MAX16930/MAX16931
2MHz, 36V, Dual Buck with Preboost and
20µA Quiescent Current
General Description
Benefits and Features
● Meets Stringent OEM Module Power Consumption
The MAX16930/MAX16931 offer two high-voltage,
synchronous step-down controllers and a step-up
preboost controller. They operate with an input voltage
supply from 2V to 42V with preboost active and can
“operate in drop-out condition by running at 95% duty
cycle. The devices are intended for applications with
mid- to high-power requirements that operate at a wide
input voltage range such as during automotive cold-
crank or engine stop-start conditions.
and Performance Specifications
• 20µA Quiescent Current in Skip Mode
• ±1% Output-Voltage Accuracy: 5.0V/3.3V Fixed or
Adjustable Between 1V and 10V
● Enables Crank-Ready Designs
• Integrated Preboost for Operation Down to 2V in
Bootstrap Mode
• Wide Input Supply Range from 3.5V to 36V
(without Preboost)
The MAX16930/MAX16931 step-down controllers
operate 180° out-of-phase at frequencies up to 2.2MHz
to allow small external components, reduced output
ripple, and to guarantee no AM band interference. The
switching frequency is resistor adjustable. The FSYNC
input programmability enables three frequency modes
for optimized performance: forced fixed-frequency
operation, skip mode with ultra-low quiescent
current (20µA), and synchronization to an external clock.
The devices also provide a spread-spectrum option to
minimize EMI interference.
● EMI Reduction Features Reduce Interference with
Sensitive Radio Bands without Sacrificing Wide Input
Voltage Range
• 50ns (typ) Minimum On-Time Guarantees Skip-
Free Operation for 3.3V Output from Car Battery
at 2.2MHz
• Frequency-Synchronization Input
• Resistor-Programmable Frequency Between
200kHz and 2.2MHz
● Integration and Thermally Enhanced Packages Save
Board Space and Cost
The MAX16930/MAX16931 are offered with an
asynchronous step-up controller. This preboost cir-
cuitry turns on during low input voltage conditions. It is
designed to provide power to step-down controller chan-
nels with input voltages as low as 2V.
• Dual, 2MHz Step-Down Controllers
• 180° Out-of-Phase Operation
• Current-Mode Controllers with Forced-Continuous
and Skip Modes
• Thermally Enhanced 40-Pin TQFN-EP and
Side-Wettable QFND-EP Packages
The devices also feature a power-OK monitor and
overvoltage and undervoltage lockout. Protection
features include cycle-by-cycle current limit and thermal
shutdown.
● Protection Features Improve System Reliability
• Supply Overvoltage and Undervoltage Lockout
• Overtemperature and Short-Circuit Protection
The devices are available in 40-pin TQFN-EP and
side-wettable QFND-EP packages and are specified
for operation over the -40°C to +125°C automotive
temperature range.
Applications
POL Applications for Automotive Power
Distributed DC Power Systems
Navigation and Radio Head Units
Selector Guide and Ordering Information appear at end of
data sheet.
19-6631; Rev 13; 7/16