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onsemi NCV565ST12T3G
- Part No.:
- NCV565ST12T3G
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NCV565ST12T3G.pdf
- Description:
- IC REG LINEAR 1.2V 1.5A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
NCV565ST12T3G from onsemi is an automotive-grade, fixed-output 1.2 V low-dropout linear regulator delivering up to 1.5 A with 0.9 V reference voltage, 0.9 V dropout at 1.5 A load, and ultra-fast transient response optimized for post-regulation in ASIC power supplies and server applications.
For engineers reviewing the NCV565ST12T3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal characteristics, SOT−223 package layout guidance, and AEC−Q100-compliant design considerations for high-reliability embedded power systems.
Technical Context
The NCV565ST12T3G integrates a precision 0.9 V bandgap reference, current-limit sense circuitry (3.3 A typ), and thermal shutdown (160°C) into a single monolithic IC. Its fast loop response enables stable regulation under rapid load transients typical in microprocessor core supplies.
Designed for automotive and industrial environments, it operates across −40°C to +125°C ambient temperature with input voltage range of 2.5 V to 9 V and supports ceramic, tantalum, and aluminum-electrolytic output capacitors down to 1.0 µF with ESR between 50 mΩ and 2.5 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2% (−10 to 105°C), ±3% (−40 to 125°C) - ensures stable core logic supply under wide thermal conditions |
| Maximum Output Current | 1.5 A continuous - sufficient for FPGA I/O banks or ASIC auxiliary rails |
| Dropout Voltage | 0.9 V at 1.5 A load - enables operation from 2.5 V input when regulating 1.2 V output |
| Ground Current | 1.5 mA at 1.5 A load - minimizes quiescent power loss in always-on subsystems |
| Ripple Rejection | 85 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters |
| Thermal Shutdown Threshold | 160°C junction - provides fail-safe protection during overload or poor heatsinking |
| Reference Voltage | 0.9 V ±2% - sets output accuracy and enables precise feedback network design |
Pinout & Package
SOT−223 package (Case 318E), thermally enhanced with tab connected to ground. Pin 1 = Ground, Pin 2 = Vout, Pin 3 = Vin. Tab serves as primary thermal path and electrical ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Ground | Power ground reference and primary thermal conduction path via exposed tab |
| Pin 2 | Vout | Regulated 1.2 V output - requires low-ESR capacitor placement within 3 mm for stability |
| Pin 3 | Vin | Input supply (2.5–9 V) - must be bypassed with ≥10 µF capacitor near pin for transient immunity |
| Tab | Ground | Low-impedance thermal and electrical ground - must be soldered to ≥50 mm² copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | Sub-1 µs recovery from 10 mA ↔ 1.5 A load steps - maintains voltage within ±40 mV per Figures 13–16 |
| Low-noise regulation | 28 µVrms output noise (100 Hz–100 kHz) - suitable for analog sensor biasing and RF subsystems |
| AEC−Q100 qualification | Qualified for automotive Grade 1 (−40°C to +125°C ambient) with PPAP capability - meets functional safety readiness requirements |
| Robust protection suite | Integrated current limit (3.3 A typ), short-circuit foldback, and thermal shutdown - eliminates need for external fault management |
| Pb-free packaging | RoHS-compliant SOT−223 with "G" suffix - compatible with lead-free reflow profiles per J-STD-020 |
Applications
| Automotive ADAS Camera Module Power | Industrial PLC I/O Isolation Rail |
|---|---|
Use Scenario: Powers image signal processor (ISP) and MIPI interface in rear-view camera module operating in engine bay. IC Role / Device Role / Timing Role: Primary 1.2 V core regulator for ISP, providing clean, low-noise supply with fast load step recovery during frame capture bursts. Use Value: Maintains <±30 mV output deviation during 1.5 A load transients, preventing ISP lockup or image corruption in vibration-prone environments. |
Use Scenario: Supplies isolated 1.2 V logic rail for digital input/output conditioning circuits in programmable logic controller backplane. IC Role / Device Role / Timing Role: Post-regulator following isolated DC/DC converter, ensuring tight voltage tolerance and ripple rejection for accurate level-shifting. Use Value: 85 dB ripple rejection at 120 Hz suppresses coupling from 50/60 Hz mains-derived isolation supplies, eliminating false trigger events. |
| Server Baseboard Management Controller (BMC) | Medical Diagnostic Imaging Sensor Interface |
Use Scenario: Delivers 1.2 V to ARM-based BMC SoC in 1U rack server where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Low-quiescent, high-current LDO replacing inefficient buck converter for low-power standby domain. Use Value: 1.5 mA ground current at full 1.5 A load reduces idle power by >40% versus legacy regulators, extending system uptime during maintenance windows. |
Use Scenario: Powers analog front-end (AFE) of ultrasound transducer array requiring ultra-low-noise bias for signal integrity. IC Role / Device Role / Timing Role: Precision 1.2 V reference source for ADC driver stage, directly referenced to internal 0.9 V bandgap. Use Value: 28 µVrms noise floor enables >14-bit ENOB in 16-bit medical ADCs without additional filtering stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8664ST12T3G | Lower max current (500 mA), higher dropout (1.1 V at 500 mA), same 1.2 V fixed output and SOT−223 package | Targeted for lower-power MCU cores or sensors - insufficient for 1.5 A ASIC loads | Select only if load current remains ≤500 mA and thermal margin allows higher dropout |
| TLV73312PDBVR | Higher accuracy (±1%), lower IQ (50 µA), but rated only to 300 mA and not AEC−Q100 qualified | Optimized for battery-powered portable devices - lacks automotive reliability and current capability | Use only in non-automotive, low-current applications where ultra-low quiescent current is critical |
Compared with NCV565ST12T3G, NCV8664ST12T3G trades current capability for cost and footprint efficiency, while TLV73312PDBVR sacrifices automotive qualification and output current for precision and ultra-low IQ - neither offers drop-in replacement capability.
Availability
NCV565ST12T3G is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial PLCs, server BMCs, and medical imaging subsystems requiring stable component supply with AEC−Q100 compliance and long-term lifecycle support.
Supply support for NCV565ST12T3G 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 management, analog, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The NCV565ST12T3G belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for high-reliability post-regulation in safety-critical systems where AEC−Q100 compliance, thermal robustness, and fast transient response are mandatory.
FAQ
What is the maximum input voltage rating for the NCV565ST12T3G?
The NCV565ST12T3G has an absolute maximum input voltage rating of 18 V, but its recommended operating input voltage range is 2.5 V to 9 V. Operation above 9 V is permissible only under transient conditions and must remain within safe operating area limits defined in the datasheet's thermal and SOA curves. The device is optimized for inputs just above dropout - e.g., 2.5 V for 1.2 V output.
Does the NCV565ST12T3G require an external capacitor on the ADJ pin?
No - the NCV565ST12T3G is a fixed-output variant (1.2 V) and does not expose or utilize the ADJ pin. Its internal feedback network is trimmed during manufacturing. The ADJ pin is absent in the SOT−223 pinout; only Pins 1 (GND), 2 (Vout), and 3 (Vin) are active. This eliminates external resistor selection errors and improves production yield.
How does the thermal performance of the NCV565ST12T3G compare in SOT−223 versus D2PAK packages?
In SOT−223 (Case 318E), the NCV565ST12T3G has RJA = 107°C/W and RJP = 12°C/W with 50 mm² copper; in D2PAK (Case 936), RJA drops to 83°C/W and RJP to 4°C/W with 100 mm² copper. For 1.5 A operation at 125°C ambient, SOT−223 requires ≥100 mm² copper to stay below 150°C junction, while D2PAK achieves same with ~50 mm² - making D2PAK preferable for high-power density designs.
Is the NCV565ST12T3G pin-compatible with other onsemi 1.2 V LDOs in SOT−223?
No - the NCV565ST12T3G uses a non-standard SOT−223 pinout: Pin 1 = GND, Pin 2 = Vout, Pin 3 = Vin. Most onsemi SOT−223 LDOs (e.g., NCV8664 series) use Pin 1 = Vin, Pin 2 = GND, Pin 3 = Vout. PCB layout must be verified against Case 318E mechanical drawing; direct substitution without board revision will cause functional failure.
What output capacitor ESR range ensures stability for the NCV565ST12T3G?
The NCV565ST12T3G remains stable with output capacitors having ESR between 50 mΩ and 2.5 Ω, including ceramic, tantalum, and aluminum-electrolytic types. For optimal transient response, onsemi recommends pairing a 150 µF OSCON capacitor (low ESR) with a 10 µF OSCON capacitor (high-frequency decoupling). Capacitor placement within 3 mm of Pin 2 (Vout) is mandatory to preserve stability.
NCV565ST12T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 3 mA
- Current - Supply (Max):
- -
- PSRR:
- 85dB ~ 75db (120Hz ~ 1kHz)
- 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:
- SOT-223 (TO-261)
NCV565ST12T3G FAQ
1.How can I place an order for NCV565ST12T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV565ST12T3G 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 NCV565ST12T3G reliable?
The price and inventory of NCV565ST12T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV565ST12T3G is usually 5 days.
3.What payment methods are accepted for NCV565ST12T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV565ST12T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV565ST12T3G?
NCV565ST12T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV565ST12T3G 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 NCV565ST12T3G?
For technical support, including NCV565ST12T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV565ST12T3G requirements.
6.How does Aetrix verify that NCV565ST12T3G is sourced from the original manufacturer or authorized distributors?
All NCV565ST12T3G 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 NCV565ST12T3G meets industry standards.
7.What is the process for return or replacement of NCV565ST12T3G?
All NCV565ST12T3G units undergo pre-shipment inspection (PSI). If there is an issue with NCV565ST12T3G, 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 NCV565ST12T3G part is unused and in its original packaging.
Return procedure for NCV565ST12T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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