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TPS62225 Dataheets PDF



Part Number TPS62225
Manufacturers Texas Instruments
Logo Texas Instruments
Description 400-mA 1.25-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
Datasheet TPS62225 DatasheetTPS62225 Datasheet (PDF)

TPS62220, TPS62221, TPS62222 TPS62223, TPS62224, TPS62225 TPS62227, TPS62228, TPS62229 www.ti.com SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 FEATURES 1 •2 High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency • 2.5-V to 6-V Input Voltage Range • Adjustable Output Volt.

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TPS62220, TPS62221, TPS62222 TPS62223, TPS62224, TPS62225 TPS62227, TPS62228, TPS62229 www.ti.com....................................................................................................................................... SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 FEATURES 1 •2 High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency • 2.5-V to 6-V Input Voltage Range • Adjustable Output Voltage Range From 0.7 V to VI • Fixed Output Voltage Options Available • Up to 400-mA Output Current • 1.25-MHz Fixed Frequency PWM Operation • Highest Efficiency Over Wide Load Current Range Due to Power-Save Mode • 15 µA Typical Quiescent Current • Soft Start • 100% Duty Cycle Low-Dropout Operation • Dynamic Output-Voltage Positioning • Available in TSOT23 Package APPLICATIONS • PDAs and Pocket PC • Cellular Phones, Smart Phones • OMAP™ and Low Power DSP Supply • Digital Cameras • Portable Media Players • Portable Equipment • WLAN PC Cards DESCRIPTION The TPS6222x devices are a family of high-efficiency, synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The devices are also suitable to operate from a standard 3.3-V or 5-V voltage rail. With an output voltage range of 6 V down to 0.7 V and up to 400-mA output current, the devices are ideal for powering the low voltage TMS320™ DSP family and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed switching frequency of typically 1.25 MHz. At light load currents, the part enters the power-save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, the device achieves the highest efficiency over the entire load current range. The TPS6222x needs only three small external components. Together with the tiny TSOT23 package, a minimum system solution size can be achieved. An advanced fast response voltage mode control scheme achieves superior line and load regulation with small ceramic input and output capacitors. VI 2.5 V to 6 V C3 4.7 mF TPS62220 L1 1 VI 4.7 mH SW 5 2 GND 3 EN FB 4 R1 360 kW R2 180 kW C1 22 pF VO 1.5 V/400 mA C4 10 mF C2 100 pF Typical Application (Adjustible Output Voltage Version) Efficency − % 100 95 VO = 1.8 V, 90 L = 4.7 mH, CO = 22 mF 85 80 VI = 2.7 V 75 70 65 60 VI = 3.7 V 55 50 45 40 0.01 VI = 5 V 0.1 1 10 100 IL − Load Current − mA 1000 1 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. OMAP, TMS320 are trademarks of Texas Instruments. 2 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 © 2003–2009, Texas Instruments Incorporated TPS62220, TPS62221, TPS62222 TPS62223, TPS62224, TPS62225 TPS62227, TPS62228, TPS62229 SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009....................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION (1) TA -40 °C to 85 °C OUTPUT VOLTAGE Adjustable 1.2 V 1.5 V 1.6 V 1.7 V 1.8 V 1.875 V 2.2 V 2.3 V THIN-SOT23 PACKAGE TPS62220DDC TPS62227DDC TPS62221DDC TPS62224DDC TPS62229DDC TPS62222DDC TPS62228DDC TPS62225DDC TPS62223DDC SYMBOL ALN BRZ ALO ALQ EJ APP EH NXY ALX (1) The DDC package is available in tape and reel. Add R suffix (TPS62220DDCR) to order quantities of 3000 parts. Add T suffix (TPS62220DDCT) to order quantities of 250 parts. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature (unless otherwise noted) (1) VI Supply voltage on pin (2) Voltages on pins SW, EN, FB (2) PD Continuous power dissipation TJ Operating junction temperature range Tstg Storage temperature Lead temperature (soldering, 10 sec) TPS6222x -0.3 to 7.0 -0.3 to VI +0.3 See Dissipation Rating Table -40 to 150 -65 to 150 260 UNIT V V °C °C °C (1) Stresses beyond those listed under "absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) All voltage values are with respect to network.


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