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onsemi NCV8135AMT040TBG
- Part No.:
- NCV8135AMT040TBG
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
NCV8135AMT040TBG.pdf
- Description:
- IC REG LINEAR 0.4V 500MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
NCV8135AMT040TBG from onsemi is a 500 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate VBIAS rail, delivering 0.4 V fixed output at ±1% accuracy over temperature, 53 mV typical dropout at 500 mA, and ultra-low 35 µA bias quiescent current - designed for space-constrained, noise-sensitive automotive point-of-load regulation.
For engineers reviewing the NCV8135AMT040TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), active discharge capability, WDFN6 wettable-flank package compatibility, and AEC-Q100 qualification for automotive systems requiring stable sub-1V supply rails.
Technical Context
The NCV8135AMT040TBG uses an NMOS pass transistor powered by VIN while internal control circuitry operates from a dedicated VBIAS rail (2.5–5.5 V), enabling ultra-low dropout (53 mV typ. at 500 mA) and high PSRR (90 dB from VBIAS at 1 kHz). Its enable input features hysteresis and supports monotonic soft-start.
It integrates thermal shutdown (160°C trip), current limiting (600–1200 mA), and active output discharge (enabled in "A" variant), and is stable with 10 µF ceramic output capacitors - all optimized for battery-powered automotive subsystems where input voltage may dip below 0.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.4 V - enables direct powering of advanced low-voltage logic cores (e.g., ARM Cortex-A72 LDO domains). |
| Max Output Current | 500 mA - sufficient for SoC I/O rails or sensor interface power in ADAS camera modules. |
| VIN Dropout Voltage | 53 mV typ. at 500 mA - allows operation with VIN as low as 0.453 V, critical for post-buck or battery-depleted scenarios. |
| VBIAS Quiescent Current | 35 µA typ. - minimizes auxiliary rail loading in always-on vehicle networks (e.g., CAN wake-up circuits). |
| Output Accuracy | ±1% over −40°C to +125°C - ensures reliable core voltage compliance across full automotive temperature range. |
| PSRR (VBIAS) | 90 dB at 1 kHz - suppresses noise from noisy bias rails (e.g., shared 3.3 V domain), preserving signal integrity in analog front-ends. |
| Thermal Shutdown | 160°C trip / 140°C release - provides fail-safe protection during sustained overload without latch-up. |
Pinout & Package
NCV8135AMT040TBG is housed in a WDFN6 2 mm × 2 mm package with wettable flanks (Case 511BR), featuring a thermally enhanced exposed pad soldered to PCB ground plane for 97°C/W junction-to-air thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Main input supply rail | Accepts 0.4–5.5 V; powers NMOS pass element - must be decoupled with ≥1 µF ceramic capacitor. |
| 2 - GND | Ground reference | Common return for VIN, VBIAS, EN, SNS, and VOUT; connects to thermal pad for optimal heat dissipation. |
| 3 - VBIAS | Bias supply input | Supplies internal control circuitry (2.5–5.5 V); enables independent optimization of noise/efficiency vs. VIN path. |
| 4 - EN | Logic-enable input | Active-high (VEN(H) = 0.9 V); includes hysteresis for noise immunity in automotive harness environments. |
| 5 - SNS | Output voltage sense | Remote sensing input - connects directly to load-side VOUT node to compensate for PCB trace IR drop. |
| 6 - VOUT | Regulated output | Delivers 0.4 V ±1%; supports active discharge (NCV8135A variant) to rapidly discharge load capacitance during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail architecture (VIN + VBIAS) | Decouples power delivery and control logic - enables ultra-low VIN operation without sacrificing regulation stability or PSRR. |
| Active output discharge | Integrated 150 Ω pull-down (NCV8135A only) discharges VOUT within microseconds after EN deactivation - prevents floating states in multi-rail sequencing. |
| Stable with 10 µF ceramic output cap | Eliminates need for large tantalum or polymer capacitors - reduces BOM cost and board area in compact ADAS ECUs. |
| AEC-Q100 qualified | Validated for automotive applications including engine control, infotainment, and camera modules - meets Grade 1 (−40°C to +125°C) requirements. |
| Ultra-low noise (28.7 µVRMS) | Enables clean power for RF transceivers and high-speed SerDes PHYs operating near 0.4 V supply rails. |
Applications
| Automotive Camera Module Power | ADAS Sensor Hub LDO Rail |
|---|---|
|
Use Scenario: Powering image signal processor (ISP) core voltage in rear-view camera ECU under cold-crank conditions (VIN dips to 0.5 V). IC Role / Device Role / Timing Role: Primary 0.4 V point-of-load regulator with active discharge for controlled power-down during ignition-off transition. Use Value: 53 mV dropout ensures regulation continuity down to 0.453 V input; ±1% accuracy maintains ISP timing margins across −40°C to +105°C ambient. |
Use Scenario: Supplying 0.4 V bias to radar sensor analog front-end (AFE) in 77 GHz ADAS domain controller. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO isolating AFE from noisy digital domain - VBIAS sourced from clean 3.3 V rail. Use Value: 90 dB VBIAS PSRR suppresses switching noise from adjacent DC-DC converters; 28.7 µVRMS noise preserves SNR in RF receive chain. |
| Infotainment SoC I/O Domain | Body Control Module Low-Voltage Logic |
|
Use Scenario: Regulating 0.4 V I/O supply for application processor in head-unit SoC during stop-start engine cycles. IC Role / Device Role / Timing Role: Secondary LDO with remote sensing (SNS) to compensate for PCB voltage drop across 50 mm routing to SoC BGA ball. Use Value: SNS feedback maintains ±1% output accuracy at load point despite 40 mV IR drop; soft-start limits inrush into 1000 µF bulk capacitance. |
Use Scenario: Providing always-on 0.4 V supply to CAN transceiver standby logic in gateway ECU with <10 µA total system leakage budget. IC Role / Device Role / Timing Role: Ultra-low-IQ bias rail regulator - VBIAS supplied from 3.3 V always-on domain; VIN tied to switched 12 V via pre-regulator. Use Value: 35 µA VBIAS quiescent current enables sub-100 µA system sleep current; AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime. |
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 |
|---|---|---|---|
| NCV8135BMT040TBG | No active output discharge; otherwise identical electrical specs and pinout. | Lacks fast VOUT discharge - unsuitable for systems requiring rapid rail collapse during fault recovery. | Select NCV8135BMT040TBG only if active discharge is unnecessary and cost reduction is prioritized. |
| TLD5098EL | Automotive LED driver with integrated 0.4 V LDO; higher IQ (120 µA), no VBIAS rail, 300 mA max output. | Designed for LED biasing - lacks remote sensing, lower current, and no independent bias supply for noise isolation. | Choose TLD5098EL only when combining LED drive and LDO in single-package solution is required; not a functional replacement. |
Compared with NCV8135AMT040TBG, the NCV8135BMT040TBG offers identical regulation performance but omits active discharge, while the TLD5098EL trades LDO flexibility for integrated LED functionality - neither matches the dual-rail noise isolation and 500 mA capability of the NCV8135AMT040TBG.
Availability
NCV8135AMT040TBG is available at Aetrix Electronics and suitable for automotive camera modules, ADAS sensor hubs, and infotainment SoC I/O domains requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for NCV8135AMT040TBG 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, and cloud infrastructure markets.
The NCV8135AMT040TBG belongs to onsemi's automotive-grade VLDO regulator product line, engineered specifically for next-generation vehicle electronics demanding ultra-low voltage, high accuracy, and robustness in harsh environments.
FAQ
What is the minimum input voltage required for NCV8135AMT040TBG to regulate 0.4 V output?
The NCV8135AMT040TBG requires VIN ≥ VOUT + VDO, where typical dropout is 53 mV at 500 mA. Thus, minimum functional VIN is 0.453 V. The device is specified down to 0.4 V input, but regulation is only guaranteed above the dropout threshold. Below that, output follows input linearly - confirmed in Electrical Characteristics and Figure 3 of the datasheet.
Does NCV8135AMT040TBG require external components for stability?
Yes - NCV8135AMT040TBG requires a minimum 10 µF ceramic output capacitor (X5R/X7R, 0603 or larger) placed close to VOUT and GND pins. Input (CIN ≥ 1 µF) and bias (CBIAS ≥ 0.1 µF) capacitors are also recommended. The device is unstable without these; no series resistance or additional compensation is needed per Applications Information section.
Is the SNS pin mandatory for proper operation of NCV8135AMT040TBG?
No - the SNS pin is optional. When unused, it must be connected to VOUT. When used, it enables remote sensing to compensate for PCB trace resistance between the NCV8135AMT040TBG output and the load, improving regulation accuracy at the point of load - especially critical in high-current or long-trace automotive applications.
How does the VBIAS rail improve performance compared to single-input LDOs?
The VBIAS rail powers all internal control circuitry independently of VIN, enabling two key advantages: (1) ultra-low dropout (53 mV) even when VIN is near VOUT, since gate drive for the NMOS pass transistor comes from VBIAS, not VIN; and (2) 90 dB PSRR from VBIAS suppresses noise from shared bias rails - a benefit unavailable in conventional single-rail LDOs like the NCP1117.
What is the purpose of the thermal pad on the NCV8135AMT040TBG WDFN6 package?
The exposed thermal pad on the NCV8135AMT040TBG must be soldered to a PCB ground plane to achieve the rated 97°C/W junction-to-air thermal resistance. It serves both electrical (GND connection) and thermal functions - omitting pad soldering risks thermal shutdown at >300 mW dissipation and violates JEDEC-compliant thermal design guidelines in the datasheet.
NCV8135AMT040TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.1V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- -
- PSRR:
- 73dB ~ 90dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WDFN (2x2)
NCV8135AMT040TBG FAQ
1.How can I place an order for NCV8135AMT040TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8135AMT040TBG 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 NCV8135AMT040TBG reliable?
The price and inventory of NCV8135AMT040TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8135AMT040TBG is usually 5 days.
3.What payment methods are accepted for NCV8135AMT040TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8135AMT040TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8135AMT040TBG?
NCV8135AMT040TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8135AMT040TBG 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 NCV8135AMT040TBG?
For technical support, including NCV8135AMT040TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8135AMT040TBG requirements.
6.How does Aetrix verify that NCV8135AMT040TBG is sourced from the original manufacturer or authorized distributors?
All NCV8135AMT040TBG 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 NCV8135AMT040TBG meets industry standards.
7.What is the process for return or replacement of NCV8135AMT040TBG?
All NCV8135AMT040TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8135AMT040TBG, 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 NCV8135AMT040TBG part is unused and in its original packaging.
Return procedure for NCV8135AMT040TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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