LM26420 Dual 2 A, high-efficiency synchronous DC/DC converter | TI.com

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Dual 2 A, high-efficiency synchronous DC/DC converter


Recommended alternative parts

  • LM26420-Q1  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 


The LM26420 regulator is a monolithic, high-efficiency dual PWM step-down DC/DC converter. This device has the ability to drive two 2-A loads with an internal 75-mΩ PMOS top switch and an internal 50-mΩ NMOS bottom 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 exceptionally high-frequency conversion over the entire 3-V to 5.5-V input operating range down to the minimum output 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 utilizes current-mode control and internal compensation to provide high performance regulation over a wide range of operating conditions.


  • 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
  • High Switching Frequency: 2.2 MHz (LM26420X)
        0.55 MHz (LM26420Y)
  • 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 With the WEBENCH® Power Designer

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WEBENCH® Designer LM26420

Product Option

  Min   Max Range
Vin1  V 3 to 5.5V
Vout1  V 0.8 to 4.5V
Iout1  A 0 to 2A

Vin2  V 3 to 5.5V
Vout2  V 0.8 to 4.5V
Iout2  A 0 to 2A
Ambient Temp  °C -40 to 125°C


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Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Package Group Rating Type Package size: mm2:W x L (PKG)
LM26420 Order now 3     5.5     0.8     4.5     2     2     550     2200     0.9     Enable
Light Load Efficiency
Phase Interleaving
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Current Mode     98     -40 to 125     HTSSOP | 20
WQFN | 16    
Catalog     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)
16WQFN: 16 mm2: 4 x 4 (WQFN | 16)