RAA211820GSP#HA0

RAA211820GSP#HA0 is a 4.5V to 75V, 2A DC/DC synchronous step-down regulator w/ internal compensation and adjustable frequency. It uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation and DEM to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost. It provides useful functions such as internal or programmable soft-start and power good indicator. Application includes industrial power systems, distributed power supplies and general-purpose point-of-load, telecommunication base station power supplies, high-voltage single-board systems.

• Wide input voltage range from 4.5V to 75V (TA = +25°C, VIN = 24V)
• Adjustable output voltage range from 0.8V to 90% of VIN
• Default 400KHz switching frequency and programmable switching frequency range from 200KHz to 800KHz
• ±1% load regulation accuracy from -40 to 125°C, ±0.5% Load regulation accuracy at 25°C
• 95µA typical quiescent current, internal compensation
• External programmable soft-start (HTSSOP), PFM operation and DEM at light load
• Integrated external bias LDO, power good indicator
• Cycle-by-cycle peak and valley current limit, thermal shutdown
• Input voltage UVLO and output voltage undervoltage (short-circuit) protection
• 16 lead HTSSOP package, junction temperature range from -40°C to +125°C