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onsemi NCP6354BMTAATBG
- Part No.:
- NCP6354BMTAATBG
- Manufacturer:
- onsemi
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
NCP6354BMTAATBG.pdf
- Description:
- IC REG BUCK ADJ 2A 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,918
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Product details
Overview
NCP6354BMTAATBG from onsemi is a 3 MHz, 2 A synchronous buck DC-DC 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 power good (PG) output and enable (EN) control, and operates in a compact WDFN-8 (2.0 × 2.0 × 0.75 mm) package with exposed thermal pad.
For engineers reviewing the NCP6354BMTAATBG datasheet, pinout, applications, or equivalent options, key selection considerations include its 3 MHz fixed-frequency PWM operation, 2.3–5.5 V input range, integrated high- and low-side MOSFETs (RON_H = 140 mΩ typ, RON_L = 110 mΩ typ), soft-start timing (0.4–1 ms), and active output discharge during disable.
Technical Context
The NCP6354BMTAATBG employs feedforward-controlled fixed-frequency PWM with cycle-by-cycle current limiting (ILIM = 2.8 A typ) and thermal shutdown at 150°C. Its dual-ground architecture separates PGND (power path) and AGND (analog reference) to minimize noise coupling into the 600 mV ±6 mV FB reference.
It integrates complementary P-MOSFET (high-side) and N-MOSFET (low-side) switches with internal gate drivers, supports external feedback via resistor divider (R1/R2), and uses an open-drain PG output with 90% VFB threshold and 3% hysteresis to signal regulation status after 1.15 ms startup delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V - supports full discharge of single-cell Li-ion (2.7–4.2 V) and triple-cell alkaline (3.0–4.5 V) without dropout. |
| Switching Frequency | 3.0 MHz ±0.3 MHz - enables use of sub-2.2 µH inductors and 4.7–22 µF ceramic output capacitors for ultra-compact designs. |
| Max Output Current | 2.0 A continuous - sustained delivery under thermal limits with proper PCB layout and thermal vias to exposed pad. |
| FB Reference Voltage | 600 mV ±6 mV - sets output voltage accuracy; VOUT = 0.6 V × (1 + R1/R2), enabling precise point-of-load regulation. |
| Power Good Threshold | 90% of FB voltage (±3%) - asserts PG high only when output is within ±10% of target, ensuring reliable system sequencing. |
| Quiescent Current | 5 mA typ at 3.6 V - maintains efficiency in active mode while supporting dynamic load response in battery-powered devices. |
| Shutdown Current | 1 µA max - minimizes battery drain during system sleep or standby states. |
Pinout & Package
The NCP6354BMTAATBG is housed in a thermally enhanced WDFN-8 (Case 511BE) package measuring 2.0 × 2.0 × 0.75 mm with 0.5 mm pitch and an exposed thermal pad (Pin 9) that must be soldered to system ground for optimal power dissipation (RJB = 30 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Low-impedance return path for high-current switching node (SW); must connect directly to PCB ground plane under IC. |
| 2 - SW | Switch Node | Drain connection of internal high-side P-MOSFET and source of low-side N-MOSFET; drives external inductor. |
| 3 - AGND | Analog Ground | Reference ground for FB, AVIN, and internal error amplifier; isolated from PGND except at single-point star connection. |
| 4 - FB | Feedback Input | Senses output voltage via external resistor divider; internal 600 mV reference enables precise VOUT programming. |
| 5 - EN | Enable Input | Digital logic input (1.1 V high threshold, 0.4 V low threshold); controls startup/shutdown with internal 5 µs filter. |
| 6 - PG | Power Good Output | Open-drain output indicating regulation status; pulled low if VOUT falls below 90% of target or during startup. |
| 7 - AVIN | Analog Supply | Bias supply for internal analog/digital circuitry; requires ≥1 µF ceramic bypass capacitor placed adjacent to pin. |
| 8 - PVIN | Power Input | Main input supply for power switches; requires ≥10 µF ceramic decoupling capacitor with minimal loop area. |
| 9 - PAD | Exposed Thermal Pad | Internally unconnected but critical for thermal performance; must be soldered to solid ground plane with ≥4 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated high-side P-MOSFET and low-side N-MOSFET reduce conduction losses vs. diode-based buck, enabling >90% peak efficiency at 1.8 V/1 A (VIN = 3.6 V). |
| Active Output Discharge | Internal 500 Ω (typ) discharge path from SW to PGND ensures rapid VOUT collapse (<10 ms) when EN is deasserted - critical for safe power sequencing. |
| Input Feedforward Control | Compensates for input voltage variation in real time, maintaining stable duty cycle and minimizing line regulation error across 2.3–5.5 V input range. |
| Soft Start | Controlled 0.4–1 ms output ramp prevents inrush current spikes during enable, protecting input capacitors and upstream power sources. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C (typ) and re-enables only after die cools to 125°C (25°C hysteresis), preventing thermal cycling and ensuring robust overtemperature recovery. |
Applications
| Smartphone Subsystem Power | USB-Powered Peripheral |
|---|---|
Use Scenario: Powers application processor I/O rails or camera sensor core voltage in space-constrained smartphone mainboard. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1.2 V @ 1.5 A from 3.6 V battery with tight transient response. Use Value: 3 MHz switching enables <2.2 µH inductor and 10 µF output cap, reducing solution footprint by >40% vs. 1 MHz alternatives. | Use Scenario: Supplies regulated 3.3 V to USB-C peripheral (e.g., dongle or hub) drawing up to 2 A from 5 V bus. IC Role / Device Role / Timing Role: Step-down converter with PG output for host-side power-good signaling and EN-controlled hot-plug sequencing. Use Value: Active discharge clears VOUT within 5 ms of disconnect, meeting USB PD fast-removal safety requirements. |
| Digital Still Camera Core Rail | Point-of-Load in Portable Media Player |
Use Scenario: Generates 1.05 V core voltage for CMOS image sensor DSP in compact DSC with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency buck converter with low-noise AGND/PGND separation and feedforward control. Use Value: 3 MHz operation shifts switching harmonics above 100 MHz, easing EMI filtering and passing CISPR-22 Class B radiated emissions. | Use Scenario: Provides 1.8 V to NAND flash memory controller in portable media player with variable 100–2000 mA load. IC Role / Device Role / Timing Role: Adjustable-output buck with load regulation <±0.5%/A and line regulation <±0.1%/V for stable data integrity. Use Value: Tight FB reference (±1%) and integrated MOSFETs eliminate external component drift, ensuring consistent read/write timing across battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 2.25 MHz switching, 300 mV FB reference, no PG output, smaller 1.5 × 1.5 mm DSBGA package. | Lacks power-good signaling and has lower input voltage limit (5.5 V vs. NCP6354BMTAATBG's 5.5 V), limiting use in wide-VIN battery systems. | Select when board space is primary constraint and PG is not required; verify FB divider compatibility with 300 mV reference. |
| RT7295BGJ6F | 2.5 MHz switching, 0.6 V FB reference, integrated PG, but higher quiescent current (15 µA vs. 1 µA shutdown) and no active discharge. | Higher shutdown current increases battery leakage; absence of active discharge delays system reset after disable. | Prefer for cost-sensitive designs where 2.5 MHz suffices and active discharge is unnecessary; validate thermal performance at 2 A load. |
Compared with TPS62231DRYR and RT7295BGJ6F, the NCP6354BMTAATBG uniquely combines 3 MHz operation, active output discharge, and 1 µA shutdown current - making it optimal for ultra-thin portable devices requiring fast, low-leakage power sequencing.
Availability
NCP6354BMTAATBG is available at Aetrix Electronics and suitable for smartphone subsystem power, USB-powered peripherals, digital still camera core rails, and point-of-load regulation in portable media players requiring stable component supply and long-term lifecycle support.
Supply support for NCP6354BMTAATBG 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 focused on energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP6354BMTAATBG belongs to onsemi's high-frequency DC-DC converter product line, designed specifically for space- and efficiency-critical portable electronics powered by single- or multi-cell batteries.
FAQ
What is the maximum output current capability of the NCP6354BMTAATBG?
The NCP6354BMTAATBG delivers up to 2.0 A continuous output current under typical thermal conditions with proper PCB layout. Its cycle-by-cycle current limit is set at 2.8 A (typ), and actual achievable current depends on input voltage, output voltage, ambient temperature, and thermal design - including soldering of the exposed pad and use of ≥4 thermal vias to inner ground planes.
Does the NCP6354BMTAATBG support adjustable output voltage, and how is it configured?
Yes, the NCP6354BMTAATBG supports externally adjustable output voltage from 0.6 V to VIN using a resistor divider connected between VOUT, FB, and AGND. The internal 600 mV ±6 mV reference determines VOUT = 0.6 V × (1 + R1/R2). For example, R1 = 220 kΩ and R2 = 110 kΩ yields 1.8 V output. A feedforward capacitor (Cfb, typically 15 pF) between VOUT and FB improves transient response.
What is the purpose of the separate AGND and PGND pins on the NCP6354BMTAATBG?
The NCP6354BMTAATBG separates AGND (analog ground) and PGND (power ground) to isolate noise-sensitive analog circuitry - including the error amplifier and FB comparator - from high-di/dt switching currents. AGND must connect to the system ground at a single point near the IC, while PGND carries high-current return paths for SW and PVIN. This separation reduces output voltage ripple and improves regulation accuracy.
How does the power good (PG) output function on the NCP6354BMTAATBG?
The PG pin on the NCP6354BMTAATBG is an open-drain output that signals regulation status. It remains low until VOUT reaches 90% of its target (based on FB voltage), then transitions high after a 1.15 ms delay. During operation, PG goes low if VOUT drops below 90% of target, with 3% hysteresis to prevent chatter. A pull-up resistor (typically 1 MΩ) to AVIN or VOUT is required for proper logic-level signaling.
Is the NCP6354BMTAATBG RoHS-compliant and Pb-free?
Yes, the NCP6354BMTAATBG is a Pb-free device compliant with RoHS Directive 2011/65/EU. The "G" suffix in the part number and marking "A2M" with microdot indicate Pb-free packaging per onsemi's standard. The WDFN-8 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL 1) for unlimited floor life at ≤30°C/60% RH.
NCP6354BMTAATBG 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)
NCP6354BMTAATBG FAQ
1.How can I place an order for NCP6354BMTAATBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6354BMTAATBG 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 NCP6354BMTAATBG reliable?
The price and inventory of NCP6354BMTAATBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6354BMTAATBG is usually 5 days.
3.What payment methods are accepted for NCP6354BMTAATBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6354BMTAATBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6354BMTAATBG?
NCP6354BMTAATBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6354BMTAATBG 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 NCP6354BMTAATBG?
For technical support, including NCP6354BMTAATBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6354BMTAATBG requirements.
6.How does Aetrix verify that NCP6354BMTAATBG is sourced from the original manufacturer or authorized distributors?
All NCP6354BMTAATBG 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 NCP6354BMTAATBG meets industry standards.
7.What is the process for return or replacement of NCP6354BMTAATBG?
All NCP6354BMTAATBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP6354BMTAATBG, 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 NCP6354BMTAATBG part is unused and in its original packaging.
Return procedure for NCP6354BMTAATBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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