The Texas Instruments LMR51610YFDBVR is a wide-input, easy-to-use 1A synchronous step-down DC/DC converter with integrated high-side and low-side NMOS switches. It operates from a 4V to 65V input supply and supports up to 1A continuous output current, making it suitable for industrial power conversion from unregulated 12V, 24V, 36V, and 48V rails. TI currently lists the exact orderable device as Active Production.
The exact YF version operates at a fixed 1.1MHz switching frequency in FPWM mode. Unlike the PFM variants, the forced-PWM version maintains constant-frequency operation at light load, providing lower output-voltage ripple, tighter regulation, and a more predictable switching spectrum.
The output is externally adjustable from 0.8V to 28V, using a typical 0.8V feedback reference. The converter supports up to a 98% maximum duty cycle and an approximately 80ns minimum on-time. At VIN = 12V and TJ = 25°C, typical integrated MOSFET on-resistance is approximately 0.7Ω for the high-side FET and 0.36Ω for the low-side FET.
Internal compensation and a fixed 2.3ms soft-start reduce external component requirements. Protection features include cycle-by-cycle current limiting, hiccup-mode short-circuit protection, input undervoltage lockout, and thermal shutdown. The typical high-side peak current-limit threshold for the LMR51610 is approximately 1.6A; this is a protection threshold rather than the continuous load-current rating.
The exact LMR51610YFDBVR is supplied in a 6-pin SOT-23 (DBV) package and is rated for a -40°C to +150°C junction-temperature range. It comes on a 3,000-piece large tape-and-reel, is RoHS compliant, and has an MSL Level 2 rating.
Key Features:
- Manufacturer: Texas Instruments
- Part Number: LMR51610YFDBVR
- Device Type: Synchronous Buck Converter
- Input Voltage: 4V to 65V
- Input Transient Protection: Up to 70V
- Continuous Output Current: 1A
- Adjustable Output Voltage: 0.8V to 28V
- Switching Frequency: 1.1MHz
- Operating Mode: FPWM
- Typical Feedback Reference: 0.8V
- Maximum Duty Cycle: 98%
- Minimum On-Time: 80ns
- Internal Soft Start: Approx. 2.3ms
- High-Side RDS(on): Approx. 0.7Ω Typical
- Low-Side RDS(on): Approx. 0.36Ω Typical
- FPWM Quiescent Current: Approx. 420µA Typical
- Typical High-Side Peak Current Limit: 1.6A
- Cycle-by-Cycle Current Limit
- Hiccup-Mode Short-Circuit Protection
- Input UVLO
- Thermal Shutdown
- Internal Compensation
- Precision Enable
- Junction Temperature: -40°C to +150°C
- Package: SOT-23-6 / DBV
- Packaging: Large Tape & Reel
- Reel Quantity: 3,000 pcs
- MSL: Level 2
- RoHS Compliant
- Product Status: Active Production.
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