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LP38513 Datasheet(PDF) 11 Page - Texas Instruments |
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LP38513 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 20 page Load Transient Line Transient VIN VOUT NOM ~89% ~85% VERROR Power -Up Power- Down ~2.25V ~1.25V ~1.25V ~2.50V ~2.50V Load Transient Line Transient VIN VOUT NOM ~89% ~85% VERROR Power- Up Power- Down ~2.25V ~1.25V ~2.50V LP38513 www.ti.com SNVS361C – JULY 2007 – REVISED MARCH 2009 The internal ERROR flag comparator has an open drain output stage. Hence, the ERROR pin requires an external pull-up resistor. The value of the pull-up resistor should be in the range of 2 k Ω to 20 kΩ, and should be connected to the LP38513 output voltage pin. The ERROR Flag pin should not be pulled-up to any voltage source higher than VIN as current flow through an internal parasitic diode may cause unexpected behavior. When the input voltage is less than typically 1.25V the status of the ERROR flag output will not be reliable. The ERROR Flag pin must be connected to ground if this function is not used. The timing diagram in Figure 23 shows the relationship between the ERROR flag and the output voltage when the pull-up resistor is connected to the output voltage pin. The timing diagram in Figure 24 shows the relationship between the ERROR flag and the output voltage when the pull-up resistor is connected to the input voltage. Figure 23. ERROR Flag Operation, see Typical Application Circuit Figure 24. ERROR Flag Operation, biased from VIN Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LP38513 |
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