NJW4177 Series
Internal 2A MOSFET Switching Regulator IC for Synchronous Buck Converter
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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
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Spec
Consumer 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 FunctionNote 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 -
Technical
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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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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 |
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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 |