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TPS64202DBVTG4 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS64202DBVTG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page TPS64200,TPS64201 TPS64202,TPS64203 SLVS485 − AUGUST 2003 SOT23 STEPDOWN CONTROLLER FEATURES D Step-Down Controller for Applications With up to 95% Efficiency D 1.8-V to 6.5-V Operating Input Voltage Range D Adjustable Output Voltage Range From 1.2 V to VI D High Efficiency Over a Wide Load Current Range D 100% Maximum Duty Cycle for Lowest Dropout D Internal Softstart D 20-µA Quiescent Current (Typical) D Overcurrent Protected D Available in a SOT23 Package APPLICATIONS D USB Powered Peripherals D Organizers, PDAs, and Handheld PCs D Low Power DSP Supply D Digital Cameras D Hard Disk Drives D Portable Audio Players DESCRIPTION The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20- µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of −40 °C to 85°C. TYPICAL APPLICATION CIRCUIT 5 TPS64200 Si5447DC ZHCS2000 EN GND FB SW VIN ISENSE Rs = 33 mΩ 10 µH 3.3 V / 2 A 47 µF PosCap 6TPA47M R1 620 k Ω R2 360 k Ω 10 µF 5 V 0 10 20 30 40 50 60 70 80 90 100 0.0001 0.001 0.01 0.1 1 10 TA = 25°C, VO = 3.3 V TPS64200 EFFICIENCY vs LOAD CURRENT IO − Load Current − A VI = 4.2 V 1 2 3 6 4 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 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. www.ti.com Copyright 2003, Texas Instruments Incorporated |
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