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LM3280 bảng dữ liệu(PDF) 2 Page - Texas Instruments |
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LM3280 bảng dữ liệu(HTML) 2 Page - Texas Instruments |
2 / 27 page 4 3 2 1 A B C D ENBUCK BYP SW PVIN SVIN VCON ENLDO2 LDO2 LDO1 ENLDO1 LDO3 FB BYPOUT SGND ENLDO3 PGND Top View LM3280 SNOSAU4B – OCTOBER 2006 – REVISED FEBRUARY 2013 www.ti.com Connection Diagrams Figure 2. 16–Bump DSBGA Package, Large Bump See Package Number YZR0016QQA Pin Descriptions Pin # Name Description A1 LDO1 LDO1 Output. B1 LDO2 LDO2 Output. C1 LDO3 LDO3 Output. D1 ENLDO3 LDO3 Enable Input. Set this digital input high to turn on LDO3. (ENBUCK pin must be also set high.) For turning LDO3 off, set low. A2 SVIN Analog, Signal, and LDO Supply Input. B2 FB Buck Converter Feedback Analog Input. Connect to the output at the output filter capacitor. C2 ENLDO2 LDO2 Enable Input. Set this digital input high to turn on LDO2. (ENBUCK pin must be also set high.) For turning LDO2 off, set low. D2 VCON Buck Converter Voltage Control Analog Input. This pin controls VOUT in PWM mode. Set: VOUT = 3 x VCON. Do not leave floating. A3 SGND Analog, Signal, and LDO Ground. B3 ENBUCK Buck Converter Enable Input. Set this digital input high after Vin >2.7V for normal operation. For shutdown, set low. C3 ENLDO1 LDO1 Enable Input. Set this digital input high to turn on LDO1. (ENBUCK pin must be also set high.) For turning LDO1 off, set low. D3 BYP Forced Bypass Input. Use this digital input to command operation in Bypass mode. Set BYP low (<0.4V) for normal operation. A4 BYPOUT Bypass FET Drain. Connect to the output capacitor. Do not leave floating. B4 PVIN Buck Converter Power Supply Voltage Input to the internal PFET switch and Bypass FET. C4 SW Buck Converter Switch Node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an inductor with a saturation current rating that exceeds the maximum Switch Peak Current Limit of the PWM Buck Converter. D4 PGND Buck Converter Power Ground. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 2 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LM3280 |
Số phần tương tự - LM3280_15 |
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Mô tả tương tự - LM3280_15 |
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