Texas Instruments LMR51603/LMR51603-Q1 Synchronous Buck Converters
Texas Instruments LMR51603/LMR51603-Q1 Synchronous Buck Converters drive up to 300mA of load current. The wide-VIN, easy-to-use, synchronous buck converter is designed for various industrial applications for power conditioning from an unregulated source, with a 4V to 65V wide input range.
The TI LMR51603/LMR51603-Q1 converters operate at 400kHz switching frequency to support relatively small inductors for an optimized design dimension. The LMR51603/LMR51603-Q1 converters offer a pulse frequency modulation (PFM version) to achieve high efficiency at light load and forced pulse width modulation (FPWM version) to accomplish constant frequency and small output voltage ripple over the entire load range. Soft-start and compensation circuits are facilitated internally, which allows the device to be used with minimal external components.
The converters include built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation.
The LMR51603-Q1/LMR51603 devices are AEC-Q100 qualified for automotive applications.
Features
- AEC-Q100 qualified for automotive applications with device temperature grade 1 of -40°C to +125°C ambient operating temperature
- Configured for rugged industrial applications
- 4V to 65V input voltage range
- Input transient protection up to 70V
- 300mA continuous output current
- 80ns minimum switching on time
- Fixed 400kHz switching frequency
- -40°C to +150°C junction temperature range
- 96% maximum duty cycle
- Monotonic start-up with pre-biased output
- Short-circuit protection with hiccup mode
- Precision enable
- 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
- Various options in pin-to-pin compatible packages with PFM and forced PWM (FPWM) options
- Pin-to-pin compatible with the LMR16006Y-Q1/LMR16006, LM2842-Q1, LMR50410-Q1/LMR50410, and TPS560430-Q1/TPS560430
- Create a custom design using the LMR51603-Q1 with the WEBENCH® Power Designer
Applications
- Body electronics and lighting
- Infotainment and cluster
- Advanced driver assistance systems (ADAS)
Simplified Schematic
Additional Resources
Associated Evaluation Module
Texas Instruments LMR51603EVM Converter Evaluation Module (EVM)
A fully assembled and tested circuit to help users evaluate and test the LMR51603 converter.
Pin-to-pin compatible
Texas Instruments LMR16006/LMR16006-Q1 Buck Regulators
SIMPLE SWITCHER® PWM DC/DC buck (step-down) regulators with a wide input range of 4V to 60V.
Texas Instruments Reguladores de descenso de tensión CC/CC LM2840/41/42
Incluye un amplio intervalo de entrada desde un conmutador interno de baja resistencia de encendido de 4,5 V a 42 V.
Texas Instruments LMR50410/LMR50410-Q1 Step-Down Converter
A wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1A load current.
Texas Instruments TPS560430/TPS560430-Q1 Buck Regulator
Easy to use synchronous step-down DC-DC converter capable of driving up to 600mA load current.