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Dual 2.0A, High Frequency Synchronous Step-Down DC-DC Regulator


Package | PIN: RUM | 16
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.99
10-24 $2.69
25-99 $2.51
100-249 $2.25
250-499 $2.10
500-749 $1.83
750-999 $1.58
1000+ $1.55


  • Qualified for Automotive Applications
  • AEC Q100-Qualified With the Following Results:
    • Device Temperature Grade 0 (Q0): –40°C to +150°C Ambient OperatingTemperature
    • Device Temperature Grade 1 (Q1): –40°C to +125°C Ambient OperatingTemperature
  • Compliant with CISPR25 Class 5 Conducted Emissions
  • Input Voltage Range of 3 V to 5.5 V
  • Output Voltage Range of 0.8 V to 4.5 V
  • 2-A Output Current per Regulator
  • Fixed 2.2-MHz Switching Frequency
  • 0.8 V, 1.5% Internal Voltage Reference
  • Internal Soft Start
  • Independent Power Good and Precision Enable for Each Output
  • Current Mode, PWM Operation
  • Thermal Shutdown
  • Overvoltage Protection
  • Start-up into Prebiased Output Loads
  • Regulators are 180° Out of Phase
  • Create a Custom Design Using the LM26420-Q1 With the WEBENCH® Power Designer

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Texas Instruments  LM26420Q1XSQX/NOPB

The LM26420-Q1regulator is a monolithic, high-efficiency dual PWM step-down DC/DC converter. This device has theability to drive two 2-A loads with an internal 75-mΩ PMOS top switch and an internal 50-mΩ NMOSbottom switch using state-of-the-art BICMOS technology results in the best power density available.The world-class control circuitry allow on times as low as 30 ns, thus supporting exceptionallyhigh-frequency conversion over the entire 3-V to 5.5-V input operating range down to the minimumoutput voltage of 0.8 V.

Although the operating frequency is high, efficiencies up to 93% are easy to achieve.External shutdown is included, featuring an ultra-low standby current. The LM26420-Q1 utilizes current-modecontrol and internal compensation to provide high performance regulation over a wide range ofoperating conditions.

Because its switching frequency is ensured to be greater than 2 MHz, theLM26420-Q1 can be used in automotive applications without causing interference in the AM frequencyband.