QFN-10 TPS62350 TPS62351 CSP-12 www.ti.com SLVS540 – MAY 2006 800-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER WITH I2C™ COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING FEATURES • • • • • The TPS6235x device is a high-frequency synchronous step-down dc-dc converter optimized for battery-powered portable applications. Intended for low-power applications, the TPS6235x supports up to 800-mA load current and allows the use of small, low cost inductors and capacitors. The device is ideal for mobile phones and similar portable applications powered by a single-cell Li-Ion battery. With an output voltage range adjustable via I2C interface down to 0.6 V, the device supports low-voltage DSPs and processors core power supplies in smart-phones, PDAs, and handheld computers. The TPS6235x operates at 3-MHz fixed switching frequency and enters the efficiency optimized power-save mode operation at light load currents to maintain high efficiency over the entire load current range. In the shutdown mode, the current consumption is reduced to less than 2 µA. The serial interface is compatible with Fast/Standard and High-Speed mode I2C specification allowing transfers at up to 3.4 Mbps. This communication interface is used for dynamic voltage scaling with voltage steps down to 12.5 mV, for reprogramming the mode of operation (Light PFM, Fast PFM or Forced PWM) or disable/enabling the output voltage. APPLICATIONS • • • • • • SmartReflex™ Compliant Power Supply Split Supply DSPs and µP Solutions OMAP™, XSCALE™ Cell Phones, Smart-Phones PDAs, Pocket PCs Digital Cameras Micro DC-DC Converter Modules EFFICIENCY vs LOAD CURRENT TYPICAL APPLICATION TPS62350YZG VI C1 2.7 V .. 6 V A VO = Roof VO = Floor I2C Bus up to 3.4 Mbips PVIN FB AVIN SW PGND PGND EN VSEL SDA SCL SYNC AGND VO L1 1 mH A C2 10 mF 100 90 80 70 60 50 40 30 20 10 0 VI = 3.6 V VO = 1.35 V LPFM/PWM Mode 0.1 1 10 100 1000 IO − Load Current − mA 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. NanoFree, SmartReflex, OMAP, PowerPAD are trademarks of Texas Instruments. XSCALE is a trademark of Intel Corporation. I2C is a trademark of Philips Corporation. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. Copyright © 2006, Texas Instruments Incorporated PRODUCT PREVIEW • 88% Efficiency at 3-MHz Operation 800-mA Output Current at VI = 2.7 V 3-MHz Fixed Frequency Operation Best in Class Load and Line Transient Complete 1-mm Component Profile Solution ±2.0% PWM DC Voltage Accuracy 35-ns Minimum On-Time Efficiency Optimized Power-Save Mode (Light PFM) Transient Optimized Power-Save Mode (Fast PFM) 28-µA Typical Quiescent Current I2C Compatible Interface up to 3.4 Mbps Pin-Selectable Output Voltage Synchronizable On the Fly to External Clock Signal Available in a 10-Pin QFN (3 x 3 mm) and 12-Pin NanoFree™ (CSP) Packaging Efficiency − % • • • • • • • • DESCRIPTION