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onsemi NCP629FC18T2G
- Part No.:
- NCP629FC18T2G
- Manufacturer:
- onsemi
- Package:
- 5-UFBGA, FCBGA
- Datasheet:
-
NCP629FC18T2G.pdf
- Description:
- IC REG LIN 1.8V 150MA 5FLIPCHIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
NCP629FC18T2G from onsemi is a fixed 1.8 V, 150 mA CMOS low-dropout (LDO) regulator in a 5-pin flip-chip CSP package (Case 499AY), featuring 150 mV dropout at full load, 15 µs enable turn-on time, and ±2% output voltage tolerance over -40°C to +125°C - designed for powering noise-sensitive RF and VCO stages in portable battery-powered devices.
For engineers reviewing the NCP629FC18T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low dropout under 150 mV at 150 mA, sub-1 V enable threshold compatibility, 50 µVRMS output noise without bypass capacitor, and enhanced HBM ESD rating of 3.5 kV - all validated for use with low-cost ceramic capacitors in space-constrained layouts.
Technical Context
The NCP629FC18T2G integrates a precision bandgap reference, error amplifier, and PMOS pass transistor in a flip-chip CSP structure optimized for minimal parasitic inductance and thermal resistance (RJA = 277°C/W). Its enable input supports logic-level control with 0.4 V low-threshold and 0.9 V high-threshold, enabling direct interface with 1.8 V I/O domains without level shifting.
Internal protection includes thermal shutdown at 175°C with 10°C hysteresis and current limiting up to 800 mA. The regulator maintains stability with 1.0 µF ceramic output capacitors across its full operating range (1.5 V to 6 V input, -40°C to +125°C ambient), eliminating minimum ESR requirements and simplifying layout for high-frequency noise-sensitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% over -40°C to +125°C - ensures stable core voltage for 1.8 V logic and RF ICs without external feedback. |
| Max Output Current | 150 mA continuous - sufficient for baseband processors, audio codecs, or sensor interfaces in compact portable systems. |
| Dropout Voltage | 150 mV at 150 mA - enables operation from single-cell Li-ion (3.0 V min) or dual-cell alkaline (3.2 V min) with margin. |
| Enable Threshold | 0.4 V (logic low), 0.9 V (logic high) - compatible with 1.8 V GPIO without pull-up resistors or level translators. |
| Output Noise | 50 µVRMS (10 Hz–100 kHz, no bypass cap) - meets stringent noise budgets for VCOs and RF front-ends. |
| ESD Protection | HBM 3.5 kV, MM 400 V - exceeds JEDEC standards for handheld device reliability in manufacturing and field use. |
| Thermal Shutdown | 175°C activation with 10°C hysteresis - prevents latch-up during transient overload or poor PCB thermal design. |
Pinout & Package
Package: 5-pin flip-chip CSP (Case 499AY), dimensions 1.028 mm × 1.190 mm, max height 0.6 mm - enables ultra-compact placement beneath BGA packages or in camera module edge zones.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C3 | Vin | Positive power supply input (1.5 V to 6.0 V); requires local 1.0 µF ceramic decoupling per layout guidelines. |
| A1 | GND | Power ground and substrate connection; must be tied to solid PCB ground plane for thermal and noise performance. |
| A3 | ENABLE | Active-high enable input; pulls regulator into <1 µA standby when <0.4 V; connect to Vin if unused. |
| B2 | NC | No internal connection; leave unconnected - not a test pad or thermal slug. |
| C1 | Vout | Regulated 1.8 V output; supports 1.0–10 µF ceramic capacitors with zero minimum ESR requirement. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 150 mV at 150 mA enables >95% efficiency from 1.95 V input - critical for extending battery runtime in wearables. |
| Fast enable response | 15 µs turn-on time allows dynamic power gating of peripherals without system-level timing penalties. |
| Ceramic-capacitor only | No minimum ESR requirement eliminates need for tantalum or polymer caps - reduces BOM cost and footprint. |
| Low-noise operation | 50 µVRMS noise without external bypass capacitor simplifies layout for RF sections where capacitor placement is constrained. |
| Enhanced ESD robustness | HBM 3.5 kV rating meets AEC-Q100 stress levels - suitable for consumer electronics assembly lines and end-user handling. |
Applications
| Cellular Phone Power Management | MP3 Player Audio Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor I/O banks and SIM interface in slim smartphone designs with tight board area constraints. IC Role / Device Role / Timing Role: Primary 1.8 V LDO delivering clean, regulated voltage with fast enable/disable for power sequencing. Use Value: 150 mV dropout extends usable battery range down to 1.95 V, while 50 µVRMS noise prevents audible artifacts in headset output. |
Use Scenario: Supplies 1.8 V to DAC and headphone amplifier in portable audio players with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator enabling high-fidelity analog signal chain operation. Use Value: Eliminates need for external noise-reduction capacitor, saving 0.8 mm² PCB area and reducing component count by one. |
| Camcorder Image Sensor Bias | RF Front-End VCO Supply |
|
Use Scenario: Provides stable 1.8 V bias to CMOS image sensor analog blocks in compact camcorders where thermal dissipation is limited. IC Role / Device Role / Timing Role: Precision voltage source with ±2% tolerance and excellent load regulation (<2 mV change from 1–150 mA). Use Value: Maintains consistent sensor gain and dark current across temperature (-40°C to +125°C), improving image quality consistency. |
Use Scenario: Supplies 1.8 V to voltage-controlled oscillator (VCO) in Bluetooth/Wi-Fi transceivers where phase noise is critical. IC Role / Device Role / Timing Role: Ultra-low-noise LDO acting as clean power rail for frequency synthesis circuitry. Use Value: 50 µVRMS noise directly translates to lower integrated phase jitter - measurable improvement in EVM and adjacent channel rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 150 mA, 1.8 V, SOT-23-5; dropout 600 mV @ 150 mA; PSRR 60 dB @ 1 kHz | Larger SOT-23 footprint (2.9 × 2.8 mm vs. 1.03 × 1.19 mm); higher dropout limits usable input range | Choose for legacy SMT lines requiring leaded packages; avoid when board area or low-input-voltage operation is critical. |
| Torex XC6206P182MR-G | 150 mA, 1.8 V, SOT-25; dropout 350 mV @ 150 mA; 40 µVRMS noise; no enable pin | Requires external enable circuitry; larger package; lower noise but no logic control | Choose only if enable functionality is unnecessary and 40 µVRMS noise is prioritized over footprint and control flexibility. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP629FC18T2G delivers superior space efficiency (75% smaller footprint), lowest dropout (150 mV vs. ≥350 mV), and integrated enable - making it optimal for next-gen portable RF and imaging systems where size, battery life, and dynamic power control are co-constrained.
Availability
NCP629FC18T2G is available at Aetrix Electronics and suitable for cellular phone power management, MP3 player audio core supply, camcorder image sensor bias, and RF front-end VCO supply requiring stable component supply across high-volume production cycles.
Supply support for NCP629FC18T2G 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, with leadership in power management, analog, and sensor technologies.
The NCP629FC18T2G belongs to onsemi's high-performance LDO family targeting portable battery-powered applications - engineered for ultra-low dropout, fast enable response, and enhanced ESD robustness in chip-scale packaging.
FAQ
What is the maximum input voltage for the NCP629FC18T2G?
The NCP629FC18T2G supports an operating input voltage range of 1.5 V to 6.0 V. Absolute maximum rating is 6.5 V, but sustained operation above 6.0 V is not recommended per the datasheet's Recommended Operating Conditions. Input voltage must exceed (Vout + VDO) = 1.95 V minimum to maintain regulation at full load.
Does the NCP629FC18T2G require an external bypass capacitor for low-noise operation?
No, the NCP629FC18T2G achieves 50 µVRMS output noise (10 Hz–100 kHz) without any external noise-reduction capacitor. This is explicitly confirmed in the datasheet's Noise Decoupling section and Typical Characteristics (Figure 22), distinguishing it from conventional low-noise LDOs that mandate large bypass caps.
What is the thermal resistance (RJA) of the NCP629FC18T2G in standard layout?
The NCP629FC18T2G has a junction-to-ambient thermal resistance (RJA) of 277°C/W when mounted on a 645 mm² copper area with 1 oz thickness on FR4 PCB. This value assumes optimal thermal pad connection to the PCB ground plane - actual RJA improves with larger copper areas or thermal vias, as shown in Figure 26 of the datasheet.
Can the NCP629FC18T2G be used with ceramic output capacitors less than 1.0 µF?
No - the datasheet specifies a minimum output capacitance of 1.0 µF for stability across all operating conditions. Figure 23 confirms instability occurs below this value, especially at higher ESR. Using <1.0 µF risks oscillation and degraded load transient response, violating the device's validated operating envelope.
Is the B2 pin on the NCP629FC18T2G electrically connected internally?
No, the B2 pin is designated NC (No Connection) in the Pin Function Description table and must remain unconnected. It is not bonded to any internal circuitry, substrate, or thermal slug - routing traces or soldering to B2 may compromise reliability or cause unintended coupling.
NCP629FC18T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-UFBGA, FCBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.175V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 175 µA
- Current - Supply (Max):
- -
- PSRR:
- 62dB ~ 38dB (120Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-FlipChip (1.028x1.19)
NCP629FC18T2G FAQ
1.How can I place an order for NCP629FC18T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP629FC18T2G 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 NCP629FC18T2G reliable?
The price and inventory of NCP629FC18T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP629FC18T2G is usually 5 days.
3.What payment methods are accepted for NCP629FC18T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP629FC18T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP629FC18T2G?
NCP629FC18T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP629FC18T2G 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 NCP629FC18T2G?
For technical support, including NCP629FC18T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP629FC18T2G requirements.
6.How does Aetrix verify that NCP629FC18T2G is sourced from the original manufacturer or authorized distributors?
All NCP629FC18T2G 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 NCP629FC18T2G meets industry standards.
7.What is the process for return or replacement of NCP629FC18T2G?
All NCP629FC18T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP629FC18T2G, 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 NCP629FC18T2G part is unused and in its original packaging.
Return procedure for NCP629FC18T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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