Product details

Vin (Min) (V) 3 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 4.5 Iout (Max) (A) 2 Iq (Typ) (uA) 900 Switching frequency (Min) (kHz) 550 Switching frequency (Max) (kHz) 2200 Features Enable, Light Load Efficiency, Phase Interleaving, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 2
Vin (Min) (V) 3 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 4.5 Iout (Max) (A) 2 Iq (Typ) (uA) 900 Switching frequency (Min) (kHz) 550 Switching frequency (Max) (kHz) 2200 Features Enable, Light Load Efficiency, Phase Interleaving, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 2
HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 WQFN (RUM) 16 16 mm² 4 x 4
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet LM26420 Dual 2-A, High-Efficiency Synchronous DC/DC Converter datasheet (Rev. L) 13 Apr 2018
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article Design an automotive cluster power supply 16 Oct 2015
Technical article How to overcome automotive front-end design challenges 10 Sep 2015
Technical article How to design a quiet and compact industrial power supply 21 Jul 2015
White paper Power Management IC (PMIC) Guide for Automotive (Rev. A) 29 Oct 2014
User guide AN-1870 LM26420 Evaluation Board (Rev. B) 24 Apr 2013
Application note AN-1973 Benefits and Challenges of High-Frequency Regulators (Rev. A) 23 Apr 2013

Design & development

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

Evaluation board

LM26420XMHEVAL — LM26420 2.2 MHz, eTSSOP Synchronous Buck Evaluation Board

The LM26420 Evaluation board was designed to provide two 2A outputs, VOUT1 and VOUT2 . It is available in either the eTSSOP package option of the LM26420 for easier probing or the LLP version for evaluating the smaller package. The design emphasizes on the compactness of the LM26420 PCB layout and (...)

In stock
Limit: 5
Evaluation board

LM26420XSQEVAL — LM26420 2.2 MHz, LLP Synchronous Buck Evaluation Board

The LM26420 Evaluation board was designed to provide two 2A outputs, VOUT1 and VOUT2 . It is available in either the eTSSOP package option of the LM26420 for easier probing or the LLP version for evaluating the smaller package. The design emphasizes on the compactness of the LM26420 PCB layout and (...)

In stock
Limit: 5
Evaluation board

LM26420YSQEVAL — LM26420 550 kHz, LLP Synchronous Buck Evaluation Board

The LM26420 Evaluation board was designed to provide two 2A outputs, VOUT1 and VOUT2. It is available in either the eTSSOP package option of the LM26420 for easier probing or the LLP version for evaluating the smaller package. The design emphasizes on the compactness of the LM26420 PCB layout and is (...)

Simulation model

LM26420Y Unencrypted PSpice Transient Model

SNVMA13.ZIP (5 KB) - PSpice Model
Simulation model

LM26420Y PSpice Transient Model

SNVMA14.ZIP (140 KB) - PSpice Model
Simulation model

LM26420X Unencrypted PSpice Transient Model

SNVMA15.ZIP (5 KB) - PSpice Model
Simulation model

LM26420X PSpice Transient Model

SNVMA16.ZIP (132 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDM-HAHSCPTO — High Availability High Speed Counter (HSC) and Pulse Train Output (PTO) Reference Design

This reference design provides firmware and test platform for two different industrial input/output functions related to motion control: high-speed counter (HSC) and pulse-train output (PTO). The design is based on a microcontroller platform that is suitable for use in industrial applications where (...)
Reference designs

TIDA-01322 — Low-Dropout (LDO), High-Current, and No-Bias Rail Reference Design for Industrial Applications

This reference design demonstrates a low-noise, low-dropout (LDO), high-current power stage with no voltage-bias-rail requirement utilizing the LP5922 LDO linear regulator. The power stage demonstrated is ideal for industrial applications. Within industrial applications, low-noise power is (...)
Reference designs

PMP9477 — CISPR 25 Class 5 Rated Multi-Output Power Supply with Pre-Boost for Automotive Cluster Unit

The PMP9477 design is a conducted EMI optimized multi-output power supply for automotive cluster units.  The power supply has a pre-boost stage for cold crank and start-stop operation and two buck regulators.  The pre-boost stage features the LM3481 boost controller and will start to (...)
Reference designs

PMP9492 — CISPR 25 Class 5 Multi-Output Power Supply Reference Design for Rear Camera, Automotive ADAS Systems

PMP9492 is a conducted EMI optimized (CISPR 25 Class 5) 9 W Multi output Design for  Wide Range Vin automotive ADAS application that supports Cold –Cranking Conditions . The design uses an LM53603 regulator IC (used as Buck), LM26420 (used as dual Buck) and TPS60150 regulator IC (used as (...)
Reference designs

PMP9462 — Wide Vin Low Noise Triple Output Step Down Converter Reference Design

The reference design PMP9462 is a single input step-down converter with three low-noise outputs. The module uses LM43603, a synchronous step-down DC-DC converter capable of driving up to 3A of load current from an input voltage ranging 7V to 36V. The 5V output from LM43603 enables the LM26420 which (...)
Reference designs

PMP9458 — CISPR 25 Class 5 Rated 14W Multi-Output Power Supply for Automotive Cluster Unit Reference Design

The PMP9458 reference design is a conducted EMI optimized 2-layer board power supply for automotive cluster units. The power supply has two buck regulators in cascaded connection: the first stage buck generates a 5V, 2A output using the LM26003, and the second stage generates two outputs of 2.8V (...)
Package Pins Download
HTSSOP (PWP) 20 View options
WQFN (RUM) 16 View options

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