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LM3150 데이터시트(PDF) 3 Page - Texas Instruments |
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LM3150 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 32 page 1 2 3 4 11 12 13 14 HG VCC 5 6 7 SGND PGND 8 9 SS RON LG EN 10 SW FB SGND ILIM BST VIN EP LM3150 www.ti.com SNVS561F – SEPTEMBER 2008 – REVISED DECEMBER 2014 6 Pin Configuration and Functions HTSSOP PWP 14 PINS Top View Pin Functions PIN I/O DESCRIPTION FUNCTION NAME NO. Supply Voltage for FET Nominally regulated to 5.95 V. Connect a 1.0-µF to 4.7-µF decoupling VCC 1 O Drivers capacitor from this pin to ground. VIN 2 I Input Supply Voltage Supply pin to the device. Nominal input range is 6 V to 42 V. To enable the IC, apply a logic high signal to this pin greater than 1.26-V EN 3 I Enable typical or leave floating. To disable the part, ground the EN pin. Internally connected to the regulation, overvoltage, and short-circuit FB 4 I Feedback comparators. The regulation setting is 0.6 V at this pin. Connect to feedback resistor divider between the output and ground to set the output voltage. Ground for all internal bias and reference circuitry. Should be connected to SGND 5,9 — Signal Ground PGND at a single point. An internal 7.7-µA current source charges an external capacitor to provide the SS 6 I Soft-Start soft-start function. RON 7 I On-time Control An external resistor from VIN to this pin sets the high-side switch on-time. Monitors current through the low-side switch and triggers current limit ILIM 8 I Current Limit operation if the inductor valley current exceeds a user defined value that is set by RLIM and the Sense current, ILIM-TH, sourced out of this pin during operation. Switch pin of controller and high-gate driver lower supply rail. A boost SW 10 O Switch Node capacitor is also connected between this pin and BST pin Gate drive signal to the high-side NMOS switch. The high-side gate driver HG 11 O High-Side Gate Drive voltage is supplied by the differential voltage between the BST pin and SW pin. High-gate driver upper supply rail. Connect a 0.33 to 0.47-µF capacitor from Connection for Bootstrap BST 12 I SW pin to this pin. An internal diode charges the capacitor during the high-side Capacitor switch off-time. Do not connect to an external supply rail. Gate drive signal to the low-side NMOS switch. The low-side gate driver LG 13 O Low-Side Gate Drive voltage is supplied by VCC. Synchronous rectifier MOSFET source connection. Tie to power ground plane. PGND 14 G Power Ground Should be tied to SGND at a single point. Exposed die attach pad should be connected directly to SGND. Also used to EP — — Exposed Pad help dissipate heat out of the IC. Copyright © 2008–2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3150 |
유사한 부품 번호 - LM3150_15 |
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유사한 설명 - LM3150_15 |
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