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LM2678S-12 データシート(PDF) 3 Page - Texas Instruments |
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LM2678S-12 データシート(HTML) 3 Page - Texas Instruments |
3 / 36 page Not to scale DAP 1 NC 14 Switch_output 2 Input 13 Switch_output 3 Input 12 Switch_output 4 CB 11 NC 5 NC 10 NC 6 NC 9 GND 7 FB 8 ON/OFF Not to scale 1 Switch_output 2 Input 3 CB 4 GND 5 NC 6 FB 7 ON/OFF Not to scale 3 LM2678 www.ti.com SNVS029J – MARCH 2000 – REVISED JULY 2016 Product Folder Links: LM2678 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions KTW Package 7-Pin TO-263 Top View NDZ Package 7-Pin TO-220 Top View NHM Package 14-Pin VSON Top View DAP connect to pin 9 Pin Functions PIN I/O DESCRIPTION NAME TO-263, TO-220 VSON Switch output 1 12, 13, 14 O Source pin of the internal high-side FET. This is a switching node. Attached this pin to an inductor and the cathode of the external diode. Input 2 2, 3 I Supply input pin to collector pin of high-side FET. Connect to power supply and input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as short as possible. CB 3 4 I Boot-strap capacitor connection for high-side driver. Connect a high-quality 100-nF capacitor from CB to VSW Pin. GND 4 9 — Power ground pins. Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible. FB 6 7 I Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT for ADJ version or connect this pin directly to the output capacitor for a fixed output version. ON/OFF 7 8 I Enable input to the voltage regulator. High = ON and low = OFF. Pull this pin high or float to enable the regulator. NC 5 1, 5, 6, 10, 11 — No connect pins. |
同様の部品番号 - LM2678S-12 |
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同様の説明 - LM2678S-12 |
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