Product details


Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.6 Vout (Max) (V) 16 Iout (Max) (A) 2 Regulated outputs (#) 2 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up Control mode Current Mode Duty cycle (Max) (%) 96 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5 open-in-new Find other Buck converters (integrated switch)


  • 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
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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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LM26420-Q1 ACTIVE Dual 2 A, automotive-qualified, high-efficiency synchronous DC/DC converter 5-Vin, Dual 2-A synchronous buck with power good and enable for each channel.

Technical documentation

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Type Title Date
* Datasheet LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator datasheet (Rev. D) Oct. 13, 2015
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides AN-1600 LM26400Y Demonstration Board (Rev. A) Apr. 24, 2013
Selection guides Power Management Units for Embedded Processors (Rev. G) Jan. 18, 2013
White papers Powering Multi-Rail Systems Using the LM26400Y Regulator Jan. 28, 2008

Design & development

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

Hardware development

document-generic User guide

The DCA1000 evaluation module (EVM) provides real-time data capture and streaming for two- and four-lane low-voltage differential signaling (LVDS) traffic from TI radar-sensor BoosterPack™ EVMs. The data can be streamed out via 1-Gbps Ethernet in real time. The data (...)

  • Supports lab and mobile collection scenarios
  • Captures LVDS data from AWR/IWR radar sensors
  • Streams output in real time through 1-Gbps Ethernet
  • Controlled via onboard switches or GUI/library
document-generic User guide

The LM26400Y demonstration board was designed to provide two 2A outputs at 1.2V and 2.5V respectively. It uses the ETSSOP package option of the LM26400Y for easier probing. The design emphasizes on the compactness of the LM26400Y PCB layout and is thermally optimized. The total solution size is (...)

  • Input voltage range of 3-20V
  • Dual 2A output
  • Output voltage down to 0.6V
  • Internal compensation
  • 500kHz PWM frequency
  • Separate enable pins
  • Separate soft start pins
  • Frequency foldback protection
  • 175mΩ NMOS switch
  • Integrated bootstrap diodes
  • Over-current protection
  • ETSSOP and LLP packages
  • Thermal shutdown

Reference designs

RF Sampling 4-GSPS ADC Reference Design with 8-GHz DC-Coupled Differential Amplifier
TIDA-00431 Wideband radio frequency (RF) receivers allow greatly increased flexibility in radio designs. The wide instantaneous bandwidth allows flexible tuning without changing hardware and the ability to capture multiple channels at widely separated frequencies.

This reference design describes a wideband RF (...)

document-generic Schematic document-generic User guide
50-Ohm 2-GHz Oscilloscope Front-end Reference Design
TIDA-00826 This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
document-generic Schematic document-generic User guide
Synchronization of JESD204B Giga-Sample ADCs using Xilinx Platform for Phased Array Radar Systems
TIDA-00432 This system level design shows how two ADC12J4000 evaluation modules (EVMs) can be synchronized together using a Xilinx VC707 platform. The design document describes the required hardware modifications and device configurations, including the clocking scheme. Example configuration files are shown (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

Ordering & quality

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