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Power Management Selection Guide

1Q 2003

EAL W ORLD S IGNAL P ROCESSING

2 Power Management Selection Guide Texas Instruments   1Q 2003
Regardless of your design expertise
or time constraints, Texas Instruments
(TI) can provide you with power man-
agement solutions to make it easy for
you to solve today’s difficult power
management design problems.
Whether you require a plug-in power
module to optimize your time-to-
market, need an application note or
evaluation module (EVM) to help in
your design, or require a highly inte-
grated, complex IC with which to design
your own power supply, TI has a solu-
tion for you.
This selection guide is designed to
help you quickly sort through the
broad product offering of TI’s premier
Power Management portfolio.
Each section is designed to provide
you with:
• Key topics to consider
• Graphical representation of the
portfolio
• Table of the key parameters of the
devices
• Available resource information
For more information or technical
assistance, please see the back
cover, or visit TI’s web site at
power.ti.com
Power Management Decision Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Typical Power Applications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Plug-In Power Solutions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
DC/DC Converters (Integrated Switch) 
(SWIFT
TM
Synchronous Buck DC/DC Converters)
 . . .10
Loadshare Controllers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Switching DC/DC Controllers 
(non-isolated applications)
(General Purpose & Processor Power)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PWM Power Supply Controllers 
(single output topologies)  . . . . . . . . . . . . . . . . . . . . . . .14
PWM Power Supply Controllers 
(multiple output topologies) . . . . . . . . . . . . . . . . . . . . . .16
MOSFET Drivers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Hot Swap Power Managers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Power Factor Correctors (PFCs)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
References & Shunt Regulators  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Ring Generators  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Linear and Low Dropout Regulators (LDOs)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Supervisors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
DC/DC Converters (Integrated Switch) 
(Low-Power DC/DC Converters, Output Current ≤1 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Charge Pump DC/DC Converters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Protection ICs 
(Battery Management) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Power Distribution Devices 
(PCMCIA/Cardbus Power Switches, 
Current-Limiting Power Switches and Power Mux ICs)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Chargers 
(Battery Management)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Gas Gauges and Battery Monitors 
(Battery Management)  . . . . . . . . . . . . . . . . . . . . . . .42
Universal Serial Bus (USB) Power Managers  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Real-Time Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
CCFL Backlight Converters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Non-Volatile SRAM (NVSRAM)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Power Management Devices for Digital Signal 
Processors (DSPs) 
(by specific TI DSP)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
TI Worldwide Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Note: Military and industrial versions of some
Power Management products are available.
Please visit power.ti.com/militaryproducts
Table of Contents and Introduction

1Q 2003 Texas Instruments Power Management Selection Guide 3

Switching Regulators & Charge Pumps

UCC35xx/38xx/39xx TPS5xxx/6xxxx

Linear Regulators/SVS Circuits

TPS7xxx TPS3xxx

Plug-In Power Solutions

PTxxx

Battery Charge and Monitor

bqxxx

7.5 A output current or less?

Linear Voltage Regulators,

often called “LDOs.”

Input (system) Voltage _____

Output Voltage(s) _______

Output Current _____

Need Integrated SVS? _____

Require Low Drop-Out? ___

Supply Voltage Supervisors

called SVS or “reset circuit”

# of Voltages to Monitor _____

What Voltage(s) _________

Need Manual Reset? _____

Need Watch-dog Timer? _____

Output Active High or Low ____

Need Over-voltage Detect? ____

Require a Specific Delay? _____

Linear

Switching

Yes

Discrete

Plug-In

Is your application

battery powered?

Is it rechargeable?

Charger ICs:

# of cells _____

NiCd ______

NiMH ______

Li-Ion ______

Lead-acid ____

Alkaline _____

Do you monitor the

battery life, or level?

“Gas Gauge” ICs:

Discharge rate (low, high) _____

Battery capacity (mAh) ______

NiCD, NiMH, Li-Ion, etc? _____

Communication protocol ______

Looking for Discrete

or Plug-In power

supply solution?

Plug-In Power Solutions:

Input (system) Voltage ______

Output Voltage(s) _________

Output Current ______

Step-up or Step-down? ______

Need In-to-Out Isolation? ____

SMT or Through-hole? ______

Air Flow? _________________

Ambient Temperature? ______

Switching DC/DC (efficient)

or Linear (simple)

Voltage Regulator?

Switching Voltage Regulators,

also called DC/DC Converters:

Input (system) Voltage _______

Output Voltage(s) _________

Output Current _______

Step-up or Step-down? _______

Need In-to-Out Isolation? _____

“Hot-Plug” application? ______

This basic decision tree was designed to assist designers in quickly identifying the type of device(s) required.

To use this chart, start from the top left-hand portion (in yellow) and begin answering the questions. Based on your answers, follow the

direction of the arrows given.

Please note that because of the many segments within power management, your decision often extends into other areas. For exam-

ple, once you have determined that you require a switching voltage regulator, you may also need a supply voltage supervisor. Thus, you

are directed to that area of the decision tree. It’s that simple.

Power Management Decision Tree

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