TPS65230, TPS65231
www.ti.com .................................................................................................................................... SLVSA10A–SEPTEMBER 2009–REVISED SEPTEMBER 2009
POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
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FEATURES
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Supply Voltage Supervisor Circuit with Two
Monitor Inputs and Open Drain Output
Parallel I/O or I2C Control with User Selectable
Address
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Wide Input Supply Voltage Range
(10.8 V - 22 V)
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One Adjustable PWM Buck Controller
Advanced Fault Detection and Output Voltage
Adjustment Options in I2C Mode
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10.8-V - 22-V Input Voltage Range
3.3-V - 6.1-V Output Voltage Range
500kHz switching frequency
Type III Compensation
Pull-Up Current Sources on Buck Enable Pins
for Accurate Start-Up Timing Control with
Preset Default
Programmable Current Limit
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Over Current Protection on All Rails
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Two Adjustable Step-Down Converter with
Integrated Switching FETs:
Thermal Shutdown to Protect Device During
Excessive Power Dissipation
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4.75-V - 5.5-V Input
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Thermally Enhanced Package for Efficient
Heat Management (48-pin HTSSOP)
0.9-V-3.3-V Output Voltage Range
3-A Output Current
APPLICATIONS
1-MHz Switching Frequency
Voltage Scaling Option
Type III Compensation
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Digital Set Top Boxes
xDSL & Cable Modems
DVD Players
Home Gateway and Access Point Networks
Wireless Routers
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Two 100-mΩ, 0.5-A (TPS65230) 1-A (TPS65231)
USB Switches with Over Current Protection
and Open-Drain Fault Pin
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Early Supply Failure Flag (Open Drain Output)
is Set when Input Voltage Drops Below 9.3 V
Early Temperature Warning Flag (Open Drain
Output) is Set if Temperature Approaches
Shut-Down Threshold
DESCRIPTION/ORDERING INFORMATION
The TPS652x provides one PWM buck controller, two adjustable, synchronous buck regulators, two independent
USB power switches and a supply voltage supervisor (SVS) to provide main power functions for satellite set top
boxes, xDSL and cable modem applications operating off a single 12- to 22-V supply.
The SMPS have integrated switching FETs for optimized power efficiency and reduced external component
count. Each USB switch provides up to 0.5-A (TPS65230) or 1-A (TPS65231) of current as required by
downstream USB devices. All power blocks have thermal and over current/short circuit protection.
The SVS provides two inputs for monitoring positive supply rails. The active-low open-drain output remains low
for at least 180 ms after all supply rails rise above their rising edge threshold. Threshold value for VMON1 input
is set for monitoring a 3.3-V rail without the need for additional external components. Threshold for VMON2 input
is set to 0.8 V and requires resistor dividers on the input to monitor any positive voltage in the system. The
nBOR/nHOT open-drain output is pulled low if the input supply drops below 9.3 V or the chip temperature
approaches the thermal shutdown limit. This allows the system processor to save critical data and shut down
gracefully before the supply fails.
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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.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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