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LM25011AMYE Fiches technique(PDF) 3 Page - Texas Instruments |
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LM25011AMYE Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 29 page SW BST FB CS CSG RT VIN PGD SGND SS Exposed Pad on Bottom Connect to Ground 1 2 3 4 5 10 9 8 7 6 LM25011, LM25011-Q1, LM25011A, LM25011A-Q1 www.ti.com SNVS617H – APRIL 2009 – REVISED NOVEMBER 2014 5 Pin Configurations and Functions 10-Pin HVSSOP Package Top View Pin Functions PIN I/O DESCRIPTION APPLICATION INFORMATION NUMBER NAME 1 VIN I Input supply voltage Operating input range is 6 V to 42 V. Transient capability is 45 V. A low ESR capacitor must be placed as close as possible to the VIN and SGND pins. 2 RT I On-time Control An external resistor from VIN to this pin sets the buck switch on- time and the switching frequency. 3 PGD – Power Good Logic output indicates when the voltage at the FB pin has increased to above 95% of the internal reference voltage. Hysteresis is provided. An external pull-up resistor to a voltage less than 7 V is required. 4 SS I Soft-Start An internal current source charges an external capacitor to provide the soft-start function. 5 SGND Signal Ground Ground for all internal circuitry other than the current limit sense circuit. 6 FB I Feedback Internally connected to the regulation comparator. The regulation level is 2.51 V. 7 CSG – Current Sense Ground Ground connection for the current limit sensing circuit. Connect to ground and to the current sense resistor. 8 CS I Current sense Connect to the current sense resistor and the anode of the free- wheeling diode. 9 SW O Switching Node Internally connected to the buck switch source. Connect to the external inductor, cathode of the free-wheeling diode, and bootstrap capacitor. 10 BST I Bootstrap capacitor connection of Connect a 0.1-µF capacitor from SW to this pin. The capacitor is the buck switch gate driver. charged during the buck switch off-time via an internal diode. - EP – Exposed Pad Exposed pad on the underside of the package. This pad should be soldered to the PC board ground plane to aid in heat dissipation. Copyright © 2009–2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM25011 LM25011-Q1 LM25011A LM25011A-Q1 |
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