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TPS65145RGE Datasheet(PDF) 1 Page - Texas Instruments |
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TPS65145RGE Datasheet(HTML) 1 Page - Texas Instruments |
1 / 24 page www.ti.com FEATURES DESCRIPTION APPLICATIONS Vin Vo1 Vo3 Power Good Vo2 Vo4 3.3 V Boost Converter Positive Charge Pump Negative Charge Pump Power Good Linear Regulator Controller TPS65140/45 Up to 15 V / 400 mA Up to 30 V / 20 mA Up to −12 V / 20 mA 2.7 V to 5.8 V TPS65140 TPS65145 SLVS497B – SEPTEMBER 2003 – REVISED MARCH 2004 TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND POWER GOOD • 2.7-V to 5.8-V Input Voltage Range The TPS65140/145 offers a compact and small power supply solution to provide all three voltages • 1.6-MHz Fixed Switching Frequency required by thin film transistor (TFT) LCD displays. • 3 Independent Adjustable Outputs The auxiliary linear regulator controller can be used • Main Output up to 15 V With <1% Typical to generate a 3.3-V logic power rail for systems Output Voltage Accuracy powered by a 5-V supply rail only. • Negative Output Voltage Down to -12 V/20 mA The main output Vo1 is a 1.6-MHz fixed frequency • Positive Output Voltage up to 30 V/20 mA PWM boost converter providing the source drive voltage for the LCD display. The device is available in • Auxiliary 3.3-V Linear Regulator Controller two versions with different internal switch current • Internal Soft Start limits to allow the use of a smaller external inductor • Internal Power-On Sequencing when lower output power is required. The TPS65140 has a typical switch current limit of 2.3 A and the • Fault Detection of all Outputs TPS65145 has a typical switch current limit of 1.37 A. • Thermal Shutdown A fully integrated adjustable charge pump • System Power Good doubler/tripler provides the positive LCD gate drive voltage. An externally adjustable negative charge • Available in TSSOP-24 and QFN-24 pump provides the negative gate drive voltage. Due PowerPAD™ Packages to the high 1.6-MHz switching frequency of the charge pumps, inexpensive and small 220-nF capaci- tors can be used. • TFT LCD Displays for Notebooks Additionally, the TPS65140/145 has a system power • TFT LCD Displays for Monitors good output to indicate when all supply rails are • Portable DVD Players acceptable. For LCD panels powered by 5 V, only the • Tablet PCs TPS65140/145 has a linear regulator controller using • Car Navigation Systems an external transistor to provide a regulated 3.3 V output for the digital circuits. For maximum safety, the • Industrial Displays entire device goes into shutdown as soon as one of the outputs is out of regulation. The device can be enabled again by toggling the input or the enable (EN) pin to GND. 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 is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2003–2004, 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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