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LM2671M-ADJ 数据表(PDF) 3 Page - Texas Instruments |
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LM2671M-ADJ 数据表(HTML) 3 Page - Texas Instruments |
3 / 36 page Not to scale DAP 1 CB VSW 2 NC VSW 3 NC VIN 4 SS NC 5 NC GND 6 SYNC GND 7 NC NC 8 FB ON/OFF 16 15 14 13 12 11 10 9 Not to scale 1 CB 8 VSW 2 SS 7 VIN 3 SYNC 6 GND 4 FB 5 ON/OFF 3 LM2671 www.ti.com SNVS008L – SEPTEMBER 1998 – REVISED JUNE 2016 Product Folder Links: LM2671 Submit Documentation Feedback Copyright © 1998–2016, Texas Instruments Incorporated 5 Description (continued) Other features include a ensured ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50-μA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions. 6 Pin Configuration and Functions D or P Package 8-Pin SOIC or PDIP Top View NHN Package 16-Pin WSON Top View Connect DAP to pin 11 and 12 Pin Functions PIN I/O DESCRIPTION NAME SOIC, PDIP WSON CB 1 1 I Bootstrap capacitor connection for high-side driver. Connect a high-quality, 100-nF capacitor from CB to VSW Pin. SS 2 4 I Soft-start Pin. Connect a capacitor from this pin to GND to control the output voltage ramp. If the feature not desired, the pin can be left floating. SYNC 3 6 I This input allows control of the switching clock frequency. If left open-circuited the regulator is switched at the internal oscillator frequency, typically 260 kHz. FB 4 8 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 5 9 I Enable input to the voltage regulator. High = ON and low = OFF. Pull this pin high or float to enable the regulator VSW 8 15, 16 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. GND 6 11, 12 — Power ground pins. Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible. VIN 7 14 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. NC — 2, 3, 5, 7, 10, 13 — No connect pins |
类似零件编号 - LM2671M-ADJ |
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类似说明 - LM2671M-ADJ |
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