STw4141

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Reference	Filesize	Pages	Last updated
STw4141	862 kb	30	20/06/2006

Device	Status	Package
STW41411	Active	TFBGA 3x3x1.2 16 F4x4 0.50
STW41411/T
STW41412
STW41412/T
STW41413
STW41413/T
STW41414
STW41414/T

	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 μA)
	Short circuit and thermal shutdown protections

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).

Block Diagram

Reference	Filesize	Pages	Last updated
STw4141	862 kb	30	20/06/2006

Reference	Filesize	Pages	Last updated
STw4141	58 kb	4	24/05/2006

Reference	Filesize	Pages	Last updated
AN2373	160 kb	15	20/06/2006

Reference	Filesize	Pages	Last updated
UM0481	389 kb	13	19/05/2008