TPS84620 Datasheet, PDF (1/33 Pages) Texas Instruments – 4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution

TPS84620
www.ti.com
9 mm × 15 mm × 2.8 mm
SLVSA43A – OCTOBER 2010 – REVISED JANUARY 2011
4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution
Check for Samples: TPS84620
FEATURES
1
•2 Complete Integrated Power Solution Allows
Small Footprint, Low-Profile Design
• Efficiencies Up To 96%
• Wide-Output Voltage Adjust
1.2 V to 5.5 V, with 1% Reference Accuracy
• Optional Split Power Rail allows
input voltage down to 1.7 V
• Adjustable Switching Frequency
(480 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
• 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/tps84620
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
65
V_OUT = 3.3 V
f_SW = 630 kHz
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)
DESCRIPTION
The TPS84620RUQ 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 TPS84620 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
PVIN
V
PWRGD
IN
VIN
C_IN
TPS84620
VOUT
RT/CLK
SENSE+
INH/UVLO
SS/TR
VADJ
STSEL
PGND
AGND
V
OUT
C_OUT
R
SET
UDG-10021
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 © 2010–2011, Texas Instruments Incorporated