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onsemi NCP139AFCT100T2G
- Part No.:
- NCP139AFCT100T2G
- Manufacturer:
- onsemi
- Package:
- 6-XFBGA, WLCSP
- Datasheet:
-
NCP139AFCT100T2G.pdf
- Description:
- IC REG LINEAR 1V 1A 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,957
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Product details
Overview
NCP139AFCT100T2G from onsemi is a 1 A very low dropout (VLDO) linear regulator with NMOS pass transistor and dedicated VBIAS rail, delivering 1.00 V fixed output with ±1% accuracy over temperature and ultra-low 50 mV dropout at full load-designed for noise-sensitive, space-constrained portable power rails in smartphones and tablets.
For engineers reviewing the NCP139AFCT100T2G datasheet, pinout, applications, or equivalent options, key selection criteria include bias-supply independence, active discharge capability, WLCSP6 footprint compatibility, and PSRR performance above 75 dB at 1 kHz.
Technical Context
The NCP139AFCT100T2G employs a dual-rail architecture: VIN supplies the pass element while VBIAS powers internal control circuitry, enabling stable regulation even when VIN approaches VOUT. Its NMOS topology eliminates output capacitor ESR dependency for stability.
It integrates undervoltage lockout on VBIAS (1.6 V threshold with 0.2 V hysteresis), thermal shutdown (160°C trip), and logic-level enable with 0.9 V high-threshold-supporting seamless ON/OFF sequencing in battery-powered systems without external level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.00 V ±1% over −40°C to +85°C - ensures precise core I/O rail compliance for modern SoCs. |
| VIN Dropout Voltage | 50 mV typ. at 1 A - enables operation from 1.05 V input, critical for post-regulation after buck converters. |
| VBIAS Range | 3.0 V to 5.5 V - decouples control logic supply from noisy main rail, improving PSRR and noise immunity. |
| PSRR (VIN) | 75 dB at 1 kHz - suppresses switching noise from upstream DC/DC stages feeding VIN. |
| Output Noise | 48 µVRMS (10 Hz–100 kHz) - meets stringent analog/RF subsystem requirements in mobile devices. |
| Quiescent Bias Current | 35 µA typ. - minimizes standby power loss in always-on system rails. |
| Enable Threshold | VEN(H) = 0.9 V - compatible with 1.0 V GPIOs without pull-up resistors or level shifters. |
Pinout & Package
Package: WLCSP6 (1.2 mm × 0.8 mm, 0.4 mm pitch, Case 567MV), optimized for ultra-compact PCB layouts in mobile applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output voltage | Delivers stable 1.00 V to load; requires direct connection to ceramic output capacitor (10 µF min). |
| VIN | Main input supply | Feeds NMOS pass transistor; must be ≥ VOUT + 50 mV for regulation; accepts up to 5.5 V. |
| SNS | Output voltage sensing | Connected directly to VOUT net on PCB to compensate for trace IR drop in fixed-voltage variants. |
| GND | Power ground reference | Common return for VIN, VOUT, and VBIAS; requires low-impedance copper pour under package. |
| EN | Logic-level enable | Active-high control: ≥0.9 V enables regulator; ≤0.4 V disables with 0.5 µA bias current in shutdown. |
| VBIAS | Bias supply for control circuitry | Powers internal reference and error amplifier; monitored by UVLO; must be ≥3.0 V for operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 50 mV at 1 A enables use with tightly regulated intermediate bus voltages (e.g., 1.05 V input for 1.00 V output). |
| Separate VBIAS rail | Isolates sensitive control circuitry from noisy VIN, achieving 85 dB PSRR from VBIAS and enabling stable operation with shared input sources. |
| Active output discharge | Integrated 150 Ω pull-down (NCP139A variant) ensures rapid VOUT discharge during disable-critical for power sequencing in multi-rail systems. |
| Stable with ceramic capacitors | Guaranteed stability with 10 µF–22 µF X5R/X7R ceramics-eliminates need for bulky tantalum or aluminum electrolytics. |
| Thermal protection | Auto-recovering shutdown at 160°C junction temperature prevents permanent damage during transient overload or poor heatsinking. |
Applications
| Smartphone Core I/O Rail | Tablet Camera Sensor Power |
|---|---|
Use Scenario: Supplying 1.00 V to application processor I/O banks requiring tight voltage tolerance and low noise. IC Role / Device Role / Timing Role: Post-regulator cleaning up ripple from switching DC/DC converter outputs. Use Value: ±1% accuracy and 48 µVRMS noise ensure signal integrity for high-speed interfaces like MIPI D-PHY. | Use Scenario: Powering CMOS image sensor analog front-end circuits sensitive to supply perturbations. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO providing clean bias for pixel readout and ADC reference. Use Value: 75 dB PSRR at 1 kHz suppresses switching artifacts from nearby PMICs, reducing image fixed-pattern noise. |
| DVR Memory Interface Rail | STB HDMI PHY Power |
Use Scenario: Delivering 1.00 V to LPDDR4 I/O buffers in digital video recorders where layout space is constrained. IC Role / Device Role / Timing Role: Compact-area LDO replacing larger solutions to meet mechanical stack-up limits. Use Value: WLCSP6 (1.2 mm × 0.8 mm) footprint saves >60% board area versus SOT-23 alternatives. | Use Scenario: Providing regulated 1.00 V to HDMI transmitter PHY circuitry in set-top boxes with strict EMI limits. IC Role / Device Role / Timing Role: Low-EMI linear regulator minimizing conducted emissions on high-speed serial links. Use Value: Ultra-low 50 mV dropout allows operation from marginally regulated 1.05 V supplies, simplifying upstream power tree design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A1610DRBR | 1 A, 1.0 V fixed, 75 mV dropout, no VBIAS rail, 65 dB PSRR at 1 kHz | Lacks bias-rail isolation; higher dropout limits minimum input voltage to 1.075 V | Choose when board space allows SOT-23-6 and VBIAS separation is unnecessary. |
| MCP1826T-1002E/DB | 1 A, 1.0 V fixed, 120 mV dropout, single-supply, 70 dB PSRR at 1 kHz | No active discharge; higher dropout increases power loss at 1 A | Prefer for cost-sensitive industrial designs where 120 mV dropout is acceptable. |
Compared with TPS7A1610DRBR and MCP1826T-1002E/DB, the NCP139AFCT100T2G uniquely delivers 50 mV dropout with independent VBIAS, enabling lower input voltage operation and superior noise rejection-justifying its use in premium portable electronics where size, efficiency, and signal integrity are co-optimized.
Availability
NCP139AFCT100T2G is available at Aetrix Electronics and suitable for smartphone power management, tablet camera subsystems, and DVR memory interface rails requiring stable component supply across high-volume production cycles.
Supply support for NCP139AFCT100T2G 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, and sensor technologies for automotive, industrial, and portable markets.
The NCP139AFCT100T2G belongs to onsemi's VLDO regulator product line, engineered specifically for space-constrained, noise-sensitive battery-powered applications demanding ultra-low dropout and bias-rail flexibility.
FAQ
What is the maximum input voltage rating for the NCP139AFCT100T2G?
The NCP139AFCT100T2G has an absolute maximum VIN rating of 6 V, but its operational input voltage range is specified from VOUT + VDO (i.e., ≥1.05 V) up to 5.5 V. Exceeding 5.5 V on VIN may damage the device or violate safe operating area limits defined in the datasheet.
Does the NCP139AFCT100T2G require an external feedback resistor network?
No-the NCP139AFCT100T2G is a fixed-output 1.00 V variant and does not use an external resistor divider. It employs an internal SNS (sense) pin connected directly to the VOUT net for accurate regulation, eliminating external components required by adjustable versions like NCP139AFCT05ADJT2G.
Is active output discharge supported on the NCP139AFCT100T2G?
Yes-the "A" suffix in NCP139AFCT100T2G denotes inclusion of the active output discharge function. When EN is pulled low, an internal 150 Ω pull-down connects VOUT to GND, discharging the output capacitor rapidly to prevent floating or unintended wake-up in sequenced power systems.
What ceramic capacitor value is recommended for stable operation of the NCP139AFCT100T2G?
A 10 µF X5R or X7R ceramic capacitor is the minimum recommended value for COUT, placed as close as possible to the VOUT and GND pins. The device remains stable with effective capacitance between 10 µF and 22 µF; larger values improve transient response but do not affect stability margins.
Can the NCP139AFCT100T2G operate with VBIAS lower than 3.0 V?
No-VBIAS must be maintained at or above 3.0 V for proper operation. The internal UVLO circuit disables regulation if VBIAS falls below 1.6 V (with 0.2 V hysteresis), and the datasheet explicitly specifies 3.0 V as the minimum functional VBIAS voltage for fixed-output variants like the NCP139AFCT100T2G.
NCP139AFCT100T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-XFBGA, WLCSP
- 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):
- 1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- 85dB ~ 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.2x0.8)
NCP139AFCT100T2G FAQ
1.How can I place an order for NCP139AFCT100T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP139AFCT100T2G 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 NCP139AFCT100T2G reliable?
The price and inventory of NCP139AFCT100T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP139AFCT100T2G is usually 5 days.
3.What payment methods are accepted for NCP139AFCT100T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP139AFCT100T2G transactions.
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4.How is shipping managed for NCP139AFCT100T2G?
NCP139AFCT100T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP139AFCT100T2G 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 NCP139AFCT100T2G?
For technical support, including NCP139AFCT100T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP139AFCT100T2G requirements.
6.How does Aetrix verify that NCP139AFCT100T2G is sourced from the original manufacturer or authorized distributors?
All NCP139AFCT100T2G 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 NCP139AFCT100T2G meets industry standards.
7.What is the process for return or replacement of NCP139AFCT100T2G?
All NCP139AFCT100T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP139AFCT100T2G, 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 NCP139AFCT100T2G part is unused and in its original packaging.
Return procedure for NCP139AFCT100T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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