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TPS62050 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS62050 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 21 page www.ti.com FB PG VIN 8 LBO GND SYNC EN LBI PGND TPS62052 SW 1 6 7 3 2 9 5 4 10 Ci = 10 µF Co = 22 µF VO = 1.5 V / 800 mA L1 = 10 µH VI = 3.3 V to 10 V TYPICAL APPLICATION CIRCUIT IO – Output Current – mA 50 30 10 0.01 0.1 1 10 60 70 TPS62050 EFFICIENCY vs OUTPUT CURRENT 100 100 1 k 80 20 0 40 90 VI = 7.2 V, VO = 5 V, SYNC = L TPS62050, TPS62051 TPS62052, TPS62054, TPS62056 SLVS432D – SEPTEMBER 2002 – REVISED OCTOBER 2003 800-mA SYNCHRONOUS STEP-DOWN CONVERTER FEATURES DESCRIPTION • High-Efficiency Synchronous Step-Down The TPS6205x devices are a family of high-efficiency Converter With up to 95% Efficiency synchronous step-down dc/dc converters ideally suited • 12-µA Quiescent Current (Typ) for systems powered from a 1-cell or 2-cell Li-Ion battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline • 2.7-V to 10-V Operating Input Voltage Range battery. • Adjustable Output Voltage Range From 0.7 V to 6 V The TPS62050 is a synchronous PWM converter with integrated N-channel and P-channel power MOSFET • Fixed Output Voltage Options Available in switches. Synchronous rectification increases ef- 1.5 V, 1.8 V, and 3.3 V ficiency and reduces external component count. To • Synchronizable to External Clock Signal up to achieve highest efficiency over a wide load current 1.2 MHz range, the converter enters a power-saving • High Efficiency Over a Wide Load Current pulse-frequency modulation (PFM) mode at light load Range in Power-Save Mode currents. Operating frequency is typically 850 kHz, • 100% Maximum Duty Cycle for Lowest allowing the use of small inductor and capacitor values. Dropout The device can be synchronized to an external clock • Low Noise Operation in Forced Fixed signal in the range of 600 kHz to 1.2 MHz. For low noise Frequency PWM Operation Mode operation, the converter can be programmed into forced-fixed frequency in PWM mode. In shutdown • Internal Softstart mode, the current consumption is reduced to less than • Overtemperature and Overcurrent Protected 2 µA. The TPS6205x is available in the 10-pin (DGS) • Available in 10-Pin Microsmall Outline micro-small outline package (MSOP) and operates Package MSOP over an free air temperature range of -40 °C to 85°C. APPLICATIONS • Cellular Phones • Organizers, PDAs, and Handheld PCs • Low Power DSP Supply • Digital Cameras and Hard Disks MATHCAD is a trademark of Mathsoft Incorporated. 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. PRODUCTION DATA information is current as of publication date. Copyright © 2002 – 2003, Texas Instruments Incorporated Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily in- clude testing of all parameters. |
Numéro de pièce similaire - TPS62050 |
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Description similaire - TPS62050 |
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