TPS84621 Datasheet, PDF (1/30 Pages) Texas Instruments – 4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution

TPS84621
www.ti.com
SLVSAW7A – DECEMBER 2011 – REVISED APRIL 2012
4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution
Check for Samples: TPS84621
FEATURES
1
•2 Complete Integrated Power Solution Allows
Small Footprint, Low-Profile Design
• Efficiencies Up To 96%
• Wide-Output Voltage Adjust
0.6 V to 5.5 V, with 1% Reference Accuracy
• Optional Split Power Rail allows
input voltage down to 1.6 V
• Adjustable Switching Frequency
(250 kHz to 780 kHz)
• Synchronizes to an External Clock
• Adjustable Slow-Start
• Output Voltage Sequencing / Tracking
• Power Good Output
• Programmable Undervoltage Lockout (UVLO)
• Output Overcurrent Protection (Hiccup Mode)
• Over-Temperature Protection
• Pre-bias Output Start-up
• Operating Temperature Range: –40°C to 85°C
• Enhanced Thermal Performance: 13°C/W
• Meets EN55022 Class B Emissions
• For Design Help Including SwitcherPro™ visit
http://www.ti.com/TPS84621
APPLICATIONS
• Broadband & Communications Infrastructure
• Automated Test and Medical Equipment
• Compact PCI / PCI Express / PXI Express
• DSP and FPGA Point of Load Applications
• High Density Distributed Power Systems
100
95
90
85
80
75
70
V_OUT = 3.3 V
f_SW = 630 kHz
65
60
55
PV_IN = V_IN = 5 V
PV_IN = V_IN = 12 V
50
0
1
2
3
4
5
6
Output Current (A)
G000
DESCRIPTION
The TPS84621RUQ is an easy-to-use integrated
power solution that combines a 6-A DC/DC converter
with power MOSFETs, an inductor, and passives into
a low profile, BQFN package. This total power
solution allows as few as 3 external components and
eliminates the loop compensation and magnetics part
selection process.
The 9×15×2.8 mm BQFN package is easy to solder
onto a printed circuit board and allows a compact
point-of-load design with greater than 90% efficiency
and excellent power dissipation with a thermal
impedance of 13°C/W junction to ambient. The
device delivers the full 6-A rated output current at
85°C ambient temperature without airflow.
The TPS84621 offers the flexibility and the feature-
set of a discrete point-of-load design and is ideal for
powering performance DSPs and FPGAs. Advanced
packaging technology afford a robust and reliable
power solution compatible with standard QFN
mounting and testing techniques.
SIMPLIFIED APPLICATION
V_IN
C_IN
VIN
PVIN
PWRGD
TPS84621
VOUT
RT/CLK
SENSE+
INH/UVLO
SS/TR
VADJ
STSEL
PGND
AGND
V_OUT
C_OUT
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.
SwitcherPro 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 © 2011–2012, Texas Instruments Incorporated