Texas Instruments LMR51460-Q1 Synchronous Buck Converters

Texas Instruments LMR51460-Q1 Synchronous Buck Converters are wide-V_IN, easy-to-use, synchronous buck converters capable of driving up to 6A load current. The device is designed with a wide input range of 4V to 36V for various industrial applications for power conditioning from an unregulated source. The LMR51460-Q1 features an adjustable switching frequency from 200kHz to 1MHz with an external resistor, which provides the flexibility to optimize efficiency or external component size. The device has forced pulse width modulation (FPWM version) to achieve constant frequency and small output voltage ripple over the entire load range and pulse frequency modulation (PFM version) to realize high efficiency at light load. Compensation circuits and soft-start are implemented internally, which allows the device to be used with minimum external components.

It has built-in protection features, such as hiccup mode short-circuit protection, cycle-by-cycle current limit, and thermal shutdown in case of excessive power dissipation. The Texas Instruments LMR51460-Q1 is available in a WSON-12 package.

Applications

Automotive ADAS and body electronics
Automotive infotainment and cluster (head unit, media hub, USB charge, display)

Features

Supports automotive system requirements
- 4V to 36V wide input voltage range
- 6A continuous output current
- ±1.0% tolerance voltage reference at room temperature
- Minimum switching-on time of 75ns (typical)
- 25µA low quiescent current
- Adjustable frequency of 200kHz to 1MHz
- Frequency spread spectrum
- Protection features
  - Precision enable input
  - Open-drain PGOOD
  - V_IN undervoltage lockout (UVLO)
  - Cycle-by-cycle current limiting
  - Short-circuit protection with hiccup mode
  - Thermal shutdown

AEC-Q100 qualified for automotive applications
- Device temperature grade 1 (–40°C to +125°C ambient operating temperature)
Functional safety-capable
- Documentation available to aid functional safety system design
Small design size and ease of use
- Integrated synchronous rectification
- Internal compensation for ease of use
WSON-12 package
PFM and FPWM options in pin-to-pin compatible package