Buck-Boost Switching Regulator IC Positive Adjustable (Fixed) 6.5V (11.5V) 1 Output 6A 22-PowerWFQFN
The MAX25239/MAX25240 are small, synchronous,
buck-boost converters with integrated H-bridge
switches. These ICs provide a fixed-output regulation
voltage and an externally adjustable output voltage in
the 3V to 20V range with an input voltage above, below,
or equal to the output regulation voltage. The ICs have
typical 8.2A and 10A input current limit options and can
support continuous load currents up to 6A depending on
the input-to-output voltage ratio and operating
frequency. It also has a wide input voltage range of 2V
to 36V.
The MAX25239/MAX25240 have three switching
frequency options: 2.1MHz, 400kHz, and 200kHz. The
2.1MHz high switching frequency allows small external
components and reduced output ripple, and guarantees
no AM band interference, while the 400kHz or 200kHz
switching frequency offers better efficiency and relieves
the power consumption concern. The SYNC input allows
three operation modes: skip mode with ultra-low
quiescent current, forced fixed-frequency PWM
operation, and synchronization to an external clock. The
IC also includes spread-spectrum frequency modulation
to minimize EMI interference.
The MAX25239/MAX25240 feature a power-OK (POK)
indicator, undervoltage lockout, overvoltage protection,
cycle-by-cycle current limit, and thermal shutdown. The
ICs are available in small, 4.25mm x 4.25mm x 0.75mm,
22-pin FC2QFN and 5.00mm x 5.00mm x 0.75mm, 18-
pin FCQFN packages.
Key Features
Wide 2 V to 36 V input voltage range
Synchronous buck-boost topology for seamless step-up and step-down conversion
Delivers up to 6 A continuous output current
Adjustable output voltage from 3 V to 20 V (device variant includes fixed output configuration options)
High conversion efficiency with integrated low-RDS(ON) MOSFETs
400 kHz switching frequency with spread-spectrum option for reduced EMI
Very low 95 µA quiescent current in standby and 10 µA shutdown current
Integrated protection features including overvoltage, short-circuit, thermal shutdown, and undervoltage lockout (UVLO)
Power-Good (PGOOD) output for power monitoring
AEC-Q100 qualified for automotive applications
Operating junction temperature range: −40°C to +150°C
Compact 22-pin FC2QFN (4.25 × 4.25 mm) package