LMZ31704
www.ti.com
SLVSBV8A –JUNE 2013–REVISED AUGUST 2013
®
4A SIMPLE SWITCHER Power Module with 2.95V-17V Input and Current Sharing
in QFN Package
Check for Samples: LMZ31704
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FEATURES
DESCRIPTION
The LMZ31704 SIMPLE SWITCHER power module
is an easy-to-use integrated power solution that
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Complete Integrated Power Solution Allows
Small Footprint, Low-Profile Design
combines
a 4-A DC/DC converter with power
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10mm x 10mm x 4.3mm package
MOSFETs, a shielded inductor, and passives into a
low profile, QFN package. This total power solution
allows as few as three external components and
eliminates the loop compensation and magnetics part
selection process.
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Pin Compatible with LMZ31710 & LMZ31707
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Efficiencies Up To 95%
Eco-mode™ / Light Load Efficiency (LLE)
Wide-Output Voltage Adjust
0.6 V to 5.5 V, with 1% Reference Accuracy
The 10x10x4.3 mm QFN package is easy to solder
onto a printed circuit board and allows a compact
point-of-load design. Achieves greater than 95%
efficiency and excellent power dissipation capability
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Supports Parallel Operation for Higher Current
Optional Split Power Rail Allows
Input Voltages Down to 2.95 V
with
a
thermal impedance of 13.3°C/W. The
LMZ31704 offers the flexibility and the feature-set of
a discrete point-of-load design and is ideal for
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Adjustable Switching Frequency
(200 kHz to 1.2 MHz)
powering
a wide range of ICs and systems.
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Synchronizes to an External Clock
Provides 180° out-of-phase Clock Signal
Adjustable Slow-Start
Advanced packaging technology affords a robust and
reliable power solution compatible with standard QFN
mounting and testing techniques.
Output Voltage Sequencing / Tracking
Power Good Output
Figure 1. SIMPLIFIED APPLICATION
Programmable Undervoltage Lockout (UVLO)
Over-Current & Over-Temperature Protection
Pre-bias Output Start-up
V
IN
PVIN
VIN
ISHARE
VOUT
V
OUT
CIN
Operating Temperature Range: –40°C to 85°C
Enhanced Thermal Performance: 13.3°C/W
Meets EN55022 Class B Emissions
SENSE+
C
OUT
LMZ31704
SYNC_OUT
PWRGD
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Integrated Shielded Inductor
INH/UVLO
APPLICATIONS
VADJ
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Broadband & Communications Infrastructure
Automated Test and Medical Equipment
Compact PCI / PCI Express / PXI Express
DSP and FPGA Point-of-Load Applications
SS/TR
RT/CLK
R
SET
STSEL
R
RT
AGND PGND
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Eco-mode is a trademark of Texas Instruments.
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated