SI-8001FFE| Datasheet

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SI-8001FFE DC-to-DC Step-Down Converter
Features and Benefits
3.5 A output current supplied in a small, through-hole mount power package High efficiency: 83% at VIN = 15 V, IO = 2.0 A,VO = 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

Description
The SI-8001FFE 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 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-8001FFE 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 PReg Overcurrent Protection SW 2 L1 Di RK-46 (Sanken) Latch and Driver VOUT C2

Reset 5 SS On/Off Soft Start Osc Comparator C3 Error Amplifier

R1

Overtemperature Protection

ADJ

4

R2 Reference Voltage

GND 3

27469.057

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SI-8001FFE DATASHEET