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AC/DC & DC/DC converters (integrated FET)

LM26420

ACTIVE

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

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Data sheet

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TPS62442 ACTIVE 2.75-V to 6-V, dual 2-A or 3-A and 1-A step-down converter in QFN package Next generation dual buck with smaller size wand broader VIN range.

LM26420

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 2200 Features Enable, Light Load Efficiency, Light load efficiency, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 900 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 2200 Features Enable, Light Load Efficiency, Light load efficiency, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 900 Duty cycle (max) (%) 98
HTSSOP (PWP) 20 41.6 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) PDF | HTML 13 Apr 2018
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article Design an automotive cluster power supply PDF | HTML 16 Oct 2015
Technical article How to overcome automotive front-end design challenges PDF | HTML 10 Sep 2015
Technical article How to design a quiet and compact industrial power supply PDF | HTML 21 Jul 2015
Technical article Spread Spectrum: Headache tablet or vitamin pill? PDF | HTML 18 May 2015
White paper Power Management IC (PMIC) Guide for Automotive (Rev. A) 29 Oct 2014
EVM User's 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 (...)

User guide: PDF
Not available on TI.com
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 (...)

User guide: PDF
Not available on TI.com
Simulation model

LM26420X PSpice Transient Model

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

LM26420X Unencrypted PSpice Transient Model

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

LM26420Y PSpice Transient Model

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

LM26420Y Unencrypted PSpice Transient Model

SNVMA13.ZIP (5 KB) - PSpice Model
Download
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 (...)
Design guide: PDF
Schematic: PDF
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 (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 20 Ultra Librarian
WQFN (RUM) 16 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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