|Datasheet||Download STK740-471 datasheet
3.3V/5A Single Output Separate Excitation Chopper Regulator
The is a separate-excitation step-down chopper regulator hybrid IC for the secondstage circuit and optimal a 3.3V local power supply for use in logic circuit that includes both 5V and 3.3V systems. This IC incorporates in the package all the necessary circuits for a chopper regulator including power switch, error amplifier, soft start, shutdown type output short protection, low-voltage malfunction prevention, on/off, and snubber circuits. Therefore, external components required are input and output capacitors and choke coil only and this allows this to be used to construct a large-current (5A) chopper regulator a 3-pin regulator were used.Applications
3.3V local power supply for the logic circuit where both 5V and 3.3V systems are constructed togeter.Features
Adoption of Sanyo IMST ; Insulated Metal Substrate Technology, allows the circuit to be operated without using a heat sink (see "No Fin Output Current Derating" chart in the page 6). Slim package reduces mounting space. Typical efficiency DC 5V input, 2.5A output. Fine adjustment of output voltage enable. 50 kHz operating frequency. Low-RON resistance power MOSFET adopted. Low-VF Schottky barrier diode adopted.
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This product is listed in a product series due to its property such as output voltage, output current, package, and other similar items. Since some prducts listed in the table below is under development, please refer to your Sanyo sales representative for details.
Type number * : Under planning 10A 5A Input voltage Output voltage Output current 10A 5A Package dimensions (output pins not included) 4.5mm,12pins 8.5mm,12pinsSpecifications
Parameter Operating IC substrate temperature Operating temperature Storage temperature DC input voltage Symbol Tc max Topr Tstg VIN max Pins 6, 11, and 12 Conditions Ratings +115 10 Unit
Parameter Operating IC substrate temperature DC input voltage Load current Symbol Tc VIN Io In the recommended circuit In the recommended circuit Conditions Ratings to 5 Unit V AElectrical Characteristics 25°C, in the specified circuit, VIN = 1A, unless othrwise specified
Parameter Output voltage Load regulation Efficiency Operating frequency Cutoff current On/off circuit Output voltage temperature coefficient Symbol Vo VO fosc ICUT Voff TCVO 6pin, latch mode 5A Io=2.5A Conditions Ratings min 3.2 typ 3.3 max 3.4 50 Unit mV % kHz mA VSUB Low-voltage malfunction prevention circuit Phase compensation
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