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onsemi NCV551SN32T1G
- Part No.:
- NCV551SN32T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV551SN32T1G.pdf
- Description:
- IC REG LINEAR 3.2V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,701
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Product details
Overview
NCV551SN32T1G from onsemi is an automotive-grade, fixed-output 3.2 V low-dropout linear regulator in TSOP-5 package, delivering up to 150 mA output current with 4.0 µA typical quiescent current, ±2.0% output voltage accuracy over −40 °C to +125 °C, and 150 mV dropout at 10 mA - designed for battery-powered instrumentation requiring ultra-low standby power.
For engineers reviewing the NCV551SN32T1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for AEC-Q100-compliant embedded power design.
Technical Context
The NCV551SN32T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, thermal shutdown, and current-limit protection - enabling stable regulation without external compensation. Its enable input supports logic-controlled shutdown with 1.3 V turn-on threshold and 0.3 V turn-off threshold.
Designed for ceramic capacitor compatibility, it operates with as little as 0.1 µF output capacitance and maintains regulation across 0–12 V input range. The device achieves 100 ppm/°C output voltage temperature coefficient and exhibits 40 mV load regulation (10–150 mA) and 30 mV line regulation (Vin = Vout+1 V to 12 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2 V ±2.0% at 10 mA, −40 °C to +125 °C - ensures stable MCU core or sensor rail under automotive thermal stress. |
| Max Output Current | 150 mA - sufficient to power microcontrollers, RF transceivers, or analog front-ends in compact portable systems. |
| Quiescent Current | 4.0 µA typical (Enable = 0 V) - enables multi-year battery life in always-on telematics or ECU wake-up circuits. |
| Dropout Voltage | 150 mV at 10 mA - allows operation from partially discharged 3.7 V Li-ion cells down to ~3.35 V input. |
| Input Voltage Range | 0 to 12 V - supports direct connection to automotive 12 V bus with transient tolerance when paired with input clamp. |
| Thermal Shutdown | Activates at ~160 °C junction - protects against sustained overload or poor PCB thermal design without external circuitry. |
| Package | TSOP-5 (Case 483), 3.0 × 1.5 × 0.95 mm - surface-mount compatible with high-density automotive PCB layouts. |
Pinout & Package
NCV551SN32T1G is housed in a 5-pin TSOP-5 (SOT-23-5/SC-59-5) surface-mount package with exposed pad not electrically connected. Pin 4 is Vout; Pin 1 is Vin; Pin 2 is GND; Pin 3 is Enable; Pin 4 is N/C (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 0–12 V; requires local 0.1 µF decoupling capacitor placed adjacent to pin. |
| 2 | GND | Power ground reference - must be routed with low-impedance trace to minimize noise coupling into regulation loop. |
| 3 | Enable | Active-high digital control input - pulls low to disable regulator; if unused, tie directly to Vin to ensure always-on operation. |
| 4 | N/C | No internal connection - left floating; no PCB trace or solder mask required. |
| 5 | Vout | Regulated 3.2 V output - drives load; requires ≥0.1 µF ceramic output capacitor placed within 2 mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive applications per Grade 1 (−40 °C to +125 °C ambient), supporting PPAP documentation. |
| Pb-free & RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709E - suitable for green manufacturing and export compliance. |
| Ultra-low IQ | 4.0 µA typical quiescent current enables >10-year battery life in low-duty-cycle sensor nodes. |
| Ceramic capacitor stable | Stable with 0.1 µF–10 µF ceramic output capacitors - eliminates need for tantalum or electrolytic parts. |
| Integrated protection | Includes thermal shutdown and current limit - prevents latch-up or destruction during short-circuit or overtemperature events. |
Applications
| Automotive Body Control Module (BCM) | Industrial Handheld Data Logger |
|---|---|
Use Scenario: Powering CAN transceiver and microcontroller in door module with intermittent wake-up via LIN bus. IC Role / Device Role / Timing Role: Primary 3.2 V LDO supplying MCU core and CAN PHY, enabled only during active communication windows. Use Value: 4.0 µA quiescent current minimizes parasitic drain on 12 V vehicle battery during multi-week sleep cycles. |
Use Scenario: Regulating power for ADC, flash memory, and BLE radio in field-deployed environmental sensor node. IC Role / Device Role / Timing Role: Fixed 3.2 V supply for mixed-signal subsystem; Enable pin synchronized to measurement burst timing. Use Value: ±2.0% output accuracy ensures consistent ADC reference scaling across −40 °C to +85 °C operating range. |
| Medical Portable Pulse Oximeter | Smart Home Occupancy Sensor |
Use Scenario: Providing clean, low-noise 3.2 V rail to optical sensor array and signal conditioning op-amps. IC Role / Device Role / Timing Role: Low-ESR-stable LDO powering analog front-end; bypassed during LED drive pulses to reduce ripple. Use Value: 150 mV dropout enables full 3.2 V output from aging 3.6 V lithium coin cell until end-of-life. |
Use Scenario: Supplying PIR motion detector IC and sub-GHz transceiver in battery-operated wall switch. IC Role / Device Role / Timing Role: Always-on 3.2 V regulator feeding ultra-low-power MCU in deep-sleep mode between occupancy events. Use Value: TSOP-5 footprint allows placement directly beneath MCU on compact 2-layer PCB without thermal vias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8170DS330T1G | 3.3 V output, 250 mA max, 2.5 µA IQ, SOT-23-5 package - lower quiescent current but 0.1 V higher nominal output. | Requires minor firmware adjustment if 3.3 V tolerance exceeds system margin; better for newer designs targeting tighter IQ. | Select when <2.5 µA IQ is mandatory and 3.3 V output is acceptable; verify thermal derating at 150 mA. |
| TLV73332PDBVR | 3.2 V output, 300 mA max, 65 µA IQ, SOT-23-5 - higher IQ but wider input range (1.4–5.5 V) and better PSRR. | Suitable for USB-powered or single-cell Li-ion systems where input never exceeds 5.5 V; not automotive-qualified. | Choose for non-automotive portable designs needing higher output current and improved noise rejection, not AEC-Q100 compliance. |
Compared with NCV551SN32T1G, NCV8170DS330T1G offers lower quiescent current but shifts output to 3.3 V, while TLV73332PDBVR trades automotive qualification for higher current and better AC performance - making NCV551SN32T1G optimal for cost-sensitive, thermally constrained AEC-Q100 applications requiring exact 3.2 V.
Availability
NCV551SN32T1G is available at Aetrix Electronics and suitable for automotive body electronics, industrial handheld instruments, and medical portable devices requiring stable component supply with long-term lifecycle support.
Supply support for NCV551SN32T1G 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 and sensing solutions for automotive, industrial, and cloud power applications.
The NCV551 series belongs to onsemi's automotive-qualified LDO portfolio, engineered specifically for AEC-Q100 Grade 1 environments where reliability, low quiescent current, and thermal robustness are critical in battery-backed ECUs and sensors.
FAQ
What is the maximum input voltage rating for NCV551SN32T1G?
The NCV551SN32T1G has a maximum input voltage rating of 12 V, as specified in its Absolute Maximum Ratings table. Operation above this level risks permanent damage. For automotive applications with load-dump transients exceeding 12 V, an external TVS diode or pre-regulator circuit (e.g., Figure 24 in the datasheet) is required to protect the NCV551SN32T1G.
Is NCV551SN32T1G still in active production?
No - NCV551SN32T1G is officially marked as discontinued by onsemi, as confirmed in the Ordering Information table (page 11) and Revision History (page 13) of the NCP551/NCV551 datasheet Rev. 20 (January 2026). Aetrix Electronics maintains limited legacy stock and supports obsolescence mitigation planning for customers transitioning from NCV551SN32T1G.
What is the dropout voltage of NCV551SN32T1G at full 150 mA load?
The datasheet does not specify dropout voltage at 150 mA for the 3.2 V variant. However, for 3.1–5.0 V versions (including NCV551SN32T1G), dropout is specified as 150 mV typical at 10 mA. At 150 mA, expected dropout is ≤220 mV based on Figure 2 and Figure 3 (ground current vs. load), confirming usable headroom from a 3.6 V Li-ion cell even under full load.
Can NCV551SN32T1G operate with a 0.1 µF ceramic output capacitor?
Yes - the NCV551SN32T1G is explicitly characterized for stability with a minimum 0.1 µF ceramic output capacitor, as stated in the datasheet "Features" and "Applications Information" sections. Larger values (e.g., 1–10 µF) improve load transient response but are not required for basic regulation.
Does NCV551SN32T1G require an input capacitor?
Yes - a 0.1 µF ceramic input capacitor is recommended and should be placed as close as possible to the Vin and GND pins. This reduces high-frequency noise and improves line transient response, as detailed in the "Applications Information" section (page 9) of the datasheet.
NCV551SN32T1G 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):
- 12V
- Voltage - Output (Min/Fixed):
- 3.2V
- 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
NCV551SN32T1G FAQ
1.How can I place an order for NCV551SN32T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV551SN32T1G 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 NCV551SN32T1G reliable?
The price and inventory of NCV551SN32T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV551SN32T1G is usually 5 days.
3.What payment methods are accepted for NCV551SN32T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV551SN32T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV551SN32T1G?
NCV551SN32T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV551SN32T1G 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 NCV551SN32T1G?
For technical support, including NCV551SN32T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV551SN32T1G requirements.
6.How does Aetrix verify that NCV551SN32T1G is sourced from the original manufacturer or authorized distributors?
All NCV551SN32T1G 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 NCV551SN32T1G meets industry standards.
7.What is the process for return or replacement of NCV551SN32T1G?
All NCV551SN32T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV551SN32T1G, 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 NCV551SN32T1G part is unused and in its original packaging.
Return procedure for NCV551SN32T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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