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onsemi NCP720BMT180TBG
- Part No.:
- NCP720BMT180TBG
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
NCP720BMT180TBG.pdf
- Description:
- IC REG LINEAR 1.8V 350MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,723
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Product details
Overview
NCP720BMT180TBG from onsemi is a 350 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate VBIAS supply, delivering 1.80 V fixed output at ±2% accuracy over −40°C to +125°C, ultra-low 110 mV typical dropout at full load, and stable operation with 2.2 µF ceramic output capacitor - designed for noise-sensitive, space-constrained portable electronics.
For engineers reviewing the NCP720BMT180TBG datasheet, pinout, applications, or equivalent options, key selection considerations include dual-rail bias architecture (VIN/VBIAS), monotonic soft-start, PSRR up to 70 dB at 1 kHz on VBIAS, and WDFN6 thermal pad grounding requirements.
Technical Context
The NCP720BMT180TBG implements a dual-input NMOS-based VLDO architecture where VIN supplies the pass element and VBIAS powers internal control circuitry - enabling independent optimization of input headroom and bias stability. Its built-in UVLO (1.6 V threshold, 0.2 V hysteresis) monitors VBIAS, while thermal shutdown activates at +160°C and resets at +140°C.
Regulation relies on a precision voltage reference and error amplifier driving the NMOS gate; soft-start ensures monotonic VOUT rise to limit inrush current. Stability is guaranteed with 2.2 µF–10 µF ceramic output capacitors without requiring ESR tuning, unlike PMOS LDOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.80 V ±2% over −40°C to +125°C - ensures stable core I/O rail for processors and sensors. |
| VIN Dropout Voltage | 110 mV typical at 350 mA - enables regulation down to VIN = 1.91 V, critical for battery-powered systems near end-of-discharge. |
| VBIAS Range | 2.4 V to 5.5 V - allows use of higher-voltage auxiliary rails (e.g., 3.3 V or 5 V) to power control logic independently of VIN. |
| PSRR (VBIAS) | 70 dB at 1 kHz - suppresses noise from shared bias rails, preserving signal integrity in mixed-signal SoC subsystems. |
| Shutdown Current | 0.5 µA typical - minimizes quiescent drain during system sleep modes in portable devices. |
| Thermal Resistance | RJA = 65°C/W (WDFN6, 2 mm × 2 mm) - requires thermal pad soldered to PCB ground plane for reliable 350 mA operation at +125°C junction. |
Pinout & Package
Package: WDFN6 (Case 511BR), 2 mm × 2 mm, 0.65 mm pitch, exposed thermal pad (must be soldered to ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output node | Delivers stable 1.80 V to load; connects directly to 2.2 µF ceramic capacitor with minimal trace inductance. |
| 2 - N/C | No internal connection | Must remain unconnected; no routing or copper fill required. |
| 3 - EN | Enable control input | Active-high (VEN ≥ 1.1 V); drives regulator into shutdown (0.5 µA ISHDN) when ≤ 0.4 V. |
| 4 - BIAS | Bias supply for internal circuitry | Powers reference, error amp, and UVLO; monitored for under-voltage lockout at 1.6 V rising threshold. |
| 5 - GND | Power and signal reference | Common return for IN, OUT, EN, BIAS; must connect to thermal pad and system ground plane. |
| 6 - IN | Main input supply | Feeds NMOS pass transistor; supports 0.8 V–5.5 V range but requires VIN ≥ VOUT + 0.5 V for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail NMOS architecture | Separates power path (VIN→OUT) from control logic supply (VBIAS), enabling lower dropout than PMOS LDOs and relaxed output capacitor ESR requirements. |
| Monotonic soft-start | Controls VOUT rise time to 140 µs (to 95% of 1.80 V), limiting inrush current into downstream capacitance and preventing system brownouts. |
| High PSRR on VBIAS | 70 dB at 1 kHz suppresses ripple from noisy bias sources (e.g., switching DC/DC outputs), protecting sensitive analog/RF blocks powered by same rail. |
| Stable with small ceramic caps | Guaranteed stability with 2.2 µF–10 µF X5R/X7R ceramics - eliminates need for tantalum or aluminum electrolytics, reducing board area and cost. |
Applications
| Smartphone Application Processor Core Rail | Tablet I/O Voltage Domain |
|---|---|
Use Scenario: Powering ARM Cortex-A series CPU cores requiring tightly regulated 1.8 V at up to 350 mA during burst-mode operation. IC Role / Device Role / Timing Role: Primary post-regulator converting switched DC/DC output to low-noise, low-dropout core voltage. Use Value: 110 mV dropout preserves regulation as battery discharges to 1.91 V; 70 dB VBIAS PSRR isolates core from noisy system PMIC bias rails. | Use Scenario: Supplying 1.8 V to LPDDR2/LPDDR3 memory I/O interfaces in tablets with dynamic voltage scaling. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, fast-transient I/O rail synchronized with memory controller timing. Use Value: Monotonic soft-start prevents VIO overshoot during memory initialization; 2.2 µF ceramic compatibility reduces footprint vs. legacy tantalum solutions. |
| Digital Camera Image Sensor Bias | STB HDMI Transceiver Power |
Use Scenario: Delivering low-noise 1.8 V to CMOS image sensor digital logic and interface circuitry in compact camera modules. IC Role / Device Role / Timing Role: Noise-suppressing bias regulator decoupling sensor digital domain from noisy main SoC supply. Use Value: 40 µVRMS output noise (10 Hz–100 kHz) prevents clock jitter and quantization artifacts; WDFN6 size fits tight optical module layouts. | Use Scenario: Powering HDMI transmitter PHY circuits in set-top boxes where EMI and power rail noise affect signal integrity. IC Role / Device Role / Timing Role: Dedicated low-ESR, high-PSRR LDO for HDMI 1.4/2.0 PHY analog and digital domains. Use Value: 65°C/W thermal resistance enables continuous 350 mA operation on standard 4-layer PCBs; 52 dB VIN PSRR at 10 Hz attenuates low-frequency switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, dual-rail LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B182MR-G | Single-rail (VIN-only) 1.8 V LDO; 150 mV dropout at 300 mA; no VBIAS input; 30 µVRMS noise. | Lacks VBIAS isolation - unsuitable where bias rail noise must be rejected independently of VIN. | Select when board has only one clean input rail and lowest possible noise is prioritized over dropout or bias flexibility. |
| Richtek RT9080ALGQW | Dual-rail 1.8 V LDO; 120 mV dropout at 350 mA; 60 dB PSRR at 1 kHz on VBIAS; requires 4.7 µF min COUT. | Higher minimum output capacitance increases solution size; slightly lower PSRR than NCP720BMT180TBG. | Select when existing design uses 4.7 µF ceramics and needs pin-compatible dual-rail topology with similar thermal performance. |
Compared with XC6210B182MR-G and RT9080ALGQW, the NCP720BMT180TBG offers superior VBIAS PSRR (70 dB vs. ≤60 dB), lowest dropout (110 mV), and smallest recommended COUT (2.2 µF), making it optimal for ultra-compact, multi-rail noise-critical designs.
Availability
NCP720BMT180TBG is available at Aetrix Electronics and suitable for smartphone processor core rails, tablet memory I/O domains, digital camera sensor biasing, and STB HDMI transceiver power requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for NCP720BMT180TBG 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 electronics, serving automotive, industrial, cloud, and consumer markets with power, analog, sensing, and connectivity solutions.
The NCP720BMT180TBG belongs to onsemi's VLDO linear regulator product line, engineered specifically for battery-powered portable devices demanding ultra-low dropout, dual-rail noise isolation, and minimal PCB footprint.
FAQ
What is the maximum input voltage the NCP720BMT180TBG can tolerate?
The NCP720BMT180TBG supports an absolute maximum input voltage (VIN) of 6 V per its Absolute Maximum Ratings table. Operation above 5.5 V is not recommended - the specified operating input range is 0.8 V to 5.5 V. Exceeding 6 V risks permanent damage, regardless of duration or current level.
Does the NCP720BMT180TBG require an external resistor divider to set output voltage?
No, the NCP720BMT180TBG is a fixed-output voltage regulator with factory-programmed 1.80 V nominal output. It does not support adjustable output via external feedback resistors. The "BMT" suffix and "180" in the part number explicitly denote the 1.80 V variant; no external components are needed to configure VOUT.
Can the NCP720BMT180TBG operate with VBIAS lower than VIN?
Yes - the NCP720BMT180TBG is designed for independent VBIAS and VIN supplies. VBIAS must be ≥2.4 V and ≥(VOUT + 1.4 V) = 3.2 V (whichever is greater), while VIN must be ≥VOUT + 0.5 V = 2.3 V. Therefore, valid configurations include VBIAS = 3.3 V with VIN = 2.5 V, or VBIAS = 5.0 V with VIN = 1.95 V - enabling flexible power architecture partitioning.
What is the purpose of the thermal pad on the NCP720BMT180TBG package?
The exposed thermal pad on the WDFN6 package of the NCP720BMT180TBG must be soldered to the PCB ground plane to achieve the specified RJA = 65°C/W. Without this connection, thermal resistance increases significantly, risking thermal shutdown at currents far below 350 mA - especially in ambient temperatures above 60°C or enclosed enclosures.
Is the NCP720BMT180TBG RoHS-compliant and lead-free?
Yes, the NCP720BMT180TBG is a Pb-free device, as confirmed in the datasheet Features section and Ordering Information table. It complies with RoHS Directive 2011/65/EU and is marked with the "G" suffix indicating lead-free packaging. No lead-containing solder or finishes are used in its construction or termination.
NCP720BMT180TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 350mA
- Current - Output:
- 350mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 65dB ~ 25dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WDFN (2x2)
NCP720BMT180TBG FAQ
1.How can I place an order for NCP720BMT180TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP720BMT180TBG 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 NCP720BMT180TBG reliable?
The price and inventory of NCP720BMT180TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP720BMT180TBG is usually 5 days.
3.What payment methods are accepted for NCP720BMT180TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP720BMT180TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP720BMT180TBG?
NCP720BMT180TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP720BMT180TBG 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 NCP720BMT180TBG?
For technical support, including NCP720BMT180TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP720BMT180TBG requirements.
6.How does Aetrix verify that NCP720BMT180TBG is sourced from the original manufacturer or authorized distributors?
All NCP720BMT180TBG 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 NCP720BMT180TBG meets industry standards.
7.What is the process for return or replacement of NCP720BMT180TBG?
All NCP720BMT180TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP720BMT180TBG, 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 NCP720BMT180TBG part is unused and in its original packaging.
Return procedure for NCP720BMT180TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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