STW41414

IMPORTANT NOTICE Dear customer, As from August 2nd 2008, the wireless operations of STMicroelectronics have moved to a new company, ST-NXP Wireless. As a result, the following changes are applicable to the attached document. ● ● Company name - STMicroelectronics NV is replaced with ST-NXP Wireless. Copyright - the copyright notice at the bottom of the last page “© STMicroelectronics 200x - All rights reserved”, shall now read: “© ST-NXP Wireless 200x - All rights reserved”. Web site - http://www.st.com is replaced with http://www.stnwireless.com Contact information - the list of sales offices is found at http://www.stnwireless.com under Contacts. ● ● If you have any questions related to the document, please contact our nearest sales office. Thank you for your cooperation and understanding. ST-NXP Wireless www.stnwireless.com STw4141 Single-coil dual-output step-down DC/DC converter for digital base band and multimedia processor supply Features ■ Single coil dual output switching converter for digital core supply & digital I/Os supply – Digital I/O supply:VOUT1 @ 200 mA – CPU CORE supply:VOUT2 @ 400 mA Wide range of fixed output voltage configurations available High efficiency synchronous step down converter with up to 92 % for the entire device Size and cost optimized application board (7x8 mm, height 1.2mm) three capacitors and only one inductor necessary for both outputs 2.7 V to 5.5 V battery input range ±100mV output voltage accuracy full range in PWM (Including Line and Load Transients) 900 kHz fixed frequency PWM operation PFM mode operation at light load current PWM/PFM switch can be done automatically or forced by setting external pins (AUTO and MODE/SYNC) MODE/SYNC input pin for external clock synchronization from 600 kHz to 1.5 MHz VSEL input pin for VOUT2/VOUT2(red.) selection Ultra low shutdown current (Iq