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Vishay Intertechnology Electronic Components Datasheet

SIC414 Datasheet

28 V Integrated Buck Regulator

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SiC414
Vishay Siliconix
microBUCKTM SiC414
6 A, 28 V Integrated Buck Regulator with 5 V LDO
DESCRIPTION
The Vishay Siliconix SiC414 is an advanced stand-alone
synchronous buck regulator featuring integrated power
MOSFETs, bootstrap switch, and an internal 5 V LDO in a
space-saving MLPQ 4 x 4 - 28 pin package.
The SiC414 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 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 SiC414 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
0.75 V to 5.5 V
200 kHz to 1 MHz
6A
95 % at 300 kHz
MLPQ 4 mm x 4 mm
FEATURES
• High efficiency > 95 %
• 6 A continuous output current capability
• Integrated bootstrap switch
• Integrated 5 V/200 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
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• Printers, DSL and STB applications
• Embedded applications
• Point of load power supplies
TYPICAL APPLICATION CIRCUIT
LDO_EN
VOUT
EN/PSV (Tri-State)
3.3 V
PGOOD
28 27 26 25 24 23 22
1 FB
LX 21
2 V5V
3 AGND
PAD1
AGND
LX 20
PGND 19
VIN
4 VOUT
PAD3
LX
PGND 18
5 VIN
6 VLDO
PAD2
VIN
PGND 17
PGND 16
7 BST
LX 15
8 9 10 11 12 13 14
VOUT
Document Number: 65726
S10-1091-Rev. B, 03-May-10
SiC414 (MLP 4 x 4-28L)
www.vishay.com
1
Datasheet pdf - http://www.DataSheet4U.co.kr/


Vishay Intertechnology Electronic Components Datasheet

SIC414 Datasheet

28 V Integrated Buck Regulator

No Preview Available !

SiC414
Vishay Siliconix
PIN CONFIGURATION (TOP VIEW)
FB 1
V5V 2
AGND 3
VOUT 4
VIN 5
VLDO 6
BST 7
28 27 26 25 24 23 22
PAD1
AGND
PAD2
VIN
PAD3
LX
21 LX
20 LX
19 PGND
18 PGND
17 PGND
16 PGND
15 LX
PIN DESCRIPTION
Pin Number
Symbol
1 FB
2
3, 26, P1
4
5, 8 to 11, P2
6
7
12, 15, 20, 21,
24, P3
13, 14, 16 to 19
22
23
25
27
28
V5V
AGND
VOUT
VIN
VLDO
BST
LX
PGND
PGOOD
ILIM
EN/PSV
tON
ENL
Description
Feedback input for switching regulator. Connect to an external resistor divider from output to program the
output voltage.
5 V power input for internal analog circuits and gate drives. Connect to external 5 V supply or configure the
LDO for 5 V and connect to VLDO .
Analog ground.
Output voltage input to the SiC414. Additionally, may be used to bypass LDO to supply VLDO directly.
Input supply voltage.
LDO output.
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Bootstrap pin. A capacitor is connected between BST to LX to develop the floating voltage for the high-side
gate drive.
Switching (Phase) node.
Power ground.
Open-drain power good indicator. High impedance indicates power is good. An external pull-up resistor is
required.
Current limit sense point - to program the current limit connect a resistor from ILIM to LX.
Tri-state pin. Enable input for switching regulator. Connect EN to AGND to disable the switching regulator.
Float pin for forced continuous and pull high for power-save mode.
On-time set input. Set the on-time by a series resistor to the input supply voltage.
Enable input for the LDO. Connect ENL to AGND to disable the LDO.
ORDERING INFORMATION
Part Number
SiC414CD-T1-GE3
SiC414DB
Package
MLPQ44-28
Evaluation board
www.vishay.com
2
Document Number: 65726
S10-1091-Rev. B, 03-May-10
Datasheet pdf - http://www.DataSheet4U.co.kr/


Part Number SIC414
Description 28 V Integrated Buck Regulator
Maker Vishay Siliconix
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SIC414 Datasheet PDF





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