Texas Instruments

LM25141 Synchronous Buck Controllers

Texas Instruments offers the LM25141 synchronous buck controllers in a QFN-24 package

Image of Texas Instruments' LM25141 Synchronous Buck ControllersTexas instruments' LM25141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141 features slew rate control to simplify the compliance with EMI requirements.

The LM25141 has two selectable switching frequencies: 2.2 MHz and 440 kHz and gate drivers with slew rate control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

Features
  • -40ºC to +125ºC ambient operating temperature range
  • An AEC-Q100 qualified device is available
  • VIN 3.8 V to 45 V (47 V absolute max)
  • Output: fixed 3.3 V, 5 V, or adjustable from 1.5 V to 15 V with ±0.8% accuracy
  • Fixed 2.2 MHz or 440 kHz switching frequency with ±5% accuracy
  • High-side and low-side gate drive with slew rate control
  • Optional frequency shift by varying an analog voltage or RT resistor
  • Optional synchronization to an external clock
  • Optional spread spectrum
  • Shutdown mode IQ: 10 µA (typ)
  • Low standby mode IQ: 35 µA (typ) 
  • 75 mV current limit threshold with ±0.9% accuracy
  • External resistor or DCR current sensing
  • Output enable logic input
  • Hiccup mode for sustained overload
  • Power good indication output
  • Selectable diode emulation or forced pulse width modulation
  • QFN-24 package with wettable flanks
Applications
  • Medical equipment
  • Industrial programmable logic controllers
  • Industrial PCs
  • Embedded PCs

LM25141 Synchronous Buck Controllers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
LOW VOLTAGE LM5141- SYNC BUCK COLM25141RGETLOW VOLTAGE LM5141- SYNC BUCK CO618 - Immediate$4.90View Details
LOW VOLTAGE LM5141- SYNC BUCK COLM25141QRGETQ1LOW VOLTAGE LM5141- SYNC BUCK CO2098 - Immediate$6.08View Details
AUTOMOTIVE, 2.2MHZ, LOW IQ SYNCHLM25141QRGERQ1AUTOMOTIVE, 2.2MHZ, LOW IQ SYNCH8766 - Immediate$3.61View Details
Published: 2017-06-06

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