SI-8008HFE
DC-to-DC Step-Down Converter
Features and Benefits
Description
▪ 5.5 A output current supplied in a small, through-hole
mount power package
▪ High efficiency: 83% at VIN = 15 V, IO = 3.0 A,VO = 5 V
▪ Requires only seven external components (optional soft
start requires an additional capacitor)
▪ Oscillation circuit built-in (frequency 150 kHz typical)
▪ Constant-current mode overcurrent protection circuit and
overtemperature protection circuit built-in
▪ Soft start function built-in (can be implemented as an
on/off function; output-off state at low level)
▪ Low current consumption during output-off state
The SI-8008HFE DC voltage regulator is a DC-to-DC buck
convertor that attains an oscillation frequency of 150 kHz,
and has an integrated miniaturized choke coil, allowing it to
serve as a small, high efficiency power supply in a compact
TO220F package.
The internal switching regulator function provides high
efficiency switching regulation without any need for adjustment.
The device requires only six external support components. The
optional soft start function requires an additional capacitor.
Optional on/off control can be performed using a transistor.
The SI-8008HFE includes overcurrent and overtemperature
protection circuits.
Applications include:
▪ DVD recorder
▪ FPD TV
▪ Telecommunications equipment
▪ Office automation equipment, such as printers
▪ On-board local power supply
▪ Output voltage regulator for second stage of SMPS
(switched mode power supply)
Package: TO220F-5
Not to scale
Functional Block Diagram
VIN
1 IN
C1
SW
PReg
C4
On/Off
Soft Start
Latch and
Driver
C2
R1
Osc
Comparator
C3
Overtemperature
Protection
Error
Amplifier
ADJ
4
R2
Reference
Voltage
GND
3
27469.060
VOU
L1
Di
FMB-G16L
(Sanken)
Overcurrent
Protection
Reset
5 SS
2
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
