The MAX5073 is a dual-output DC-DC converter with
integrated high-side n-channel power MOSFETs. Each
output can be configured either as a buck converter or
a boost converter. The device is capable of operating
from a wide 5.5V to 23V input voltage range. Each output
is programmable down to 0.8V in the buck mode
and up to 28V in the boost mode with an output voltage
accuracy of ±1%. In the buck mode, converter 1 and
converter 2 can deliver 2A and 1A, respectively. The
output switching frequency of each converter can be
programmed from 200kHz to 2.2MHz to avoid harmonics
in a radio power supply or to reduce the size of the
power supply. Each output operates 180° out-of-phase
thus reducing input-capacitor ripple current, size, and
cost. A SYNC input facilitates external frequency synchronization.
Moreover, a CLKOUT output provides
out-of-phase clock signal with respect to converter 2,
allowing four-phase operation using two MAX5073 ICs
in master-slave configuration.
The MAX5073 includes an internal digital soft-start that
reduces inrush current, eliminates output-voltage overshoot,
and ensures monotonic rise in output voltage
during power-up. The device includes individual shutdown
and a power-good output for each converter.
Protection features include output short-circuit protection
for buck mode and maximum duty-cycle limit for
boost operation, as well as thermal shutdown.
The MAX5073 is available in a thermally enhanced 28-
pin thin QFN package that can dissipate 2.7W at +70°C
ambient temperature. The device is rated for operation
over the -40°C to +85°C extended operating temperature
range.
Key Features
Applications/Uses
4.5V to 5.5V or 5.5V to 23V Input Supply
Voltage Range
0.8V (Buck) to 28V (Boost) Output Voltage
Two Independent Output DC-DC Converters
with Internal Power MOSFETs
Each Output can be Configured in Buck or Boost
Mode
IOUT1 and IOUT2 of 2A and 1A (Respectively) in
Buck Mode
180° Out-of-Phase Operation
Clock Output for Four Phase Operation
Switching Frequency Programmable from 200kHz
to 2.2MHz
Digital Soft-Start and Sync Input
Individual Converter Shutdown and Power-Good
Output
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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