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onsemi NCV8505D2T25G
- Part No.:
- NCV8505D2T25G
- Manufacturer:
- onsemi
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
NCV8505D2T25G.pdf
- Description:
- IC REG LINEAR 2.5V 400MA D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,150
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Product details
Overview
NCV8505D2T25G from onsemi is a 2.5 V fixed-output, 400 mA automotive-grade LDO linear regulator with ENABLE, active RESET (operational down to VOUT = 1.0 V), and programmable delay timing. It features ±2.0% output accuracy, 0.6 V max dropout at full load, <1.0 µA sleep current, and AEC-Q100 qualification for engine control units and body electronics.
For engineers reviewing the NCV8505D2T25G datasheet, pinout, applications, or equivalent options, key selection criteria include its 45 V absolute maximum input voltage, −15 V reverse battery tolerance, 60 V load dump survivability, and D2PAK-7 thermal performance in high-reliability automotive power rails.
Technical Context
The NCV8505D2T25G integrates a precision bandgap reference (1.8 V for fixed versions), error amplifier, current-limit protection, thermal shutdown (150 °C trip), and independent RESET detection circuitry functional even when VOUT drops to 1.0 V. Its ENABLE pin supports direct battery-line connection with internal pull-down and 60 V transient tolerance.
RESET activation uses hysteresis (25 mV typical) with threshold tracking 94% of nominal output (2.35 V HIGH / 2.30 V LOW), while DELAY timing is set by external capacitor charge current (4.0 µA typical) and switching thresholds (1.4–2.2 V). The device operates across −40 °C to +150 °C junction temperature with RJA of 10–50 °C/W depending on PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% - ensures stable MCU core supply under battery voltage sag and temperature drift. |
| Max Output Current | 400 mA - supports mid-power microcontrollers, CAN transceivers, and sensor signal chains without external pass devices. |
| Dropout Voltage | 600 mV max at 400 mA - enables operation down to VIN = 3.1 V while maintaining regulation, critical for cold-crank scenarios. |
| Quiescent Current | 200 µA active / <1.0 µA sleep - extends battery life in always-on vehicle modules such as telematics and alarm systems. |
| RESET Threshold | 2.30 V (LOW) / 2.35 V (HIGH) with 25 mV hysteresis - provides clean, bounce-free reset assertion during brown-out recovery. |
| Input Voltage Range | −15 V to +45 V DC - withstands reverse battery connection and 60 V load dump transients per ISO 7637-2. |
| Junction Temp Range | −40 °C to +150 °C - validated for under-hood placement in engine management and transmission control units. |
Pinout & Package
D2PAK-7 (Case 936AB) package with exposed thermal pad (Tab = GND); optimized for high-power dissipation in automotive PCBs using copper pour and thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. DELAY | Reset timing capacitor node | Sources 4.0 µA to external capacitor; sets RESET assertion delay time (e.g., 33 nF → ~14 ms). |
| 2. ENABLE | Active-high enable control | Pulls up internally; accepts 0–10 V logic; survives 60 V transients when tied to battery via resistor. |
| 3. RESET | Open-collector reset output | Drives low when VOUT < 2.30 V; valid down to VOUT = 1.0 V; requires external pull-up for MCU interface. |
| 4. GND | Power and signal ground | All four GND leads (including thermal tab) must be connected to low-impedance ground plane for thermal and noise integrity. |
| 5. SENSE | Remote output voltage sensing | Kelvin connection improves load regulation; short to VOUT if remote sensing not required. |
| 6. VOUT | Regulated 2.5 V output | Delivers up to 400 mA with ±2.0% accuracy; requires ≥33 µF aluminum electrolytic capacitor for stability. |
| 7. VIN | Main input supply | Accepts −15 V to +45 V; includes reverse-battery, short-circuit, and thermal protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive use from −40 °C to +125 °C ambient (150 °C junction), with PPAP documentation support. |
| Integrated RESET with delay | Independent monitoring circuit asserts RESET before VOUT reaches regulation and holds it until stable, eliminating external supervisor ICs. |
| Reverse battery protection | Withstands −15 V applied to VIN without damage or latch-up - eliminates need for external series diode in battery-fed systems. |
| Load dump immunity | Survives 60 V/46 V transients per ISO 7637-2 Pulse 5a without derating - enables direct connection to vehicle battery rail. |
| Low-EMI design | Optimized internal layout and ESD structure meet CISPR 25 Class 5 radiated emissions requirements for infotainment and ADAS subsystems. |
Applications
| Engine Control Unit (ECU) Power | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers 32-bit MCU, CAN FD transceiver, and analog front-end in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 2.5 V domain regulator with RESET supervision and cold-crank support. Use Value: Maintains regulation down to VIN = 3.1 V during cranking; RESET prevents MCU lockup during battery sag below 6 V. |
Use Scenario: Supplies door module microcontroller, LIN transceiver, and window motor driver logic. IC Role / Device Role / Timing Role: Always-on LDO with ultra-low sleep current and wake-on-ENABLE capability. Use Value: Draws <1.0 µA in sleep mode to extend 12 V battery life over months of vehicle dormancy. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
|
Use Scenario: Provides clean 2.5 V bias to radar sensor ADCs and image signal processors in forward-facing camera modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO with thermal shutdown and transient immunity. Use Value: Rejects high-frequency noise from switching converters; survives 60 V load dump without system reset. |
Use Scenario: Powers LTE modem baseband processor and GNSS receiver in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Fault-tolerant regulator with ENABLE-controlled power sequencing and RESET coordination. Use Value: Enables controlled boot sequence via ENABLE; RESET synchronizes modem firmware initialization after power stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73325PDBVR | 2.5 V, 300 mA, 250 mV dropout, no RESET/DELAY, SOT-23-5 package | Lacks integrated RESET, delay, and automotive qualification; limited to non-safety-critical consumer/industrial use | Select only for cost-sensitive, space-constrained designs where fault supervision and AEC-Q100 are not required. |
| TPS7B6725QPWPRQ1 | 2.5 V, 400 mA, 450 mV dropout, integrated RESET, SO PowerPAD-8 package | Higher quiescent current (25 µA active), no reverse battery rating, lower transient immunity (45 V) | Prefer when board space is constrained and thermal performance via PowerPAD suffices, but verify load dump margin. |
Compared with TLV73325PDBVR and TPS7B6725QPWPRQ1, the NCV8505D2T25G uniquely combines AEC-Q100 Grade 1, −15 V reverse battery tolerance, and 60 V load dump immunity in a single D2PAK-7 package - making it the only option qualified for direct battery connection in safety-critical power domains.
Availability
NCV8505D2T25G is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS sensors, and telematics control units requiring stable component supply across extended automotive lifecycles.
Supply support for NCV8505D2T25G 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 NCV8505 series belongs to onsemi's automotive power management portfolio, designed specifically for robust, fault-tolerant voltage regulation in harsh-temperature, high-transient environments like engine compartments and chassis electronics.
FAQ
What is the minimum input voltage required for NCV8505D2T25G to regulate at full 400 mA output?
The NCV8505D2T25G requires a minimum input voltage of 4.5 V to maintain 2.5 V regulation at 400 mA load, based on its 0.6 V max dropout specification. Below this, output voltage collapses linearly with VIN. This threshold is verified across −40 °C to +150 °C junction temperature per the datasheet's Electrical Characteristics table.
How does the RESET function of NCV8505D2T25G behave during cold-crank conditions?
During cold-crank, when battery voltage dips below 6 V, the NCV8505D2T25G continues asserting RESET until VOUT rises above 2.35 V and remains stable. Its RESET circuit remains functional down to VOUT = 1.0 V, ensuring reliable microcontroller reset even during deep brown-out events common in 12 V automotive systems.
Can NCV8505D2T25G be used without the SENSE pin connection?
Yes - the SENSE pin on NCV8505D2T25G is optional. When remote sensing is unnecessary, it must be shorted directly to VOUT. Leaving SENSE floating will cause regulation failure. This Kelvin connection improves load regulation accuracy by compensating for PCB trace resistance between the regulator and load.
What output capacitor is recommended for stable operation of NCV8505D2T25G?
onsemi specifies a minimum 33 µF aluminum electrolytic capacitor at the VOUT pin for stability. Ceramic or film capacitors with near-zero ESR are discouraged, as they can induce oscillation. The capacitor must be rated for operation at the system's minimum ambient temperature (e.g., −40 °C) and placed within 5 mm of the VOUT and GND pins.
Is NCV8505D2T25G pin-compatible with other members of the NCV8505 family?
Yes - all NCV8505 variants (2.5 V, 3.3 V, 5.0 V, adjustable) share identical D2PAK-7 pinout and footprint. The NCV8505D2T25G uses the fixed-output pin configuration (SENSE on Pin 5), and swapping to another fixed-voltage variant requires only a BOM change - no PCB redesign is needed.
NCV8505D2T25G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 350 µA
- Current - Supply (Max):
- 45 mA
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-7
NCV8505D2T25G FAQ
1.How can I place an order for NCV8505D2T25G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8505D2T25G 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 NCV8505D2T25G reliable?
The price and inventory of NCV8505D2T25G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8505D2T25G is usually 5 days.
3.What payment methods are accepted for NCV8505D2T25G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8505D2T25G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8505D2T25G?
NCV8505D2T25G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8505D2T25G 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 NCV8505D2T25G?
For technical support, including NCV8505D2T25G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8505D2T25G requirements.
6.How does Aetrix verify that NCV8505D2T25G is sourced from the original manufacturer or authorized distributors?
All NCV8505D2T25G 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 NCV8505D2T25G meets industry standards.
7.What is the process for return or replacement of NCV8505D2T25G?
All NCV8505D2T25G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8505D2T25G, 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 NCV8505D2T25G part is unused and in its original packaging.
Return procedure for NCV8505D2T25G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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