SI-8001FDE Datasheet, PDF (1/9 Pages) Sanken electric – DC-to-DC Step-Down Converter

SI-8001FDE
DC-to-DC Step-Down Converter
Features and Benefits
▪ 3.5 A output current supplied in a small, surface mount
power package
▪ High efficiency: 83% at V_IN = 15 V, I_O = 2.0 A,V_O = 5 V
▪ Requires only six external components (optional soft
start requires an additional capacitor)
▪ Oscillation circuit built-in (frequency 300 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
Description
The SI-8001FDE DC voltage regulator is a DC-to-DC buck
convertor that attains an oscillation frequency of 300 kHz,
and has an integrated miniaturized choke coil, allowing it to
serve as a small, high efficiency power supply in a compact
TO263 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-8001FDE 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)
Not to scale
Functional Block Diagram
V_IN
1 IN
C1
PReg
Overcurrent
Protection
SW 2
L1
Di
SPB-G56S
(Sanken)
V_OUT
C2
Reset
Latch and
Driver
R1
5 SS
On/Off
Soft Start
C3
Osc
Comparator
Overtemperature ^{ADJ 4}
Protection
Error
Amplifier
R2
GND
3
Reference
Voltage
27469.056
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/