My Inquiry
My Account
onsemi NCV8925SNT1G
- Part No.:
- NCV8925SNT1G
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCV8925SNT1G.pdf
- Description:
- IC REG LIN SWITCHING REG/CNTRLR
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCV8925SNT1G from onsemi is a 3 MHz, 600 mA synchronous step-down DC-DC converter in TSOP-5 package, delivering adjustable output voltage from 0.9 V to 3.3 V via external resistor divider. It integrates soft-start, cycle-by-cycle current limiting, thermal shutdown, and operates across 2.7 V–5.5 V input range. Designed for automotive power rails, it supplies core voltage to microcontrollers in engine control units.
For engineers reviewing the NCV8925SNT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3 MHz switching frequency enabling compact filter design, ±3% output voltage accuracy over temperature, 0.3 µA shutdown current, integrated PFM/PWM mode transition, and automotive-grade thermal shutdown at 160°C with 25°C hysteresis.
Technical Context
The NCV8925SNT1G implements a constant-frequency voltage-mode buck architecture with internal P-channel high-side and N-channel low-side MOSFETs (RDS(ON) = 400 mΩ each). Its feedback loop uses a fixed 0.6 V reference and requires external R1/R2 divider for output setting.
It dynamically switches between PWM (fixed 3 MHz) and PFM (variable frequency) modes based on load: PWM ensures tight regulation (<3% error) and >90% efficiency at ≥100 mA; PFM reduces quiescent current to 50 µA typical at light loads, extending battery life in always-on automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz (typ); enables use of small 2.2 µH inductor and 4.7 µF ceramic capacitors, reducing board area by >40% vs. 500 kHz converters |
| Output Current | 600 mA (max continuous); supports single-core MCU or sensor cluster power without external boost stages |
| Input Voltage Range | 2.7 V to 5.5 V; compatible with automotive 3.3 V/5 V rails and cold-crank down to 2.7 V |
| Output Voltage Range | 0.9 V to 3.3 V (adjustable); covers DDR termination, ARM Cortex-A/M cores, and I/O domain requirements |
| Efficiency | Up to 93% (typ at 300 mA); achieved via synchronous rectification eliminating Schottky diode loss |
| Shutdown Current | 0.3 µA (typ); meets automotive "off-mode" leakage budgets for body control modules |
| Thermal Shutdown | 160°C activation / 135°C recovery; protects against sustained overload in enclosed junction boxes |
| Feedback Reference | 0.6 V (fixed); simplifies output setting with standard 1% resistors and minimizes divider current to 3 µA at R2 = 200 kΩ |
Pinout & Package
NCV8925SNT1G uses the TSOP-5 surface-mount package (3.0 × 1.5 mm, 0.95 mm height), optimized for high-density automotive PCBs with exposed pad thermal relief. Pin 1 is EN, Pin 2 is GND, Pin 3 is VIN, Pin 4 is FB, Pin 5 is LX - matching JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Digital enable input | Active-HIGH logic; <0.4 V disables IC, drawing only 0.3 µA; >1.2 V enables soft-start sequence |
| 2 - GND | Analog & power ground | Common return for feedback, control logic, and power stage; must connect to low-impedance system ground plane |
| 3 - VIN | Power input | Supplies all internal blocks; requires 4.7 µF ceramic decoupling capacitor placed within 2 mm of pin |
| 4 - FB | Analog feedback input | Senses divided output voltage; internal 0.6 V reference sets VOUT = 0.6 × (1 + R1/R2); noise-sensitive-route away from LX |
| 5 - LX | Switch node output | Connects to inductor; carries high di/dt pulses; requires short, wide trace and ground guard ring to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and improving full-load efficiency by 8–10% |
| PFM/PWM auto-mode transition | Maintains >85% efficiency down to 1 mA load while keeping output ripple <8 mV in PFM mode |
| Integrated soft-start | 320–500 µs ramp time prevents inrush current spikes during ignition-on sequencing |
| Cycle-by-cycle current limit | 1200 mA (typ) peak switch current limit protects against short-circuit faults without latch-up |
| Automotive thermal protection | 160°C shutdown with 25°C hysteresis ensures reliable operation in under-hood environments up to 125°C ambient |
| Pb-free TSOP-5 package | RoHS-compliant, AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with MSL1 moisture rating |
Applications
| Engine Control Unit (ECU) Core Supply | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers 32-bit ARM Cortex-M7 MCU core in gasoline/diesel ECU requiring stable 1.2 V @ 500 mA during transient crank conditions. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5 V pre-regulator rail to MCU core voltage; handles 2.7 V cold-crank dips with UVLO hysteresis. Use Value: 3 MHz switching avoids AM-band interference; 0.3 µA shutdown current enables "keep-alive" memory retention during vehicle sleep mode. | Use Scenario: Supplies 1.8 V to image signal processor (ISP) and 3.3 V to MIPI CSI-2 serializer in rear-view camera module. IC Role / Device Role / Timing Role: Dual-output capable via two NCV8925SNT1G instances; regulates ISP core and I/O domains independently with fast load transient response. Use Value: 50 mV load transient deviation (100 mA → 10 mA step) ensures clean video clocking; PFM mode extends battery backup runtime during parking surveillance. |
| Body Control Module (BCM) Subsystem | Automotive Infotainment Display Backlight |
Use Scenario: Generates 3.3 V for CAN transceiver, LIN interface, and EEPROM in door module operating across −40°C to +105°C. IC Role / Device Role / Timing Role: Always-on LDO replacement; delivers regulated 3.3 V from variable 6–16 V battery via intermediate 5 V rail. Use Value: 93% peak efficiency reduces thermal load in sealed plastic housing; AEC-Q100 qualification ensures 15-year field reliability. | Use Scenario: Provides 5 V bias to LED driver IC powering 4-segment LCD backlight in center console display. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12 V battery to 5 V; interfaces with PWM dimming controller via EN pin. Use Value: 320–500 µs soft-start eliminates backlight flash during display wake-up; thermal shutdown prevents LED driver thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 2.25 MHz switching, 600 mA, 2.05–6.5 V input; no PFM mode; 1.5% FB accuracy vs. NCV8925SNT1G's 3% | Requires external soft-start capacitor; lacks automotive temp grade (only –40°C to 85°C) | Preferred for industrial non-automotive designs needing tighter FB tolerance and higher input voltage margin |
| MP2143GJ-Z | 3 MHz, 600 mA, 2.5–5.5 V input; integrated compensation; 1.2% FB accuracy; no thermal hysteresis spec | Smaller 2 mm × 2 mm QFN-8 package; no AEC-Q100 qualification; lower max junction temp (125°C) | Used where board space is critical and automotive qualification is not required |
Compared with TPS62231DRVR and MP2143GJ-Z, the NCV8925SNT1G uniquely combines AEC-Q100 Grade 1 qualification, 160°C thermal shutdown with hysteresis, and true PFM mode for sub-100 µA quiescent current-making it the only choice for automotive always-on subsystems requiring extended battery life and under-hood reliability.
Availability
NCV8925SNT1G is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and infotainment displays requiring stable component supply across automotive production lifecycles.
Supply support for NCV8925SNT1G 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8925SNT1G belongs to onsemi's automotive-qualified DC-DC converter portfolio, engineered specifically to replace linear regulators in harsh-environment vehicle subsystems while meeting stringent AEC-Q100, ISO 26262 functional safety readiness, and EMC emission targets.
FAQ
What is the minimum input voltage required for NCV8925SNT1G to start regulation?
The NCV8925SNT1G features undervoltage lockout (UVLO) with a typical turn-on threshold of 2.4 V and hysteresis of 100 mV. Regulation begins only when VIN rises above 2.4 V; below 2.3 V, the device remains in shutdown, drawing just 0.3 µA. This ensures reliable startup after automotive cold-crank events where battery voltage dips to 2.7 V.
Can NCV8925SNT1G operate in 100% duty cycle mode?
Yes, the NCV8925SNT1G supports low-dropout operation via 100% duty cycle mode. When VIN approaches VOUT, the internal P-channel MOSFET remains fully enhanced, minimizing dropout voltage. The minimum input voltage to sustain regulation is calculated as VOUT + IOUT × (RDS(ON) + RINDUCTOR), enabling use in post-regulator applications where input margin is tight.
What is the recommended output capacitor for NCV8925SNT1G in PWM mode?
The NCV8925SNT1G is optimized for a 4.7 µF X7R ceramic output capacitor (e.g., Murata GCM31CR71C475) in conjunction with a 2.2 µH inductor. This combination yields <1 mVPP output ripple at 300 mA load in PWM mode and ensures loop stability with the device's fixed internal compensation network.
Does NCV8925SNT1G require an external feed-forward capacitor?
Yes, a feed-forward capacitor (CFF) is mandatory for stable operation. The NCV8925SNT1G datasheet specifies a minimum 18 pF ceramic capacitor (X7R dielectric) from FB to GND. This capacitor sets zero location in the feedback loop, compensating for phase lag introduced by the LC filter and ensuring >45° phase margin across temperature and load.
How does NCV8925SNT1G handle short-circuit conditions on its output?
Under output short-circuit, the NCV8925SNT1G limits peak inductor current to 1200 mA (cycle-by-cycle) and reduces duty cycle to minimum. Input current clamps to ~300 mA (typ), preventing thermal runaway. Once the fault clears, the device automatically resumes normal operation via soft-start-no manual reset or power cycle is needed.
NCV8925SNT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCV8925SNT1G FAQ
1.How can I place an order for NCV8925SNT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8925SNT1G 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 NCV8925SNT1G reliable?
The price and inventory of NCV8925SNT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8925SNT1G is usually 5 days.
3.What payment methods are accepted for NCV8925SNT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8925SNT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8925SNT1G?
NCV8925SNT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8925SNT1G 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 NCV8925SNT1G?
For technical support, including NCV8925SNT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8925SNT1G requirements.
6.How does Aetrix verify that NCV8925SNT1G is sourced from the original manufacturer or authorized distributors?
All NCV8925SNT1G 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 NCV8925SNT1G meets industry standards.
7.What is the process for return or replacement of NCV8925SNT1G?
All NCV8925SNT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8925SNT1G, 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 NCV8925SNT1G part is unused and in its original packaging.
Return procedure for NCV8925SNT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCV8925SNT1G Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
