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onsemi NCV551SN28T1G
- Part No.:
- NCV551SN28T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV551SN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
NCV551SN28T1G from onsemi is an automotive-grade, fixed-output 2.8 V low-dropout linear regulator with ultra-low quiescent current (4.0 µA typical), 150 mA output capability, and PMOS pass transistor architecture. It operates from 0–12 V input, delivers ±2.0% output voltage accuracy over −40 °C to +125 °C, and is designed for battery-powered instrumentation requiring stable low-power biasing.
For engineers reviewing the NCV551SN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, TSOP-5 package thermal performance (RJA = 250 °C/W), enable-controlled standby mode, and compatibility with 0.1 µF ceramic output capacitors.
Technical Context
The NCV551SN28T1G implements a PMOS-based LDO topology with internal voltage reference, error amplifier, and protection circuits including thermal shutdown and current limiting. Its dropout voltage is 170 mV at 10 mA load, enabling operation with minimal input–output differential in space-constrained automotive subsystems.
Enable functionality provides logic-level control (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V) to disable the regulator and reduce ground current to near-zero. The device achieves stable regulation without minimum load requirement and supports wide-range output capacitor ESR (up to 3.0 Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.0% over −40 °C to +125 °C - ensures stable MCU core or sensor bias under automotive thermal stress. |
| Max Input Voltage | 12 V - compatible with 12 V vehicle battery systems including cold-crank transients when used with external pre-regulation. |
| Quiescent Current | 4.0 µA typical at no load - enables multi-year battery life in always-on telematics or sensor nodes. |
| Dropout Voltage | 170 mV at 10 mA - allows regulation down to Vin = 2.97 V, critical for deep-discharge Li-ion or alkaline battery operation. |
| Output Current | 150 mA continuous - sufficient to power microcontrollers, CAN transceivers, or small displays in body electronics modules. |
| Thermal Shutdown | Activates at ~160 °C - protects against PCB overheating during sustained high-power dissipation or poor layout. |
| Enable Threshold | VEN(HI) = 1.3 V, VEN(LO) = 0.3 V - interfaces directly with 1.8 V/3.3 V logic without level-shifting. |
Pinout & Package
NCV551SN28T1G is housed in a TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for compact automotive PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 0–12 V; requires local 0.1 µF ceramic decoupling per datasheet recommendation. |
| 2 - GND | Power supply ground | Must be routed with low-impedance trace to minimize noise coupling and ensure stable regulation. |
| 3 - Enable | Logic-controlled enable input | Pull high to Vin to activate; pull low to disable and reduce ground current to <1 µA. |
| 4 - N/C | No internal connection | Not bonded; must remain unconnected - floating or tied to GND/Vin has no functional effect. |
| 5 - Vout | Regulated output voltage | Delivers 2.8 V ±2.0%; supports 0.1–10 µF ceramic or tantalum output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive applications (Grade 1: −40 °C to +125 °C ambient), supporting PPAP documentation. |
| Ultra-low IQ | 4.0 µA typical enables >10-year battery life in always-on vehicle sensors and remote keyless entry receivers. |
| Stable with ceramic caps | Requires only 0.1 µF output capacitance - eliminates need for costly tantalum or polymer capacitors. |
| PMOS pass element | Eliminates reverse-current path and enables true zero-load ground current in shutdown mode. |
| Thermal & current protection | Internally limits output current and shuts down at ~160 °C - prevents field failures due to overload or poor heatsinking. |
Applications
| Automotive Body Control Module | Industrial Handheld Scanner |
|---|---|
Use Scenario: Powering microcontroller, EEPROM, and LIN transceiver in door module with 12 V battery input subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying core logic and communication peripherals. Use Value: AEC-Q100 qualification and 12 V max input rating allow direct connection to vehicle battery rail with minimal external protection. | Use Scenario: Battery-powered barcode scanner operating from two AA cells (1.8–3.2 V) requiring regulated 2.8 V for CMOS image sensor and decode ASIC. IC Role / Device Role / Timing Role: Low-IQ LDO maintaining stable supply during intermittent active scanning bursts. Use Value: 170 mV dropout enables full utilization of battery capacity down to 2.97 V, extending runtime by >15% vs. higher-dropout alternatives. |
| Telematics GPS Receiver | Medical Portable Monitor |
Use Scenario: Providing clean 2.8 V bias to GPS RF front-end and baseband processor in always-on vehicle tracking unit. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail isolating GPS LNA from digital switching noise. Use Value: Ultra-low 4.0 µA quiescent current minimizes self-heating and preserves signal integrity in thermally isolated RF sections. | Use Scenario: Powering low-power ECG analog front-end and Bluetooth LE radio in FDA Class II portable patient monitor running on rechargeable Li-ion. IC Role / Device Role / Timing Role: Precision 2.8 V supply ensuring ADC reference stability and RF transmit consistency. Use Value: ±2.0% output accuracy over full temperature range maintains clinical-grade measurement repeatability without calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73328PDBVR | 300 mA output, 220 mV dropout at 300 mA, 55 µA IQ, SOT-23-5 package | Higher output current but 14× higher quiescent current - unsuitable for multi-year battery life requirements | Select only if >200 mA load or lower-cost industrial qualification suffices |
| TPS78028DRVR | 150 mA output, 250 nA IQ, 250 mV dropout at 150 mA, WSON-6 package | Lower IQ but non-AEC-Q100, limited to −40 °C to +125 °C junction (not ambient), no enable pin | Prefer for ultra-low-power medical wearables where automotive qualification is unnecessary |
Compared with TLV73328PDBVR and TPS78028DRVR, the NCV551SN28T1G uniquely balances automotive qualification, ultra-low IQ, and enable control in a compact TSOP-5 footprint-making it optimal for cost-sensitive, safety-conscious automotive body electronics where long-term reliability and thermal robustness are mandatory.
Availability
NCV551SN28T1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial handheld scanners, telematics GPS receivers, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV551SN28T1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV551 series belongs to onsemi's automotive-qualified analog power portfolio, engineered specifically for reliable, low-quiescent-current voltage regulation in harsh-temperature vehicle subsystems such as door modules, seat controls, and infotainment interfaces.
FAQ
What is the maximum input voltage rating for the NCV551SN28T1G?
The NCV551SN28T1G has a maximum input voltage rating of 12 V, as specified in the Absolute Maximum Ratings table. This allows direct integration into standard 12 V automotive battery systems, though external transient suppression is recommended for load-dump events exceeding this limit. Operation above 12 V risks permanent damage and voids warranty compliance.
Does the NCV551SN28T1G require an external output capacitor, and what value is recommended?
Yes, the NCV551SN28T1G requires an external output capacitor for stability. The datasheet specifies a minimum value of 0.1 µF ceramic capacitor placed close to the Vout and GND pins. Larger values (e.g., 1–10 µF) improve load transient response and noise rejection but are not mandatory for basic regulation. Tantalum capacitors are also supported.
Is the NCV551SN28T1G pin-compatible with other variants in the NCV551 family?
Yes, all NCV551 variants-including NCV551SN28T1G-share identical TSOP-5 pinout and package dimensions. Output voltage is set internally, so swapping between NCV551SN25T1G, NCV551SN30T1G, or NCV551SN33T1G requires only a BOM change and no PCB redesign, provided input voltage and load requirements remain within spec.
What is the thermal resistance (RJA) of the NCV551SN28T1G in standard PCB layout?
The NCV551SN28T1G exhibits a junction-to-ambient thermal resistance (RJA) of 250 °C/W when mounted on an 80 × 80 × 1.5 mm FR4 PCB with 1 oz copper and 100 mm² copper spreading area, per JEDEC JESD51-2 test conditions. This value assumes no additional heatsinking; actual RJA improves with larger copper planes or thermal vias.
How does the enable function operate on the NCV551SN28T1G, and what happens when it is left unconnected?
The Enable pin (Pin 3) activates the regulator when pulled ≥1.3 V and disables it when ≤0.3 V. If left unconnected, leakage paths may cause unpredictable behavior; the datasheet explicitly states that unused Enable pins must be tied to Vin to guarantee proper operation. Floating Enable is not a valid configuration and risks intermittent regulation failure.
NCV551SN28T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 10mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 8 µA
- Current - Supply (Max):
- 8 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCV551SN28T1G FAQ
1.How can I place an order for NCV551SN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV551SN28T1G 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 NCV551SN28T1G reliable?
The price and inventory of NCV551SN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV551SN28T1G is usually 5 days.
3.What payment methods are accepted for NCV551SN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV551SN28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV551SN28T1G?
NCV551SN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV551SN28T1G 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 NCV551SN28T1G?
For technical support, including NCV551SN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV551SN28T1G requirements.
6.How does Aetrix verify that NCV551SN28T1G is sourced from the original manufacturer or authorized distributors?
All NCV551SN28T1G 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 NCV551SN28T1G meets industry standards.
7.What is the process for return or replacement of NCV551SN28T1G?
All NCV551SN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV551SN28T1G, 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 NCV551SN28T1G part is unused and in its original packaging.
Return procedure for NCV551SN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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