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LM2670SX-ADJ Arkusz danych(PDF) 3 Page - Texas Instruments |
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LM2670SX-ADJ Arkusz danych(HTML) 3 Page - Texas Instruments |
3 / 38 page Not to scale DAP 1 NC 14 Switch_output 2 Input 13 Switch_output 3 Input 12 Switch_output 4 CBOOST/CB 11 NC 5 NC 10 NC 6 SYNC 9 GND 7 Feedback/FB 8 ON/OFF Not to scale Thermal Pad 1 Switch_output 2 Input 3 CBOOST/CB 4 GND 5 SYNC 6 Feedback/FB 7 ON/OFF Not to scale 3 LM2670 www.ti.com SNVS036K – APRIL 2000 – REVISED JUNE 2016 Product Folder Links: LM2670 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 Connect DAP to pin 9 on PCB 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. CBOOST/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. SYNC 5 6 I Synchronization pin. Use this pin to synchronize the frequency to an external clock. The external frequency must be higher than the LM2670 internal oscillation frequency. Feedback/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 — 1, 5, 10, 11 — No connect pins |
Podobny numer części - LM2670SX-ADJ |
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Podobny opis - LM2670SX-ADJ |
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