TPS84A20 Datasheet, PDF (1/30 Pages) Texas Instruments – 2.95-V to 17-V Input, 10-A Synchronous Buck, Integrated Power Solution

TPS84A20
www.ti.com
SLVSBC6 – MARCH 2013
2.95-V to 17-V Input, 10-A Synchronous Buck, Integrated Power Solution
Check for Samples: TPS84A20
FEATURES
1
•2 Complete Integrated Power Solution Allows
Small Footprint, Low-Profile Design
• 10mm x 10mm x 4.3mm package
• 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
• Supports Parallel Operation for Higher Current
• Optional Split Power Rail allows
input voltage down to 2.95 V
• Adjustable Switching Frequency
(200 kHz to 1.2 MHz)
• Synchronizes to an External Clock
• Provides 180° out-of-phase clock signal
• Adjustable Slow-Start
• Output Voltage Sequencing / Tracking
• Power Good Output
• Programmable Undervoltage Lockout (UVLO)
• Over-Current & Over-Temperature Protection
• Pre-bias Output Start-up
• Operating Temperature Range: –40°C to 85°C
• Enhanced Thermal Performance: 13.3°C/W
• Meets EN55022 Class B Emissions
DESCRIPTION
The TPS84A20 is an easy-to-use integrated power
solution that combines a 10-A DC/DC converter with
power MOSFETs, an 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.
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
with a thermal impedance of 13.3°C/W. The
TPS84A20 offers the flexibility and the feature-set of
a discrete point-of-load design and is ideal for
powering a wide range of ICs and systems.
Advanced packaging technology affords a robust and
reliable power solution compatible with standard QFN
mounting and testing techniques.
SIMPLIFIED APPLICATION
V_IN
PVIN ISHARE
VIN
VOUT
C_IN
SENSE+
TPS84A20
V_OUT
C_OUT
APPLICATIONS
• Broadband & Communications Infrastructure
• Automated Test and Medical Equipment
• Compact PCI / PCI Express / PXI Express
• DSP and FPGA Point-of-Load Applications
100
95
90
85
80
75
Vout = 2.5 V
70
Fsw = 750 kHz
65
PVIN = 3.3 V, VIN = 5 V
60
PVIN = VIN = 5 V
55
PVIN = VIN = 12 V
50
0 1 2 3 4 5 6 7 8 9 10
Output Current (A)
C001
SYNC_OUT
PWRGD
INH/UVLO
VADJ
SS/TR
RT/CLK
STSEL
AGND PGND
R_RT
R_SET
1
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.
Eco-mode is a trademark of Texas Instruments.
2
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