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5962-1320201VXC Datasheet(PDF) 9 Page - Texas Instruments |
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5962-1320201VXC Datasheet(HTML) 9 Page - Texas Instruments |
9 / 29 page TPS7H1101-SP www.ti.com SLVSD81 – JANUARY 2016 8 Detailed Description 8.1 Overview The TPS7H1101-SP is 3-A, 1.5- to 7-V LDO linear regulator that uses PMOS pass element configuration. It uses TI’s proprietary process to achieve low noise, high PSRR combined with high thermal performance in a 16-pin ceramic flatpack package (HKR). A number of features are incorporated in the design to provide high reliability and system flexibility. Current foldback, overload, current limit, and thermal protection are incorporated in the design to make it viable for harsh environments. A resistor connected from the current sense (CS) terminal to VIN indicates voltage proportional to the output current. When CS is held high, foldback current limit is enabled. Shorting CS low disables the foldback current limit. A resistor connected from the programmable current limit (PCL) terminal to ground sets the over current limit activation point. When overcurrent limit activation point is reached, it results in LDO going into current foldback mode. Output current is reduced to approximately 50% of the current limit set point. TPS7H1101-SP incorporates thermal protection, which disables the output when the junction temperature rises approximately 185°C, allowing the device to cool. Depending on the power dissipation, thermal resistance, and ambient temperature, the thermal protection turns on. Cycling limits the dissipation of the regulator, protecting it from damage as a result of overheating. The device also has a current sense monitoring feature. A resistor connected from the CS terminal to VIN indicates voltage proportional to the output load current. PCL provides a detailed description of this feature. To provide system flexibility for demanding current needs, the LDO can be configured in parallel operation as indicated in Figure 8. Current Sharing provides detailed parallel operation information. An enable feature is incorporated in the design allowing the user to enable or disable the LDO. Power Good, an open-drain connection, indicates the status of the output voltage. These provide the customers system flexibility in monitoring and controlling the LDO operation. When using the Enable function, VIN voltage must be >3.5 V. For VIN from 1.5 to 7 V, TPS7H1101-SP can be disabled using the Soft-Start (SS) terminal as described in Enable/Disable. Copyright © 2016, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TPS7H1101-SP |
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