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LM26484 数据表(PDF) 3 Page - Texas Instruments |
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LM26484 数据表(HTML) 3 Page - Texas Instruments |
3 / 25 page LM26484 www.ti.com SNVS573F – SEPTEMBER 2008 – REVISED MARCH 2013 PIN DESCRIPTIONS Pins Name I/O Type(1) Description 1 VIN1 I PWR Power in DC source Buck1 PMOS 2 ENSW1 I D Enable for Buck1 switcher, a logic HIGH enables Buck1 3 FB1 I A Buck1 input feedback terminal 4 AVIN I PWR Analog power for internal circuits 5 FB2 I A Buck2 input feedback terminal 6 ENSW2 I D Enable for Buck2 switcher, a logic HIGH enables Buck2 7 VIN2 I PWR Power in DC source Buck2 PMOS 8 VIN2 I PWR Power in DC source Buck2 PMOS 9 SW2 O A Buck2 switcher output 10 SW2 O A Buck2 switcher output 11 PGND_SW2 G G Buck2 NMOS Power Ground 12 PGND_SW2 G G Buck2 NMOS Power Ground 13 ENLDO I D Enable for LDO, a logic HIGH enables LDO 14 LDOGATE O A LDO Controller output to NMOS power transistor Gate 15 LDOFB I A LDO Controller input to feedback terminal 16 AGND G G Analog GND 17 GND G G Ground 18 nPOR O D nPOR Active low Reset output. nPOR remains LOW while the input supply is below threshold, and goes HIGH after the threshold is reached and timed delay 19 AVDD I PWR Analog Power Pin 20 PGND_SW1 G G Buck1 NMOS Power Ground 21 PGND_SW1 G G Buck1 NMOS Power Ground 22 SW1 O A Buck1 switcher output 23 SW1 O A Buck1 switcher output 24 VIN1 I PWR Power in DC source Buck1 PMOS DAP DAP GND GND Connection isn't necessary for electrical performance, but it is recommended for better thermal dissipation. (1) A: Analog Pin D: Digital Pin G: Ground Pin PWR: Power Pin 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. Table 1. Default Options Orderable Package Ordering Buck1 Buck2 Supplied As Number Marking Specification LM26484SQE 26484SQ NOPB PWM PWM 250 units, tape-and-reel LM26484SQ 26484SQ NOPB PWM PWM 1000 units, tape-and-reel LM26484SQX 26484SQ NOPB PWM PWM 4500 units, tape-and-reel Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM26484 |
类似零件编号 - LM26484_13 |
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类似说明 - LM26484_13 |
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