Texas Instruments LMR36503/LMR36503-Q1 65V 0.3A Buck Converters
Texas Instruments LMR36503/LMR36503-Q1 65V 0.3A Buck Converters are small 65V, 0.3A synchronous step-down DC/DC converters in a 2mm x 2mm HotRod™ package. This easy-to-use converter can handle input voltage transients up to 70V, provide excellent EMI performance, and support fixed 3.3V, 5V, and other adjustable output voltages.
The Texas Instruments LMR36503/LMR36503-Q1 uses peak current mode control architecture with internal compensation and maintains stable operation with minimal output capacitance. The wide input operating range of the LMR36503-Q1 helps it remain functional during a deep input voltage sag condition, making it an excellent choice for automotive applications withstanding severe cold crank start impulses. The PGOOD flag in the LMR36503/LMR36503-Q1 provides a precise indication of the output voltage status, eliminating the requirement for an external supervisor. A seamless transition from FPWM to PFM, with an ultra-low standby quiescent current, allows the LMR36503/LMR36503-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36503/LMR36503-Q1 to an external clock. With the right resistor selection, the LMR36503-Q1 RT pin variant can be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36503/LMR36503-Q1 is designed to simplify implementation for a wide range of automotive end types of equipment. The LMR36503-Q1 devices are AEC-Q100 qualified for automotive applications.
The PGOOD flag in the LMR36503/LMR36503-Q1 precisely indicates the output voltage status, eliminating the requirement for an external supervisor. A seamless transition from FPWM to PFM, with an ultra-low standby quiescent current, allows the LMR36503/LMR36503-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36503/LMR36503-Q1 to an external clock. With the correct resistor selection, the LMR36503-Q1 RT pin variant can be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36503/LMR36503-Q1 is designed to simplify implementation for various automotive end types of equipment. The LMR36503-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- AEC-Q100-qualified for automotive applications (LMR36503-Q1 only)
- –40°C to +125°C, TA device temperature grade 1
- Functional safety-capable
- Documentation available to aid functional safety system design
- > 70% efficiency at 5mA
- 4µA IQ (switching) at 24VIN to 3.3VOUT (fixed output option)
- Miniature solution size and low component cost
- 2mm × 2mm HotRod™ package with wettable flanks
- Internal compensation
- Designed for automotive applications
- Junction temperature range –40°C to +150°C
- Pseudo-random spread spectrum compatible with CISPR 25 EMI standard
- 3.0V (falling threshold) to 65V wide input voltage range
- Adjustable, 3.3V, and 5V fixed output voltage options available
- Synchronizable with MODE/SYNC pin variant
- 200kHz to 2.2MHz with RT pin variant adjustable FSW
- Pin compatible with LMR36506-Q1 (65V, 600mA)
Applications
- Advanced driver assistance systems (ADAS)
- Body electronics and lighting
- Infotainment and cluster
Datasheets
Functional Block Diagram
Related Products
Texas Instruments LMR36503E-Q1 Step-Down DC-DC Converters
Handles input voltage transients up to 70V and delivers excellent EMI performance.
Texas Instruments LMR36500 Synchronous Buck Converter
Ultra-small, 3V to 65V wide input voltage range available in a 4mm2 HotRod package.
Related Development Tools
Texas Instruments LMR36503EVM Evaluation Module
Allows users to evaluate the LMR36503 wide-input buck converters.
Texas Instruments LMR36503MSCEEVM Evaluation Module
Designed to quickly and easily demonstrate the LMR36503E-Q1 regulator.