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onsemi NCP5252MNTXG
- Part No.:
- NCP5252MNTXG
- Manufacturer:
- onsemi
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
NCP5252MNTXG.pdf
- Description:
- IC REG BUCK ADJ 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:35,146
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Product details
Overview
NCP5252MNTXG from onsemi is a synchronous buck regulator IC with integrated high-side and low-side NMOS power MOSFETs, designed for DC-DC conversion from 5 V or 12 V input rails to adjustable output voltages down to 0.6 V ±1% at up to 2.0 A load. It operates at 333 kHz–1.0 MHz switching frequency, supports skip-mode for light-load efficiency, and includes UVLO, OVP, UVP, cycle-by-cycle OCP, thermal shutdown, and power-good indication. It is used in desktop system power, XDSL modems, and set-top box DC-DC modules.
For engineers reviewing the NCP5252MNTXG datasheet, pinout, applications, or equivalent options, key selection considerations include its integrated 150 mΩ high-side and 100 mΩ low-side FETs, 0.6 V reference accuracy, QFN-16 (3×3 mm) package with exposed thermal pad, and configurable forced-PWM/skip-mode operation via EN/SKIP voltage thresholds.
Technical Context
The NCP5252MNTXG implements a voltage-mode PWM control architecture with input voltage feed-forward ramp generation, enabling stable loop compensation across wide input ranges (4.5–13.2 V) and fast line transient response. Its error amplifier features 88 dB DC gain, 20 MHz unity-gain bandwidth, and 5 V/μs slew rate, supporting robust regulation under dynamic loads.
Transient Response Enhancement (TRE) circuitry monitors COMP voltage to detect large load steps and injects extra high-side pulses-effectively boosting effective switching frequency during transients-while internal digital soft-start (800 μs) and integrated output discharge ensure controlled power-up and safe shutdown. Protection logic includes independent overvoltage (115% trip), undervoltage (80% trip), and thermal shutdown (150 °C) with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0 A continuous - supports mid-power system rails without external FETs |
| Input Voltage Range | 4.5 V to 13.2 V - compatible with 5 V and 12 V intermediate bus architectures |
| Output Voltage Range | 0.6 V to 5.0 V - adjustable via FB resistor divider; 0.6 V reference accurate to ±1% |
| Switching Frequency | 333 kHz / 500 kHz / 1.0 MHz - selectable via FREQ_SET pin voltage (AGND/NC/5 V) |
| High-Side RDS(on) | 225 mΩ max at 25 °C - limits conduction loss and thermal rise at full load |
| Low-Side RDS(on) | 150 mΩ max at 25 °C - enables synchronous rectification with minimal dropout |
| Quiescent Current | 2.5 mA typical in FPWM mode - balances light-load efficiency against control-loop responsiveness |
| Thermal Shutdown | 150 °C junction temperature - protects die integrity during overload or poor heatsinking |
Pinout & Package
Package: QFN-16 (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed EPAD connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 1, 16) | Internal LDO input and high-side gate driver supply | Dual connection provides low-impedance path for analog and power domains; requires local 1 μF ceramic decoupling |
| BST (Pin 2) | Bootstrap capacitor connection for high-side gate drive | Must be tied to LX via 0.1 μF ceramic capacitor; enables NMOS high-side switch operation without external charge pump |
| PGOOD (Pin 3) | Open-drain power-good flag | Asserts high-impedance when VOUT is within ±10% window; requires external pull-up for system sequencing |
| EN/SKIP (Pin 4) | Enable and mode-select input | Logic thresholds define disable (≤1.3 V), FPWM (1.7–2.65 V), and skip mode (>2.65 V); no external pull required |
| COMP (Pin 5) | Error amplifier output | Connects to RC compensation network; sets loop stability and transient response characteristics |
| FB (Pin 6) | Feedback input referenced to 0.6 V internal reference | Resistor divider from VOUT to AGND sets output voltage; bias current <0.1 μA minimizes divider error |
| VO (Pin 7) | Output voltage monitor | Direct connection to VOUT for UVP/OVP comparators; not used for regulation but critical for protection |
| AGND (Pin 8) | Analog ground reference | Separate from PGND to isolate noise-sensitive feedback and error amplifier paths |
| FREQ_SET (Pin 9) | Frequency selection input | GND = 333 kHz, NC = 500 kHz, 5 V = 1.0 MHz - enables EMI optimization without component changes |
| V5 (Pin 10) | 5 V LDO output for internal analog circuitry | Supplies internal bias rails; requires 1 μF ceramic capacitor; delivers up to 20 mA |
| PGND (Pins 11–13) | Power ground return for low-side FET and LX node | High-current path; must be routed with low inductance and tied to EPAD for thermal performance |
| LX (Pins 14–15) | Switch node between high-side and low-side FETs | Connects to external inductor; high di/dt node requiring tight layout and minimized loop area |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side NMOS FETs | Eliminates need for external power switches and gate drivers, reducing BOM count and PCB footprint |
| Adjustable 333 kHz–1.0 MHz switching frequency | Enables EMI tuning and inductor size optimization across diverse input/output combinations |
| Transient Response Enhancement (TRE) | Reduces output voltage deviation during fast load steps by dynamically injecting high-side pulses |
| Lossless low-side current sensing | Enables accurate cycle-by-cycle overcurrent protection without sense-resistor power loss or board space |
| Internal digital soft-start and output discharge | Prevents inrush current and ensures controlled power-down without external timing components |
| Input voltage feed-forward control | Maintains consistent loop gain across 4.5–13.2 V input range, simplifying compensation design |
Applications
| Desktop System Power | XDSL / Cable Modem Power |
|---|---|
|
Use Scenario: Regulating 12 V or 5 V intermediate bus to 3.3 V or 1.2 V for CPU I/O, memory, or PHY interfaces in compact desktop motherboards. IC Role / Device Role / Timing Role: Primary synchronous buck controller delivering up to 2 A with tight output voltage regulation and fast transient response. Use Value: Integrated FETs and 0.6 V reference enable ±1% output accuracy across temperature, supporting modern low-voltage logic rails. |
Use Scenario: Generating stable 3.3 V or 5 V supplies for DSLAM line cards, cable modem SoCs, and Ethernet PHYs in space-constrained telecom equipment. IC Role / Device Role / Timing Role: Efficient DC-DC converter operating in skip mode during standby to meet Energy Star low-power requirements. Use Value: 333 kHz–1.0 MHz frequency selectability allows EMI compliance in noisy broadband environments without redesign. |
| Set-Top Box DC-DC Modules | HD Display Driver Power |
|
Use Scenario: Providing regulated 1.2 V core and 3.3 V I/O rails for ARM-based media processors and video decoders in consumer STBs. IC Role / Device Role / Timing Role: High-efficiency buck regulator with integrated thermal shutdown and power-good signaling for system safety monitoring. Use Value: PGOOD flag and ±10% output window enable reliable processor reset sequencing and brown-out detection. |
Use Scenario: Supplying clean, low-noise 5 V or adjustable bias voltage to LCD panel source drivers and timing controllers in HD displays. IC Role / Device Role / Timing Role: Low-ripple buck regulator with internal soft-start and output discharge to prevent display artifacts during power transitions. Use Value: Integrated V5 LDO powers internal analog blocks, eliminating need for external 5 V rail and reducing system component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z | Higher 3 A rating, fixed 500 kHz frequency, no FREQ_SET pin; lacks TRE and V5 LDO | Better suited for higher-current designs where skip mode is not required and external 5 V bias is available | Select MP2315DJ-LF-Z when >2 A output and simpler frequency control outweigh need for light-load efficiency and integrated analog supply |
| TPS562201DDCR | 2 A rating, 500 kHz fixed frequency, no skip mode; includes Eco-mode™ instead of true skip; smaller 2×2 mm WSON | Optimized for ultra-compact layouts and cost-sensitive industrial applications rather than telecom-grade transient performance | Choose TPS562201DDCR when board space is critical and TRE-enhanced transient response is not required |
Compared with MP2315DJ-LF-Z and TPS562201DDCR, the NCP5252MNTXG uniquely combines adjustable frequency, TRE, integrated V5 LDO, and precise 0.6 V reference-making it optimal for telecom and desktop applications demanding both efficiency and dynamic performance.
Availability
NCP5252MNTXG is available at Aetrix Electronics and suitable for desktop system power, XDSL/cable modem power, and set-top box DC-DC modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP5252MNTXG 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP5252MNTXG belongs to onsemi's high-efficiency synchronous buck regulator product line, engineered for mid-power DC-DC conversion in space-constrained, thermally demanding applications such as computing peripherals and broadband infrastructure.
FAQ
What is the maximum output current capability of the NCP5252MNTXG?
The NCP5252MNTXG delivers up to 2.0 A continuous output current under typical thermal conditions (TA = 85 °C, 3×3 mm QFN with proper PCB copper pour). Its integrated high-side and low-side MOSFETs-rated at 225 mΩ and 150 mΩ respectively-enable this performance without external switches. Derating is required above 85 °C ambient or with limited airflow; full 2 A operation assumes adequate thermal management via the exposed EPAD connected to PGND.
How does the EN/SKIP pin configure operating modes on the NCP5252MNTXG?
The EN/SKIP pin on the NCP5252MNTXG sets three distinct modes: ≤1.3 V disables the device; 1.7–2.65 V enables forced PWM (FPWM) for constant-frequency operation; >2.65 V activates skip mode (PFM) to improve light-load efficiency. These thresholds are internally trimmed and specified over temperature, eliminating need for external resistors. The pin also serves as the primary enable signal-no pull-up or pull-down is required.
Does the NCP5252MNTXG support adjustable switching frequency, and how is it configured?
Yes, the NCP5252MNTXG supports three discrete switching frequencies: 333 kHz, 500 kHz, and 1.0 MHz. Configuration is performed via the FREQ_SET pin (Pin 9): grounding it selects 333 kHz, leaving it open selects 500 kHz, and pulling it to 5 V selects 1.0 MHz. This pin-driven selection avoids external clock components and enables EMI optimization during layout or firmware tuning without hardware changes.
What protection features are integrated into the NCP5252MNTXG?
The NCP5252MNTXG integrates Under Voltage Lock Out (UVLO), Over Voltage Protection (OVP), Undervoltage Protection (UVP), cycle-by-cycle overcurrent protection (OCP), thermal shutdown (150 °C), and power-good (PGOOD) monitoring. OVP triggers at 115% nominal output for >1.5 s; UVP trips at 80% for >4 switching cycles; OCP uses lossless sensing on the low-side FET. All protections include automatic recovery after fault clearance and soft-start reinitiation.
Can the NCP5252MNTXG operate from a 5 V input supply, and what is its minimum input voltage?
Yes, the NCP5252MNTXG operates from an input supply as low as 4.5 V, making it fully compatible with standard 5 V rails. Its VCC UVLO rises at 4.3 V (typical) with 400 mV hysteresis, ensuring reliable startup and shutdown behavior. At 5 V input, it efficiently delivers outputs such as 3.3 V or 1.2 V-verified in typical application circuits with ceramic or SP capacitors and 5 μH inductors per onsemi's design tables.
NCP5252MNTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 13.2V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A
- Frequency - Switching:
- 333kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
NCP5252MNTXG FAQ
1.How can I place an order for NCP5252MNTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP5252MNTXG 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 NCP5252MNTXG reliable?
The price and inventory of NCP5252MNTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5252MNTXG is usually 5 days.
3.What payment methods are accepted for NCP5252MNTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5252MNTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP5252MNTXG?
NCP5252MNTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP5252MNTXG 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 NCP5252MNTXG?
For technical support, including NCP5252MNTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5252MNTXG requirements.
6.How does Aetrix verify that NCP5252MNTXG is sourced from the original manufacturer or authorized distributors?
All NCP5252MNTXG 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 NCP5252MNTXG meets industry standards.
7.What is the process for return or replacement of NCP5252MNTXG?
All NCP5252MNTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP5252MNTXG, 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 NCP5252MNTXG part is unused and in its original packaging.
Return procedure for NCP5252MNTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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