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Automotive, 2.2MHz, Low Iq Synchronous Buck Controller With Frequency Spread Spectrum


Package | PIN: RGE | 24
Temp: S (-40 to 150)
Carrier: Cut Tape
Qty Price
1-9 $4.94
10-24 $4.45
25-99 $4.14
100-249 $3.63
250-499 $3.40
500-749 $2.89
750-999 $2.44
1000+ $2.33


  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient OperatingTemperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESDClassification Level C4B
  • VIN 3.8 V to 42 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V With ±0.8% Accuracy
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Meets CISPR 25 / EN 55025 EMI Standards
    • Fixed 2.2-MHz or 440-kHz Switching Frequency With ±5%Accuracy
    • High-Side and Low-Side Gate Drive With Slew RateControl
    • Optional SpreadSpectrum
  • Optional Synchronization to an External Clock
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 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 PWM
  • VQFN-24 Package With Wettable Flanks
  • Create a Custom Design Using the LM25141-Q1 With the WEBENCH® Power Designer

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Texas Instruments  LM25141QRGETQ1

The LM25141-Q1 is a synchronous buck controller, intended for high-voltage,wide-VIN, step-down regulator applications. The control method is peakcurrent-mode control. Current-mode control provides inherent line feed-forward, cycle-by-cyclecurrent limiting, and ease of loop compensation. The LM25141-Q1 features slew rate control tosimplify the compliance with CISPR and automotive EMI requirements.

The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gatedrivers with slew rate control can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improvedlow power efficiency. The LM25141-Q1 has a high-voltage bias regulator with automatic switch-overto an external bias to reduce the IQ current fromVIN. Additional features include frequency synchronization, cycle-by-cyclecurrent limit, hiccup-mode fault protection for sustained overload, and power-good output.