Datasheet > LM26420

LM26420

更新时间： 2024-11-24 02:58:31

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
44页	1515K
描述
Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Converter

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LM26420, LM26420-Q0, LM26420-Q1

SNVS579J –FEBRUARY 2009–REVISED SEPTEMBER 2015

LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous

DC-DC Converter

1 Features

3 Description

The LM26420 regulator is

a monolithic, high-

•

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

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.

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

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.

Overvoltage Protection

Start-up into Pre-biased Output Loads

Regulators are 180° Out of Phase

LM26420-Q0: AEC-Q100 Grade 0 (Q0) Qualified

(T_J= –40°C to 150°C)

LM26420-Q1: AEC-Q100 Grade 1 (Q1) Qualified

(T_J= –40°C to 125°C)

Device Information⁽¹⁾

PART NUMBER

PACKAGE

HTSSOP (20)

WQFN (16)

BODY SIZE (NOM)

6.50 mm x 4.40 mm

4.00 mm x 4.00 mm

LM26420

•

Compliant with CISPR25 Class 5 Conducted

Emissions

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

2 Applications

space

•

Local 5 V to Vcore of FPGAs

Core Power in HDDs and Set-Top Boxes

USB Powered Devices

Powering Core and I/O Voltages for CPUs and

ASICs

•

Automotive Camera, Infotainment, and Clusters

space

LM26420 Dual Buck DC-DC Converter

LM26420 Efficiency (Up to 93%)

V_IN

3V to 5.5V

VIN

Buck 1

V_OUT1

Buck 2

V_OUT2

2.5V/2A

1.2V/2A

GND

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...44

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LM26420 替代型号

型号	品牌	替代类型	描述	数据表
LM26480-Q1	TI	功能相似	LM26480-Q1 Externally Programmable Dual High-Current Step-Down DC-DC and Dual Linear Regul
LM26400Y	TI	功能相似	LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator
LM26420-Q1	TI	功能相似	LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Con

与LM26420相关器件

型号	品牌	获取价格	描述	数据表
LM26420_15	TI	获取价格	LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Con
LM26420-Q0	TI	获取价格	LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Con
LM26420Q0XMH/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| PWP \| 20 \| -40 to
LM26420Q0XMHX/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| PWP \| 20 \| -40 to
LM26420-Q1	TI	获取价格	LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous DC-DC Con
LM26420Q1XMH/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| PWP \| 20 \| -40 to
LM26420Q1XMHX/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| PWP \| 20 \| -40 to
LM26420Q1XSQ/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| RUM \| 16 \| -40 to
LM26420Q1XSQX/NOPB	TI	获取价格	通过汽车认证的双路 2A 高效同步直流/直流转换器 \| RUM \| 16 \| -40 to
LM26420XMH	NSC	获取价格	Dual 2.0A, High Frequency Synchronous Step-Down DC-DC Regulator

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