TPS40180 Datasheet, PDF (1/52 Pages) Texas Instruments – SINGLE PHASE STACKABLE CONTROLLER

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TPS40180
SLVS753B – FEBRUARY 2007 – REVISED NOVEMBER 2007
SINGLE PHASE STACKABLE CONTROLLER
FEATURES
1
•2 Stackable to 8 Phases, Multiple Controllers
Can Occupy Any Phase
• 2-V to 40-V Power Stage Operation Range
• eTrim™ in System Reference Voltage Trim to
Tighten Overall Output Voltage Tolerance,
Reference is Better Than 0.75% Un-Trimmed
• VDD From 4.5 V to 15 V, With Internal 5-V
Regulator
• Supports Output Voltage From 0.7 V to 5.8 V
• Supports Pre-Biased Outputs
• 10-µA Shutdown Current
• Programmable Switching Frequency up to
1-MHz per Phase
• Current Feedback Control With Forced Current
Sharing (Patents Pending)
• Resistive Divider Sets Input Undervoltage
Lockout and Hysteresis
• True Remote Sensing Differential Amplifier
• Resistive or Inductor’s DCR Current Sensing
APPLICATIONS
• Graphic Cards
• Servers
• Networking Equipment
• Telecommunications Equipment
• Distributed DC Power Systems
CONTENTS
Description
1
Device Ratings
3
Electrical Characteristics
4
Terminal Information
7
Typical Characteristics
10
Application Information
15
Design Example
35
DESCRIPTION
The TPS40180 is a stackable single-phase
synchronous buck controller. Stacking allows a
modular power supply design where multiple modules
can be connected in parallel to achieve the desired
output power capability if the output power
requirement cannot be provided by one module.
Stacked modules can be configured to switch at
different times while running at the same base
frequency creating a multiple phase supply. Up to
eight phases can be configured, and multiple
modules can be set up to switch on the same phase
if required. Input and output ripple current reduction
occurs as well when modules are stacked. Stacked
modules can be used to generate separate output
rails, load share into a single rail or a combination of
the two while sharing phase information to reduce
ripple currents at the input of the system.
The TPS40180 is optimized for low-output voltage
(from 0.7-V to 5.8-V), high-output current applications
powered from a 2-V to 40-V supply. The TPS40180
converts from 15-V input to 0.7-V output at 1 MHz.
Each phase can be operated at a switching frequency
up to 1 MHz, resulting in an effective ripple frequency
of up to 8 MHz at the input and the output.
With eTrim™, the TPS40180 gives the user the
capability to trim the reference voltage on the device
to compensate for external component tolerances,
tightening the overall system accuracy and allowing
tighter specifications for output voltage of the
converter.
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.
eTrim 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 © 2007, Texas Instruments Incorporated