TPS5300

SLVS334A – DECEMBER 2000 – REVISED SEPTEMBER 2001

MOBILE CPU POWER SUPPLY CONTROLLER

8,1 mm x 11 mm

1

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FEATURES

28 V

Transition Solution

Response Time and Reduced Output

Capacitance

Clock and I/O Voltages

Diode For Increased Efficiency

Dynamic Regulation for Reduced Output

Capacitance

for All Three Outputs

Performance

APPLICATIONS

Technology

Technology

Point-of-Load Applications

DESCRIPTION

The TPS5300 is a hysteretic synchronous-buck

controller, with two on-chip linear regulator controllers,

incorporating dynamic output voltage positioning

technology.

The

TPS5300

provides

a

precise,

programmable supply voltage to a mobile processor or

other processor power applications. A ripple regulator

provides the core voltage, while two linear regulator

drivers regulate external NPN power transistors for the

I/O and CLK voltages. A 5-bit voltage identification

(VID) DAC allows programming for the ripple regulator

voltage to values between 0.925 V to 1.275 V in 25-mV

steps and 1.3 V to 2 V in 50-mV steps. Other voltage

ranges and steps can be easily set. The fast transient

response time and active voltage DROOP positioning

reduce the number of output capacitors required to

keep the output voltage within tight dynamic voltage

regulation limits. The power saving mode (PSM) allows

the user to select a single operating ramp or allows the

controller to automatically switch to lower frequencies

at low loads. The high-gain current sense differential

amplifier allows the use of small-value sense resistors

that minimize conduction losses.

VI = 12 V

Output Voltage Transient Load Response

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

 2001, Texas Instruments Incorporated

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.

Speed Step is a trademark of Intel Corp.

PowerNow is a trademark of Advanced Micro Devices Inc.

PowerPAD is a trademark of Texas Instruments.