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LM27313 Datasheet(PDF) 10 Page - Texas Instruments |
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LM27313 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 25 page LM27313 SW FB GND VIN SHDN U1 R3 51k SHDN GND 5 VIN C1 2.2 2F R2 13.3k CF 220 pF D1 MBR0520 R1/117k L1/10 2H C2 4.7 2F 12V OUT 260 mA (TYP) LM27313, LM27313-Q1 SNVS487E – DECEMBER 2006 – REVISED JANUARY 2015 www.ti.com 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The device operates with input voltage in the range of 2.7 V to 14 V and provides regulated output voltage. This device is optimized for high-efficiency operation with minimum number of external components. Also, high switching frequency allows use of small surface mount components, enabling very small solution size. For component selection, refer to Detailed Design Procedure. 8.2 Typical Applications 8.2.1 Application Circuit VIN=5.0 V, VOUT=12.0 V, Iload=250 mA Figure 12. Typical Application Circuit Figure 13. Efficiency vs. Load Current 8.2.1.1 Design Requirements The device must be able to operate at any voltage within input voltage range. Load Current must be defined in order to properly size the inductor, input and output capacitors. The inductor should be able to handle full expected load current as well as the peak current generated during load transients and start up. Inrush current at startup will depend on the output capacitor selection. More details are provided in Detailed Design Procedure. Device has a shutdown pin (SHDN) that is used to enable and disable device. This pin is active low and should be tied to VIN if not used in application. 10 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: LM27313 LM27313-Q1 |
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