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CS8120 数据表(PDF) 4 Page - Cherry Semiconductor Corporation |
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CS8120 数据表(HTML) 4 Page - Cherry Semiconductor Corporation |
4 / 8 page Precision Voltage Reference The regulated output voltage depends on the precision band gap voltage reference in the IC. By adding an error amplifier into the feedback loop , the output voltage is maintained within ±4% over temperature and supply variation. Output Stage The composite PNP- NPN output structure (Figure 1) provides 300mA (typ) of output current while maintain- ing a low drop out volt- age (1.00V, typ) and drawing little quiescent current (2.5mA). The NPN pass device prevents deep saturation of the out- put stage which in turn improves the ICÕs efficiency by preventing excess current from being used and dissipated by the IC. Output Stage Protection The output stage is protected against overvoltage, short circuit and thermal runaway conditions (Figure 2). 4 Circuit Description Typical Performance Characteristics: continued Voltage Reference and Output Circuitry VOUT VIN IOUT VOUT VIN Load Dump Short Circuit Thermal Shutdown > 30V Figure 1: Composite Output Stage of the CS8120 5.5 10.0 0.0 Supply Voltage (V) VOUT IQ 5.0 4.0 3.0 2.0 1.0 0.0 22.0 20.0 16.0 12.0 8.0 4.0 0.0 2.0 4.0 6.0 8.0 Output Voltage and Supply Current vs. Input Voltage 2000 1800 1600 1400 1200 1000 800 600 400 200 0 1 5 10 15 20 25 30 35 40 VIN = 5V Reset Output Current (mA) RESET Output Voltage vs. Output Current 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 050 -40 °C 25 °C 125 °C Output Current (mA) VIN = 14V 100 150 200 250 300 350 Quiescent Current vs. Output Current Over Temperature Figure 2: Typical Circuit Waveforms for Output Stage Protection. |
类似零件编号 - CS8120 |
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类似说明 - CS8120 |
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