SI-8005Q |Sanken Electric



Data Sheetdownload (PDF:994.94KB)
Application Notedownload (PDF:1351.81KB)


The SI-8005Q is a buck switching regulator IC with a built-in power MOS.
Due to a current control system, it is applicable to such a super low ESR capacitor as a ceramic capacitor.
It is provided with various protection functions such as overcurrent protection, low input prohibition, overheat protection etc.
In order to protect the IC against in-rush current at start-up, the soft start function is provided.
The soft start time can be set by connecting external capacitors.
A function to turn on/off external signals is also provided and by sending external signal to the EN terminal, the SI-8105Q can be turned on/off.
This device is supplied in the small and thin type HSOP 8-pin package including a heat slug on the backside.
The SI-8105QL is mounted in the DIP 8-pin package for flow mounting /power supply board (single side surface board).


・DVD recorders, FPD-TV
・On-board local power supplies
・OA equipment


・Compact surface-mount(HSOP8) package
・Current mode control
・Output current: 3.5A
・High efficiency: 90% (at TYP, Vo=5V)
・Built-in reference oscillator (500kHz)
・Ceramic capacitors can be used during output
・Built-in drooping-type-overcurrent and thermal protection circuits
・Built-in soft start circuit
・Built-in ON/OFF function (Active Hi))
・Low current consumption during off



Package Name:HSOP8

Package Diagram

Design Support


Built-in PowerYES
Output Voltage0.5V to 24V
Output Current3.5A
Input Voltage Range4.75V to 28V
Operating Frequency500kHz
Current Mode ControlYES
Maximum Input Voltage28V
Minimum Input Voltage4.75V
Output on/offYES
Low ESR Capacitor SupportYES
Overcurrent ProtectionDrooping Type
Phase CompensationExternal
Thermal ProtectionYES

Representative Circuit

Internal Block Diagram

Pin-Out Diagrams

Data Sheetdownload (PDF:994.94KB)
Application Notedownload (PDF:1351.81KB)
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