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TPS62221 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS62221 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 20 page www.ti.com FEATURES DESCRIPTION APPLICATIONS VI GND EN SW FB C3 4.7 µF L1 4.7 µH C4 10 µF TPS62220 VI 2.5 V to 6 V VO 1.5 V/400 mA R1 360 k Ω R2 180 k Ω C1 22 pF C2 100 pF 1 2 3 5 4 40 45 50 55 60 65 70 75 80 85 90 95 100 0.01 0.1 1 10 100 1000 VO = 1.8 V, L = 4.7 µH, CO = 22 µF VI = 2.7 V VI = 5 V IL − Load Current − mA VI = 3.7 V Typical Application (Adjustable Output Voltage Version) TPS62220, TPS62221, TPS62222 TPS62223, TPS62224 TPS62228, TPS62229 SLVS491C – SEPTEMBER 2003 – REVISED SEPTEMBER 2004 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 • High-Efficiency Synchronous Step-Down Con- The TPS6222x devices are a family of high-efficiency, verter With up to 95% Efficiency synchronous step-down converters ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell • 2.5-V to 6.0-V Input Voltage Range NiMH/NiCd batteries. The devices are also suitable to • Adjustable Output Voltage Range From 0.7 V operate from a standard 3.3-V or 5-V voltage rail. to VI With an output voltage range of 6.0 V down to 0.7 V • Fixed Output Voltage Options Available and up to 400-mA output current, the devices are • Up to 400-mA Output Current ideal to power low voltage DSPs and processors • 1.25-MHz Fixed Frequency PWM Operation used in PDAs, pocket PCs, and smart phones. Under nominal load current, the devices operate with a fixed • Highest Efficiency Over Wide Load Current switching frequency of typically 1.25 MHz. At light Range Due to Power-Save Mode load currents, the part enters the power-save mode • 15-µA Typical Quiescent Current operation; the switching frequency is reduced and the • Soft Start quiescent current is typically only 15 µA; therefore, the device achieves the highest efficiency over the • 100% Duty Cycle Low-Dropout Operation entire load current range. The TPS6222x needs only • Dynamic Output-Voltage Positioning three small external components. Together with the • Available in TSOT23 Package 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 • PDAs and Pocket PC output capacitors. • Cellular Phones, Smart Phones • OMAP™ and Low Power DSP Supply • Digital Cameras • Portable Media Players • Portable Equipment • WLAN PC Cards 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 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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Description similaire - TPS62221 |
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