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onsemi NCV8509PDW18R2
- Part No.:
- NCV8509PDW18R2
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8509PDW18R2.pdf
- Description:
- IC REG LINEAR 3.3V/1.8V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
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Product details
Overview
NCV8509PDW18R2 from onsemi is an automotive-grade dual linear voltage regulator with sequenced power-up, delivering 3.3 V ±2% @ 115 mA (VOUT1) and 1.8 V ±2% @ 100 mA (VOUT2) to protect microcontroller I/O and core logic during startup. It features programmable slew rate control, dual-drive RESET with 0 V validity, thermal shutdown, and power shunt functionality for optimized on-chip dissipation in telematics and powertrain ECUs.
For engineers reviewing the NCV8509PDW18R2 datasheet, pinout, applications, or equivalent options, key selection criteria include output sequencing integrity, RESET threshold hysteresis (18 mV), SLEW-controlled rise time (469 V/s typical for VOUT1), quiescent current (175 µA typ at light load), and AEC-Q100 qualification for automotive under-hood environments.
Technical Context
The NCV8509PDW18R2 implements independent error amplifiers and bandgap references for each output, enabling precise tracking and independent regulation of VOUT1 (3.3 V) and VOUT2 (1.8 V). Its dual-drive RESET circuit derives power from both VIN1 and VOUT1, ensuring valid reset assertion down to 0 V on either rail.
Power shunt operation uses external REX to route part of VOUT2 current through VIN2, reducing on-die power dissipation-critical for high-input-voltage automotive transients up to 50 V. SLEW pin controls rise time via a 6.0 µA internal current source charging CSLEW, with gain-dependent output slew rates confirmed per variant (469 V/s for 3.3 V/1.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT1 | 3.3 V ±2% (1.0–100 mA load); maintains I/O rail stability during MCU boot |
| VOUT2 | 1.8 V ±2% (1.0–100 mA load); powers low-voltage core logic with tight tolerance |
| Quiescent Current | 175 µA typical (IOUT1 = IOUT2 = 100 µA, VIN1 = 12 V); enables ultra-low standby power in always-on modules |
| RESET Threshold Hysteresis | 18 mV (for 1.8 V option); prevents chatter during brownout recovery |
| VOUT1 SLEW Rate | 469 V/s typical (CSLEW = 33 nF); ensures controlled, non-oscillatory power-up sequence |
| Thermal Shutdown | 150–210 °C trip range (guaranteed by design); protects against sustained overload or ambient overtemperature |
| Input Voltage Range | VIN1: −0.3 to 50 V DC; supports 12 V/24 V automotive battery systems with load dump immunity |
Pinout & Package
NCV8509PDW18R2 uses a 16-lead SOIC wide-body package with exposed pad (Case 751AG, PDW suffix), providing low thermal resistance (RθJA = 57 °C/W, RθJC = 16 °C/W) for automotive under-hood thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SLEW (Pin 1) | Output rise-time control input | Charged by 6.0 µA internal current source; sets VOUT1/VOUT2 ramp rate via external capacitor |
| Delay (Pin 2) | RESET timing capacitor node | Sources 6.0 µA to CDelay; determines RESET assertion delay after regulation is achieved |
| GND (Pin 3) | Power and signal reference | Common return for both regulators and internal comparators; connects to exposed thermal pad |
| NC (Pins 4,5,7–9,11,14,16) | No connection | Internally unconnected; must be left floating or tied to GND per layout best practice |
| RESET (Pin 6) | Active-low reset output | Dual-drive structure ensures validity down to 0 V on VIN1 or VOUT1; drives external MCU reset pin |
| VOUT2 (Pin 10) | Core supply output | 1.8 V ±2%, 100 mA max; powers microcontroller core domain with ESD-protected I/O interface |
| VIN2 (Pin 12) | Secondary input for VOUT2 | Accepts shunted current via REX; reduces on-die dissipation when VIN1 > 4.5 V |
| VIN1 (Pin 13) | Main input for VOUT1 and bias | Supplies VOUT1, internal circuitry, and RESET drive; rated to 50 V transient |
| VOUT1 (Pin 15) | I/O supply output | 3.3 V ±2%, 115 mA max; powers MCU I/O banks with sequencing priority over VOUT2 |
Key Features
| Feature | Design Value |
|---|---|
| Sequenced Power-Up | VOUT1 ramps before VOUT2 to prevent I/O latch-up and ensure safe core initialization in modern MCUs |
| Programmable SLEW Rate | Adjustable rise time (e.g., 469 V/s for 3.3 V) via single external capacitor-no firmware or external IC needed |
| Dual-Drive RESET | Valid reset signal maintained even if VOUT1 collapses to 0 V (powered by VIN1) or VIN1 drops to 0 V (powered by VOUT1) |
| Power Shunt (REX) | Offloads VOUT2 current path to VIN2 via external resistor, reducing on-die power by up to 1.07 W at 18 V input |
| AEC-Q100 Qualified | Qualified for Grade 1 (−40 °C to +125 °C junction) with PPAP capability-meets automotive production requirements |
Applications
| Automotive Powertrain Control Unit | Telematics Gateway Module |
|---|---|
Use Scenario: Engine control unit requiring isolated, sequenced 3.3 V I/O and 1.8 V core rails during cold-crank (5.5 V battery) and load-dump (50 V transient) conditions. IC Role / Device Role / Timing Role: Dual linear regulator enforcing strict VOUT1-before-VOUT2 power-up order to prevent MCU I/O damage during startup. Use Value: Prevents I/O latch-up and ESD structure stress by guaranteeing 3.3 V rail stabilizes before 1.8 V core activates-validated across −40 °C to +125 °C. | Use Scenario: Cellular/V2X telematics module needing low-quiescent-current dual-rail supply with fail-safe RESET signaling during ignition cycling. IC Role / Device Role / Timing Role: Sequenced regulator with dual-drive RESET that remains valid down to 0 V on either input or output, ensuring deterministic MCU reset. Use Value: Eliminates need for external supervisor IC; RESET stays asserted until both rails are stable, improving boot reliability in noisy vehicle electrical systems. |
| ADAS Camera ECU | Body Control Module (BCM) |
Use Scenario: Automotive camera ECU with image sensor (1.8 V core) and MIPI interface (3.3 V I/O) requiring glitch-free power sequencing during wake-from-sleep transitions. IC Role / Device Role / Timing Role: Linear regulator with programmable SLEW control to match sensor startup timing and avoid digital interface lockup. Use Value: Adjustable 469 V/s slew rate ensures VOUT1 reaches 3.3 V within 7.1 ms (33 nF), aligning precisely with sensor initialization windows. | Use Scenario: BCM managing door locks, lighting, and diagnostics with always-on 3.3 V I/O and periodic 1.8 V core activation. IC Role / Device Role / Timing Role: Low-IQ dual regulator (175 µA typ) minimizing battery drain during sleep mode while supporting fast wake-up sequencing. Use Value: Enables <10 µA system standby current when paired with MCU-controlled EN logic-verified at −40 °C and 125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-sequenced linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8509PDW18G | Rail-packaged (47 units), same electrical specs and pinout as NCV8509PDW18R2 | Lower volume prototyping; no tape-and-reel handling required | Select for evaluation or low-volume builds where reel logistics are unnecessary |
| TLV7073318PDPWR | Single-chip dual LDO without power shunt, RESET hysteresis (±1.5%), no SLEW control, 200 µA IQ | Limited to ≤6 V input; unsuitable for automotive transients or high-accuracy sequencing | Only for non-automotive, low-voltage (<6 V) applications where cost and footprint outweigh sequencing fidelity |
Compared with NCV8509PDW18G, the NCV8509PDW18R2 offers tape-and-reel packaging for automated assembly, while TLV7073318PDPWR lacks power shunt, SLEW control, and AEC-Q100 qualification-making it unsuitable for automotive use cases requiring robust sequencing and transient resilience.
Availability
NCV8509PDW18R2 is available at Aetrix Electronics and suitable for automotive powertrain control units, telematics gateway modules, and ADAS camera ECUs requiring stable component supply with full AEC-Q100 compliance and PPAP documentation support.
Supply support for NCV8509PDW18R2 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV8509PDW18R2 belongs to the NCV8509 Series of automotive-qualified dual sequenced linear regulators, designed specifically to protect next-generation microcontrollers during power-up in harsh automotive environments with wide input voltage ranges and precise output tracking.
FAQ
What is the exact output voltage configuration of the NCV8509PDW18R2?
The NCV8509PDW18R2 delivers a fixed dual-output configuration: VOUT1 = 3.3 V ±2% (115 mA max) and VOUT2 = 1.8 V ±2% (100 mA max). This pairing is confirmed by the "18" suffix in the part number per onsemi's marking diagram and ordering table, and is validated in the Electrical Characteristics tables for the 3.3 V/1.8 V option.
Does the NCV8509PDW18R2 support power shunt functionality, and how is it implemented?
Yes, the NCV8509PDW18R2 supports power shunt via its VIN2 pin and external REX resistor. When VIN1 exceeds ~4.5 V, internal circuitry routes part of VOUT2 current through VIN2, offloading dissipation from the die. The recommended REX value is calculated as (VINmax − 4.5 V)/IOUT2(max), e.g., 135 Ω for 100 mA at 18 V input-reducing on-die power by over 1 W.
What is the RESET behavior of the NCV8509PDW18R2 during power loss?
The NCV8509PDW18R2 features dual-drive RESET: it remains valid down to 0 V on VOUT1 (powered by VIN1) or down to 0 V on VIN1 (powered by VOUT1). For the 1.8 V option, RESET deasserts at 96.5% of VOUT1 (1.737 V) with 18 mV hysteresis, ensuring clean release without chatter during brownout recovery.
Can the slew rate of the NCV8509PDW18R2 be adjusted, and what capacitor value achieves the typical 469 V/s for VOUT1?
Yes, the slew rate is set by the CSLEW capacitor on the SLEW pin. A 33 nF capacitor yields the typical 469 V/s slew rate for the 3.3 V/1.8 V variant, as confirmed in the Electrical Characteristics table and Figure 22. The internal 6.0 µA current source charges CSLEW linearly, and output slew is gain-scaled (≈3.9×) from the SLEW pin ramp.
Is the NCV8509PDW18R2 qualified for automotive applications, and what standards does it meet?
Yes, the NCV8509PDW18R2 carries the NCV prefix indicating automotive qualification. It is AEC-Q100 Grade 1 qualified (−40 °C to +125 °C junction), PPAP-capable, and Pb-free. Thermal shutdown (150–210 °C), 50 V peak transient rating on VIN1, and guaranteed operation across automotive battery profiles confirm its suitability for powertrain and body electronics.
NCV8509PDW18R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 50V
- Voltage - Output (Min/Fixed):
- 3.3V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA, -
- Current - Output:
- 115mA, 100mA
- Current - Quiescent (Iq):
- 175 µA
- Current - Supply (Max):
- 10 mA
- PSRR:
- -
- Control Features:
- Reset
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCV8509PDW18R2 FAQ
1.How can I place an order for NCV8509PDW18R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8509PDW18R2 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 NCV8509PDW18R2 reliable?
The price and inventory of NCV8509PDW18R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8509PDW18R2 is usually 5 days.
3.What payment methods are accepted for NCV8509PDW18R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8509PDW18R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8509PDW18R2?
NCV8509PDW18R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8509PDW18R2 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 NCV8509PDW18R2?
For technical support, including NCV8509PDW18R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8509PDW18R2 requirements.
6.How does Aetrix verify that NCV8509PDW18R2 is sourced from the original manufacturer or authorized distributors?
All NCV8509PDW18R2 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 NCV8509PDW18R2 meets industry standards.
7.What is the process for return or replacement of NCV8509PDW18R2?
All NCV8509PDW18R2 units undergo pre-shipment inspection (PSI). If there is an issue with NCV8509PDW18R2, 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 NCV8509PDW18R2 part is unused and in its original packaging.
Return procedure for NCV8509PDW18R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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