Texas Instruments LM5146RGYR
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | Not applicable |
| Package / Case | 20-VFQFN Exposed Pad |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount, Wettable Flank |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Output Type | Transistor Driver |
| Number of Outputs | 1 |
| Supplier Device Package | 20-VQFN (3.5x4.5) |
| Output Configuration | Positive |
| Function | Step-Down |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) | 5.5V ~ 100V |
| Control Features | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Ramp, Soft Start |
| Frequency - Switching | 100kHz ~ 1MHz |
| Synchronous Rectifier | Yes |
| Serial Interfaces | - |
| Output Phases | 1 |
| Duty Cycle (Max) | 99% |
| Clock Sync | Yes |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | LM5146 |
| Other Names | 296-LM5146RGYRTR |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
LM5146RGYR dual-phase buck controller, high-voltage DC/DC converter
The LM5146RGYR is a high-performance, dual-channel synchronous buck controller from Texas Instruments, designed for high-current, multi-phase power supply applications in industrial, automotive, and telecom systems. This advanced controller operates over a wide 4.5V to 65V input range, supporting output voltages from 0.6V to 55V, making it ideal for 48V intermediate bus architectures, server power modules, and automotive power distribution. The LM5146RGYR features peak-current-mode control with adaptive dead-time optimization, delivering efficiencies up to 98% while minimizing switching losses in high-frequency (up to 2.2MHz) synchronous rectification. Its dual interleaved outputs reduce input ripple current, enabling compact inductor designs for space-constrained applications such as 5G base stations, AI accelerators, and electric vehicle power systems.
The LM5146RGYR integrates comprehensive protection features, including cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and thermal shutdown, ensuring robust operation in demanding environments. The device's programmable soft-start and precision 1% voltage reference enable sequenced power-up and tight output regulation, critical for FPGA, ASIC, and processor power rails. Packaged in a thermally enhanced 20-pin VQFN (RGY), the controller supports external clock synchronization and spread-spectrum modulation to reduce EMI in noise-sensitive applications. Texas Instruments provides detailed application notes and WEBENCH® design tools for multi-phase VRM designs, streamlining development for high-density power supplies and redundant power systems.
Alternative power IC Models
● LM5145RGYR: Single-channel version of LM5146 with identical input/output ranges.
● LM25149Q1RPERQ1: Automotive-grade (AEC-Q100) buck controller with 65V input and 2.2MHz switching.
● LTC3892EUFD: Analog Devices' dual-phase controller with 60V input and 98% efficiency.
● ISL8117AIRZ: Renesas' 60V buck controller with adjustable frequency up to 2MHz.
