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36V, 2.5MHz Automotive Boost/
SEPIC Controllers
MAX16990/MAX16992
General Description
Benefits and Features
● Minimized Radio Interference with 2.5MHz Switching
The MAX16990/MAX16992 are high-performance,
current-mode PWM controllers with 4μA (typ) shut-
down current for wide input voltage range boost/SEPIC
converters. The 4.5V to 36V input operating volt-
age range makes these devices ideal in automotive
applications, such as front-end “preboost” or “SEPIC”
power supplies and for the first boost stage in high-
power LED lighting applications. An internal low-dropout
regulator (PVL regulator) with a 5V output voltage
enables the MAX16990/MAX16992 to operate directly
from an automotive battery input. The input operating
range can be extended to as low as 2.5V when the
converter output is applied to the SUP input.
Frequency Above the AM Radio Band
● Space-Efficient Solution Design with Minimized
External Components
• 100kHz to 1MHz (MAX16990) and 1MHz to
2.5MHz (MAX16992) Switching-Frequency Ranges
• 12-Pin TQFN (3mm x 3mm) and 10-Pin μMAX
Packages
● Spread Spectrum Simplifies EMI Management Design
● Flexibility with Available Configurations for Boost,
SEPIC, and Multiphase Applications
• Adjustable Slope Compensation
• Current-Mode Control
There are multiple versions of the devices offering one
or more of the following functions: a synchronization
output (SYNCO) for two-phase operation, an overvoltage
protection function using a separate input pin (OVP), and
a reference input pin (REFIN) to allow on-the-fly output
voltage adjustment.
• Internal Soft-Start (9ms)
● Protection Features Support Robust Automotive
Applications
• Operating Voltage Range Down to 4.5V (2.5V or
Lower in Bootstrapped Mode), Immune to
Load-Dump Transient Voltages Up to 42V
• PGOOD Output and Hiccup Mode for Enhanced
System Protection
The MAX16990 and MAX16992 operate in different
frequency ranges. All versions can be synchronized to an
external master clock using the FSET/SYNC input.
• Overtemperature Shutdown
In addition, the MAX16990/MAX16992 have a factory-
programmable spread-spectrum option. Both devices are
available in compact 12-pin TQFN and 10-pin µMAX®
packages.
• -40°C to +125°C Operation
Typical Application Circuit
Applications
BOOTSTRAPPED 2.2MHz APPLICATION WITH LOW OPERATING VOLTAGE
22µF
● Automotive LED Lighting
● Automotive Audio/Navigation Systems
● Dashboards
0.47µH
P
BATTERY INPUT
2.5V to 40V
SW_OUT
8V/2A
47µF
CERAMIC
1µF
17kΩ
PVL
SUP
DRV
N
10kΩ
10kΩ
Ordering Information appears at end of data sheet.
91kΩ
1kΩ
PGOOD
PGOOD
N
ISNS
22mΩ
PVL
MAX16992AUBA/B
2.2µF
FB
FSET/SYNC
COMP
13kΩ
12kΩ
EN
N
GND
ENABLE
µMAX is a registered trademark of Maxim Integrated Products, Inc.
19-6632; Rev 18; 10/21
©
2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.
One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 © 2021 Analog Devices, Inc. All rights reserved.
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