MAX16930 Datasheet, PDF (1/29 Pages) Maxim Integrated Products – 2MHz, 36V, Dual Buck with Preboost and 20μA Quiescent Current

EVALUATION KIT AVAILABLE
MAX16930/MAX16931
2MHz, 36V, Dual Buck with Preboost and
20µA Quiescent Current
General Description
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 oper-
ate 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.
The MAX16930/MAX16931 step-down controllers oper-
ate 180N 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 switch-
ing frequency is resistor adjustable. The FSYNC input
programmability enables three frequency modes for
optimized performance: forced fixed-frequency opera-
tion, skip mode with ultra-low quiescent current (20FA),
and synchronization to an external clock. The devices
also provide a spread-spectrum option to minimize EMI
interference.
The MAX16930/MAX16931 are offered with an asynchro-
nous step-up controller. This preboost circuitry turns on
during low input voltage conditions. It is designed to pro-
vide power to step-down controller channels with input
voltages as low as 2V.
The devices also feature a power-OK monitor and
overvoltage and undervoltage lockout. Protection
features include cycle-by-cycle current limit and thermal
shutdown.
The devices are available in a 40-pin TQFN-EP package
and are specified for operation over the -40NC to +125NC
automotive temperature range.
Features
S Dual, 2MHz Step-Down Controllers
S Preboost for Operation to 2V
S 180° Out-of-Phase Operation
S 50ns Minimum On-Time Allows 3.3V Output from
Car Battery at 2.2MHz
S 20µA Operating Current
S Wide Input Supply Range from 3.5V to 36V (with-
out Preboost)
S Resistor Programmable Frequency Between
200kHz and 2.2MHz
S Q1% Output-Voltage Accuracy: 5.0V/3.3V Fixed or
Adjustable Between 1V and 10V
S Current-Mode Controllers with Forced Continuous
and Skip Modes
S Frequency Synchronization Input
S Supply Overvoltage and Undervoltage Lockout
S Overtemperature and Short-Circuit Protection
S Thermally Enhanced 40-Pin TQFN-EP Package
S -40NC to +125NC Operating Temperature
Applications
POL Applications for Automotive Power
Distributed DC Power Systems
Navigation and Radio Head Units
Ordering Information and Selector Guide appear at end of
data sheet.
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX16930.related
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6631; Rev 1; 7/13