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onsemi NCP720BMT145TBG
- Part No.:
- NCP720BMT145TBG
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
NCP720BMT145TBG.pdf
- Description:
- IC REG LINEAR 1.45V 350MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:57,000
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Product details
Overview
NCP720BMT145TBG from onsemi is a 350 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate VBIAS supply, delivering 1.45 V fixed output at ±2% accuracy over −40°C to +125°C. It achieves 110 mV typical dropout at full load, supports 0.8–5.5 V input and 2.4–5.5 V bias rails, and operates stably with 2.2 µF ceramic output capacitance - ideal for noise-sensitive, space-constrained portable applications like smartphone core logic rails.
For engineers reviewing the NCP720BMT145TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), ultra-low bias current (80 µA typ), monotonic soft-start, and WDFN6 2 mm × 2 mm thermal-pad package - all critical for battery-powered SoC power sequencing and post-regulation.
Technical Context
The NCP720BMT145TBG implements a dual-input NMOS-based LDO architecture where VIN supplies the pass element and VBIAS powers internal control circuitry including reference, error amplifier, and enable logic. This separation enables independent optimization: VIN can be as low as VOUT + 0.5 V while VBIAS must exceed VOUT + 1.4 V (min 2.4 V), decoupling regulation stability from input rail limitations.
Its built-in soft-start ensures monotonic VOUT rise to limit inrush current, and the enable pin features hysteresis with 1.1 V turn-on and 0.4 V turn-off thresholds. Thermal shutdown activates at +160°C and resets at +140°C, and under-voltage lockout on VBIAS triggers below 1.6 V with 0.2 V hysteresis - ensuring robust operation across battery discharge profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.45 V ±2% over −40°C to +125°C - ensures stable core voltage for low-power processors without external feedback. |
| VIN Dropout | 110 mV typical at 350 mA - allows operation with minimal headroom, e.g., 1.56 V input sustains 1.45 V output under full load. |
| VBIAS Dropout | 1.15 V min at 350 mA - requires VBIAS ≥ 2.6 V for reliable regulation, enabling use of higher-voltage auxiliary rails. |
| Bias Current | 80 µA typical (0.5 µA in shutdown) - minimizes quiescent drain on bias supply, critical for multi-rail battery systems. |
| PSRR @ 1 kHz | 65 dB (VBIAS), 65 dB (VIN) - suppresses ripple from noisy DC/DC sources feeding VIN or VBIAS, preserving analog/RF subsystem integrity. |
| Startup Time | 140 µs to 95% VOUT - enables fast power-up sequencing in wake-from-sleep scenarios without system-level delays. |
| Thermal Resistance | RJA = 65°C/W (WDFN6, 2s2p board) - supports 350 mA continuous output with <10°C junction rise above ambient under standard layout. |
Pinout & Package
Package: WDFN6 2 mm × 2 mm (Case 511BR) with exposed thermal pad soldered to ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.45 V to load; connects directly to ceramic capacitor (2.2 µF min) without series impedance. |
| 2 - N/C | No internal connection | Must remain unconnected; no routing or copper pour required - avoids unintended parasitic coupling. |
| 3 - EN | Enable control input | Active-high logic: ≥1.1 V enables regulator; ≤0.4 V disables with 0.5 µA shutdown current - supports host-processor power gating. |
| 4 - BIAS | Bias supply input | Powers internal reference and control circuits; monitored by UVLO (1.6 V threshold); requires ≥2.4 V and local 0.1 µF decoupling. |
| 5 - GND | Ground reference | Common return for IN, OUT, EN, BIAS; thermal pad must be soldered to PCB ground plane for RJA compliance. |
| 6 - IN | Main input supply | Feeds NMOS pass transistor; accepts 0.8–5.5 V; requires ≥1.95 V (1.45 V + 0.5 V) minimum for regulation at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail NMOS architecture | Decouples pass transistor drive (VIN) from control circuitry (VBIAS), enabling ultra-low VIN operation while maintaining PSRR and stability. |
| Monotonic soft-start | Controls VOUT ramp rate to limit inrush current during power-up, preventing input rail collapse in shared-battery systems. |
| Stable with 2.2 µF ceramic output cap | Eliminates need for large electrolytic or tantalum capacitors - reduces board area and improves reliability in portable designs. |
| Low-noise, high-PSRR regulation | 65 dB PSRR at 1 kHz on both VIN and VBIAS inputs suppresses switching noise from upstream DC/DC converters feeding either rail. |
| Integrated thermal shutdown | Auto-recovers after cooling below +140°C - protects against sustained overload or poor heatsinking without requiring external monitoring. |
Applications
| Smartphone Application Processor Core Rail | Tablet GPU Voltage Scaling Domain |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring precise 1.45 V at up to 350 mA during burst-mode execution. IC Role / Device Role / Timing Role: Primary post-regulator converting switched DC/DC output to clean, low-noise core voltage with fast transient response. Use Value: 110 mV dropout enables use of partially discharged Li-ion batteries (≥3.2 V) while maintaining regulation; 40 µVRMS noise prevents digital logic errors. | Use Scenario: Supplies dynamic voltage scaling (DVS) rail for Mali GPU in tablets, adjusting output only via factory-programmed fixed voltage. IC Role / Device Role / Timing Role: Fixed-output LDO providing stable GPU I/O or core voltage independent of main SoC rail fluctuations. Use Value: Dual-rail architecture isolates GPU power domain from SoC VIN noise; 65°C/W RJA supports sustained 350 mA in thermally constrained tablet chassis. |
| Digital Camera Image Signal Processor (ISP) Supply | Set-Top Box (STB) Memory Interface Regulator |
Use Scenario: Delivers low-noise 1.45 V to high-speed ISP in compact camera modules where EMI sensitivity limits switching regulator use. IC Role / Device Role / Timing Role: Low-PSRR-sensitive analog/digital mixed-signal supply with monotonic startup to prevent image corruption during boot. Use Value: 65 dB PSRR at 1 kHz rejects noise from nearby RF transceivers; soft-start prevents frame sync glitches during power-on reset. | Use Scenario: Regulates DDR3/DDR4 memory termination voltage (VTT) or interface I/O rail in STB mainboards with tight layout constraints. IC Role / Device Role / Timing Role: Compact-area LDO replacing larger SOT-23 solutions to meet 2 mm × 2 mm footprint requirements near memory slots. Use Value: WDFN6 package reduces PCB area by >60% vs. SOT-23; 2.2 µF ceramic compatibility eliminates height penalty of tantalum caps near BGA packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B145MR-G | Single-rail (VIN-only) 1.45 V LDO; 120 mV dropout at 300 mA; no VBIAS input; 30 µA IQ. | Lacks dual-rail flexibility; unsuitable when VBIAS rail is available for improved PSRR or lower VIN operation. | Select when board has only one input rail and lowest quiescent current is prioritized over dropout or noise performance. |
| Richtek RT9080L-145GJ6 | Single-rail 1.45 V LDO; 150 mV dropout at 300 mA; 60 µA IQ; no thermal shutdown hysteresis. | Higher dropout limits usable input range; missing thermal reset hysteresis increases risk of thermal cycling in enclosed enclosures. | Select for cost-sensitive consumer applications where thermal margin is ample and VBIAS is unavailable. |
Compared with XC6210B145MR-G and RT9080L-145GJ6, the NCP720BMT145TBG uniquely supports dual-rail operation for enhanced PSRR and lower VIN headroom, includes monotonic soft-start and thermal hysteresis, and delivers superior noise performance - making it optimal for high-reliability portable SoC power domains.
Availability
NCP720BMT145TBG is available at Aetrix Electronics and suitable for smartphone processor core rails, tablet GPU voltage domains, digital camera ISP supplies, and set-top box memory interface regulators requiring stable component supply across production lifecycles.
Supply support for NCP720BMT145TBG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP720BMT145TBG belongs to onsemi's VLDO linear regulator product line, engineered specifically for space-constrained, noise-sensitive portable electronics requiring dual-rail flexibility, ultra-low dropout, and guaranteed monotonic startup behavior.
FAQ
What is the exact output voltage tolerance and temperature range for the NCP720BMT145TBG?
The NCP720BMT145TBG provides a factory-programmed fixed output voltage of 1.45 V with ±2% accuracy across the full operating junction temperature range of −40°C to +125°C. This specification is verified under defined test conditions: VBIAS ≥ (VOUT + 1.4 V) or 2.5 V (whichever is greater), VIN ≥ VOUT + 0.5 V, and load current from 0 to 350 mA. The NCP720BMT145TBG does not support adjustable output - its voltage is laser-trimmed during manufacturing.
Can the NCP720BMT145TBG operate with VIN below 1.45 V?
No, the NCP720BMT145TBG requires VIN ≥ VOUT + 0.5 V (i.e., ≥1.95 V) to maintain regulation at full 350 mA load, per the Electrical Characteristics table. While the absolute maximum VIN rating is 6 V and minimum specified VIN is 0.8 V, regulation fails below the dropout threshold - the 110 mV typical dropout applies only when VIN is sufficiently above VOUT. Attempting operation with VIN < 1.95 V will cause output collapse, especially under load. The NCP720BMT145TBG is not designed for sub-VOUT input operation.
What is the purpose of the BIAS pin on the NCP720BMT145TBG, and what voltage must it receive?
On the NCP720BMT145TBG, the BIAS pin supplies power to internal control circuitry (reference, error amplifier, enable logic), decoupling it from the main VIN rail. It must be supplied with 2.4 V to 5.5 V - specifically ≥ (VOUT + 1.4 V) or 2.5 V, whichever is greater - so for the NCP720BMT145TBG (1.45 V output), minimum VBIAS is 2.6 V. The BIAS pin is monitored by an under-voltage lockout circuit that disables regulation if VBIAS falls below 1.6 V.
Does the NCP720BMT145TBG require external components for stability, and what capacitor values are validated?
Yes, the NCP720BMT145TBG requires an external ceramic output capacitor for stability, with a validated effective capacitance range of 2.2 µF to 10 µF. A 2.2 µF X5R/X7R ceramic capacitor placed directly at the OUT pin (no vias) is sufficient for stable operation. Input (CIN ≥ 1 µF) and bias (CBIAS ≥ 0.1 µF) ceramic decoupling capacitors are also recommended to suppress PCB inductance effects. The NCP720BMT145TBG is not stable with electrolytic or tantalum capacitors alone.
How does the enable (EN) functionality work on the NCP720BMT145TBG, and what happens in shutdown mode?
The EN pin on the NCP720BMT145TBG is active-high with hysteresis: regulation enables when VEN rises above 1.1 V and disables when VEN falls below 0.4 V. In shutdown mode, the NCP720BMT145TBG draws only 0.5 µA typical bias current (ISHDN), effectively disconnecting the output from VIN while maintaining VBIAS monitoring. The EN pin must not float - if unused, it should be tied to VIN or VBIAS. No external pull-up/down is required due to internal design.
NCP720BMT145TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.45V
- 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)
NCP720BMT145TBG FAQ
1.How can I place an order for NCP720BMT145TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP720BMT145TBG 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 NCP720BMT145TBG reliable?
The price and inventory of NCP720BMT145TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP720BMT145TBG is usually 5 days.
3.What payment methods are accepted for NCP720BMT145TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP720BMT145TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP720BMT145TBG?
NCP720BMT145TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP720BMT145TBG 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 NCP720BMT145TBG?
For technical support, including NCP720BMT145TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP720BMT145TBG requirements.
6.How does Aetrix verify that NCP720BMT145TBG is sourced from the original manufacturer or authorized distributors?
All NCP720BMT145TBG 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 NCP720BMT145TBG meets industry standards.
7.What is the process for return or replacement of NCP720BMT145TBG?
All NCP720BMT145TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP720BMT145TBG, 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 NCP720BMT145TBG part is unused and in its original packaging.
Return procedure for NCP720BMT145TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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