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8
www.ti.com
SLUS535C − MARCH 2003 − REVISED SEPTEMBER 2004
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FEATURES
DESCRIPTION
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Operating Input Voltage 2.25 V to 5.5 V
The TPS4002x family of dc-to-dc controllers are designed
for non-isolated synchronous buck regulators, providing
enhanced operation and design flexability through user
programmability.
Output Voltage as Low as 0.7 V
1% Internal 0.7 V Reference
Predictive Gate Drive N-Channel MOSFET
Drivers for Higher Efficiency
The TPS4002x utilizes a proprietary Predictive Gate
Drive technology to minimize the diode conduction
losses associated with the high-side and synchronous
rectifier N-channel MOSFET transistions. The integrated
charge pump with boost circuit provides a regulated 5-V
gate drive for both the high side and synchronous rectifier
N-channel MOSFETs. The use of the Predictive Gate
Drive technology and charge pump/boost circuits
combine to provide a highly efficient, smaller and less
expensive converter.
Externally Adjustable Soft-Start and Short
Circuit Current Limit
Programmable Fixed-Frequency
100 KHz-to-1 MHz Voltage-Mode Control
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Source-Only Current or Source/Sink Current
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Quick Response Output Transient
Comparators with Power Good Indication
Provide Output Status
Design flexibility is provided through user programmability
of such functions as: operating frequency, short circuit
current detection thresholds, soft-start ramp time, and
external synchronization frequency. The operating
frequency is programmable using a single resistor over a
frequency range of 100 kHz to 1 MHz. Higher operating
frequencies yield smaller component values for a given
converter power level as well as faster loop closure.
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16-Pin PowerPAD Package
APPLICATIONS
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Networking Equipment
Telecom Equipment
Base Stations
Servers
DSP Power
VDD
VOUT
TPS40020
VDD 2.25 V − 5.5 V
ILIM/
SYNC
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2
3
4
5
6
7
8
16
15
BOOT1
HDRV
VOUT
VDD
OSNS
FB
SW 14
BOOT2 13
PVDD 12
LDRV 11
PGND 10
COMP
SS/SD
RT
SGND
9
PWRGD
UDG−02094
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.
PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments.
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Copyright 2004, Texas Instruments Incorporated