al for
MTK only
RT5738
®
DS5738-P02_MTK August 2016
1
© Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Preliminary
APPlications
Application, Graphic, and
DSP Processors
arm TM , Tegra TM , OMAP TM , NovaThor TM , ARMADA TM ,
Krait TM , etc.
Hard Disk Drives,
LPDDR3, LP
DDR4
Tablets, Netbooks, Ultra-Mobile PCs
Smart Phones
Gaming
devices
General Description
The RT5738 is a step-down switching voltage regulator
that delivers a digitally programmable output f
rom an input
voltage supply of 2.5V to 5.5V. The output voltage is
programmed through an I 2 C interface capable of operating
up to 3.4MHz.
Using a proprietary architecture with synchronous
rectification, the RT5738 is capable of delivering 3A
continuous at over 80% efficiency, maintaining that
efficiency at load
currents as low as 10mA. The regulator
operates at a nominal fixed frequency of 2.4MHz, which
reduces the value of the external components. Additional
output capacitance can be added to improve regulation
during load transients without affecting stability.
At moderate and light loads, Pulse Frequency Modulation
(PFM) is used to operate in
power-Save Mode with a typical
quiescent current of 40μA at room temperature. Even with
such a low quiescent current, the part exhibits excellent
transient response during large load swings. At higher
loads, the
system automati
cally switches to fixed-
frequency control, operating at 2.4MHz. In Shutdown
Mode, the supply current is typically 0.1μA, excellent in
reducing power consumption. PFM Mode can be disabled
if fixed frequency is desired. The RT5738 is available in a
small WL-CSP-15B 1.31x2.02 (BSC)
SIMplified Application Circuit
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文言文
发表于 2018-2-9 12:08:51
发表于 2018-5-16 15:54:05
