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XC66DC2533ML Datasheet(PDF) 6 Page - Torex Semiconductor |
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XC66DC2533ML Datasheet(HTML) 6 Page - Torex Semiconductor |
6 / 11 page XC66D Series 378 3 ■Typical Application Circuits ■Directions for use GNotes on Use 1. In cases where there is no capacitance (CL), or the capacitance is small, or where a capacitor with an extremely low ESR value is used (e.g. ceramic), please use a capacitor (CL = 1.0 µF [Tantalum]) in order to stop oscillation that may occur as the phase margin becomes smaller. 2. To reduce impedance between the power supply and the IC's input pin, which in turn will stop oscillation resulting from input voltage changes, connect a capacitor (CIN = more than 1.0 µF, ESR low) to the input side of the IC. Further, operation may become unstable and oscillation may occur shoud impedance up to the IC's input be high (a state which could be brought about by several factors including which devices are added to the input side, the surrounding wiring and/or the input power supply.) Stability can be improved by regulating increases in input capacitance and by reducing impedance. 3. The regulator's input pin (VIN) and power supply pin are the same. Also, the voltage detector's power supply and the voltage regulator's power supply are the same. Therefore, to have the voltage detector operating normally, it is necessary to apply a voltage larger than the minimum operating voltage (1.5V) to the power supply input pin (VIN). 4. With CMOS output, the detector's output voltage equals the regulator's output voltage following release. Possible changes in the regulator's output voltage (VROUT), following regulator load changes, will be output at the detector's output pin (VDOUT). 5. As the operations of the detector will momentarily respond when steep rise and fall time voltages are input at the power supply pin (VIN), please ensure that the VIN(VDIN) pin's input frequency's rise and fall time is more than 5 µ sec/V. 6. When using with the detector input pin (VDIN) connected to the regulator output pin (VOUT), the detector will momentarily respond as a result of transient output voltage changes brought about by the regulator's load changes. With large load currents and/or large load transitions from 1mA to 80mA for example, output voltage will momentarily drop, so please add a capacitor where CL=more than 4.7mF. CMOS Output (High Level =VOUT) N-ch Open Drain VOUT VIN VSS VDIN VDOUT 1 µF 100k Ω 1 µF VOUT VIN VSS VDIN VDOUT 1 µF 1 µF (Tantalum) (Tantalum) (Tantalum) (Tantalum) 03S_11XC66D 02.9.12 3:09 PM ページ 378 |
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