MAX16932 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – Dual Buck with 20μA Quiescent Current

EVALUATION KIT AVAILABLE
MAX16932/MAX16933
2.2MHz, 36V, Dual Buck
with 20µA Quiescent Current
General Description
The MAX16932/MAX16933 offer two high-voltage, syn-
chronous step-down controllers that use only 20µA of
quiescent current with no load. They operate with an input
voltage supply from 3.5V to 42V 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 and requiring two independently controlled
output supplies, such as automotive applications.
The MAX16932/MAX16933 step-down controllers oper-
ate 180N out-of-phase for reduced input ripple. The
devices also operate with switching frequencies up to
2.2MHz to allow use of small external components and
to guarantee no AM band interference. The FSYNC input
programmability enables three frequency modes for opti-
mized performance: forced fixed-frequency operation,
skip mode with ultra-low quiescent current (20FA), and
synchronization to an external clock. The devices provide
a spread-spectrum option to minimize EMI interference.
The devices also feature a power-OK monitor and over-
voltage and undervoltage lockout. Protection features
include cycle-by-cycle current limit and thermal shut-
down.
The devices are available in a 28-pin TQFN-EP package
and are specified for operation over the -40NC to +125NC
automotive temperature range.
Ordering Information and Selector Guide appear at end of
data sheet.
Features
S Dual, 2.2MHz Step-Down Controllers
S 180° Out-of-Phase Operation to Reduce Noise
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
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 28-Pin TQFN-EP Package
S -40NC to +125NC Operating Temperature
S Spread-Spectrum Option
Applications
POL Applications for Automotive Power
Distributed DC Power Systems
Navigation and Radio Head Units
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX16932.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.
19-6716; Rev 2; 2/14