IC manufacturers Nisshinbo Micro Device Inc.
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Nisshinbo Micro Device Inc. NJW4175
2.1MHz, 600mA MOSFET Switching Regulator IC for Synchronous Buck Converter
Overview
| Topology | Buck Converter |
| Input voltage | 12 V |
| Switching frequency | 1900-2300 kHz |
| Output 1 | 5 V / 0.5 A |
Description
The NJW4175 is a high speed oscillating frequency buck converter with 40V/600mA MOSFET. The NJW4175 have PWM/PFM mode to ensure high efficiency at light load. Operating voltage range is wide input range from 3.4V to 40V. Moreover, 100% maximum duty cycle contribute to maintain stable output voltage even if supply voltage drops. Internal protection functions: UVLO, an over current protection and a thermal shutdown circuit can protect circuit when abnormal condition. The NJW4175 has wide coverage in consumer electronics and industrial application, because of features that are wide input range, fixed output voltage type, high switching oscillating frequency and 100% maximum duty cycle.
Features
- Programmable 3.3V, 5V or Adjustable Output
- Only 3 external components required(Fixed Output Voltage type)
- Synchronous rectification
- High oscillating frequency Fixed 2.1MHz typ.
- External clock synchronization 1.95MHz to 2.5MHz
- Efficiency improvement at light load(MODE pin selectable)
- Low quiescent current at sleep mode 20μA typ.
- Current mode control
- Wide operating voltage range 3.4V to 40V
- Switching current 0.85A min.
- PWM control
- Maximum duty cycle 100%
- Built-in compensation circuit
- Correspond to ceramic capacitor (MLCC)
- Soft start function 1ms typ.
- Under voltage lockout (UVLO)
- Overcurrent protection (Hiccup type)
- Thermal shutdown
- Power Good function
- Standby function
- Package HSOP8-M1
Typical applications
- Low power buck converter, Industrial equipment
- Power supply for camera
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC(mΩ) | fres(MHz) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LQS SMT Power Inductor, 4.7 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance4.7 µH | Rated Current1.55 A | Saturation Current1.3 A | DC Resistance91 mΩ | Self Resonant Frequency60 MHz | ||||
| WE-LQS SMT Power Inductor, 4.7 µH, 2.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance4.7 µH | Rated Current2.3 A | Saturation Current2.7 A | DC Resistance55.9 mΩ | Self Resonant Frequency57 MHz | ||||
| WE-LQS SMT Power Inductor, 4.7 µH, 2.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance4.7 µH | Rated Current2.3 A | Saturation Current1.43 A | DC Resistance46 mΩ | Self Resonant Frequency61 MHz |