LMR36503MSC5RPERQ1

LMR36503-Q1 is an ultra-compact 65V, 0.3A synchronous step-down DC/DC converter in a 2mm x 2mm HotRod package. This easy-to-use converter handles input voltage transients up to 70V, delivers excellent EMI performance, and supports fixed 3.3V, 5V, and other adjustable output voltages. LMR36503-Q1 employs a peak current mode control architecture with internal compensation to maintain stable operation and minimize output capacitance. The wide input operating voltage range enables normal operation under deep input voltage dropout conditions, making it an ideal choice for automotive applications subject to severe cold-crank pulses. The PGOOD flag in LMR36503-Q1 provides accurate output voltage status indication, eliminating the need for external monitors. Seamless transition from FPWM to PFM and ultra-low standby quiescent current allow LMR36503-Q1 to support higher system efficiency at light output loads. The MODE/SYNC pin variant facilitates synchronization of LMR36503-Q1 to an external clock. The LMR36503-Q1 RT pin variant offers a selection of appropriate resistors and supports external programming of the desired switching frequency. The comprehensive feature set of LMR36503-Q1 is designed to simplify implementation across a wide range of automotive end equipment.

Applications

• Advanced Driver Assistance Systems (ADAS)
• Body Electronics and Lighting
• Infotainment Systems and Instrument Clusters

Key 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
• Efficiency greater than 70% at 5mA
• 4μA IQ (switching) at VIN = 24V and VOUT = 3.3V (fixed output option)
• Tiny 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 for CISPR 25 EMI compliance
• Wide input voltage range: 3.0V (dropout threshold) to 65V
• Adjustable, 3.3V, and 5V fixed output voltage options
• Synchronizable with MODE/SYNC pin variants
• Adjustable FSW: 200kHz to 2.2MHz (with RT pin variants)
• Pin-compatible with LMR36506-Q1 (65V, 600mA)