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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.
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STw4141
Single-coil dual-output step-down DC/DC converter for digital base band and multimedia processor supply
Data Brief
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<1 A) 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 components. It operates at a fixed 900 kHz 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 H VLX1 VIN=2.7V to 5.5V CIN 10 F 6.3 V PVDD
B1 A2
VLX2
A3 A4 D1
VOUT1 FB1 COUT1 22 F 6.3 V
VOUT1=1.8V
VDD
D3
EN AUTO
D4 C2
STw4141
B4 D2 B2 B3
VOUT2 FB2 STATE COUT2 22 F 6.3 V
VOUT2=1.0V/1.2V
VSEL MODE/SYNC
C3 C1
A1
C4
PGND GND
T_MODE
May 2006
Rev 2
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For further information contact your local STMicroelectronics sales office.
Ordering information
STw4141
1
Table 1.
Ordering information
STw4141 order codes
Output voltage options(1) Package Package marking STA1 STA1 STA2 STA2 STA3 STA3 TFBGA 3x3x1.2 16 balls STA4 STA4 STA5 STA5 STA6 STA6 STA7 STA7 Packing
Part number
VOUT1(2) (I/O) 1.8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .8 V 1 .5 V 1 .5 V
VOUT2 (CORE) 1.2 V 1.2 V 1.3 V 1.3 V 1.4 V 1.4 V 1.5 V 1.5 V 1.25 V 1.25 V 1.35 V 1.35 V 1.3 V 1.3 V
VOUT2reduced (CORE) 1 .0 V 1 .0 V 1 .0 V 1 .0 V 1 .2 V 1 .2 V 1 .3 V 1 .3 V 1 .0 V 1 .0 V 1 .0 V 1 .0 V 1 .0 V 1 .0 V
STw41411 STw41411/T STw41412 STw41412/T STw41413 STw41413/T STw41414 STw41414/T STw41415 STw41415/T STw41416 STw41416/T STw41417 STw41417/T
Tray Tape and reel Tray Tape and reel Tray Tape and reel Tray Tape and reel Tray Tape and reel Tray Tape and reel Tray Tape and reel
1. The output configuration which will be introduced in production will be only those related to customer design-in. 2. V O U T 1 V O U T 2 THIS CONDITION MUST BE ALWAYS VALID.
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STw4141
Revision history
2
Revision history
Table 2.
Date 24-Jan-2006 24-May-2006
Document revision history
Revision 1 2 Initial release. Updates in Table 1: STw4141 order codes. Changes
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STw4141
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