TPS40192 Datasheet, PDF (1/35 Pages) Texas Instruments – 4.5V TO 18V INPUT 10 PIN SYNCHRONOUS BUCK CONTROLLER WITH POWER GOOD

TPS40192, TPS40193
www.ti.com
SLUS719 – MARCH 2007
4.5V TO 18V INPUT 10 PIN SYNCHRONOUS BUCK CONTROLLER WITH POWER GOOD
FEATURES
• Input Operating Voltage Range: 4.5 V to 18 V
• Up to 20 A Output Currents
• Supports Pre-Biased Outputs
• 0.5% 0.591 V Reference
• 600 kHz (TPS40192) and 300 kHz (TPS40193)
Switching Frequencies
• Three Selectable Thermally Compensated
Short Circuit Protection Levels
• Hiccup Restart from Faults
• Internal 5-V Regulator
• High and Low side FET RDS_ON Current
Sensing
• 10-Pin 3 mm × 3 mm SON Package
• Internal 4-ms Soft-Start Time
• Thermal Shutdown Protection at 145°C
APPLICATIONS
• Cable Modem CPE
• Digital Set Top Box
• Graphics/Audio Cards
• Entry Level and Mid-Range Servers
CONTENTS
Device Ratings
2
Electrical Characteristics
4
Typical Characteristics
6
Terminal Information
9
Application Information
11
Design Example
17
Additional References
27
DESCRIPTION
TPS40192 and TPS40193 are cost-optimized
synchronous buck controllers that operate from 4.5 V
to 18 V input. These controllers implement a
voltage-mode control architecture with the switching
frequency fixed at either 600 kHz (TPS40192) or 300
kHz (TPS40193). The higher switching frequency
facilitates the use of smaller inductor and output
capacitors, thereby providing a compact
power-supply solution. An adaptive anti-cross
conduction scheme is used to prevent shoot through
current in the power FETs.
SIMPLIFIED APPLICATION DIAGRAM
V_OUT
V_IN
TPS40192/3
ON/OFF
External Logic
Supply
5V or Less,
or BP5
1 ENABLE HDRV 10
2 FB
SW 9
3 COMP BOOT 8
4 VDD
LDRV 7
5 PGD
BP5 6
GND
11
V_OUT
UDG−06063
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.
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