NJW4171 Series
2.4MHz, 2.5A MOSFET Switching Regulator IC for Buck Converter
Description
The NJW4171 is a high speed oscillating frequency buck converter with 40V/2.5A MOSFET. It has two lineup: the A version has PWM/PFM mode to ensure high efficiency at light load, the B version is forced PWM mode. Operating voltage range is wide input range from 3.4V to 40V, it can correspond to supply voltage drop such as cold crank. Moreover, 100% maximum duty cycle contribute to maintain stable output voltage even if supply voltage drops. The NJW4171 has wide switching oscillating frequency range, 100kHz to 2.4MHz and internal external clock synchronization function. Therefore the NJW4171 can avoid interference with the AM radio frequency. Internal protection functions: UVLO, an over current protection and a thermal shutdown circuit can protect circuit when abnormal condition. The NJW4171 has wide coverage in consumer electronics and industrial application, because of features that are wide input range, wide switching oscillating frequency range and 100% maximum duty cycle.
Applications
- Consumer Electronics
- Industrial Equipment
- High voltage to logic and microprocessor power supplies
Spec
| Standard | Automotive | |
|---|---|---|
| Input Voltage Range | 3.4 V to 40 V (45 V) | |
| Operating Temperature Range | -40°C to 125°C | |
| Supply Current | Typ. 120 µA | Max. 165 µA |
| Standby Current | 3 (max.) µA | 4 (max.) µA |
| Output Voltage Range | 0.8 V to 38 V | |
| Output Voltage Accuracy | ± 1 % | ± 2 % |
| Output Current | 2500 mA | |
| Oscillator Frequency | High 100kHz to 2.4MHz | |
| Maximum Duty Cycle | 100% | |
| Package | HSOP8-M1 | |
| Control | Current Mode Control / PWM Control | |
| Function | Standby Function Soft Start Function (2ms typ.) Over Current Protection (Hiccup type) Thermal Shutdown Protection Power Good Function |
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| Note | UVLO (Under Voltage Lockout) External Compensation Circuit Correspond to Ceramic Capacitor (MLCC) |
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Protections / Functions
| TSD | ILX | OCP | OVP | UVLO | OVLO | Reverse | Shutdown | Soft Start | SSCG | PGOOD | Auto Discharge | Anti-ringing | Sequencing | Max Duty | Ext. Phase | LED Adjust |
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Functional Description
| TSD | Thermal Shutdown Function |
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| ILX | LX Current Limit Function |
| OCP | Overcurrent Protection |
| OVP | Overvoltage Protection |
| UVLO | Undervoltage Lockout Protection |
| OVLO | Overvoltage Lockout Protection |
| Reverse | Reverse Current Protection Circuit |
| Shutdown | Shutdown Function |
| Soft Start | Soft Start Function |
| SSCG | Spread Spectrum Clock Generator Function |
| PGOOD | Power Good Output |
| Auto Discharge | Auto Discharge Function |
| Anti-ringing | Anti-ringing Switch Function |
| Sequencing | Start-up Sequencing Control |
| Max Duty | Maximum Duty Cycle |
| Ext. Phase | Externally Adjustable Phase Compensation |
| LED Adjust | LED High-speed Dimming Control |
Technical Documents
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SPICE model download
You can download the product's SPICE model. Login/registration to myNISD is required to download.
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Related Links
Quality & Packages
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
FAQ
Buy / Contact
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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Technical Support