MAX16993 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Step-Down Controller with Dual 2.1MHz Step-Down DC-DC Converters

MAX16993
EVALUATION KIT AVAILABLE
Step-Down Controller with
Dual 2.1MHz Step-Down DC-DC Converters
General Description
The MAX16993 power-management integrated cir-
cuit (PMIC) is a 2.1MHz, multichannel, DC-DC con-
verter designed for automotive applications. The device
integrates three supplies in a small footprint. The device
includes one high-voltage step-down controller (OUT1)
designed to run directly from a car battery and two low-
voltage step-down converters (OUT2/OUT3) cascaded from
OUT1. Under no-load conditions, the MAX16993 consumes
only 30µA of quiescent current, making it ideal for automotive
applications.
The high-voltage synchronous step-down DC-DC controller
(OUT1) operates from a voltage up to 36V continuous and
is protected from load-dump transients up to 42V. There is a
pin-selectable frequency option of either 2.1MHz or a factory-
set frequency for 1.05MHz, 525kHz, 420kHz, or 350kHz. The
low-voltage, synchronous step-down DC-DC converters run
directly from OUT1 and can supply output currents up to 3A.
The device provides a spread-spectrum enable input (SSEN)
to provide quick improvement in electromagnetic interference
when needed. There is also a SYNC I/O for providing either
an input to synchronize to an external clock source or an out-
put of the internally generated clock (see the Selector Guide).
The device includes overtemperature shutdown and overcur-
rent limiting. The device also includes individual RESET_
outputs and individual enable inputs. The individual RESET_
outputs provide voltage monitoring for all output channels.
The MAX16993 is available in a 32-pin side-wettable TQFN-
EP package and is specified for operation over the -40°C to
+125°C automotive temperature range.
Applications
● Automotive
● Industrial
Features
● High-Voltage DC-DC Controller
• 3.5V to 36V Operating Supply Voltage
• 42V Load-Dump Protection
• Output Voltage: Pin Selectable, Fixed or
Resistor-Divider Adjustable
• 350kHz to 2.1MHz Operation
• 30μA Quiescent Current with DC-DC
Controller Enabled
● Dual High-Efficiency 2.1MHz DC-DC Converters
• Run Directly from OUT1
• 3A Integrated FETs
• 0.8V to 3.95V Output Voltage
• Fixed or Resistor-Divider-Adjustable Output Voltage
• 180° Out-of-Phase Operation
● Individual Enable Inputs
● Individual RESET_ Outputs
● Thermal-Warning Indication Output
● Forced-PWM and Skip Modes
● Overtemperature and Short-Circuit Protection
● 32-Pin (5mm x 5mm x 0.8mm)
Side-Wettable TQFN-EP
● -40°C to +125°C Operating Temperature Range
Ordering Information and Selector Guide appear at end of
data sheet.
19-6684; Rev 0; 5/13