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MC33160 数据表(PDF) 5 Page - ON Semiconductor |
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MC33160 数据表(HTML) 5 Page - ON Semiconductor |
5 / 10 page MC34160, MC33160 http://onsemi.com 5 PIN FUNCTION DESCRIPTION Pin Function Description 1 Comparator Inverting Input This is the Uncommitted Comparator Inverting input. It is typically connected to a resistor divider to monitor a voltage. 2 Comparator Noninverting Input This is the Uncommitted Comparator Noninverting input. It is typically connected to a reference voltage. 3 N.C. No connection. This pin is not internally connected. 4, 5, 12, 13 GND These pins are the control circuit grounds and are connected to the source and load ground returns. They are part of the IC lead frame and can be used for heatsinking. 6 Comparator Output This is the Uncommitted Comparator output. It is an open collector sink−only output requiring a pullup resistor. 7 Reset This is the Reset Comparator output. It is an open collector sink−only output requiring a pullup resistor. 8 Power Warning This is the Power Warning Comparator output. It is an open collector sink−only output requiring a pullup resistor. 9 Power Sense This is the Power Warning Comparator noninverting input. It is typically connected to a resistor divider to monitor the input power source voltage. 10 Hysteresis Adjust The Power Warning Comparator hysteresis is programmed by a resistor connected from this pin to ground. 11 Regulator Output This is the 5.0 V Regulator output. 14 VCC This pin is the positive supply input of the control IC. 15 Chip Disable This input is used to switch the IC into a standby mode turning off all outputs. 16 Vref This is the 2.6 V Reference output. It is intended to be used in conjunction with the Power Warning and Uncommitted comparators. OPERATING DESCRIPTION The MC34160 series is a monolithic voltage regulator and supervisory circuit containing many of the necessary monitoring functions required in microprocessor based systems. It is specifically designed for appliance and industrial applications, offering the designer a cost effective solution with minimal external components. These devices are specified for operation over an input voltage of 7.0 V to 40 V, and with a junction temperature of −40 ° to +150°C. A typical microprocessor application is shown in Figure 11. Regulator The 5.0 V regulator is designed to source in excess of 100 mA output current and is short circuit protected. The output has a guaranteed tolerance of ±5.0% over line, load, and temperature. Internal thermal shutdown circuitry is included to limit the maximum junction temperature to a safe level. When activated, typically at 170 °C, the regulator output turns off. In specific situations a combination of input and output bypass capacitors may be required for regulator stability. If the regulator is located an appreciable distance ( ≥ 4″) from the supply filter, an input bypass capacitor (Cin) of 0.33 mF or greater is suggested. Output capacitance values of less than 5.0 nF may cause regulator instability at light load ( ≤ 1.0 mA) and cold temperature. An output bypass capacitor of 0.1 mF or greater is recommended to ensure stability under all load conditions. The capacitors selected must provide good high frequency characteristics. Good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator does not have external sense inputs. Reference The 2.6 V bandgap reference is short circuit protected and has a guaranteed output tolerance of ±5.0% over line, load, and temperature. It is intended to be used in conjunction with the Power Warning and Uncommitted comparator. The reference can source in excess of 2.0 mA and sink a maximum of 10 mA. For additional current sinking capability, an external load resistor to ground must be used. Reference biasing is internally derived from either VCC or VO, allowing proper operation if either drops below nominal. Chip Disable This input is used to switch the IC into a standby mode. When activated, internal biasing for the entire die is removed causing all outputs to turn off. This reduces the power supply current (ICC) to less than 0.3 mA. |
类似零件编号 - MC33160 |
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类似说明 - MC33160 |
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