EVALUATION KIT AVAILABLE
Click here for production status of specific part numbers.
MAX20075/MAX20076/
MAX25276
36V, 600mA/1.2A Mini Buck Converter
General Description
Benefits and Features
● Synchronous DC-DC Converter with Integrated FETs
The MAX20075/MAX20076/MAX25276 are small, syn-
chronous buck converters with integrated high-side
and low-side switches. The MAX20076/MAX25276 are
designed to deliver up to 1.2A and the MAX20075 up
to 0.6A, with 3.5V to 36V input voltages. The devices
provide an accurate output voltage of ±2% within the
normal operation input range of 6V to 18V. With 20ns
minimum on-time capability, the converter is capable of
large input-to-output conversion ratios. Voltage quality
can be monitored by observing the PGOOD signal. The
devices can operate in dropout by running at 99% duty
cycle, making them ideal for automotive and industrial
applications. The devices offer two fixed output voltages
of 5V and 3.3V. In addition, the devices can be configured
for 1V to 10V output voltages using an external resistor-
divider. Frequency is internally fixed at 2.1MHz, which
allows for small external components and reduced output
ripple, and guarantees no AM interference. The devices
offer pin-enabled spread-spectrum-frequency modulation
designed to minimize EMI-radiated emissions due to the
modulation frequency.
• MAX20075 = 0.6A I
• MAX20076/MAX25276 = 1.2A I
• For applications requiring low quiescent current/
skip mode operation, please refer to MAX20075D/
MAX20076D/MAX25276D. This device is only
recommended for FPWM operation
OUT
OUT
● 20ns Minimum On-Time Small Solution Size
Saves Space
• 2.1MHz Frequency
• Programmable 1V to 10V Output for the Buck, or
Fixed 5V/3.3V Options Available
• Fixed 2.5ms Internal Soft-Start
• Fixed Output Voltage with ±2% Output Accuracy
(5V/3.3V), or Externally Resistor Adjustable (1V to
10V) with ±1.5% FB Accuracy
• Innovative Current-Mode-Control Architecture
Minimizes Total Board Space and BOM Count
● PGOOD Output and High-Voltage EN Input Simplify
Power Sequencing
● Protection Features and Operating Range Ideal for
Automotive Applications
• 3.5V to 36V Operating V Range
• 40V Load-Dump Protection
• 99% Duty-Cycle Operation with Low Dropout
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
The MAX20075/MAX20076/MAX25276 are available in
small (3mm x 3mm) 12-pin TDFN and side-wettable
TDFN packages with an exposed pad, and use very few
external components.
IN
Applications
● Automotive
● Industrial
● High-Voltage DC-DC Converters
Simplified Block Diagram
SPS SYNC
REF
EN
BST
SUP
HVLDO
BANDGAP
OSC
BIAS
CLK
CURRENT SENSE
+
SLOPE COMP
SOFT-
START
Ordering Information appears at end of data sheet.
LX
LOGIC
CONTROL
BIAS
OUT
FB
PWM
EAMP
COMP
FB
PGND
SW1
VRESET
MAX20075
MAX20076
SW2
PGOOD
AGND
19-8730; Rev 10; 8/19