LMR36503-Q1 Datasheet | Texas Instruments

Features - AEC-Q100-qualified for automotive applications: - Device temperature grade 1: - 40°C to +125°C, TA - Functional Safety-Capable - Documentation available to aid functional safety system design - >70% efficiency at 5 m A - 4 µA IQ (switching) at 24 VIN to 3.3 VOUT (fixed output option) - Miniature solution size and low ponent cost - 2-mm × 2-mm Hot Rod™ package with wettable flanks - Internal pensation - Designed for automotive applications: - Junction temperature range - 40°C to +150°C - Pseudo-random spread spectrum patible with CISPR 25 EMI standard - Wide input voltage range: 3.0 V (falling threshold) to 65 V - Adjustable, 3.3-V and 5-V fixed output voltage options available - Synchronizable with MODE/SYNC pin variant - Adjustable FSW: 200 k Hz to 2.2 MHz with RT pin variant - Pin patible with LMR36506-Q1 (65 V, 600 m A) 2 Applications - Advanced driver assistance systems (ADAS) - Body electronics and lighting - Infotainment and cluster VIN CIN CVCC VIN EN/ UVLO MODE/ SYNC BOOT SW PGOOD FB GND CBOOT LIND VOUT COUT RFBT RFBB Simplified Schematic 3 Description The LMR36503-Q1 is the industry's smallest 65 V, 0.3 A synchronous step-down DC/DC converter in 2-mm x 2-mm Hot Rod™ package. This easy-to-use converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 3.3 V, 5 V and other adjustable output voltages. The LMR36503-Q1 uses peak current mode control architecture with internal pensation 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-Q1 provides 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...