MICROCHIP MIC2176-2YMM

The Micrel MIC2176-1/-2/-3 is a family of constant-frequency, synchronous buck controllers featuring a unique digitally modified adaptive ON-time control architecture. The MIC2176 family operates over an input supply range of 4.5V to 75V and can be used to supply up to 15A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a constant switching frequency of 100kHz, 200kHz, and 300kHz. Micrel’s Hyper Speed ControlTM architecture allows for ultrafast transient response while reducing the output capacitance and also makes (High Vin/Low Vout) operation possible. This digitally modified adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC2176 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, fold-back current limit, “hiccup” mode shortcircuit protection and thermal shutdown.

• Hyper Speed ControlTM architecture enables
• High delta V operation (ΔVin = 75V and Vout = 1.2V)
• Small output capacitance
• 4.5V to 75V input voltage
• Output down to 0.8V with ±1% accuracy
• Any CapacitorTM Stable
• Zero-ESR to high-ESR output capacitance
• 100kHz/200kHz/300kHz switching frequency
• Internal compensation
• 6ms Internal soft-start
• Foldback current limit and “hiccup” mode short-circuit protection
• Thermal shutdown
• Supports safe start-up into a pre-biased output
• -40°C to +125°C junction temperature range
• Available in 10-pin MSOP package

• Distributed power systems
• Networking/Telecom Infrastructure
• Printers, scanners, graphic cards and video cards