New Yorker Electronics has recently updated its line of power ICs with the new Vishay Siliconix SiC462 4.5 V to 60 V synchronous microbuck regulator. Named a Vishay Super 12 Featured Product for 2017, the SiC462 is a synchronous buck regulator with integrated high-side and low-side power MOSFETs. The company said it is a high-efficiency buck regulator with a power state capable of supplying a continuous current of 6 A at a switching frequency of up to 1 MHz.
This regulator produces an adjustable output voltage down to 0.8 V from 4.5 V to 60 V input rail to accommodate a variety of applications, including computing, consumer electronics, telecom and industrial.
The device has a programmable switching frequency of 100 kHz to 2 MHz. According to New Yorker Electronics, its control scheme is based on voltage mode constant-on time, so it delivers ultra-fast transient response with minimum output capacitance and tight ripple regulation at a very light load.
The SiC462 is stable with any capacitor and its power saving scheme increases light load efficiency by enabling diode emulation mode and frequency fold-back as the load decreases. It also enables loop stability — regardless of the type of output capacitor used, including low-ESR ceramic capacitors, therefore no external ESR network is required for loop stability.
SiC462 has a full set of protection and monitoring features, including output overvoltage protection (OVP) by pulse mode, output undervoltage protection (UVP) with device latch and thermal shutdown (OTP) with hysteresis. It also has an undervoltage lockout (UVLO) for input rail and a user programmable soft start as well as a dedicated enable pin for easy power sequencing and a power-good open-drain output.
The SiC462 is available in lead-free power-enhanced MLP55-27L package to deliver high power density and minimize PCB area.
Features and Benefits:
- Adjustable switching frequency from 100 kHz to 2 MHz
- 95% peak efficiency
- Less than 10 μA shut-down current
- Stable with any output capacitor
- Low quiescent current — 250 μA, low shut-down current
- Protection and monitoring: OVP, OCP, UVP, OTP, UVLO
- Operating ambient temperature: -40° C to 105° C
- Single supply operation from 4.5 V to 60 V input voltage
- Ultra-fast transient response
- Scalable family of output current: 3 A (SiC463), 6 A (SiC462), 10 A (SiC461)
Applications:
- Point-of-load power supplies in telecom servers
- Base station power supplies
- Wall transformer regulation
- Robotics
- Drones
- Battery management systems
- Power tools
- Vending machines, ATMs and slot machines
- Industrial and automation
- Industrial computing
- Consumer electronics
