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Thin SOT23 1A Load Step-Down DC-DC Regulator


Package | PIN: DDC | 6
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.51
10-24 $3.16
25-99 $2.94
100-249 $2.58
250-499 $2.42
500-749 $2.05
750-999 $1.73
1000+ $1.65


  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: -40°C to +125°C,TA
  • Thin SOT-6 Package
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1-A Output Current
  • 550-kHz (LM2734Y) and 1.6-MHz (LM2734X) Switching Frequencies
  • 300-mΩ NMOS Switch
  • 30-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
  • Create a Custom Design Using the LM2734-Q1 With WEBENCH® Power Designer

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Texas Instruments  LM2734XQMKE/NOPB

The LM2734-Q1 regulatoris a monolithic, high-frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. Thedevice provides all the active functions to provide local DC/DC conversion with fast transientresponse and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH, theLM2734-Q1 regulator is easy touse. The ability to drive 1-A loads with an internal 300-mΩ NMOS switch using state-of-the-art0.5-µm BiCMOS technology results in the best power density available. The world-class controlcircuitry allows for on-times as low as 13 ns, thus supporting exceptionally high-frequencyconversion over the entire 3-V to 20-V input operating range down to the minimum output voltage of0.8 V. Switching frequency is internally set to 550 kHz (LM2734Y) or 1.6 MHz (LM2734X), allowingthe use of extremely small surface-mount inductors and chip capacitors. Even though the operatingfrequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown isincluded, featuring an ultra-low standby current of 30 nA.

The LM2734-Q1 regulatoruses current-mode control and internal compensation to provide high-performance regulation over awide range of operating conditions. Additional features include internal soft-start circuitry toreduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltageprotection.