SIP12109 Datasheet, PDF (1/17 Pages) Vishay Siliconix – 4 A continuous output current

www.vishay.com
SiP12109
Vishay Siliconix
4 A, 4.5 V to 15 V Input
Synchronous Buck Regulator
DESCRIPTION
The SiP12109 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 4 A continuous current
at 1.5 MHz switching frequency. This regulator produces an
adjustable output voltage down to 0.6 V from 4.5 V to 15 V
input rail to accommodate a variety of applications,
including computing, consumer electronics, telecom, and
industrial.
SiP12109’s CM-COT architecture delivers ultra-fast
transient response with minimum output capacitance and
tight ripple regulation at very light load. The part is stable
with any capacitor type and no ESR network is required for
loop stability. 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 SiP12109 is available in lead (Pb)-free power enhanced
3 mm x 3 mm QFN-16 package.
TYPICAL APPLICATION CIRCUIT
FEATURES
• 4.5 V to 15 V input voltage
• Adjustable output voltage down to 0.6 V
• 4 A continuous output current
• Selectable switching frequency from 400 kHz to
1.5 MHz with an external resistor
• 95 % peak efficiency
• Stable with any capacitor. No external ESR network
required
• Ultrafast transient response
• Power saving scheme for increased light load efficiency
• ± 1 % accuracy of V_OUT setting
• Cycle-by-cycle current limit
• Fully protected with OTP, SCP, UVP, OVP
• PGOOD Indicator
• -40 °C to +125 °C operating junction temperature
• Output voltage tracking
• Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
• Point of load regulation for low-power processors,
network processors, DSPs, FPGAs, and ASICs
• Low voltage, distributed power architectures with 5 V
or 12 V rails
• Computing, broadband, networking, LAN/WAN, optical,
test and measurement
• A/V, high density cards, storage, DSL, STB, DVR, DTV,
Industrial PC
INPUT = 4.5 V to 15 V
ENABLE
POWER GOOD
PGOOD EN BOOT
V_{I N}
LX
SS
V_CC
P_{G N D}
A_{G N D}
V_FB
COMP
R_{O N}
VOUT
Fig. 1 - Typical Application Circuit for SiP12109
S13-2479-Rev. A, 16-Dec-13
1
Document Number: 62694
For technical questions, contact: [e-mail]
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