NJW4171 Series
2.4MHz, 2.5A MOSFET Switching Regulator IC for Buck Converter
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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.
* Automotive: AEC-Q100 grade 1 in progress
Applications
- Consumer Electronics
- Industrial Equipment
- High voltage to logic and microprocessor power supplies
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Spec
Consumer 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 FunctionNote UVLO (Under Voltage Lockout)
External Compensation Circuit
Correspond to Ceramic Capacitor (MLCC)If you need datasheets of this
product, please contact us.AEC-Q100 AEC-Q100 grade 1 in progress 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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Technical
Documents-
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
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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.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
Functional Description
| TSD | Thermal Shutdown Function |
|---|---|
| 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 |