SIC417_13 Datasheet, PDF (1/21 Pages) Vishay Siliconix – 10-A, 28-V Integrated Buck Regulator with Programmable LDO

SiC417
Vishay Siliconix
microBUCK^TM SiC417
10-A, 28-V Integrated Buck Regulator with Programmable LDO
DESCRIPTION
The Vishay Siliconix SiC417 is an advanced stand-alone
synchronous buck regulator featuring integrated power
MOSFETs, bootstrap diode, and a programmable LDO in a
space-saving MLPQ 5 x 5 - 32 pin package.
The SiC417 is capable of operating with all ceramic solutions
and switching frequencies up to 1 MHz. The programmable
frequency, synchronous operation and selectable
power-save allow operation at high efficiency across the full
range of load current. The internal programmable LDO may
be used to supply 5 V for the gate drive circuits or it may be
bypassed with an external 5 V for optimum efficiency and
used to drive external N-channel MOSFETs or other loads.
Additional features include cycle-by-cycle current limit,
voltage soft-start, under-voltage protection, programmable
over-current protection, soft shutdown and selectable
power-save. The Vishay Siliconix SiC417 also provides an
enable input and a power good output.
PRODUCT SUMMARY
Input Voltage Range
Output Voltage Range
Operating Frequency
Continuous Output Current
Peak Efficiency
Package
3 V to 28 V
0.5 V to 5.5 V
200 kHz to 1 MHz
10 A
95 % at 300 kHz
MLPQ 5 mm x 5 mm
FEATURES
• High efficiency > 92 %
• Internal power MOSFETs:
High-side R_DS(ON) = 27 mΩ
Low-side R_DS(ON) = 9 mΩ
• Integrated bootstrap diode
• Integrated configurable 150 mA LDO with bypass logic
• Temperature compensated current limit
• Pseudo fixed-frequency adaptive on-time control
• All ceramic solution enabled
• Programmable input UVLO threshold
• Independent enable pin for switcher and LDO
• Selectable ultra-sonic power-save mode
• Internal soft-start and soft-shutdown
• 1 % internal reference voltage
• Power good output and over voltage protection
• Halogen-free according to IEC 61249-2-21 definition
• Compliant to RoHS directive 2002/95/EC
APPLICATIONS
• Notebook, desktop and server computers
• Digital HDTV and digital consumer applications
• Networking and telecommunication equipment
• Printers, DSL and STB applications
• Embedded applications
• Point of load power supplies
TYPICAL APPLICATION CIRCUIT
EN-P_SAVE
P_GOOD
EN-LDO
V5V
3
V_LDO
7
12
DH
V_IN
6
BST
8
2 ^FBL
LX
29 ^EN/PSV
26 ^PGOOD
32 ^ENL
PWM
Controller
13
27
I_LIM
15
31 ^tON
AGND
30
P_GND
5
FB DL VOUT
1
14
Document Number: 69062
S10-1367-Rev. D, 14-Jun-10
www.vishay.com
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