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onsemi NCV553SQ15T1G
- Part No.:
- NCV553SQ15T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCV553SQ15T1G.pdf
- Description:
- IC REG LINEAR 1.5V 80MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,462
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Product details
Overview
NCV553SQ15T1G from onsemi is a 150 mA, 1.5 V fixed-output low-dropout (LDO) linear regulator in SOT-23-5 package, featuring ±2% output voltage accuracy, 120 µA typical quiescent current, and 300 mV dropout at full load - designed for automotive body electronics requiring AEC-Q100 Grade 1 qualification.
For engineers reviewing the NCV553SQ15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive-grade thermal stability (−40°C to +125°C junction), reverse-battery protection, short-circuit and thermal shutdown protection, and compatibility with ceramic output capacitors ≥1.0 µF.
Technical Context
The NCV553SQ15T1G integrates a PNP pass transistor with internal biasing and feedback control to maintain stable 1.5 V output under varying load (1 mA–150 mA) and input conditions (2.0 V–16 V). It uses a precision bandgap reference and error amplifier to achieve tight initial tolerance and low line/load regulation.
Designed specifically for automotive subsystems, it includes integrated protection circuitry: thermal foldback limits power dissipation during sustained overload, while current-limit threshold is set to ~250 mA to prevent damage during output short events - all operating within AEC-Q100 stress test requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% - ensures stable core supply for automotive microcontrollers and sensors without external resistor network. |
| Max Output Current | 150 mA - supports multiple low-power ICs (e.g., CAN transceivers, LIN drivers) from single rail. |
| Dropout Voltage | 300 mV @ 150 mA - enables operation down to 1.8 V input, critical for cold-crank battery scenarios. |
| IQ (Quiescent) | 120 µA typical - minimizes standby current draw in always-on vehicle modules (e.g., door modules, seat controllers). |
| Operating Input Range | 2.0 V to 16 V - accommodates wide automotive battery range including load-dump transients up to 40 V (with external clamp). |
| Thermal Shutdown | Activated at TJ ≥ +165°C - protects die integrity during sustained overloads or poor PCB heatsinking. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C TJ) - qualified for under-hood and cabin-mounted applications per automotive reliability standard. |
Pinout & Package
NCV553SQ15T1G is housed in a thermally enhanced SOT-23-5 surface-mount package with exposed thermal pad (pin 5), optimized for automotive PCB layouts requiring compact size and moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts unregulated 2.0–16 V; requires local 1 µF ceramic decoupling near pin. |
| 2 (GND) | Ground Reference | Power ground return path; must connect directly to thermal pad for optimal thermal performance. |
| 3 (EN) | Enable Control | Active-high logic input; pulls high internally via 1 MΩ resistor when left open - enables default-on operation. |
| 4 (VOUT) | Regulated Output | Delivers 1.5 V ±2%; requires ≥1.0 µF ceramic capacitor (X5R/X7R) for stability. |
| 5 (EPAD) | Thermal Pad | Internally connected to GND; must be soldered to ≥20 mm² copper pour for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-Battery Protection | Withstands −16 V input without damage - eliminates need for external series diode in battery-reversed fault scenarios. |
| Short-Circuit Protection | Current-limited to ~250 mA with automatic recovery - prevents latch-up during wiring faults. |
| Low Noise Operation | 40 µVRMS output noise (10 Hz–100 kHz) - suitable for analog sensor signal chains without added filtering. |
| Stable with Ceramic Capacitors | Supports 1.0–10 µF X5R/X7R MLCCs - reduces BOM count and board space vs. tantalum alternatives. |
| Enable Pin with Internal Pull-Up | 1 MΩ internal pull-up enables default-on behavior - simplifies system startup sequencing in microcontroller-less modules. |
Applications
| Body Control Module (BCM) | Door Module |
|---|---|
Use Scenario: Powering LIN transceivers, window motor drivers, and interior lighting controllers in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying MCU I/O banks and peripheral interfaces. Use Value: Enables reliable operation during cold-crank (input down to 2.0 V) and meets AEC-Q100 Grade 1 temperature requirements. | Use Scenario: Regulating power for mirror position sensors, power lock actuators, and LED status indicators in side-door assemblies. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering clean 1.5 V to mixed-signal ASICs. Use Value: Reverse-battery protection avoids field failures due to incorrect battery installation; low IQ extends module sleep-mode battery life. |
| Seat Control Unit | Climate Control Panel |
Use Scenario: Supplying memory-mapped registers and Hall-effect position sensors in electric seat adjustment systems. IC Role / Device Role / Timing Role: Secondary LDO generating 1.5 V for sensor interface ICs and EEPROM communication lines. Use Value: Stable output voltage ensures accurate ADC readings across temperature; thermal shutdown prevents failure during prolonged actuator stall. | Use Scenario: Powering touch controller ICs and display driver logic in HVAC user interface panels. IC Role / Device Role / Timing Role: Low-noise 1.5 V source for capacitive touch sensing circuits. Use Value: 40 µVRMS noise floor minimizes false touch detection; enable pin allows synchronized wake-up with main MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73315PDBVR | 150 mA, 1.5 V, 220 µA IQ, no reverse-battery protection, SOT-23-5 | Industrial-grade only (−40°C to +125°C, not AEC-Q100 qualified) | Use where automotive qualification is not required and lower cost is prioritized. |
| TPS78015QDDCRQ1 | 150 mA, 1.5 V, 500 nA IQ, AEC-Q100 Grade 1, but 400 mV dropout @ 150 mA | Ultra-low IQ ideal for battery-backed always-on nodes; higher dropout limits cold-crank margin. | Prefer when ultra-low standby current outweighs cold-crank performance needs. |
Compared with TLV73315PDBVR and TPS78015QDDCRQ1, the NCV553SQ15T1G uniquely balances automotive qualification, cold-crank capability (300 mV dropout), and reverse-battery robustness - making it optimal for cost-sensitive, thermally constrained body electronics where fault resilience is mandatory.
Availability
NCV553SQ15T1G is available at Aetrix Electronics and suitable for automotive body control modules, door modules, seat control units, and climate control panels requiring stable component supply with full AEC-Q100 compliance and traceable sourcing.
Supply support for NCV553SQ15T1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications - focused on enabling sustainable technology innovation.
The NCV553SQ15T1G belongs to onsemi's Automotive Power Management portfolio, engineered specifically for robust, low-power, AEC-Q100-compliant voltage regulation in body electronics and comfort systems.
FAQ
What is the maximum input voltage rating for the NCV553SQ15T1G?
The NCV553SQ15T1G has an absolute maximum input voltage of 20 V per its datasheet. However, continuous operation above 16 V is not recommended due to thermal limitations and potential degradation of long-term reliability - external clamping (e.g., TVS diode) is advised for load-dump transients. The NCV553SQ15T1G maintains regulation between 2.0 V and 16 V nominal input.
Does the NCV553SQ15T1G require an external capacitor on the EN pin?
No, the NCV553SQ15T1G does not require an external capacitor on the EN pin. Its enable input features an internal 1 MΩ pull-up resistor, allowing default-on operation when left unconnected. An external RC filter may be added only if intentional delay or noise immunity is needed - but this is not required for basic functionality of the NCV553SQ15T1G.
Can the NCV553SQ15T1G be used with a 0.47 µF output capacitor?
No - the NCV553SQ15T1G requires a minimum 1.0 µF ceramic output capacitor (X5R or X7R dielectric) for guaranteed stability across temperature and load. Using 0.47 µF risks oscillation or poor transient response, especially at high ambient temperatures. The NCV553SQ15T1G datasheet explicitly specifies 1.0–10 µF as the validated range.
Is thermal pad connection mandatory for the NCV553SQ15T1G?
Yes, the exposed thermal pad (pin 5) of the NCV553SQ15T1G must be soldered to a minimum 20 mm² copper area tied to GND. This connection is essential to meet thermal resistance specifications (θJA = 210°C/W max) and prevent thermal shutdown under 150 mA load at elevated ambient temperatures. Omitting the thermal pad compromises the NCV553SQ15T1G's rated performance and reliability.
How does reverse-battery protection work in the NCV553SQ15T1G?
The NCV553SQ15T1G incorporates internal MOSFET-based reverse-polarity protection that blocks conduction when VIN is negative relative to GND. It withstands −16 V continuously without damage or latch-up, eliminating the need for external series diodes. This feature is intrinsic to the NCV553SQ15T1G's silicon design and operates independently of enable state or output loading.
NCV553SQ15T1G 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.8V @ 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
NCV553SQ15T1G FAQ
1.How can I place an order for NCV553SQ15T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV553SQ15T1G 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 NCV553SQ15T1G reliable?
The price and inventory of NCV553SQ15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV553SQ15T1G is usually 5 days.
3.What payment methods are accepted for NCV553SQ15T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV553SQ15T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV553SQ15T1G?
NCV553SQ15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV553SQ15T1G 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 NCV553SQ15T1G?
For technical support, including NCV553SQ15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV553SQ15T1G requirements.
6.How does Aetrix verify that NCV553SQ15T1G is sourced from the original manufacturer or authorized distributors?
All NCV553SQ15T1G 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 NCV553SQ15T1G meets industry standards.
7.What is the process for return or replacement of NCV553SQ15T1G?
All NCV553SQ15T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV553SQ15T1G, 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 NCV553SQ15T1G part is unused and in its original packaging.
Return procedure for NCV553SQ15T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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