Details, datasheet, quote on part number: STK730C
DescriptionExternally-excited (MOSFET), Package : Sip
CompanySanyo Semiconductor Corporation
DatasheetDownload STK730C datasheet
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Features, Applications

The is a chopper type step-down dedicated 5 V single output regulator that uses a power MOSFET as its switching element and a Schottky barrier diode (SBD) as its flywheel diode. The STK730C covers the 2 A and higher current regions, regions that are difficult to handle with three terminal step-down regulators. As compared with earlier chopper regulator products that used bipolar transistors, the efficiency of the STK730C has been further improved by the adoption of MOSFET and SBD technologies, and use of the STK730C enables further miniaturization and increased performance in the end product since it corresponds to the adoption of a dedicated switching controller IC. Furthermore, due to the development of a unique MOS drive circuit, the STK730C can be used with a single power supply input. The STK730C can prove useful when standardizing and rationalizing power supply circuit design, since it can handle a wide range of power supply circuits in a number of applications, either as the secondary side regulator in a switching power supply or as the output regulator following AC transformer rectification.


IMST substrate (insulated metal substrate technology) Efficiency improved (by 10%) by the adoption of MOSFET and SBD technology. An auxiliary drive power supply is no longer required due to the development of a unique NMOS FET drive circuit. This means that the STK730C can be used with a single power supply, thus allowing simplification of the input system. Built-in reverse going linear overload characteristic curve overcurrent protection circuit Ground line handling is eased even in multi-output power supply structures due to placement of the overcurrent detection resistor on the plus line. The STK730C's separate excitation oscillator structure provides high stability in the switching frequency. The STK730C's switching operating frequency is set at 125 kHz, which minimizes beating when used in a multiple output structure with STK731 and STK733 type products.


Power supplies in printers and other office equipment Power supplies in robots and other factory automation related equipment Power supplies in VCRs and other consumer products Secondary side regulators in switching power supplies

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Parameter Maximum DC input voltage Maximum output current Thermal resistance Junction temperature Operating case temperature Storage temperature Symbol Vin (DC) max IO max j-c Tj max Tc max Tstg Rating 5 3.5 (SBD 7.2) 150 (SBD to +105 Unit V A °C/W °C

Parameter Output voltage setting Ripple voltage Input regulation Load regulation Overcurrent protection start current Efficiency Operating frequency Output voltage temperature coefficient Symbol VO Vrp Reg-IN Reg-L Iocp f Tcvo Condition Rating min 4.95 typ 5.05 max Unit V mVrms mV/V mV/A A % kHz %/°C

Vin (DC) 1 A Vin (DC) 1 A Vin (DC) 5 A Vin (DC) 24 V Vin (DC) 2.5 A Vin (DC) 1 A

Notes: Do not use pin 7 or pin as an intermediary for any other line or pin. Since pin 5 is grounded to the substrate, the noise level and other characteristics can be adversely affected if the heat sink is connected to the FG or GND lines. If this is a problem either make the heat sink floating or use an insulating sheet.


Some Part number from the same manufacture Sanyo Semiconductor Corporation
STK731B 12 V Signal Output MOS Chopper Regulator
STK732C 15V Single Output MOS Chopper Regulator
STK733C 24 V Signal Output MOS Chopper Regulator
STK733C Externally-excited (MOSFET), Package : Sip
STK73410II Voltage Regulator For TV / VTR Use
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