MAX16990 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Boost/SEPIC Controllers

MAX16990/MAX16992
36V, 2.5MHz Automotive Boost/SEPIC Controllers
General Description
The MAX16990/MAX16992 are high-performance, current-
mode PWM controllers with 4FA (typ) shutdown current
for wide input voltage range boost/SEPIC converters. The
4.5V to 36V input operating voltage 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 oper-
ate 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 fre-
quency 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
FMAX^M packages.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to: www.maximintegrated.com/MAX16990.related
Features
S Operating Voltage Range Down to 4.5V (2.5V or
Lower in Bootstrapped Mode), Immune to Load-
Dump Transient Voltages Up to 42V
S 100kHz to 1MHz (MAX16990) and 1MHz to 2.5MHz
(MAX16992) Switching Frequency Ranges
S ±1% Feedback Voltage Accuracy
S 4µA Shutdown Current
S Adjustable Slope Compensation
S Internal Soft-Start (9ms)
S Current-Mode Control
S PGOOD Output and Hiccup Mode for Enhanced
System Protection
S Overtemperature Shutdown
S -40NC to +125NC Operation
S Compact 12-Pin TQFN (3mm x 3mm) and 10-Pin
µMAX Packages
Applications
Automotive LED Lighting
Automotive Audio/Navigation Systems
Dashboards
Typical Application Circuit
22µF
BOOTSTRAPPED 2.2MHz APPLICATION WITH LOW OPERATING VOLTAGE
BATTERY INPUT
2.5V–40V
1µF
0.47µF
PVL
SUP
10kΩ
PGOOD
DRV
N
1kΩ
ISNS
PVL
2.2µF
MAX16990AUBA /B
FSET/SYNC
FB
COMP
22mΩ
12kΩ
EN
GND
ENABLE
47µF
CERAMIC
17kΩ
91kΩ
PGOOD
13kΩ
N
P
SW_OUT
8V/ 2A
10kΩ
N
µMAX is a registered trademark of Maxim Integrated Products, Inc.
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.
19-6632; Rev 3; 7/13