19-4222; Rev 0; 7/08
2.2MHz, 3A Buck or Boost Converters
with an Integrated High-Side Switch
6/MAX15037
General Description
Features
o 4.5V to 5.5V or 5.5V to 23V Input Voltage Range
The MAX15036/MAX15037 high-frequency, DC-DC con-
verters with an integrated n-channel power MOSFET
provide up to 3A of load current. The MAX15036
includes an internal power MOSFET to enable the
design of a nonsynchronous buck or boost topology
power supply. The MAX15037 is for the design of a
synchronous buck topology power supply. These
devices operate from a 4.5V to 5.5V or 5.5V to 23V
input voltage and offer the ability to set the switching
frequency from 200kHz to 2.2MHz with an external
resistor. The voltage-mode architecture with a peak
switch current-limit scheme provides stable operation
up to a 2.2MHz switching frequency. The MAX15036
includes a clock output for driving a second DC-DC
converter 180° out-of-phase and a power-on-reset
(RESET) output. The MAX15037 includes a power-good
output and a synchronous rectifier driver to drive an
external low-side MOSFET in the buck converter config-
uration for high efficiency.
o Output Voltage Adjustable Down to 0.6V (Buck) or
Up to 28V (Boost)
o 3A Output Current
o Synchronous Rectifier Driver Output (MAX15037)
for Higher Efficiency
o Resistor-Programmable Switching Frequency
from 200kHz to 2.2MHz
o External Synchronization and Enable (On/Off)
Inputs
o Clock Output for Driving Second Converter 180°
Out-Of-Phase (MAX15036)
o Integrated 150mΩ High-Side n-Channel Power
MOSFET
o Power-On-Reset Output (MAX15036)/Power-Good
Output (MAX15037)
o Short-Circuit Protection (Buck)/Maximum Duty-
Cycle Limit (Boost)
o Thermal-Shutdown Protection
The MAX15036/MAX15037 protect against overcurrent
conditions by utilizing a peak current limit as well as
overtemperature shutdown providing a very reliable
and compact power source for point-of-load regulation
applications. Additional features include synchroniza-
tion, internal digital soft-start, and an enable input. The
MAX15036/MAX15037 are available in a thermally
enhanced, space-saving 16-pin TQFN (5mm x 5mm)
package and operate over the -40°C to +125°C tem-
perature range.
o Thermally Enhanced 16-Pin TQFN Package
Dissipates 2.7W
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
MAX15036ATE+
MAX15037ATE+
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Applications
Pin Configurations
xDSL Modem Power Supplies
Automotive Radio Power Supplies
Servers and Networks
TOP VIEW
12
11
10
9
IP Phones/WLAN Access Points
V
8
7
6
5
SYNC
13
L
Selector Guide
RESET 14
V+
PART
CONFIGURATION
FEATURES
MAX15036
Nonsynchronous
Buck or Boost
RESET Output,
Clock Output
BST/VDD 15
BYPASS
OSC
MAX15036ATE
16
EN
EP*
PGOOD Output,
Synchronous FET
Driver
+
MAX15037ATE
Synchronous Buck
1
2
3
4
Pin Configurations continued at end of data sheet.
THIN QFN
5mm x 5mm
*EXPOSED PAD.
________________________________________________________________ Maxim Integrated Products
1
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.