LM26420

ACTIVE

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

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Product details

Parameters

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) (mA) 0.9 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 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 WQFN (RUM) 16 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • 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

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Description

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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LM26420-Q1 ACTIVE Dual 2 A, automotive-qualified, high-efficiency synchronous DC/DC converter Qualified for automotive.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet LM26420 Dual 2-A, High-Efficiency Synchronous DC/DC Converter datasheet (Rev. L) Apr. 13, 2018
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical articles Design an automotive cluster power supply Oct. 15, 2015
Technical articles How to overcome automotive front-end design challenges Sep. 10, 2015
Technical articles How to design a quiet and compact industrial power supply Jul. 21, 2015
White papers Power Management IC (PMIC) Guide for Automotive (Rev. A) Oct. 29, 2014
User guides AN-1870 LM26420 Evaluation Board (Rev. B) Apr. 24, 2013
Application notes AN-1973 Benefits and Challenges of High-Frequency Regulators (Rev. A) Apr. 23, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Input Voltage: 3V to 5.5V
  • Output Voltages: 1.2 VOUT1 and 2.5 VOUT2
  • Maximum load current: 2A/output
  • Minimum load current: 0A
  • Size: 1.35 in. x 1.6 in.
  • Peak Current Limit: approx= 3.2A at 25°C
  • Nominal Switching Frequency: 2.2 MHz
  • IC package eTSSOP

 

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Input Voltage: 3V to 5.5V
  • Output Voltages: 1.2 VOUT1 and 2.5 VOUT2
  • Maximum load current: 2A/output
  • Minimum load current: 0A
  • Size: 1.35 in. x 1.6 in.
  • Peak Current Limit: approx= 3.2A at 25°C
  • Nominal Switching Frequency: 2.2 MHz
  • IC package LLP

 

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Input Voltage: 3V to 5.5V
  • Output Voltages: 1.2 VOUT1 and 2.5 VOUT2
  • Maximum load current: 2A/output
  • Minimum load current: 0A
  • Size: 1.35 in. x 1.6 in.
  • Peak Current Limit: approx= 3.2A at 25°C
  • Nominal Switching Frequency: 550 kHz
  • IC package LLP

 

Design tools & simulation

SIMULATION MODELS Download
SNVMA13.ZIP (5 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA14.ZIP (140 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA15.ZIP (5 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA16.ZIP (132 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

参考设计 Download
High Availability High Speed Counter (HSC) and Pulse Train Output (PTO) Reference Design
TIDM-HAHSCPTO — This TI design provides a reference solution (firmware and test platform) for two different industrial IO 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 (...)
document-generic Schematic document-generic User guide
参考设计 Download
Low-Dropout (LDO), High-Current, and No-Bias Rail Reference Design for Industrial Applications
TIDA-01322 — TI Design TIDA-01322 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 often (...)
document-generic Schematic document-generic User guide
参考设计 Download
CISPR 25 Class 5 Rated Multi-Output Power Supply with Pre-Boost for Automotive Cluster Unit
PMP9477 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 (...)
document-generic Schematic document-generic User guide
参考设计 Download
CISPR 25 Class 5 Multi-Output Power Supply Reference Design for Rear Camera, Automotive ADAS Systems
PMP9492 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 (...)
document-generic Schematic document-generic User guide
参考设计 Download
Wide Vin Low Noise Triple Output Step Down Converter Reference Design
PMP9462 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 (...)
document-generic Schematic document-generic User guide
参考设计 Download
CISPR 25 Class 5 Rated 14W Multi-Output Power Supply for Automotive Cluster Unit Reference Design
PMP9458 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options
WQFN (RUM) 16 View options

Ordering & quality

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