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ZXRD060AFK-7 Datasheet(PDF) 2 Page - Diodes Incorporated |
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ZXRD060AFK-7 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 12 page ZXRD060 0.6V DUAL ADJUSTABLE PRECISION SHUNT REGULATOR ZXRD060 Document number: DS35359 Rev. 4 - 2 2 of 12 www.diodes.com August 2011 © Diodes Incorporated A Product Line of Diodes Incorporated Pin Description Pin (DFN) Name Function 1 PGND1 Power Ground 1: Ground return for emitter of output transistor: Connect PGND1/2 and GND together. 2 OUT1 Output 1. Connect a capacitor close to device between OUT1 and GND. See Applications Information section. 3 GND Analog Ground: Ground return for reference and amplifiers: Connect GND and PGND1/2 together. 4 PGND2 Power Ground 2: Ground return for emitter of output transistor: Connect PGND1/2 and GND together. 5 OUT2 Output 2. Connect a capacitor close to device between OUT2 and GND. See Applications Information section. 6 FB2 Feedback Input 2. Regulates to 600mV nominal. 7 IN2 Supply Input 2. Connect a 0.1 μF ceramic capacitor close to the device from IN2 to GND. 8 FB1 Feedback Input 1. Regulates to 600mV nominal. 9 No connection 10 IN1 Supply Input 1. Connect a 0.1 μF ceramic capacitor close to the device from IN1 to GND. Flag Floating or connect to GND Function Block Diagram The ZXRD060 differs from most other shunt regulators in that it has separate input and output pins and a low voltage reference. This enables it to regulate rails down to 600mV and makes the part ideal for isolated power supply applications that use opto-couplers in the feedback loop and where the open-collector output is required to operate down to voltages as low as 200mV. The wide input voltage range of 2V to 18V and output voltage range of 0.2V to 18V enables the ZXRD060 to be powered from an auxiliary rail, while controlling a master rail which is above the auxiliary rail voltage, or below the minimum VIN voltage. This allows it to operate as a low-dropout voltage regulator for microprocessor/DSP/PLD cores. As with other shunt regulators (and shunt references), the ZXRD060 compares its internal amplifier FB pin to a high accuracy internal reference; if FB is below the reference then OUT turns off, but if FB is above the reference then OUT sinks current – up to a maximum of 15mA. |
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