RAA211450GNP#HA0

RAA211450GNP#HA0 is a 4.5V to 42V, 5A DC/DC synchronous step-down regulator w/ internal compensation and adjustable frequency. It can deliver up to continuous 5A of continuous output current with premium load and line regulation performance. This uses peak-current mode control architecture. With a programmable PWM switching frequency, it provides the best trade off between transient response and efficiency. The device supports PFM operation and DEM to maximize light load efficiency as well as an external bias LDO input to further reduce power dissipation across the load range. The regulator 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 a 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 30V (TA = +25°C, VIN = 24V)
• Adjustable output voltage range from 0.8V to 90% of VIN (limited by minimum off time)
• 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
• Internal 0.5ms soft-start, 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
• QFN package, junction temperature range from -40°C to +125°C