MIC24051YJL-TR

A constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. Operates over an input supply range of 4.5V to 19V and provides a regulated output of up to 6A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz. Hyper Speed Control® architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. Offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, foldback current limit, “hiccup mode” short-circuit protection and thermal shutdown. An open-drain Power Good (PG) pin is provided.

Applications

• Servers and Workstations
• Routers, Switches, and Telecom Equipment
• Base Stations

Key features

• Hyper Speed Control® Architecture Enables:
• High Delta V Operation (VIN = 19V and VOUT = 0.8V)
• Small Output Capacitance
• 4.5V to 19V Voltage Input
• 6A Output Current Capability, up to 95% Efficiency
• Adjustable Output from 0.8V to 5.5V
• ±1% Feedback Accuracy
• Any Capacitor Stable - Zero-to-High ESR
• 600kHz Switching Frequency
• No External Compensation
• Power Good (PG) Output
• Foldback Current-Limit and “Hiccup Mode” Short-Circuit Protection
• Supports Safe Start-Up into a Pre-Biased Load
• -40°C to +125°C Junction Temperature Range
• Available in a 28-pin 5mm×6mm QFN Package