Texas Instruments LMR60460-Q1 Synchronous Buck Converter
Texas Instruments LMR60460-Q1 Synchronous Buck Converter is a 3V to 36V (42V transient), 6A, automotive-grade synchronous buck converter with Zero EMI and Noise (ZEN) 1 switcher technology. The LMR60460-Q1 is available in an ultra-compact 2.5mm × 2mm QFN-9 package with wettable flanks, which help minimize inductance and achieve low EMI performance, facilitating the qualification of automotive and other noise-sensitive designs.
All device variants support adjustable output voltages from 1V to 20V. Each variant can also deliver a fixed output voltage by connecting the output voltage node directly to the feedback pin. The Device Comparison Table provides details on the fixed-output-voltage options. The current-mode control architecture with a 30ns minimum on-time provides high conversion ratios at high frequencies, fast transient response, and excellent load and line regulation.
An open-drain power-good output facilitates power sequencing. The MODE/SYNC pin of the LMR60460-Q1 allows the user to select between forced pulse-width modulation (FPWM), auto mode, or external synchronization mode. The Texas Instruments LMR60460-Q1 is designed to offer reduced output capacitance, leading to compact PCB layout and system cost savings. The LMR60460-Q1 is part of a family of pin-compatible devices that range in current from 0.6A to 6A.
Features
- AEC-Q100 qualified for automotive applications with device temperature grade 1 (–40°C to 125°C ambient operating temperature range)
- Functional safety-capable, with documentation available to aid functional safety system design
- Wide operating input voltage: 3V to 36V (42V absolute maximum)
- Programmable output voltage options available in fixed 1.8V/ADJ, 3.3V/ADJ, 3.8V/ADJ, and 5V/ADJ, and adjustable output voltage range from 1V to 20V
- Ultra-low quiescent current
- Shutdown current: 0.8µA
- No load standby current: 5µA
- Optimized control loop for low output capacitance
- ZEN 1 switcher technology
- Facilitates CISPR 25 class 5 compliance
- Low inductance HotRod™ QFN package
- Advanced spread-spectrum options are available
- Switching frequency from 200kHz to 2.2MHz
- Low minimum on time tON (30ns typical)
- FPWM, PFM, or external frequency synchronization available
- Designed for scalable power supplies and is pin compatible with LMR60406-Q1, LMR60410-Q1, LMR60420-Q1, LMR60430-Q1, LMR60440-Q1, LMR60441-Q1, and LMR60450-Q1
- Power-Good output for power sequencing
Applications
- Automotive camera applications
- Automotive driver assistance systems
- Automotive body applications
Functional Block Diagram
