Transcript 3GSM 2006 - Barcelona

Power at your Fingertips
TPS84620
4.5V to 14.5V Input, 6-A, Synchronous Buck
Integrated Power Solution
Growing trend to simplify POL Solutions
• Designers must quickly solve technical
problems during the development phase
– A simple power solution reduces
burdens and brings peace-of-mind
– Allows focus on core competency
• Many architectural standards have fixed
chassis sizes and power supply budgets
– Increasing PCB density allows
designers to further differentiate their
product
– High power efficiency allows increased
card density and higher product
performance
Greatest need is a simple POL solution to increase density without sacrificing performance
TPS84620
4.5V to 14.5V Input, 6-A Synchronous Buck Integrated Power Solution
• Integrated Inductor and Passives
• Easy to Mount 15 x 9 x 2.8mm QFN
Package Delivers 800W/in3 Solution
• 95% Peak Efficiency and 13°C/W ӨJA
Thermal Resistance
• Adjustable Frequency, Soft Start, &
UVLO with Track, Clock and PG pins
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Broadband & Communication Infrastructure
Automated Test and Medical Equipment
Compact PCI / PCI Express / PXI Express
DSP & FPGA Point of Load Applications
TPS84620EVM-692
SwitcherPro Software
• As Few as 3 External Components Required
• 40% Smaller Package than Competitive 12V,
6A Integrated Inductor Solutions
• Low Thermal Resistance Delivers Full 6-A
Rated Current without Airflow
• Provides the Design Flexibility of a Discrete
Solution
1.2V to 5.5Vout
Easy to Use Point-of-Load
Only 3 External Components
• Requires only input & output capacitors, and a voltage
programming resistor
• Frequency preset to 480kHz
Additional Features
• Optional components:
– Frequency select resistor
– UVLO programming resistors
– Soft start capacitor
– Sequencing/Tracking resistors
TPS84620
4.5V to 14.5V Input, 6-A Synchronous Buck Integrated Power Solution
Feature Set of a Discrete Solution
• Adjustable Fsw from 480kHz to 780kHz at
RT pin
• Tracking (TR) pin configures various
sequencing schemes
• Clock (CLK) pin synchronizes frequency to a
master clock to avoid beat noise
• Adjustable under voltage lock out (UVLO)
• Programmable slow-start (SS)
• Remote sensing VSENSE+ pin improves
regulation when connected to Vout near the
load
• Powergood and Inhibit pins available
Small & Easy-to-Mount QFN Package
21mm x 9 mm
total solution size
• Small 9mm x 15mm x 2.8mm
QFN package:
– Achieves 800W/in3 density
including external components
– Occupies as little as 200mm2
including external components
• Package is easy to mount on
the circuit board
– See App Note SLUA271
• Pins are accessible from all
four package sides
Top / Side View
TPS84620 Thermal Performance
Excellent Thermal Performance
• Provides 6A continuous output
current up to 85°C ambient
with no airflow; 12V and 5V
inputs
• 13°C/W junction to ambient
thermal resistance keeps the
device and circuit board cooler
for long term reliability
• 58.9°C maximum package
temperature under operating
conditions shown:
LFM = 0
VIN = 12
VOUT = 3.3
IOUT = 6
Ta=28.8°C
TPS84620 Efficiency: 12V & 5V Input
High Efficiency over different output voltages
Electromagnetic Interference
• The TPS84620 is compliant with EN55022 Class B radiated
emissions.
• Both graphs include the plots of the antenna in the horizontal and
vertical positions.
August 24, 2009
TI Internal Information
9
TPS84620 Preferences Summary
1. Ease of Use
– No Magnetics Selection or
Layout
– No Loop Compensation
– Fewer Passive Components
2. Performance
– Good package thermal
dissipation
– Similar feature set and
efficiency of a discrete
DC/DC converter
3. Size
– Novice not able to achieve
small solution size
– 2.8mm height; use on back
side of PCB
Integrated
Discrete
Shown to scale
TPS84xxx Integrated Power Solution Plan
Step-Down
Released
In Development
TPS84150
TPS84250
• 50Vin max
• 1A continuous
• 9x11x1.8mm QFN
• 50Vin max
• 2A continuous
• 9x11x2.8mm QFN
TPS84620
• 14.5Vin max
• 6A continuous
• 9x15x2.8mm
TPS84210
TPS84410
• 5.5Vin max
• 2A continuous
• 9x11x1.8mm QFN
• 5.5Vin max
• 4A continuous
• 9x11x2.8mm QFN
Released
2Q 2011
Logistics and Support
• Samples and Evaluation Module
– In stock and orderable
– TPS84620EVM-692 is $49
– TPS84620 is $7.00 @ 1K resale
– Low parts-count reference design
BOM, Schematic, and layout files in
product folder
• SwitcherPro software support
• Frequently Asked Questions Document
in ESP
• Qualification Memo Document in ESP
• Factory Support
– Marketing: Rich Nowakowski
214-480-1667 ([email protected])
– Applications: Eric Wright
214-480-3403 ([email protected]