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CS8101YDWF20 Datasheet(PDF) 3 Page - Cherry Semiconductor Corporation |
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CS8101YDWF20 Datasheet(HTML) 3 Page - Cherry Semiconductor Corporation |
3 / 8 page Output Stage Protection The output stage is protected against overvoltage, short circuit and thermal runaway conditions (Figure 1). Figure 1. Typical Circuit Waveforms for Output Stage Protection. If the input voltage rises above 30V (e.g. load dump), the out- put shuts down. This response protects the internal circuitry and enables the IC to survive unexpected voltage transients. Should the junction temperature of the power device exceed 180ûC (typ) the load current capability is reduced thereby preventing thermal overload. This thermal management function is an effective means to prevent die overheating since the load current is the principle heat source in the IC. The CS8101 contains two microprocessor compatible con- trol functions: and (Figure 2). Figure 2. Circuit Waveform Function The function switches the output transistor ON and OFF. When the voltage on the lead exceeds 1.4V typ, the output pass transistor turns off, leaving a high impedance facing the load. The IC will remain in Sleep mode, drawing only 50µA, until the voltage on this input drops below the threshold. Function A signal (low voltage) is generated as the IC pow- ers up until VOUT is within 250mV of the regulated output voltage, or when VOUT drops out of regulation,and is lower than 300mV below the regulated output voltage. A hysteresis of 50mV is included in the function to minimize oscillations. The output is an open collector NPN transistor, controlled by a low voltage detection circuit. The circuit is functionally independent of the rest of the IC thereby guaranteeing that the signal is valid for VOUT as low as 1V. RESET RESET RESET RESET ENABLE ENABLE ENABLE ENABLE (1) = NO RESET DELAY CAPACITOR (2) = WITH RESET DELAY CAPACITOR FOR 7V < VIN < 26V VOUT VRH ENABLE VRL (1) (2) VIN VIN H VR PEAK VRLO VR PEAK RESET RESET ENABLE Regulator Control Functions IOUT VOUT VIN Load Dump Short Circuit Current Limit > 30V Voltage Reference and Output Circuitry 3 Package Lead Description PACKAGE LEAD # LEAD SYMBOL FUNCTION Circuit Description 8 Lead 20 Lead SOIC 5 Lead SOIC (Internally Fused Leads) TO-220 819 5 VIN Input voltage. 120 1 VOUT 5V, ±2%, 100mA output. 3 1 2 Logic level switches output off when toggled HIGH. 4 4,5,6,7 3 Gnd Ground. All Gnd leads must be connected to Ground. 14,15,16,17 5 10 4 Active reset (accurate to VOUT ³ 1V). 2VOUTSense Kelvin connection which allows remote sensing of out- put voltage for improved regulation. If remote sensing is not required, connect to VOUT. 6,7 2,3,8,9,11,12,13,18 NC No Connection. RESET ENABLE |
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Similar Description - CS8101YDWF20 |
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