SI-8205NHG |Sanken Electric



Data Sheet
Application Notedownload (PDF:870.24KB)


The SI-8205NHG is a synchronized rectifier type chopper 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. The frequency can be set (300KHz to1MHz) by connecting an external capacitor.
This device is supplied in a compact and thin HOSP 8-pin package with heat slug on the back side.


・Power supply for LCDTV and PDP
・Power supply for laptop PC
・On-board local power supplies
・Power supply for LBP/PPC


・High efficiency: 90%(VIN=14V, VO=5V, IO=1A)
・Reference voltage: 0.5V±1%
・Ceramic capacitor can be used for output
・Externally synchronized frequency type: 300kHz~1MHz
・Output voltage range: 0.5~24V
・Built-in drooping-type-overcurrent and thermal protection circuits



Package Name:HSOP8

Package Diagram

Design Support


Built-in PowerYES
Output Voltage0.5V to 24V
Output Current3A
Input Voltage Range7V to 43V
Operating Frequency250kHZ
Current Mode ControlYES
Maximum Input Voltage46V
Minimum Input Voltage7V
Output on/offYES
Low ESR Capacitor SupportYES
Overcurrent ProtectionDrooping Type
Phase CompensationExternal
Thermal ProtectionYES

Representative Circuit

Internal Block Diagram

Pin-Out Diagrams

Data Sheet
Application Notedownload (PDF:870.24KB)
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