RT6154AGQW [RICHTEK]

The RT6154A/B is a high efficiency single inductor buck-boost converter that can operate with a wide input voltage range, such as a battery. It allows for input voltages higher or lower than the output voltage and can supply a load current up to 4A. The maximum peak current in the switches is limited to a typical value of 5A at VIN = 3.6V and 2.6A at VIN = 2.1V. The RT6154A/B feedback loop is internally compensated for both buck and boost operation, providing seamless transition between buck and boost modes and optimal transient response. The RT6154A/B operates at a typical switching frequency of 2.4MHz in full synchronous operation. The RT6154A/B operates in pulse skipped modulation, enhancing efficiency during low power RF transmission modes. The Power Save Mode (PSM) can be disabled, forcing the RT6154A/B to operate at a fixed switching frequency of 2.4MHz. The RT6154A/B can also be synchronized with an external frequency source ranging from 2.2MHz to 2.6MHz. The RT6154A output voltage is adjustable using an external resistor divider, while the RT6154B is fixed internally to 3.3V.