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onsemi NCP565D2T12R4G
- Part No.:
- NCP565D2T12R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
NCP565D2T12R4G.pdf
- Description:
- IC REG LINEAR 1.2V 1.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
NCP565D2T12R4G from onsemi is a fixed-output, 1.2 V, 1.5 A low-dropout linear regulator in D2PAK-3 package. It delivers ultra-fast load transient response (≤1.0 µs), maintains 0.9 V internal reference with ±2% accuracy over −10°C to +105°C, and features thermal shutdown at 160°C and current limit of 3.3 A typical - ideal for post-regulation in server power supplies and ASIC core voltage rails.
For engineers reviewing the NCP565D2T12R4G datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, validated D2PAK-3 terminal mapping, confirmed automotive-grade alternatives, and design-critical thermal and stability guidance derived directly from onsemi's official datasheet Rev. 20 (June 2024).
Technical Context
The NCP565D2T12R4G integrates a precision 0.9 V bandgap reference, low-impedance output stage, and fast-response error amplifier optimized for high-current, low-voltage regulation. Its architecture supports stable operation with ceramic, tantalum, or aluminum-electrolytic output capacitors (≥1.0 µF, ESR 50 mΩ–2.5 Ω) and achieves <10 mV output deviation during 10 mA ↔ 1.5 A load steps.
Protection circuitry includes foldback current limiting (3.3 A typ), thermal shutdown (160°C), and short-circuit robustness. Input voltage range is 2.5 V to 9 V, with dropout voltage specified at 0.9 V (typ) at 1.5 A load - enabling efficient operation in tight VIN–VOUT margins common in multi-rail server and telecom systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2% (−10°C to +105°C); ensures stable core supply for FPGA I/O banks and ASIC logic rails. |
| Max Output Current | 1.5 A continuous; supports high-current point-of-load regulation without external pass devices. |
| Dropout Voltage | 0.9 V (typ) at 1.5 A; enables operation with only 2.1 V input for 1.2 V output - critical for battery-backed or low-VIN systems. |
| Ground Current | 1.5 mA (typ) at 1.5 A load; minimizes quiescent power loss in always-on subsystems. |
| Ripple Rejection | 85 dB (120 Hz), 75 dB (1 kHz); suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF circuits. |
| Thermal Shutdown | 160°C junction temperature; provides fail-safe protection during sustained overload or inadequate heatsinking. |
| Output Noise | 38 µVrms (100 Hz–100 kHz, 1.2 V output); low enough for noise-sensitive analog signal chains and PLL power domains. |
Pinout & Package
D2PAK-3 (Case 936) package with exposed tab thermally and electrically connected to Ground. Compact 10.2 mm × 9.3 mm footprint, 4.7 mm height, Pb-free (G suffix), rated for 83°C/W junction-to-ambient thermal resistance with 100 mm² copper heat spreader.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 2.5 V to 9 V; must be bypassed with ≥150 µF low-ESR capacitor placed adjacent to pin for optimal transient response. |
| 2 - Ground | Power ground reference | Common return for input/output paths and thermal tab; requires low-inductance connection to PCB ground plane. |
| 3 - Vout | Regulated output | Delivers fixed 1.2 V at up to 1.5 A; output capacitor network (≥1.0 µF, ESR 50 mΩ–2.5 Ω) must be placed within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | ≤1.0 µs recovery time for 10 mA ↔ 1.5 A load steps - preserves voltage integrity in burst-mode digital loads. |
| Low ground current | 1.5 mA at full 1.5 A load - reduces system-level standby power by >50% vs. legacy LDOs. |
| Low-noise regulation | 38 µVrms output noise (100 Hz–100 kHz) - avoids jitter degradation in clock distribution networks. |
| Integrated protection | Current limit (3.3 A typ), thermal shutdown (160°C), and short-circuit hardening - eliminates need for external fault management circuitry. |
| Pb-free & automotive qualified | AEC-Q100 Grade 1 compliant (−40°C to +125°C ambient); suitable for industrial control and automotive infotainment power rails. |
Applications
| Server Power Distribution | ASIC Core Voltage Regulation |
|---|---|
|
Use Scenario: Post-regulation stage supplying 1.2 V to high-performance ASICs in 1U rack servers with strict ripple and transient requirements. IC Role / Device Role / Timing Role: Final-stage LDO delivering clean, tightly regulated 1.2 V from intermediate 3.3 V or 5 V bus. Use Value: 85 dB ripple rejection and ≤10 mV load transient deviation ensure ASIC timing margin compliance under dynamic workloads. |
Use Scenario: Dedicated core voltage rail for FPGA configuration logic and I/O banks requiring stable 1.2 V with minimal noise coupling. IC Role / Device Role / Timing Role: Low-noise, high-current LDO isolating sensitive digital logic from noisy switching supply domains. Use Value: 38 µVrms output noise prevents setup/hold violations in high-speed SerDes interfaces powered from same rail. |
| Industrial PLC I/O Modules | Telecom Line Card Biasing |
|
Use Scenario: Powering isolated analog sensor front-ends and ADC drivers in programmable logic controller modules operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-stable 1.2 V reference source and bias supply for precision op-amps and voltage references. Use Value: ±2% output tolerance over temperature and 160°C thermal shutdown enable reliable long-term operation in unventilated enclosures. |
Use Scenario: Providing bias voltage to RF amplifiers and transceivers on telecom line cards where EMI immunity and thermal resilience are critical. IC Role / Device Role / Timing Role: Immune-to-noise LDO decoupling RF stages from shared 3.3 V backplane supply. Use Value: 75 dB ripple rejection at 1 kHz suppresses switching artifacts from adjacent DC/DC converters, preserving RF signal integrity. |
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 |
|---|---|---|---|
| NCV565D2T12R4G | Automotive-grade variant: AEC-Q100 qualified, PPAP-capable, identical electrical specs and pinout. | Required for automotive infotainment, ADAS camera modules, and body control units needing qualification documentation. | Select NCV565D2T12R4G when automotive qualification, extended temperature validation (−40°C to +125°C ambient), or PPAP support is mandatory. |
| TPS7A4701RGWR | Lower noise (4.7 µVrms), lower max current (1 A), SOIC-20 package; no integrated thermal shutdown. | Better suited for ultra-low-noise analog signal chains (e.g., audio DACs, precision ADCs) but lacks current capability and protection for digital loads. | Choose TPS7A4701RGWR only for noise-critical analog rails where 1.5 A current and thermal protection are not required. |
Compared with NCP565D2T12R4G, NCV565D2T12R4G adds automotive qualification without sacrificing performance or footprint, while TPS7A4701RGWR trades current capacity and integrated protection for ultra-low noise - making each suitable for distinct system-level priorities: qualification rigor, power density, or analog purity.
Availability
NCP565D2T12R4G is available at Aetrix Electronics and suitable for server power distribution, ASIC core voltage regulation, and industrial PLC I/O modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for NCP565D2T12R4G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NCP565 series was designed specifically for high-current, low-noise post-regulation in demanding computing and communications infrastructure - emphasizing fast transient response, thermal resilience, and automotive-grade reliability.
FAQ
What is the maximum input voltage rating for the NCP565D2T12R4G?
The NCP565D2T12R4G 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 not characterized and may compromise long-term reliability or parametric performance. The minimum input voltage is determined by the dropout requirement: Vin ≥ Vout + Vdo = 1.2 V + 0.9 V = 2.1 V, rounded up to 2.5 V per datasheet specification.
Does the NCP565D2T12R4G require external compensation components?
No, the NCP565D2T12R4G is internally compensated and remains stable with standard output capacitors (≥1.0 µF, ESR 50 mΩ–2.5 Ω) including ceramic, tantalum, and aluminum-electrolytic types. The datasheet confirms stability without external compensation, and recommends using a 150 µF OSCON capacitor in parallel with a 10 µF OSCON for optimal transient response and AC stability.
What thermal resistance values apply to the NCP565D2T12R4G in D2PAK-3 package?
The NCP565D2T12R4G in D2PAK-3 (Case 936) has a thermal resistance of RJA = 83°C/W (junction-to-ambient) and RJP = 4°C/W (junction-to-pin), measured with a 100 mm² copper heat spreader and 1 oz copper thickness. These values assume proper PCB layout with the exposed tab soldered to a large ground plane - insufficient copper area will degrade thermal performance significantly.
Is the NCP565D2T12R4G pin-compatible with adjustable-output versions of the NCP565 family?
No, the NCP565D2T12R4G (D2PAK-3, fixed 1.2 V) is not pin-compatible with adjustable-output variants like NCP565D2TR4G (D2PAK-5), which include an ADJ pin. The D2PAK-3 package has only three pins (Vin, GND, Vout), while D2PAK-5 adds NC and ADJ pins. PCB layout and footprint must be redesigned to switch between fixed and adjustable versions.
What is the output voltage tolerance of the NCP565D2T12R4G over temperature?
The NCP565D2T12R4G guarantees a fixed 1.2 V output with ±2% tolerance over the operating junction temperature range of −10°C to +105°C, and ±3% tolerance over the extended range of −40°C to +125°C. This is confirmed in the Electrical Characteristics table for the 1.2 V fixed version under both temperature conditions.
NCP565D2T12R4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
NCP565D2T12R4G FAQ
1.How can I place an order for NCP565D2T12R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP565D2T12R4G 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 NCP565D2T12R4G reliable?
The price and inventory of NCP565D2T12R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP565D2T12R4G is usually 5 days.
3.What payment methods are accepted for NCP565D2T12R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP565D2T12R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP565D2T12R4G?
NCP565D2T12R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP565D2T12R4G 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 NCP565D2T12R4G?
For technical support, including NCP565D2T12R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP565D2T12R4G requirements.
6.How does Aetrix verify that NCP565D2T12R4G is sourced from the original manufacturer or authorized distributors?
All NCP565D2T12R4G 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 NCP565D2T12R4G meets industry standards.
7.What is the process for return or replacement of NCP565D2T12R4G?
All NCP565D2T12R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP565D2T12R4G, 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 NCP565D2T12R4G part is unused and in its original packaging.
Return procedure for NCP565D2T12R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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