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LT3592IMSE 数据表(PDF) 20 Page - Linear Integrated Systems |
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LT3592IMSE 数据表(HTML) 20 Page - Linear Integrated Systems |
20 / 24 page LT3592 20 3592fc APPLICATIONS INFORMATION Figure 12. Switching Transient When Going from 50mA to 500mA Current and Back in Voltage Mode their maximum voltage capability. If a capacitor with a lower voltage rating is found to not be stable in a design, it will often result in a smaller solution to choose a larger capacitor value of the same voltage rating than to choose one of the same capacitance and higher voltage rating. For example, a 10μF, 10V ceramic capacitor might be smaller than a 4.7μF, 16V part, if a 4.7μF, 10V capacitor is found to not be adequate in a given application. The LT3592HV can tolerate sustained output voltages of up to 25V. For output voltages above 12V, use an external Schottky diode for the boost circuit with the anode tied to CAP and the cathode tied to BOOST (as shown in Figure 13). Transient Performance with Voltage Control Loop The voltage control loop transient characteristics are similar to, but not identical to the current control loop. Figure 12 shows the transient for a 12V input application running at 900kHz with a 6.8μH inductor and a 4.7μF ceramic output capacitor. The LT3592 is in BRIGHT (500mA) mode but the current load is switched from 50mA to 450mA and back, so the current control loop is not active for either current level and the output voltage is regulated through the resistive voltage divider to the FB pin. Other Linear Technology Publications Application Notes AN19, AN35, and AN44 contain more detailed descriptions and design information for Step-down regulators and other switching regulators. The LT1376 data sheet has an extensive discussion of output ripple, loop compensation, and stability testing. Design Note DN100 shows how to generate a bipolar output supply using a Step-down regulator. 10μs/DIV VSW 10V/DIV 3592 F12 VOUT 1V/DIV ILED 200mA/DIV Figure 13. Boost Circuit with External Schottky Diode for Output Voltages Above 12V VIN CAP BOOST GND SW DA BATT LT3592 D2 C3 3592 F13 |
类似零件编号 - LT3592IMSE |
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类似说明 - LT3592IMSE |
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