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onsemi NCP6324BMTAATBG
- Part No.:
- NCP6324BMTAATBG
- Manufacturer:
- onsemi
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
NCP6324BMTAATBG.pdf
- Description:
- IC REG BUCK ADJ 2A 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:12,946
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Product details
Overview
NCP6324BMTAATBG from onsemi is a synchronous buck converter IC optimized for point-of-load regulation in portable battery-powered systems, delivering up to 2 A output current with external voltage adjustment (0.6 V to VIN), 3 MHz switching frequency, and integrated high- and low-side MOSFETs (RON_H = 160 mΩ typ @ 3.6 V, RON_L = 110 mΩ typ @ 3.6 V). It features Power Good output, soft-start, active output discharge, and operates from 2.5 V to 5.5 V input - ideal for powering application processors or memory subsystems in smartphones and USB-powered devices.
For engineers reviewing the NCP6324BMTAATBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 2 A continuous output capability, WDFN8 2.0 × 2.0 mm wettable-flank–compatible package, automatic PWM/PFM mode transition, thermal shutdown at 150 °C, and power-good timing parameters (TdPGH1 = 1.15 ms, VPGL = 90% of VFB).
Technical Context
The NCP6324BMTAATBG implements voltage-mode control with input-voltage feedforward compensation to maintain stable regulation across its 2.5–5.5 V input range. Its 3 MHz fixed-frequency PWM operation ensures minimal external component size, while discontinuous-conduction PFM mode engages automatically under light load to sustain high efficiency down to 10 mA.
It integrates cycle-by-cycle overcurrent protection (ILIMP = 2.8 A typ), undervoltage lockout (VINUV− = 2.4 V, hysteresis = 100 mV), and active output discharge via an internal 500 Ω switch between SW and PGND. The PG/MODE pin serves as open-drain Power Good output (not mode-select) per the B-suffix variant, with 5 mA sink capability and 90% VFB threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V) and triple-cell alkaline/NiMH (3.6–4.5 V) without external regulators. |
| Output Current | Up to 2 A continuous - sufficient for core logic rails in mobile SoCs and FPGA I/O banks. |
| Switching Frequency | 3.0 MHz ±10% - enables use of sub-1 µH inductors and 10 µF ceramic output capacitors, reducing board area by >40% vs. 1 MHz converters. |
| Feedback Reference | 600 mV ±6 mV - sets output voltage via external resistor divider (VOUT = 0.6 V × (1 + R1/R2)), enabling precise 0.6–5.5 V programmability. |
| Power Good Threshold | 90% of VFB (540 mV) with 5% hysteresis - provides reliable system-level power sequencing and fault detection for host processors. |
| Thermal Shutdown | 150 °C with 25 °C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Quiescent Current | 30 µA in PFM mode - extends battery runtime in always-on sensor or standby subsystems. |
Pinout & Package
The NCP6324BMTAATBG is housed in a space-saving 2.0 mm × 2.0 mm × 0.75 mm WDFN8 package (Case 511BE) with 0.5 mm pitch and exposed thermal pad. This Pb-free, RoHS-compliant package supports automated optical inspection (AOI) via wettable flanks and achieves RJA = 62 °C/W on standard 4-layer boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Main return path for high-current switching loop; must be connected directly to system ground plane with low-inductance routing. |
| 2 - SW | Switch Node | Connection point between internal high-side and low-side MOSFETs; drives external inductor and requires tight layout to minimize EMI. |
| 3 - AGND | Analog Ground | Reference ground for feedback, enable, and bias circuits; isolated from PGND except at single-point connection near exposed pad. |
| 4 - FB | Feedback Input | Senses output voltage via resistor divider; internal 600 mV reference enables precise output programming and line/load regulation. |
| 5 - EN | Enable Input | Active-high digital control (VEN_H = 1.1 V min); includes 5 µs internal filter and 10 nA pull-down for robust power sequencing. |
| 6 - PG | Power Good Output | Open-drain signal indicating regulated output (low = fault, high-Z = OK); requires external pull-up for system monitoring. |
| 7 - AVIN | Analog Supply | Bias supply for internal analog/digital circuitry; bypassed with ≥1 µF ceramic capacitor placed adjacent to pin. |
| 8 - PVIN | Power Input | Main input rail for power MOSFETs; requires ≥10 µF low-ESR ceramic capacitor placed within 2 mm of pin to suppress switching noise. |
| PAD - Exposed Pad | Thermal & Electrical Ground | Internally unconnected but must be soldered to system ground plane to ensure thermal performance (RJB = 30 °C/W) and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated high-side (160 mΩ) and low-side (110 mΩ) MOSFETs eliminate external diode losses, enabling >90% peak efficiency at 1.8 V/1 A. |
| Automatic PWM/PFM mode transition | No external control needed - seamless shift from fixed-frequency PWM (medium/heavy load) to variable-frequency PFM (light load) improves light-load efficiency by 15–25%. |
| Active output discharge | Internal 500 Ω switch discharges output capacitor when disabled, preventing floating voltages and ensuring safe power-down sequencing in multi-rail systems. |
| Power Good monitoring | Dedicated open-drain PG pin with 1.15 ms startup delay and 90% VFB threshold enables reliable system reset assertion and fault logging in real-time applications. |
| Robust protection suite | Includes cycle-by-cycle overcurrent (2.8 A peak), thermal shutdown (150 °C), UVLO (2.4 V), and negative current limit (1 A) - eliminates need for external fault management circuitry. |
Applications
| Smartphone Application Processor Core Rail | USB-Powered IoT Sensor Hub |
|---|---|
|
Use Scenario: Regulating 1.1 V core voltage for ARM Cortex-A series SoCs during burst-mode compute cycles. IC Role / Device Role / Timing Role: Primary point-of-load DC-DC converter with fast transient response (<10 µs recovery) and tight output regulation (±1.5% over line/load/temp). Use Value: Enables dynamic voltage scaling (DVS) support and maintains SoC stability under 0–2 A load steps, reducing system-level power loss by 18% vs. LDO-based solutions. |
Use Scenario: Powering ultra-low-power microcontrollers (e.g., STM32L4), BLE radios, and environmental sensors from 5 V USB input. IC Role / Device Role / Timing Role: Efficient step-down regulator operating in PFM mode at <100 µA load, with automatic wake-up on EN assertion. Use Value: Extends battery life in energy-harvesting nodes by maintaining >85% efficiency at 100 µA output, while PG signal validates rail readiness before sensor sampling. |
| Digital Still Camera Image Sensor Bias | Portable Media Player Audio Codec Supply |
|
Use Scenario: Generating clean 2.8 V bias for CMOS image sensors requiring low-noise, ripple-free supply. IC Role / Device Role / Timing Role: Low-ripple buck converter with 10 mVpp output noise in PWM mode and soft-start-controlled ramp rate (100 µs 10–90%). Use Value: Prevents image artifacts (e.g., banding, fixed-pattern noise) by suppressing switching noise coupling into analog sensor paths via optimized layout and Cfb feedforward. |
Use Scenario: Supplying 3.3 V to stereo audio codecs (e.g., AK4458) in portable music players with simultaneous display backlight operation. IC Role / Device Role / Timing Role: High-efficiency, low-thermal-footprint regulator supporting 2 A peak current during bass transients without thermal throttling. Use Value: Delivers consistent audio fidelity by sustaining >92% efficiency at 1.5 A and limiting junction temperature rise to <35 °C on 2-layer PCBs. |
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 | 2.05 V to 6.5 V input, 3 MHz, 300 mA max output - lower current rating and no Power Good output. | Suitable only for low-power peripherals (e.g., touch controllers), not core rails or high-current sensors. | Select only if output current ≤300 mA and PG functionality is unnecessary; requires redesign of feedback network due to 0.6 V reference mismatch. |
| MP2143GJ-Z | 4.5 V to 17 V input, 2 A, 1.4 MHz - higher input range but lower switching frequency increases inductor/capacitor size by ~2.5×. | Targeted at industrial 12 V bus systems, not battery-powered portables with tight space constraints. | Choose only for wide-input applications where 3 MHz operation is not required; incompatible with NCP6324BMTAATBG's 2.5–5.5 V battery interface. |
Compared with TPS62231DRYR and MP2143GJ-Z, the NCP6324BMTAATBG uniquely combines 2 A output, 3 MHz operation, Power Good signaling, and battery-optimized 2.5–5.5 V input range - making it irreplaceable for compact, high-efficiency point-of-load designs in portable electronics without compromising on protection or sequencing features.
Availability
NCP6324BMTAATBG is available at Aetrix Electronics and suitable for smartphone power management, USB-C peripheral regulation, and portable media player subsystems requiring stable component supply, long-term lifecycle support, and automotive-grade traceability (AEC-Q100 qualified variants available).
Supply support for NCP6324BMTAATBG 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 focused on energy-efficient innovation, delivering silicon solutions for automotive, industrial, cloud, and personal electronics markets with emphasis on reliability and sustainability.
The NCP6324BMTAATBG belongs to onsemi's high-frequency synchronous buck converter product line, engineered specifically for space-constrained, battery-operated portable devices demanding high efficiency across wide load ranges and robust power sequencing capabilities.
FAQ
What is the maximum output current capability of the NCP6324BMTAATBG?
The NCP6324BMTAATBG delivers up to 2 A of continuous output current under recommended operating conditions (TJ ≤ 125 °C, proper PCB thermal design). Peak current limit is 2.8 A typical, with cycle-by-cycle protection preventing damage during transient overloads. Actual achievable current depends on input voltage, output voltage, ambient temperature, and PCB copper area - e.g., at VIN = 3.6 V, VOUT = 1.2 V, and 25 °C ambient, full 2 A is sustainable with ≥4 cm² of 2-oz copper on top layer connected to the exposed pad.
Does the NCP6324BMTAATBG support automatic power-save mode?
Yes, the NCP6324BMTAATBG features automatic PWM/PFM mode transition - it operates in fixed-frequency PWM mode under medium-to-heavy loads (typically >200 mA) and seamlessly shifts to variable-frequency PFM mode under light loads (e.g., <50 mA) to minimize quiescent current (30 µA typical). This behavior is inherent to the B-suffix variant and requires no external MODE pin control, unlike the C-suffix version.
What is the function of the PG pin on the NCP6324BMTAATBG?
The PG pin on the NCP6324BMTAATBG is an open-drain Power Good output that signals valid regulation: it remains high-impedance when output voltage reaches ≥90% of target (e.g., ≥540 mV for 0.6 V reference), and pulls low if output drops below that threshold. Startup delay is 1.15 ms from EN rising edge. No external pull-up is mandatory but strongly recommended for system monitoring - a 100 kΩ resistor to 3.3 V is typical.
Can the NCP6324BMTAATBG be used with ceramic output capacitors only?
Yes, the NCP6324BMTAATBG is fully compatible with all-ceramic output capacitor designs. Its internal compensation is optimized for 1 µH inductors and 10 µF X5R/X7R MLCCs, yielding stable operation with <10 mVpp ripple in PWM mode. For best results, place the capacitor within 3 mm of the FB and PGND pins, and select parts with ≤10 mΩ ESR (e.g., Murata GRM21BR61A106KE19) to avoid instability or excessive ripple.
What package type does the NCP6324BMTAATBG use, and is it RoHS compliant?
The NCP6324BMTAATBG uses the WDFN8 (2.0 mm × 2.0 mm, 0.5 mm pitch) package per Case 511BE, featuring an exposed thermal pad and wettable flanks for automated optical inspection. It is Pb-free, halogen-free/BFR-free, and fully RoHS compliant per EU Directive 2011/65/EU, with MSL Level 1 moisture sensitivity rating - allowing indefinite floor life under dry pack conditions.
NCP6324BMTAATBG 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):
- 2.5V
- 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)
NCP6324BMTAATBG FAQ
1.How can I place an order for NCP6324BMTAATBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP6324BMTAATBG 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 NCP6324BMTAATBG reliable?
The price and inventory of NCP6324BMTAATBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP6324BMTAATBG is usually 5 days.
3.What payment methods are accepted for NCP6324BMTAATBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP6324BMTAATBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP6324BMTAATBG?
NCP6324BMTAATBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP6324BMTAATBG 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 NCP6324BMTAATBG?
For technical support, including NCP6324BMTAATBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP6324BMTAATBG requirements.
6.How does Aetrix verify that NCP6324BMTAATBG is sourced from the original manufacturer or authorized distributors?
All NCP6324BMTAATBG 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 NCP6324BMTAATBG meets industry standards.
7.What is the process for return or replacement of NCP6324BMTAATBG?
All NCP6324BMTAATBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP6324BMTAATBG, 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 NCP6324BMTAATBG part is unused and in its original packaging.
Return procedure for NCP6324BMTAATBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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