Renesas' RAA210030 and RAA210040 power modules are compact, single-channel, synchronous step-down, non-isolated complete power supplies capable of delivering up to 3 A and 4 A continuous current, respectively. By operating from a single 2.7 V to 5.5 V input power rail and integrating the controller, gate driver, power inductor, and MOSFETs, the RAA210030 and RAA210040 are optimized for space-constrained applications.

Based on a peak current mode control scheme, the RAA210030 and RAA210040 provide a fast transient response and excellent loop stability. The output voltage can be set as low as 0.6 V, with setpoint accuracy better than ±1.5% over line, load, and temperature. The operating frequency has a 2 MHz default setting; however, it can also be set from 500 kHz to 4 MHz by an external resistor. The external synchronization is also supported with an external clock signal up to 4 MHz. The RAA210030 and RAA210040 support 100% duty cycle operation to minimize switching losses with typically 300 mV dropout voltage. A dedicated enable pin and a power good flag allow for easy system power rails sequencing.

The RAA210030 and RAA210040 can be configured for pulsed frequency modulation (PFM) or forced pulse width modulation (FPWM) at light load. FPWM reduces noise and RF interference, while PFM provides higher efficiency by reducing switching losses at light loads.