The LM5149-Q1 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5149-Q1 can be set up in dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.
The LM5149-Q1 has two unique EMI reduction features: active EMI filter and dual random spread spectrum (DRSS). The active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the disturbance. DRSS combines low-frequency triangular and high-frequency randomized modulations to mitigate EMI across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.
Additional features of the LM5149-Q1 include 150°C maximum junction temperature operation, user-selectable diode emulation for lower current consumption at light-load conditions, open-drain power-good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator and bootstrap diode, internal 3-ms soft-start time, and thermal shutdown protection with automatic recovery.
The LM5149-Q1 controller comes in a 3.5-mm × 5.5-mm thermally enhanced, 24-pin VQFN package with wettable flank pins to facilitate optical inspection during manufacturing.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | LM5149-Q1 80-VAutomotive, Synchronous, Buck, DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter datasheet (Rev. C) | PDF | HTML | 08 feb 2023 |
| Application note | How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck | PDF | HTML | 16 ago 2023 | |
| Functional safety information | LM5149-Q1 Functional Safety FIT Rate, FMD, and Pin FMA | PDF | HTML | 18 oct 2022 | |
| User guide | LM25149-Q1 EVM User's Guide (Rev. A) | PDF | HTML | 29 abr 2022 | |
| User guide | LM5149-Q1 Buck Controller Evalulation Module User's Guide | PDF | HTML | 25 feb 2022 | |
| Certificate | LM5149-Q1EVM-400 EU RoHS Declaration of Conformity (DoC) | 09 feb 2022 | ||
| Certificate | LM5149-Q1EVM-2100 EU RoHS Declaration of Conformity (DoC) | 28 dic 2020 |
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El módulo de evaluación (EVM) de alta densidad LM5149‑Q1EVM‑400 está diseñado para mostrar el rendimiento del controlador reductor de CC/CC síncrono de alto rendimiento para automoción LM5149‑Q1. El EVM funciona en un amplio rango de tensión de entrada de 15 V a 72 V para brindar una salida fija de (...)
| Paquete | Pasadores | Descargar |
|---|---|---|
| VQFN (RGY) | 24 | Ver opciones |
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