1.2V to 14V input voltage, 1A load current, step-up DC-DC


Product details


Vin (Min) (V) 1.2 Vin (Max) (V) 14 Vout (Min) (V) 1.24 Vout (Max) (V) 14 Switch current limit (Typ) (A) 2.85 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 2000 Switching frequency (Max) (kHz) 2000 Iq (Typ) (mA) 0.08 Features Enable Duty cycle (Max) (%) 80 Operating temperature range (C) -40 to 85 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Boost converters (integrated switch)


  • Small VSSOP8 Package (Half the Footprint of
    Standard 8-Pin SOIC Package)
  • 1.09-mm Package Height
  • Up to 2-MHz Switching Frequency
  • 1.2-V to 14-V Input Voltage
  • 1.24-V to 14-V Adjustable Output Voltage
  • Up to 1A Load Current
  • 0.17-Ω Internal MOSFET
  • Up to 90% Regulator Efficiency
  • 80-µA Typical Operating Current
  • < 2.5-µA Specified Supply Current In Shutdown
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The LM2621 is a high efficiency, step-up DC-DC switching regulator for battery-powered and low input voltage systems. It accepts an input voltage between 1.2 V and 14 V and converts it into a regulated output voltage. The output voltage can be adjusted between 1.24 V and 14 V. It has an internal 0.17-Ω N-Channel MOSFET power switch. Efficiencies up to 90% are achievable using the LM2621.

The high switching frequency (adjustable up to 2 MHz) of the LM2621 allows for tiny surface mount inductors and capacitors. Because of the unique constant-duty-cycle gated oscillator topology very high efficiencies are realized over a wide load range. The supply current is reduced to 80 µA because of the BiCMOS process technology. In the shutdown mode, the supply current is less than 2.5 µA.

The LM2621 is available in a VSSOP-8 package. This package uses half the board area of a standard 8-pin SOIC and has a height of just 1.09 mm.

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Technical documentation

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Type Title Date
* Data sheet LM2621 Low Input Voltage, Step-Up DC-DC Converter datasheet (Rev. D) Dec. 03, 2015
More literature Die D/S LM2621 MWC Low Input Voltage, Step-Up Dc-Dc Sep. 20, 2012

Design & development

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Hardware development


Low Input Voltage, Step-Up DC-DC

  • 1MHz Switching frequency minimizes board size
  • 0.1uA shutdown current maximizes battery life
  • Start-up at 1.1V; operational down to 0.65V
  • Step-up or SEPIC applications
  • MSOP-8 package - half the size of 8-Pin SO


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VSSOP (DGK) 8 View options

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