 470 nH inductors and 22 µF ceramic output capacitors.
I²C interface (up to 3.4 MHz) configures all key parameters: output voltage (VOUT[6:0]), peak current limit (IPEAK[1:0] = 11 → 3.9 A), DVS ramp rates (DVSup/DVSdown), thermal thresholds (TPWTH), power-up delay (DELAY[2:0]), and discharge enable (DISCHG). The device supports transient load helper functionality by sharing an output rail with another DC-DC without sinking current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.0 A max (IPEAK[1:0] = 11); supports processor core rail with burst-load capability |
| Input Voltage Range | 2.3 V to 5.5 V; compatible with single-cell Li-ion (2.7–4.2 V) and 5 V system rails |
| Output Voltage Range | 0.6 V to 1.4 V in 6.25 mV steps; covers ARM Cortex-A/R core and LPDDR2/3 I/O supply needs |
| Switching Frequency | 3.0 MHz ±10%; enables <1 mm profile solutions using 0.47 µH inductor and 0603 MLCCs |
| Quiescent Current | 35 µA typ. in PFM mode; extends battery runtime during display-off or idle states |
| Thermal Protection | 150°C shutdown with 30°C hysteresis; 135°C warning and 105°C pre-warning via I²C interrupt |
| I²C Interface | Standard-mode/fast-mode compatible (≤3.4 MHz); supports DVS, fault reporting, and configuration persistence |
Pinout & Package
Package: 15-pin WLCSP (1.99 × 1.34 mm, 0.4 mm pitch), Case 567GB, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Analog Supply Input | Provides analog/digital bias; must match PVIN; decoupled with 1.0 µF ceramic capacitor |
| AGND | Analog Ground | Reference node for feedback and I²C; connects to system ground at single point only |
| EN | Enable Control | Active-high digital input; initiates power-up sequence; must not float |
| SCL / SDA | I²C Clock / Data | Bi-directional interface for configuration, DVS, and thermal interrupt reporting |
| PVIN (A1,B1,C1) | Power Input | High-current switch supply input; requires local 10 µF ceramic decoupling |
| SW (A2,B2) | Switch Node | Drives external inductor; dual pins reduce trace inductance and thermal resistance |
| PGND (A3,B3,C3,C2,D1,E1) | Power Ground | High-switching-current return path; requires local ground plane connecting all pins |
| FB | Feedback Input | Connects directly to output capacitor positive terminal (not plane) for accurate regulation |
Key Features
| Feature | Design Value |
|---|---|
| Modular Output Stage | 8 independently enabled driver modules scale conduction losses to actual load (2.0/2.5/3.0 A variants) |
| Transient Load Helper | Shares output rail with secondary DC-DC without reverse current; avoids rail collapse during CPU burst loads |
| Dynamic Voltage Scaling | Smooth DVS transitions (6.25 mV/0.166 s up, 6.25 mV/2.666 s down) prevent processor glitches during frequency scaling |
| Active Output Discharge | Configurable discharge path (DISCHG bit) ensures safe rail discharge within 100 µs after battery insertion |
| Ultra-Low Off-Mode Current | 0.8 µA typ. (IOFF); critical for long-term storage and zero-power standby in always-on sensors |
Applications
| Smartphone Application | Webtablet Core Power |
|---|---|
Use Scenario: Dual-core ARM processor with dynamic frequency scaling requiring rapid voltage changes between 0.8 V (idle) and 1.225 V (performance mode). IC Role / Device Role / Timing Role: Primary core voltage regulator with I²C-controlled DVS and thermal interrupt signaling to AP subsystem. Use Value: Enables sub-100 µs voltage transitions while maintaining ±1% output accuracy across −40°C to +85°C ambient. |
Use Scenario: LPDDR3 memory I/O supply needing stable 1.2 V with fast transient response to burst read/write cycles. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 3.0 A peak current with 3 MHz switching to minimize EMI near RF sections. Use Value: Achieves >90% efficiency at 1.5 A load with ±41 mV undershoot/overshoot during 1.0–2.3 A load steps. |
| Portable SoC Subsystem | Battery-Powered IoT Hub |
Use Scenario: Multi-rail SoC integrating CPU, GPU, and ISP, each requiring independent, dynamically scaled voltages. IC Role / Device Role / Timing Role: Configurable slave in I²C power management tree; coordinates rail sequencing and thermal throttling with host PMIC. Use Value: Provides hardware-enforced thermal pre-warning (105°C) and warning (135°C) interrupts to trigger software-based DVFS backoff before shutdown. |
Use Scenario: Always-on sensor hub powered by coin cell or small Li-ion, requiring ultra-low quiescent current and reliable cold-start capability. IC Role / Device Role / Timing Role: Primary system regulator with UVLO (2.3 V) and hysteresis (60–200 mV) ensuring clean start-up from depleted batteries. Use Value: Delivers 35 µA PFM quiescent current and 0.8 µA off-mode current to extend shelf life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2143GQ-Z | 2.5 A max output; no I²C interface; fixed 1.2 V or resistor-programmable output; 2 MHz switching | Lacks DVS, thermal interrupts, and rail-sharing capability; suited for cost-sensitive fixed-voltage rails | Select when I²C control and multi-voltage sequencing are unnecessary and BOM cost is prioritized over feature flexibility |
| TPS6286418RTER | 3 A output; I²C-compatible; 4 MHz switching; 0.6–1.95 V range; integrated telemetry (VOUT/IOUT/temperature) | Higher voltage range and telemetry support enable closed-loop adaptive power management not available in NCP6343BFCCT1G | Select when real-time output monitoring and wider VOUT range (e.g., for DDR5) are required, accepting larger 2.0 × 1.7 mm QFN package |
Compared with MP2143GQ-Z and TPS6286418RTER, the NCP6343BFCCT1G uniquely balances ultra-compact WLCSP footprint, I²C-configurable DVS with sub-µs timing control, and dedicated transient load helper functionality - making it optimal for space-constrained mobile processors where rail coordination and thermal predictability are critical.
Availability
NCP6343BFCCT1G is available at Aetrix Electronics and suitable for smartphone power delivery, webtablet core voltage regulation, and portable SoC subsystems requiring stable component supply, consistent thermal behavior, and I²C-based dynamic voltage scaling.
Supply support for NCP6343BFCCT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP6343BFCCT1G belongs to onsemi's configurable power management IC portfolio, designed specifically for high-density portable electronics requiring programmable, thermally robust, and I²C-coordinated DC-DC conversion.
FAQ
What is the default output voltage and current rating for the NCP6343BFCCT1G?
The NCP6343BFCCT1G is factory-configured with a default output voltage of 1.225 V and a maximum output current of 3.0 A (IPEAK[1:0] = 11). This matches the "B" variant per onsemi's ordering matrix and is confirmed in Table 7 (Default Configurations) of the datasheet. The device maintains ±1% DC accuracy across full load and temperature range.
Does the NCP6343BFCCT1G support dynamic voltage scaling (DVS), and how is it implemented?
Yes, the NCP6343BFCCT1G supports hardware-assisted DVS via its I²C interface. Voltage transitions are executed with controlled slew rates: 6.25 mV per 0.166 s for upward steps and 6.25 mV per 2.666 s downward (default settings). The DVSMODE bit selects forced PWM (for precision) or auto mode (to avoid rail discharge), and DVS is initiated automatically upon VOUT register write.
What thermal protection features does the NCP6343BFCCT1G provide, and how are they signaled?
The NCP6343BFCCT1G provides three-tier thermal monitoring: pre-warning at 105°C, warning at 135°C, and shutdown at 150°C (all typical values). Each event triggers a dedicated I²C interrupt (TPREW, TWARN, TSD) readable via INT_ACK register. Thermal hysteresis is 6°C (pre-warning), 15°C (warning), and 30°C (shutdown) to prevent oscillation.
Can the NCP6343BFCCT1G operate as a transient load helper alongside another DC-DC converter?
Yes, the NCP6343BFCCT1G is explicitly designed to share an output rail with another DC-DC converter and act as a transient load helper. It sources current during load transients without sinking current on the shared rail - preventing rail collapse during CPU burst activity. This is confirmed in the device description, Figure 1, and Section "Transient Load Helper" in the datasheet.
What is the recommended inductor and capacitor set for the NCP6343BFCCT1G in a typical 1.225 V application?
For a 1.225 V output, onsemi recommends a 470 nH shielded inductor (e.g., PIFE20161B or SPM6530) and two 22 µF 0603 ceramic output capacitors (Cout), plus a 4.7 µF input capacitor (Cin). This combination achieves >90% efficiency at 1.5 A and meets transient response specs (±41–52 mV) per Figures 10–11 and Table 3.
NCP6343BFCCT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 15-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:
- 3A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLCSP (1.34x1.99)
NCP6343BFCCT1G FAQ
1.How can I place an order for NCP6343BFCCT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6343BFCCT1G 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 NCP6343BFCCT1G reliable?
The price and inventory of NCP6343BFCCT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6343BFCCT1G is usually 5 days.
3.What payment methods are accepted for NCP6343BFCCT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6343BFCCT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6343BFCCT1G?
NCP6343BFCCT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6343BFCCT1G 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 NCP6343BFCCT1G?
For technical support, including NCP6343BFCCT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6343BFCCT1G requirements.
6.How does Aetrix verify that NCP6343BFCCT1G is sourced from the original manufacturer or authorized distributors?
All NCP6343BFCCT1G 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 NCP6343BFCCT1G meets industry standards.
7.What is the process for return or replacement of NCP6343BFCCT1G?
All NCP6343BFCCT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP6343BFCCT1G, 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 NCP6343BFCCT1G part is unused and in its original packaging.
Return procedure for NCP6343BFCCT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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