MAX16990_15 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – 36V, 2.5MHz Automotive Boost SEPIC Controllers

MAX16990/MAX16992
EVALUATION KIT AVAILABLE
36V, 2.5MHz Automotive Boost/
SEPIC Controllers
General Description
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 for 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.
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.
The MAX16990 and MAX16992 operate in different
frequency ranges. All versions can be synchronized to
an external master clock using the FSET/SYNC input.
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.
Applications
●● Automotive LED Lighting
●● Automotive Audio/Navigation Systems
●● Dashboards
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Benefits and Features
●● Minimized Radio Interference with 2.5MHz Switching
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
• 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
• Overtemperature Shutdown
• -40°C to +125°C Operation
Typical Application Circuit
22µF
BOOTSTRAPPED 2.2MHz APPLICATION WITH LOW OPERATING VOLTAGE
BATTERY INPUT
2.5V to 40V
1µF
0.47µH
PVL
SUP
10kΩ
PGOOD
DRV
N
1kΩ
ISNS
PVL
2.2µF
MAX16992AUBA /B
FSET/SYNC
FB
COMP
22mΩ
12kΩ
GND
EN
ENABLE
47µF
CERAMIC
17kΩ
91kΩ
PGOOD
13kΩ
N
P
SW_OUT
8V/ 2A
10kΩ
N
19-6632; Rev 6; 8/15