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onsemi NCV500SN185T1G
- Part No.:
- NCV500SN185T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV500SN185T1G.pdf
- Description:
- IC REG LINEAR 1.85V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,347
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Product details
Overview
NCV500SN185T1G from onsemi is an automotive-grade, fixed-output 1.85 V low-dropout linear regulator with 150 mA output current, ultra-low 170 mV dropout at full load, 50 µV RMS noise (10 Hz–100 kHz, no bypass cap), and AEC-Q100 qualification. It serves as a precision post-regulator for noise-sensitive RF stages and camera sensor power in automotive ADAS modules.
For engineers reviewing the NCV500SN185T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.85 V ±2.5% output accuracy over −40°C to +125°C, enable input compatible with 1.0 V logic, and DFN 2×2.2 mm package optimized for space-constrained automotive PCBs.
Technical Context
The NCV500SN185T1G employs a PMOS pass transistor architecture enabling ultra-low dropout and eliminating the need for external noise-bypass capacitors. Its internal protection includes thermal shutdown (trip at ~160°C) and current limiting (~540 mA typical), with fast 20 µs enable turn-on time critical for power sequencing in automotive infotainment systems.
Designed for operation across 1.8 V to 6.0 V input range, it maintains tight line regulation (≤10 mV) and load regulation (≤45 mV) while delivering stable 1.85 V output under dynamic loads up to 150 mA - essential for powering low-voltage image signal processors and RF synthesizers requiring clean, ripple-free bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.85 V ±2.5% (ensures stable bias for 1.8 V domain sensors without margin violation) |
| Max Output Current | 150 mA (supports moderate-power camera modules and RF front-ends) |
| Dropout Voltage | 170 mV at 150 mA (enables operation from single-cell Li-ion down to 2.02 V) |
| Noise (RMS) | 50 µV (10 Hz–100 kHz, no bypass cap required - reduces BOM count and board area) |
| Enable Threshold | 0.9 V logic-high turn-on (direct interface with 1.0 V FPGA I/O or microcontroller GPIO) |
| Quiescent Current | 175 µA at 150 mA load (minimizes standby power in always-on ADAS vision nodes) |
| Ripple Rejection | 62 dB at 1 kHz (suppresses switching noise from upstream DC/DC converters) |
Pinout & Package
NCV500SN185T1G uses the DFN 2×2.2 mm, 6-pin package (Case 506BA) with exposed thermal pad for enhanced thermal performance in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Active-high digital control; pulled to Vin if unused; enables fast 20 µs startup |
| 2 | GND | Power ground reference; connects to thermal pad for heat dissipation |
| 3 | Vin | Input supply (1.8–6.0 V); requires 1.0 µF ceramic decoupling capacitor |
| 4 | Vout | Regulated 1.85 V output; stable with ≥1.0 µF ceramic output capacitor |
| 5 | N/C | No internal connection; must be left floating or grounded per layout best practice |
| 6 | GND | Second ground terminal; improves PSRR and thermal conduction via dual GND path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 170 mV @ 150 mA enables use with aging or cold-temperature batteries in automotive telematics |
| No external bypass cap | 50 µV RMS noise achieved internally - eliminates component, footprint, and reliability risk of external capacitor |
| AEC-Q100 qualified | Qualified for automotive applications including temperature grade 1 (−40°C to +125°C junction) |
| Fast enable response | 20 µs turn-on time supports precise power sequencing in multi-rail ADAS ECUs |
| Pb-free & RoHS compliant | Meets automotive environmental compliance requirements and reflow process standards (J-STD-020, 235°C peak) |
Applications
| Automotive Camera Power | RF Front-End Bias |
|---|---|
Use Scenario: Powering CMOS image sensors and ISP cores in rear-view and surround-view camera modules. IC Role / Device Role / Timing Role: Primary low-noise post-regulator supplying clean 1.85 V to sensor analog and digital domains. Use Value: 50 µV RMS noise prevents image banding; 170 mV dropout extends runtime from 12 V system via intermediate 2.5 V rail. | Use Scenario: Providing stable bias to VCOs, LNAs, and mixers in automotive radar transceivers. IC Role / Device Role / Timing Role: Low-phase-noise voltage source for RF signal chain components requiring minimal supply-induced jitter. Use Value: 62 dB ripple rejection suppresses DC/DC switching artifacts; AEC-Q100 rating ensures reliability in under-hood radar units. |
| ADAS Domain Controller Core | Infotainment SoC I/O Rail |
Use Scenario: Supplying auxiliary 1.85 V rails for safety-critical microcontroller peripherals in zonal ECU designs. IC Role / Device Role / Timing Role: Fault-tolerant LDO with thermal shutdown and current limit protecting downstream logic. Use Value: 150 mA capacity supports multiple CAN/FlexRay transceivers; 1.0 V logic-compatible enable simplifies MCU-controlled power management. | Use Scenario: Regulating power to display interface circuitry (LVDS, MIPI D-PHY) in head-unit displays. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO ensuring signal integrity on high-speed serial links. Use Value: 20 µs enable time aligns with display controller initialization sequence; DFN 2×2.2 mm fits tight bezel layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73318PDBVR | 1.8 V output (not 1.85 V); 200 mA max; 250 mV dropout at 200 mA; no AEC-Q100 rating | Targeted at consumer portables, not automotive; lacks thermal shutdown threshold documentation | Select only for non-automotive cost-sensitive designs where 50 mV higher dropout and missing automotive qualification are acceptable |
| TPS7A05185YKAR | 1.85 V output; 200 mA; 175 mV dropout; AEC-Q100 Grade 2 (−40°C to +105°C); no integrated enable | Requires external enable circuitry; lower temp grade limits use in engine bay or radar modules | Choose when higher current is needed and ambient temperature stays ≤105°C; add discrete enable logic if sequencing required |
Compared with TLV73318PDBVR and TPS7A05185YKAR, the NCV500SN185T1G uniquely delivers 1.85 V output with AEC-Q100 Grade 1 qualification, integrated logic-level enable, and lowest noise among automotive-qualified 150 mA LDOs - making it the only drop-in solution for safety-critical camera and radar power rails.
Availability
NCV500SN185T1G is available at Aetrix Electronics and suitable for automotive camera modules, radar transceivers, and ADAS domain controllers requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for NCV500SN185T1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV500 series is designed specifically for automotive power management - delivering low-noise, low-dropout regulation with AEC-Q100 qualification and robust thermal protection for safety-critical electronic control units.
FAQ
What is the output voltage tolerance of the NCV500SN185T1G over temperature and load?
The NCV500SN185T1G maintains output voltage within ±2.5% of 1.85 V across −40°C to +125°C junction temperature and 1.0 mA to 150 mA load current, as specified in the Electrical Characteristics table for the 1.85 V variant. This accuracy ensures reliable operation of 1.8 V domain ICs without derating concerns.
Does the NCV500SN185T1G require an external noise-bypass capacitor?
No, the NCV500SN185T1G achieves 50 µV RMS output noise (10 Hz–100 kHz) without any external bypass capacitor due to its internal low-noise architecture. This eliminates BOM cost, PCB area, and potential failure modes associated with external ceramic capacitors.
What is the maximum input voltage rating for the NCV500SN185T1G?
The NCV500SN185T1G has a maximum input voltage rating of 6.0 V, with absolute maximum ratings specifying −0.3 V to Vin + 0.3 V on all pins. Operation beyond 6.0 V requires external pre-regulation, as detailed in Figure 34 of the datasheet.
How does the enable function operate on the NCV500SN185T1G?
The NCV500SN185T1G enable pin is active-high with a typical turn-on threshold of 0.9 V and turn-off threshold of 0.15 V. When unused, it must be tied to Vin. The device achieves 20 µs output turn-on time from enable assertion, supporting tight power sequencing in automotive ECUs.
Is the NCV500SN185T1G pin-compatible with other variants in the NCV500 family?
Yes, all NCV500 DFN 2×2.2 mm variants (including NCV500SN185T1G) share identical pinout and package dimensions. This allows design reuse across output voltages (1.8 V to 5.0 V) without PCB layout changes - provided thermal and routing constraints are maintained.
NCV500SN185T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.01V @ 1mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 300 µA
- PSRR:
- 62dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCV500SN185T1G FAQ
1.How can I place an order for NCV500SN185T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV500SN185T1G 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 NCV500SN185T1G reliable?
The price and inventory of NCV500SN185T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV500SN185T1G is usually 5 days.
3.What payment methods are accepted for NCV500SN185T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV500SN185T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV500SN185T1G?
NCV500SN185T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV500SN185T1G 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 NCV500SN185T1G?
For technical support, including NCV500SN185T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV500SN185T1G requirements.
6.How does Aetrix verify that NCV500SN185T1G is sourced from the original manufacturer or authorized distributors?
All NCV500SN185T1G 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 NCV500SN185T1G meets industry standards.
7.What is the process for return or replacement of NCV500SN185T1G?
All NCV500SN185T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV500SN185T1G, 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 NCV500SN185T1G part is unused and in its original packaging.
Return procedure for NCV500SN185T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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