Product details

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 16 Iout (Max) (A) 2 Iq (Typ) (uA) 4000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up Rating Catalog Regulated outputs (#) 2 Control mode Current Mode Duty cycle (Max) (%) 96
Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 16 Iout (Max) (A) 2 Iq (Typ) (uA) 4000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up Rating Catalog Regulated outputs (#) 2 Control mode Current Mode Duty cycle (Max) (%) 96
HTSSOP (PWP) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Input Voltage Range of 3 V to 20 V
  • Dual 2-A Output
  • Output Voltage Down to 0.6 V
  • Internal Compensation
  • 500-kHz PWM Frequency
  • Separate Enable Pins
  • Separate Soft-Start Pins
  • Frequency Foldback Protection
  • 175-mΩ NMOS Switch
  • Integrated Bootstrap Diodes
  • Overcurrent Protection
  • HTSSOP and WSON Packages
  • Thermal Shutdown
  • Input Voltage Range of 3 V to 20 V
  • Dual 2-A Output
  • Output Voltage Down to 0.6 V
  • Internal Compensation
  • 500-kHz PWM Frequency
  • Separate Enable Pins
  • Separate Soft-Start Pins
  • Frequency Foldback Protection
  • 175-mΩ NMOS Switch
  • Integrated Bootstrap Diodes
  • Overcurrent Protection
  • HTSSOP and WSON Packages
  • Thermal Shutdown

The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use.

The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500 kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs.

Given a nonsynchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turnon and turnoff of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure, and thermal shutdown.

The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use.

The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500 kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs.

Given a nonsynchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turnon and turnoff of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure, and thermal shutdown.

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Technical documentation

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Type Title Date
* Data sheet LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator datasheet (Rev. D) PDF | HTML 13 Oct 2015
User guide LM26400Y Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 20 Dec 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
White paper Powering Multi-Rail Systems Using the LM26400Y Regulator 28 Jan 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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User guide: PDF | HTML
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Simulation tool

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Package Pins Download
HTSSOP (PWP) 16 View options
WSON (NHQ) 16 View options

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