Buck Switching Regulator IC Positive Fixed 5V 1 Output 1A SOT-23-6
The LMR50410Y5FQDBVRQ1 (part of the LMR50410-Q1 family from Texas Instruments) is a synchronous step-down (buck) DC-DC converter designed for automotive and industrial power applications.
It operates over a wide input voltage range of 4 V to 36 V and can deliver up to 1 A output current, making it suitable for converting higher, unregulated voltages into stable lower voltages (e.g., 5 V or 3.3 V rails).
The device integrates power switches, control circuitry, and compensation internally, allowing simple design with minimal external components and a compact PCB footprint.
Key Features
Power & Performance
Wide input voltage range: 4 V to 36 V
Output current: up to 1 A
High switching frequency: 2.1 MHz (enables small inductors)
High efficiency with PFM (light load) and FPWM (constant frequency) options
Integration & Ease of Use
Synchronous rectification (integrated high-side & low-side MOSFETs)
Internal compensation (no complex external tuning)
Minimal external components required
Small SOT-23-6 package for compact designs
Protection & Reliability
Cycle-by-cycle current limit
Short-circuit protection (hiccup mode)
Thermal shutdown protection
Undervoltage lockout (UVLO)
±1% reference voltage accuracy
Automotive & Industrial Capability
AEC-Q100 qualified (automotive grade)
Operating temperature:
Ambient: up to 125°C
Junction: up to 150°C
Designed for rugged automotive environments
Additional Features
Soft-start for controlled startup
Precision enable pin for system control
Monotonic startup with pre-biased output
Available in fixed output (e.g., 5 V) variants
Typical Applications
Automotive electronics (ADAS, infotainment, lighting)
Industrial power supplies
Distributed power systems
General-purpose DC-DC regulation
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