NP4271 Series
40V Io=500mA LDO With Watchdog Timer and Reset
NP4271 Series
40V Io=500mA LDO With Watchdog Timer and Reset
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Description
The NP4271 is a using Bi-CMOS process, Io = 500 mA low dropout regulator with watchdog timer and reset functions. The output voltage is detected by window detection that can detect the high-side voltage and low-side voltage. The NP4271 offers outstanding high output voltage accuracy that guaranteed ±2% under the conditions of VIN = VO+ 1V to 40 V, IO = 5 mA to 500 mA, and Ta = −40°C to 125°C. This feature makes the device well suited as automotive ECUs and industrial applications.
Applications
- Automotive ECUs
- Industrial equipment
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Spec
Automotive Input Voltage Range 4.0 V to 40 V (45 V) Operating Temperature Range -40°C to 125°C(150°C) Supply Current Typ. 120 µA Standby Current Max. 1.0 µA(@ta=25℃) Output Voltage Accuracy Typ. ±1 % Output Current Min. 500 mA Ripple Rejection Typ. 68 dB Package HSOP-8-AC Function ON/OFF control
Watchdog time setting by external capacitorNote Ceramic capacitor compatible
Undervoltage lockout
Thermal shutdown
Overcurrent protectionAEC-Q100 AEC-Q100 Grade 1 Protections / Functions
TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver PGOOD 
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Technical
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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 |
|---|---|
| Reverse Current Protection | Reverse Current Protection |
| Current Limit | Overcurrent Protection |
| ISC | Short Current Protection |
| Inrush Current Limit | Inrush Current Protection |
| Constant Slope | Constant Slope Function |
| ECO mode | ECO Function |
| Auto Discharge | Auto Discharge Function |
| External Driver | External Output Driver Transistor |