TPS846204.5V to 14.5V Input, 6-A, Synchronous Buck Integrated Power Solution

Power at your Fingertips

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

TPS846204.5V 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

• 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

• Broadband & Communication Infrastructure• Automated Test and Medical Equipment• Compact PCI / PCI Express / PXI Express• DSP & FPGA Point of Load Applications

TPS84620EVM-692SwitcherPro Software

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

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

TPS846204.5V to 14.5V Input, 6-A Synchronous Buck Integrated Power Solution

Small & Easy-to-Mount QFN Package

• 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

21mm x 9 mm total solution size

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 = 0VIN = 12VOUT = 3.3IOUT = 6Ta=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 PCBIntegrated Discrete Shown to scale

TPS84xxx Integrated Power Solution PlanStep-Down

Released

• 14.5Vin max• 6A continuous • 9x15x2.8mm

TPS84620

• 5.5Vin max• 2A continuous• 9x11x1.8mm QFN

TPS84210

• 5.5Vin max• 4A continuous• 9x11x2.8mm QFN

TPS84410

TPS84150

• 50Vin max• 1A continuous• 9x11x1.8mm QFN

TPS84250

• 50Vin max• 2A continuous• 9x11x2.8mm QFN

2Q 2011

Released

In Development

• 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

Logistics and Support

• Factory Support– Marketing: Rich Nowakowski

214-480-1667 (r-nowakowski1@ti.com)– Applications: Eric Wright

214-480-3403 (eric.wright@ti.com