Sanken SI-8008HD Manual

Features and Benefits

▪ 5.5 A output current supplied in a small, surface mount
power package
▪ High efficiency: 83% at 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
Package: TO263-5
Not to scale
V
IN
C1 C4
C3
27469.059
= 15 V, I = 3.0 A,V = 5 V
IN O O

Functional Block Diagram

IN
1
PReg
5 SS
On/Off
Osc
Soft Start
GND
DC-to-DC Step-Down Converter
Description
The SI-8008HD 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
TO-263 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-8008HD 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)
Overcurrent
Protection
Latch and
Reset
Driver
Comparator
Overtemperature
Protection
Error
Amplifier
Reference
Voltage
3
SI-8008HD
V
L1
SW
2
Di Di
C2
FMB-G16L
(Sanken)
R1
4
ADJ
R2
OU