NJW4177 Series
Internal 2A MOSFET Switching Regulator IC for Synchronous Buck Converter
Description
The NJW4177 is a synchronous buck converter with 40V/2A MOSFET. It can support the application of the high efficiency by synchronous rectification. The NJW4177 can select PFM mode to ensure high efficiency in the light load. 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 built-in phase compensation circuit and internally fixed soft start function minimize external parts. Also, current mode control contributes to using a small low ESR Output Capacitor(MLCC).Therefore, the NJW4177 can realize downsizing of applications. It is suitable for power supply circuit of microprocessor, DSP and so on that need fast transient response.
Applications
- Power supply for Automotive
- Infotainment
- Industrial Equipment
Spec
| Standard | |
|---|---|
| Input Voltage Range | 3.6 V to 40 V (45 V) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Current | Typ. 2800 µA |
| Standby Current | 5 (max.) µA |
| Output Voltage Range | 0.8 V to 38 V |
| Output Voltage Accuracy | ± 1 % |
| Output Current | 2000 mA |
| Oscillator Frequency | 450kHz typ. (A ver.) 300kHz typ. (B ver.) |
| Maximum Duty Cycle | 100% |
| Package | HSOP8-M1 |
| Control | Current Mode Control / PWM Control |
| Function | Standby Function Soft Start Function 4ms typ. Over Current Protection (Hiccup type) Thermal Shutdown Protection Power Good Function |
| Note | Built-in Compensation Circuit UVLO (Under Voltage Lockout) Correspond to Ceramic Capacitor (MLCC) |
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 |
|---|---|
| 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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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