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TPS65230A2DCARTI ?N/a24784avaiPower Management IC (PMIC) for Digital Set Top Boxes 48-HTSSOP 0 to 85


TPS65230A2DCAR ,Power Management IC (PMIC) for Digital Set Top Boxes 48-HTSSOP 0 to 85FEATURES • Supply Voltage Supervisor Circuit with TwoMonitor Inputs and Open Drain Output• Wide Inp ..
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TPS65230A2DCAR
Power Management IC (PMIC) for Digital Set Top Boxes 48-HTSSOP 0 to 85
1FEATURES
APPLICATIONS
DESCRIPTION/ORDERING INFORMATION
TPS65230, TPS65231
www.ti.com....................................................................................................................................
SLVSA10A–SEPTEMBER 2009–REVISED SEPTEMBER 2009
POWER MANAGEMENT IC FOR DIGITAL SET TOP BOXES
Supply Voltage Supervisor Circuit with Two
Monitor Inputs and Open Drain Output
Wide Input Supply Voltage Range
(10.8V-22V)
Parallel I/OorI2C Control with User Selectable
Address
One Adjustable PWM Buck Controller Advanced Fault Detection and Output Voltage– 10.8-V- 22-V Input Voltage Range Adjustment OptionsinI2C Mode– 3.3-V- 6.1-V Output Voltage Range Pull-Up Current Sources on Buck Enable Pins– 500kHz switching frequency for Accurate Start-Up Timing Control with– TypeIII Compensation Preset Default– Programmable Current Limit Over Current Protection on All Rails Two Adjustable Step-Down Converter with Thermal Shutdownto Protect Device DuringIntegrated Switching FETs: Excessive Power Dissipation 4.75-V- 5.5-V Input Thermally Enhanced Package for Efficient– 0.9-V-3.3-V Output Voltage Range Heat Management (48-pin HTSSOP) 3-A Output Current 1-MHz Switching Frequency Digital Set Top Boxes– Voltage Scaling Option xDSL& Cable Modems– TypeIII Compensation DVD Players Two 100-mΩ, 0.5-A (TPS65230) 1-A (TPS65231) Home Gateway and Access Point NetworksUSB Switches with Over Current Protection Wireless Routersand Open-Drain Fault Pin Early Supply Failure Flag (Open Drain Output) Set when Input Voltage Drops Below 9.3V Early Temperature Warning Flag (Open Drain
Output)is Setif Temperature Approaches
Shut-Down Threshold

The TPS652x provides one PWM buck controller, two adjustable, synchronous buck regulators, two independent
USB power switches anda supply voltage supervisor (SVS)to provide main power functions for satellite set top
boxes, xDSL and cable modem applications operatingoffa 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
forat least 180 ms afterall supply rails rise above their rising edge threshold. Threshold value for VMON1 input set for monitoringa 3.3-V rail without the need for additional external components. Threshold for VMON2 input setto 0.8V and requires resistor dividers on the inputto monitor any positive voltagein the system. The
nBOR/nHOT open-drain outputis pulled lowif the input supply drops below 9.3Vor the chip temperature
approaches the thermal shutdown limit. This allows the system processorto save critical data and shut down
gracefully before the supply fails.
Not Recommended for New Designs
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