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MAX20029/MAX20029B/
MAX20029C/MAX20029D
Automotive Quad/Triple Low-Voltage
Step-Down DC-DC Converters
General Description
Benefits and Features
● Quad Step-Down DC-DC Converters with Integrated
The MAX20029/MAX20029B/MAX20029C/MAX20029D
power-management ICs (PMICs) integrate four low-volt-
age, high-efficiency, step-down DC-DC converters. Each
of the four outputs is factory or resistor programmable
between 1V to 4.0V (MAX20029/MAX20029B) or 0.7V
to 3.8V (MAX20029C/MAX20029D). The MAX20029/
MAX20029C has two 0.5A/1A/1.5A channels and two
0.5A/1.5A channels, while the MAX20029B/MAX20029D
has two 0.5A/1.5A channels and by combining channels
1 and 2, a single 2A/3A channel. The PMICs operate from
3.0V to 5.5V, making them ideal for automotive point-of-
load and post-regulation applications.
FETs
● Operate from 3.0V to 5.5V Supply Voltage
● 0.7V to 4.0V Fixed or Adjustable Output Voltage
● 2.2MHz Switching Frequency
●ꢀ MAX20029/MAX20029C:ꢀUpꢀtoꢀFourꢀ1.5AꢀChannels
●ꢀ MAX20029B/MAX20029D:ꢀUpꢀtoꢀOneꢀ3Aꢀ+ꢀTwoꢀ1.5Aꢀ
Channels
● Designed to Improve Automotive EMI Performance
• Forced-PWM Operation
• Two Channels 180º Out-of-Phase
• SYNC Input
The PMICs feature fixed-frequency PWM-mode operation
with a switching frequency of 2.2MHz. High-frequency
operation allows for an all-ceramic capacitor design
and small-size external components. The low-resistance
on-chip switches ensure high efficiency at heavy loads
while minimizing critical inductances, making the layout
a much simpler task with respect to discrete solutions.
Internal current sensing and loop compensation reduce
board space and system cost.
• Spread-Spectrum Option
● Soft-Start and Supply Sequencing Reduces Inrush
Current
● Individual Enable Inputs and Power-Good Outputs to
Simplify Sequencing
● OV Input-Voltage Monitoring
● Overtemperature and Short-Circuit Protection
● 28-Pin (5mm x 5mm x 0.8mm) TQFN-EP Package
● -40ºC to +125ºC Operating Temperature Range
The PMICs offer a spread-spectrum option to reduce
radiated emissions. Two of the four buck converters
operate 180º out-of-phase with the internal clock. This
feature reduces the necessary input capacitance and
improves EMI as well. All four buck converters operate in
constant PWM mode outside the AM band. The PMICs
offer a SYNC input to synchronize to an external clock.
Ordering Information appears at end of data sheet.
The PMICs provide individual enable inputs and power-good/
reset outputs, as well as factory-programmable PG times.
The PMICs offer several important protection
features including: input overvoltage protection, input
undervoltage lockout, cycle-by-cycle current limiting, and
overtemperature shutdown.
The MAX20029/MAX20029B/MAX20029C/MAX20029D
PMICs are available in a 28-pin TQFN package with an
exposed pad and are specified for operation over the
-40ºC to +125ºC automotive temperature range.
Applications
●ꢀ Automotive
●ꢀ Industrial
19-100083; Rev 11; 2/20