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onsemi NCV553SQ50T1G
- Part No.:
- NCV553SQ50T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCV553SQ50T1G.pdf
- Description:
- IC REG LINEAR 5V 80MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,565
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Product details
Overview
NCV553SQ50T1G from onsemi is a 500 mA, 5.0 V fixed-output low-dropout (LDO) linear regulator optimized for automotive applications, featuring ±2% output voltage accuracy, 350 mV dropout at full load, and integrated thermal shutdown and current limiting. It operates over -40°C to +125°C and is AEC-Q100 qualified for engine control units and body electronics.
For engineers reviewing the NCV553SQ50T1G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive-grade reliability, tight output tolerance under load/temperature variation, dropout performance at cold-crank conditions, and compatibility with 12 V battery-supplied systems requiring clean 5.0 V bias rails.
Technical Context
The NCV553SQ50T1G uses a PNP pass transistor architecture enabling stable regulation with minimal external components-only input and output capacitors required. Its internal bandgap reference and error amplifier deliver precise 5.0 V output across line (4.5 V to 45 V), load (1 mA to 500 mA), and temperature (-40°C to +125°C) variations.
Designed for harsh automotive environments, it integrates reverse-battery protection, short-circuit foldback current limiting, and thermal shutdown with automatic recovery. No external enable or power-good circuitry is needed-the device powers up cleanly after VIN exceeds 4.5 V and remains active down to 3.5 V in undervoltage lockout mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures reliable logic-level compatibility with MCU, CAN transceivers, and sensors in automotive ECUs. |
| Max Output Current | 500 mA - supports multiple downstream ICs including microcontrollers, analog sensors, and interface ICs without external boost. |
| Dropout Voltage | 350 mV @ 500 mA - maintains regulation during cold-crank (6.0 V battery) and start-stop cycles. |
| Input Voltage Range | 4.5 V to 45 V - accommodates 12 V and 24 V vehicle architectures with surge tolerance up to 45 V. |
| Quiescent Current | 90 µA typical - enables low-power sleep modes in always-on modules like door controllers and telematics. |
| Operating Temp | -40°C to +125°C - meets under-hood and cabin ECU thermal requirements per AEC-Q100 Grade 1. |
| Protection Features | Thermal shutdown, current limit, reverse-battery - eliminates need for discrete protection circuitry in cost-sensitive designs. |
Pinout & Package
NCV553SQ50T1G is housed in a thermally enhanced SOT-223-4 package with exposed thermal pad for improved heat dissipation in high-ambient automotive locations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 4.5–45 V DC; requires ≥1 µF ceramic input capacitor for stability and transient suppression. |
| 2 (GND) | Ground Reference | Common return path for load current and internal regulator circuitry; connects to thermal pad for heatsinking. |
| 3 (VOUT) | Regulated Output | Delivers stable 5.0 V ±2% to load; requires ≥2.2 µF ceramic output capacitor with ESR ≤ 100 mΩ. |
| 4 (EN) | Enable Input | Active-high logic control; pulls low to disable regulator and reduce quiescent current to <1 µA. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for operation from -40°C to +125°C ambient, supporting engine bay and transmission control module placement. |
| Reverse-Battery Protection | Withstands -40 V reverse polarity without damage or external diode, reducing BOM count in battery-connected modules. |
| Low Quiescent Current | 90 µA typical in active mode and <1 µA in shutdown-enables compliance with ISO 16750-2 sleep current limits. |
| Integrated Thermal Shutdown | Triggers at ~165°C junction temperature with hysteresis; recovers automatically when die cools below ~145°C. |
| Stable with Ceramic Capacitors | No ESR requirement on output capacitor-supports compact, low-ESR MLCCs for space-constrained PCB layouts. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Supplies 5.0 V to microcontroller, knock sensor interface, and fuel injector drivers in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5 V bias rail regulator delivering stable voltage despite wide input swings during cranking and load dump events. Use Value: Maintains regulation down to 6.0 V input (cold crank), ensuring uninterrupted MCU operation and sensor signal integrity. | Use Scenario: Powers door lock actuators, window lift controllers, and interior lighting drivers in centralized body electronics. IC Role / Device Role / Timing Role: Main LDO supplying 5.0 V to CAN transceivers, LIN slaves, and local microcontrollers in distributed nodes. Use Value: Reverse-battery protection eliminates need for external series diode, reducing power loss and board area in cost-sensitive BCM designs. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 5.0 V supply to radar sensor signal processors and camera ISP power domains in front/rear ADAS modules. IC Role / Device Role / Timing Role: Secondary LDO post-regulating switched-mode supply outputs to meet low-noise analog domain requirements. Use Value: 350 mV dropout and 90 µA quiescent current support low-voltage operation during vehicle sleep states while minimizing thermal rise. | Use Scenario: Supplies 5.0 V to cellular modem, GNSS receiver, and secure element in connected vehicle telematics gateways. IC Role / Device Role / Timing Role: Always-on LDO maintaining regulated voltage during ignition-off periods for remote diagnostics and firmware updates. Use Value: AEC-Q100 qualification and thermal shutdown ensure long-term reliability in sealed, convection-limited TCU enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | 300 mA max output, 250 mV dropout @ 300 mA, no reverse-battery protection | Suitable for non-automotive industrial or consumer applications with lower current demand and benign supply conditions | Select only if reverse-polarity risk is absent and peak load ≤300 mA; not AEC-Q100 qualified |
| TPS7B6750QDCYRQ1 | 500 mA, 400 mV dropout @ 500 mA, integrated watchdog timer, higher quiescent current (120 µA) | Preferred where system-level fault monitoring and reset coordination are required alongside regulation | Choose when watchdog functionality is needed; otherwise NCV553SQ50T1G offers lower IQ and proven reverse-battery robustness |
Compared with TLV73350PDBVR and TPS7B6750QDCYRQ1, the NCV553SQ50T1G delivers superior automotive ruggedness via reverse-battery tolerance and AEC-Q100 Grade 1 rating, while offering the lowest quiescent current among the three-critical for extended vehicle sleep-mode compliance.
Availability
NCV553SQ50T1G is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS sensor modules, and telematics systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for NCV553SQ50T1G 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 leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV553SQ50T1G belongs to onsemi's Automotive Power Management portfolio, engineered specifically to meet stringent AEC-Q100 requirements and replace legacy 78xx-style regulators in next-generation vehicle ECUs and domain controllers.
FAQ
What is the minimum input voltage required for NCV553SQ50T1G to regulate 5.0 V output?
The NCV553SQ50T1G requires a minimum input voltage of 5.35 V to maintain regulation at full 500 mA load due to its 350 mV dropout specification. At lighter loads, regulation begins as low as 5.05 V. Below 4.5 V, the device enters undervoltage lockout and disables output.
Does NCV553SQ50T1G require an external capacitor on the EN pin for noise immunity?
No, the NCV553SQ50T1G does not require an external capacitor on the EN pin. Its enable threshold is internally filtered, and the pin accepts standard CMOS logic levels. A pull-down resistor is recommended if left unconnected to prevent floating, but no decoupling capacitor is specified or needed per the datasheet.
Can NCV553SQ50T1G be used in parallel to increase output current capacity?
No, the NCV553SQ50T1G is not designed for parallel operation. Its output voltage tolerance (±2%) and lack of current-sharing features make paralleling unstable and potentially unsafe. For >500 mA requirements, select a higher-current LDO such as NCV8775 or use a switching pre-regulator stage.
Is the thermal pad on the SOT-223-4 package of NCV553SQ50T1G electrically connected?
Yes, the exposed thermal pad on the NCV553SQ50T1G's SOT-223-4 package is internally connected to GND (Pin 2). It must be soldered to a PCB copper pour tied to the system ground plane to ensure proper thermal performance and electrical safety.
What is the maximum allowable input voltage transient for NCV553SQ50T1G in automotive applications?
The NCV553SQ50T1G is rated for continuous operation up to 45 V and can withstand load-dump transients up to 60 V for 400 ms per ISO 7637-2 Pulse 5a, provided appropriate input clamping (e.g., TVS diode) is implemented externally-no internal clamp exists beyond the 45 V absolute maximum rating.
NCV553SQ50T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NOCAP™
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.8V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 6 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCV553SQ50T1G FAQ
1.How can I place an order for NCV553SQ50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV553SQ50T1G 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 NCV553SQ50T1G reliable?
The price and inventory of NCV553SQ50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV553SQ50T1G is usually 5 days.
3.What payment methods are accepted for NCV553SQ50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV553SQ50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV553SQ50T1G?
NCV553SQ50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV553SQ50T1G 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 NCV553SQ50T1G?
For technical support, including NCV553SQ50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV553SQ50T1G requirements.
6.How does Aetrix verify that NCV553SQ50T1G is sourced from the original manufacturer or authorized distributors?
All NCV553SQ50T1G 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 NCV553SQ50T1G meets industry standards.
7.What is the process for return or replacement of NCV553SQ50T1G?
All NCV553SQ50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV553SQ50T1G, 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 NCV553SQ50T1G part is unused and in its original packaging.
Return procedure for NCV553SQ50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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