cs5257a-1 ON Semiconductor, cs5257a-1 Datasheet
cs5257a-1
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cs5257a-1 Summary of contents
Page 1
... This circuitry, which includes overcurrent, short circuit, supply sequencing and overtemperature protection will self protect the regulator under all fault conditions. The CS5257A−1 is ideal for generating a secondary 2.0 V − 2.5 V low voltage supply on a motherboard where both 5.0 V and 3.3 V are already available. ...
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... This current will track output current with roughly a 1:100 CONTROL ratio. The minimum value is equal to the quiescent current of the device CONTROL OUT CS5257A− POWER SENSE Adjust 100 mF 0 ...
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... ELECTRICAL CHARACTERISTICS (continued) otherwise specified.) Characteristic CS5257A−1 Short Circuit Current V CONTROL Ripple Rejection (Note 6) V CONTROL V C Thermal Regulation 30 ms Pulse Dropout Voltage V CONTROL POWER (Minimum V − CONTROL OUT POWER (Note 7) V POWER V POWER V POWER V Dropout Voltage V POWER ...
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V POWER V CONTROL BIAS and TSD TYPICAL PERFORMANCE CHARACTERISTICS 0.100 0.075 0.050 0.025 0 −0.025 −0.050 −0.075 −0.100 V = 2.75 V CONTROL V = 2.05 V −0.125 POWER −0.150 ...
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Temperature (°C) Figure 7. Adjust Pin Current vs Temperature 2.05 V POWER ...
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... The output can never come up unregulated. The CS5257A−1 can also be used as a single supply device with the control and power inputs tied together. In this mode, the dropout will be determined by the minimum control voltage ...
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... A 0.1 mF tantalum capacitor is recommended for “first cut” design. Value and type may be varied to optimize performance vs. price. Other Adjustable Operation Considerations The CS5257A−1 linear regulator has an absolute maximum specification of 6.0 V for the voltage difference between V and V . However, the IC may be used to ...
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... The discharge current depends on the value of the capacitor, the output voltage, and the rate at which V the CS5257A−1 regulator, the discharge path is through a large junction and protection diodes are not usually needed. If the regulator is used with large values of output capacitance and the input voltage is instantaneously shorted to ground, damage can occur ...
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... R QJA + R QJC ) R QCS ) R QSA The value for R both the TO−220−5 and D current regulator such as the CS5257A−1 the majority of heat is generated in the power transistor section. The value for R depends on the heat sink type, while the R qSA depends on factors such as package type, heat sink interface (is an insulator and thermal grease used?), and the contact area between the heat sink and the package ...
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PACKAGE DIMENSIONS C −Q− 0.356 (0.014 TO−220−5 T SUFFIX CASE 314D−04 ISSUE E SEATING −T− NOTES: PLANE 1. DIMENSIONING ...
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... Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com PAK−5 Unit 1.4 °C/W 10−50* °C qCA ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. CS5257A−1/D ...