High Efficiency Single Inductor Buck-Boost Converter
The RT6154A/B is a high efficiency single inductor Buck-
Boost Converter which can operate with wide input voltage
such as battery which is higher or lower than the output
voltage and it can supply the 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 and it provides seamless
transition between Buck and Boost modes and optimal
transient response. The RT6154A/B operates at 2.4MHz
typical switching frequency in full synchronous operation.
The RT6154A/B operates in Pulse Skipped Modulation
(PSM) mode for increasing efficiency during low power
RF transmission modes. The Power Save Mode can be
disabled, forcing the RT6154A/B to operate at a fixed
switching frequency operation at 2.4MHz. The RT6154A/
B can also be synchronized with external frequency from
2.2MHz to 2.6MHz. The RT6154A output voltage is
programmable using an external resistor divider, and the
RT6154B is fixed internally to 3.3V.
Operates from a Single Li-ion Cell : 1.8V to 5.5V
Adjustable Output Voltage : 1.8V to 5.5V
3A Maximum Load Capability for VIN > 3.6V,
VOUT = 3.3V
Power Save Mode (PSM) for Improving Low Output
Fixed Frequency Operation at 2.4MHz and
Synchronization Possible from 2.2MHz to 2.6MHz
Up to 96% Efficiency
Input Current Limit
RoHS Compliant and Halogen Free
Portable Hard Disk Drives
Simplified Application Circuit
VIN VIN VOUT
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS6154A/B-03 May 2017
is a registered trademark of Richtek Technology Corporation.