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Si4812BDY 数据表(PDF) 1 Page - Vishay Siliconix

部件名 Si4812BDY
功能描述  5 V, 3 A Current-Mode Constant On-Time Synchronous Buck Regulator
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制造商  VISHAY [Vishay Siliconix]
网页  http://www.vishay.com
标志 VISHAY - Vishay Siliconix

Si4812BDY 数据表(HTML) 1 Page - Vishay Siliconix

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SiP12107
www.vishay.com
Vishay Siliconix
S12-0412-Rev. B, 20-Feb-12
1
Document Number: 63395
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
5 V, 3 A Current-Mode Constant On-Time
Synchronous Buck Regulator
DESCRIPTION
The SiP12107 is a high frequency current-mode constant
on-time
(CM-COT)
synchronous
buck
regulator
with
integrated high-side and low-side power MOSFETs. Its
power stage is capable of supplying 3 A continuous current
at 4 MHz switching frequency. This regulator produces an
adjustable output voltage down to 0.6 V from 2.8 V to 5.5 V
input rail to accommodate a variety of applications,
including computing, consumer electronics, telecom, and
industrial.
SiP12107’s
CM-COT
architecture
delivers
ultra-fast
transient response with minimum output capacitance and
tight ripple regulation at very light load. No ESR or external
ESR network is required for loop stability purpose. The
device also incorporates a power saving scheme that
significantly increases light load efficiency.
The regulator integrates a full protection feature set,
including output overvoltage protection (OVP), output under
voltage protection (UVP) and thermal shutdown (OTP). It
also has UVLO for input rail and internal soft-start ramp.
The SiP12107 is available in lead (Pb)-free power enhanced
MLP-16L package in 3 mm x 3 mm dimension.
FEATURES
• Halogen-free According to IEC 61249-2-21
Definition
• 2.8 V to 5.5 V input voltage
• Adjustable output voltage down to 0.6 V
• 3 A continuous output current
• Programmable switching frequency up to 4 MHz
• 95 % peak efficiency
• Supports all ceramic capacitors No external ESR required
• Ultrafast transient response
• Selectable power saving mode or force current mode
• ± 1 % accuracy
• Pulse-by-pulse current limit
• Scalable with SiP12108 - 5A
• Fully protected with OTP, SCP, UVP, OVP
•PGood Indicator
• Compliant to RoHS Directive 2011/65/EU
APPLICATIONS
• Notebook computers
• Desktop PCs and servers
• Handheld devices
• POLs for telecom
• Consumer electronics
• Industrial and automation
TYPICAL APPLICATION CIRCUIT AND PACKAGE OPTIONS
Fig. 1 - Typical Application Circuit for SiP12107
V
IN
PGD
EN
AV
IN
LX
INPUT = 2.8 V to 5.5 V
P
GND
A
GND
POWER GOOD
ENABLE
V
OUT
V
OUT
V
FB
GMO
R
ON
AUTO
PWR_SAVE_MODE


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