The MIC28510 is an adjustable frequency, synchronous buck regulator featuring unique adaptive on-time control architecture. The MIC28510 operates over an input supply range of 4.5V to 75V and provides a regulated output of up to 4A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%.

Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High V_IN) / (Low V_OUT) operation possible. This adaptive t_ON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device.

The MIC28510 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.

• Hyper Speed Control™ architecture enables
• High delta V operation (V_IN = 75V and V_OUT = 0.8V)
• Small output capacitance
• 4.5V to 75V voltage input
• 4A output current capability, up to 95% efficiency
• Adjustable output voltage form 0.8V to 24V
• ≤1% FB accuracy
• Any Capacitor™ stable
• Zero-ESR to high ESR output capacitors
• 100kHz to 500kHz switching frequency
• Internal compensation
• Foldback current limit and "hiccup" mode short-circuit protection
• Thermal shutdown
• Supports safe startup into a pre-biased load
• -40°C to +125°C junction temperature range