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Regulator ICs
Dual output voltage regulator with power saving
BA51W12ST
The BA51W12ST is a general-purpose, low saturation power supply with two outputs : 9V, 1A and 5V, 500mA. The IC is available in a compact TO220FP-5 package. The outputs can be turned off during the power saving state with the built-in switch. Also built in the IC is an overcurrent protection circuit, an overvoltage protection circuit, and a thermal shutdown circuit. FApplications Car audio systems, VCRs, facsimiles, air conditioners, and other household and industrial equipment FFeatures 1) Minimum I / O voltage differential is 0.5V or less. 2) Built-in protection circuits against overcurrent, overvoltage, and overheat. FAbsolute maximum ratings (Ta = 25_C)
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3) Available in a compact TO220FP-5 package (pins are bendable). 4) Zero power saving current. (Typ.)
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FRecommended operating conditions (Ta = 25_C)
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FBlock diagram
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FPin descriptions
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FInput / output circuits CTL OUT1, 2
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FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 14.0V)
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FMeasurement circuits
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FApplication example
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Regulator ICs
BA51W12ST
FOperation notes ate continuously under transitional conditions (for (1) Although the circuit examples included in this handinstance, if output is clamped at 1VF or higher, short book are highly recommendable for general use, you mode circuit operates at 1VF or lower). Note that the cirshould be thoroughly familiar with circuit characteristics as they relate to your own use conditions. If you intend cuit ability is negatively correlated with temperature. to change the number of external circuits, leave an ample (6) Thermal protection circuit margin, taking into account discrepancies in both static A built-in thermal protection circuit prevents thermal and dynamic characteristics of external parts and Rohm damage to the IC. All outputs are turned off when the cirICs. In addition, please be advised that Rohm cannot cuit operates, and revert to the original state when the provide complet.