Nisshinbo's 40 V / 500 mA LDO with Watchdog Timer and Reset

Tokyo, Japan, August 22^nd, 2024—Nisshinbo Micro Devices Inc., a leading innovator in electronic components, is proud to announce the launch of the NP4271 series, a cutting-edge Low-Dropout (LDO) Regulator with an integrated watchdog timer and window reset function designed to enhance the reliability and functional safety of automotive electronic control units (ECUs) and industrial equipment.

The NP4271 series is a versatile power management solution that operates within a wide voltage range of 4.0 to 40 V, making it suitable for use in demanding environments. With an output voltage accuracy of ±2.0% over a broad temperature range from -40°C to 125°C it ensures stable performance under extreme conditions. The product is available with an output voltage of 3.3V or 5.0V, catering to different system requirements.

One of the key features of the NP4271 is its robust watchdog timer (WDT) function, which contributes to overall system safety by monitoring the output pulses of a microcontroller unit (MCU) and providing a reset whenever these pulses remain absent for a certain period, indicating that the software experienced some lock-up issue. Additionally, it has an integrated window voltage detector, ensuring that any positive and negative deviations in the power supply to the MCU are promptly detected, allowing for immediate corrective actions. This single-chip solution simplifies the design of power supply systems by integrating various monitoring functions that would otherwise require multiple components.

Next to its monitoring features, it is designed with excellent transient response characteristics, outperforming comparable products even with smaller output capacitors. This makes the NP4271 particularly effective in applications where power lines experience frequent fluctuations due to the switching operation of other components. The product's ability to maintain stable output with minimal voltage deviations underscores its suitability for automotive and industrial applications where reliability is critical.

The NP4271 series is AEC-Q100 Grade 1, and with its combination of high performance, safety features, and reliability, it is an important reason to select this component in your next generation of power management systems. The product is available in a compact HSOP-8-AC package, providing an efficient and space-saving solution for design engineers. It is available for purchase now; for detailed product specifications and purchasing information, please visit our official website and refer to our list of qualified local and online distribution partners.

NP4271 Specifications:

• Wide operating voltage: 4.0 V to 40 V
• Wide operating temperature: Ta = −40°C to 125°C
• Output voltage accuracy: VO ±2.0% (Ta = −40°C to 125°C)
• Output voltage: 3.3 V, 5.0 V
• Window detection voltage

Low-side detection voltage: VDETL ±2%

High-side detection voltage: VDETH ±5%

• Output current: 500 mA
• Watchdog time-out setting by external capacitor
• Ceramic capacitor compatible
• Protection Circuits

Undervoltage lockout, Thermal shutdown, Overcurrent protection

• AEC-Q100 Grade 1
• Package NP4271AC: HSOP-8-AC
• Datasheet: Automotive version

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About Nisshinbo Micro Devices Inc.:

Established in January 2022, Nisshinbo Micro Devices Inc. is a merger of the former companies Ricoh Electronic Devices Co, Ltd., and New Japan Radio Co, Ltd, both members of the Nisshinbo Group.

The history of the two companies goes back to 1959, resulting in more than 60 years of experience in the electronics industry. Today, it is one of the leading global suppliers of advanced analogue products. Its portfolio offers a comprehensive range of ICs for Power Management, Supervisory, Operational Amplifiers, Battery Management, RF, Audio & Video, Optoelectronic devices, Motor drivers to name a few. These products enable electronics engineers to design advanced applications for consumer, industrial and automotive markets. The company is headquartered in Tokyo, Japan, and has development, sales, and manufacturing facilities across the country. In addition, it has regional sales and support offices in North America, Europe, and Asia.