STW4141 Datasheet | STMicroelectronics

.. Single Coil Dual Output Step Down DC/DC Converter for Digital Base Band and Multimedia Processor Supply PRELIMINARY DATA Features - Single coil dual output switching converter for digital core supply & digital I/Os supply - Digital I/O supply:VOUT1 @ 200 m A - CPU CORE supply:VOUT2 @ 400 m A 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 ±100m V output voltage accuracy full range in PWM (Including Line and Load Transients) 900 k Hz 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 k Hz to 1.5 MHz VSEL input pin for VOUT2/VOUT2(red.) selection Ultra low shutdown current (Iq<1 µA) Short circuit and thermal shutdown protections Solution size 7 x 8 mm - - - TFBGA 3x3mm 16 bumps 0.5 mm pitch Applications - - - - - Mobile phones PDAs and hand held terminals Portable media players Digital still camera WLAN and Bluetooth applications - - - - - Description The STw4141 is a single coil dual output synchronous step down DC/DC converter that requires only four standard external ponents. It operates at a fixed 900 k Hz switching frequency in PWM mode. The device can operate in PFM mode to maintain high efficiency over the full range of output currents. The STw4141 application requires a very small PCB area and offers a very efficient, accurate, space and cost saving solution to fulfill the requirements of digital baseband or multimedia processor supply (CORE & I/O). - - - - Application Test Circuit L 4.7 µH VLX1 VIN=2.7V to 5.5V CIN 10 µF 6.3 V PVDD B1 A2 VLX2 A3 A4 D1 VOUT1 FB1 COUT1 22 µF 6.3...