STW41414 ST-Ericsson Inc, STW41414 Datasheet - Page 2

• Manufacturer Part Number: STW41414
• Description: IC CONV DC/DC DUAL STDN 16-TFBGA
• Manufacturer: ST-Ericsson Inc
• Type: Step-Down (Buck)r

Specifications of STW41414

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.5V, 1.8V
• Current - Output: 200mA, 400mA
• Frequency - Switching: 900kHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

Features
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Application test circuit
June 2006
Single coil dual output switching converter for
digital core supply & digital I/Os supply
– Digital I/O supply:V
– CPU CORE supply:V
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 V
Ultra low shutdown current (Iq<1 µA)
Short circuit and thermal shutdown protections
V
V
IN
IN
=2.7V to 5.5V
=2.7V to 5.5V
for digital base band and multimedia processor supply
OUT2
Single-coil dual-output step-down DC/DC converter
OUT1
C
C
10 µF
10 µF
6.3 V
6.3 V
OUT2
IN
IN
/V
MODE/SYNC
MODE/SYNC
OUT2(red.)
@ 200 mA
PVDD
PVDD
VDD
VDD
EN
EN
AUTO
AUTO
VSEL
VSEL
@ 400 mA
B1
B1
D3
D3
D4
D4
C2
C2
C3
C3
C1
C1
selection
A2
A2
A1
A1
VLX1
VLX1
PGND
PGND
STw4141
STw4141
L 4.7 µH
L 4.7 µH
C4
C4
GND
GND
Rev 2
B3
B3
A3
A3
T_MODE
T_MODE
VLX2
VLX2
Applications
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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).
A4
A4
D1
D1
B4
B4
D2
D2
B2
B2
16 bumps 0.5 mm pitch
Mobile phones
PDAs and hand held terminals
Portable media players
Digital still camera
WLAN and Bluetooth applications
STATE
STATE
VOUT1
VOUT1
FB1
FB1
VOUT2
VOUT2
FB2
FB2
TFBGA 3x3mm
C
C
22 µF
22 µF
6.3 V
6.3 V
C
C
22 µF
22 µF
6.3 V
6.3 V
OUT1
OUT1
OUT2
OUT2
Solution size
7 x 8 mm
V
V
V
V
OUT1
OUT1
OUT2
OUT2
=1.8V
=1.8V
=1.0V/1.2V
=1.0V/1.2V
STw4141
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