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| LMR10530_15 Datasheet, PDF (12/31 Pages) Texas Instruments – SIMPLE SWITCHER 5.5Vin, 3.0A Step-Down Voltage Regulator in WSON-10 | |||
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LMR10530
SNVS814A â JUNE 2012 â REVISED APRIL 2013
www.ti.com
Figure 25. Startup Response to VIN with CFF
Figure 26. Startup Response to VIN with 100µs rise time
FREQUENCY FOLDBACK
The LMR10530 uses frequency foldback to help limit switch current and power dissipation during start-up, short-
circuit and over load conditions by sensing if the feedback voltage is below 0.32V (typical). The LMR10530 will
reduce the switching frequency from the nominal fixed value (1.5MHz or 3.0MHz) down to 400kHz (LMR10530X)
or 800kHz (LMR10530Y) when the feedback voltage drops to 0V. See the Frequency Foldback plot in the Typical
Performance Characteristics section.
12
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