LM5146QRGYTQ1
| Parameters | |
|---|---|
| Factory Lead Time | 6 Weeks |
| Mounting Type | Surface Mount, Wettable Flank |
| Package / Case | 20-VFQFN Exposed Pad |
| Surface Mount | YES |
| Operating Temperature | -40°C~125°C TA |
| Packaging | Tape & Reel (TR) |
| Series | Automotive, AEC-Q100 |
| JESD-609 Code | e3 |
| Pbfree Code | yes |
| Part Status | Active |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| Number of Terminations | 20 |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Position | QUAD |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Reach Compliance Code | compliant |
| Base Part Number | LM5146 |
| JESD-30 Code | R-PQCC-N20 |
| Function | Step-Down |
| Number of Outputs | 1 |
| Output Type | Adjustable |
| Input Voltage-Nom | 48V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Output Configuration | Positive |
| Voltage - Supply (Vcc/Vdd) | 5.5V~100V |
| Control Features | Enable, Frequency Control, Power Good, Soft Start |
| Input Voltage (Min) | 5.5V |
| Topology | Buck |
| Control Mode | VOLTAGE-MODE |
| Frequency - Switching | 100kHz~1MHz |
| Control Technique | PULSE WIDTH MODULATION |
| Synchronous Rectifier | Yes |
| Duty Cycle (Max) | 99% |
| Length | 4.5mm |
| Width | 3.5mm |
| RoHS Status | RoHS Compliant |
Description
The LM5146QRGYTQ1 100-V synchronous buck controller regulates either a high input voltage source or a high voltage transient-prone input rail, reducing the need for external surge suppression components.
Large step-down ratios are enabled by a high-side switch minimum on-time of 40 ns, allowing direct step-down conversion from a 48-V nominal input to low-voltage rails for decreased system complexity and solution cost.
The LM5146QRGYTQ1 operates at approximately 100 percent duty cycle with input voltage dips as low as 5.5 V, making it a great choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU), and HEV/EV systems.
Features
? 7.5-V gate drivers for standard VTH MOSFETs
– 14-ns adaptive dead-time control
– 2.3-A source and 3.5-A sink capability
? Inherent protection features for robust design
– Adjustable output voltage soft start
– Hiccup-mode overcurrent protection
– Input UVLO with hysteresis
– VCC and gate-drive UVLO protection
– Precision enable input and open-drain PGOOD indicator for sequencing and control
– Thermal shutdown protection with hysteresis
? 20-pin VQFN package with wettable flanks
? Create a custom design using the LM5146-Q1 with WEBENCH? Power Designer
? AEC-Q100 qualified for automotive applications:
– Device temperature grade 1: –40°C to +125°C ambient temperature range
? Functional Safety-Capable
– Documentation available to aid functional safety system design
? Versatile synchronous buck DC/DC controller
– Wide input voltage range of 5.5 V to 100 V
– 150°C maximum junction temperature
– 0.8-V reference with ±1% feedback accuracy
– Adjustable output voltage from 0.8 V to 60 V
– 40-ns tON(min) for high VIN / VOUT ratio
– 140-ns tOFF(min) for low dropout
– Lossless RDS(on) or shunt current sensing
– Optimized for CISPR 25 Class 5 requirements
? Switching frequency from 100 kHz to 1 MHz
– SYNC In and SYNC Out capability
– Selectable diode emulation or FPWM
Applications
? HEV/EV powertrain systems
? Body electronics and lighting
? Infotainment and cluster
? High-power automotive DC/DC regulator
? Automotive motor drives, ADAS