LM22670

現行

具頻率同步的 4.5V 至 42V、3A SIMPLE SWITCHER® 降壓轉換器

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產品規格表

document-pdfAcrobat LM22670/-Q1 42-V, 3-A SIMPLE SWITCHER®, Step-Down Voltage Regulator With Features datasheet (Rev. P) (英文) PDF | HTML

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LMQ66430

現行

具有 1.5-µA IQ 的 36-V、3-A 低 EMI 同步降壓轉換器 Integrated input bypass capacitor and boot cap for lower EMI and smaller footprint, dual-random spread spectrum and lower IQ.

TLVM13630

現行

高密度、3-V 至 36-V 輸入、1-V 至 6-V 輸出、3-A 降壓電源模組 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM22670

現行

產品規格表

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產品詳細資料

Rating

Catalog

Topology

Buck

Iout (max) (A)

Vin (max) (V)

Vin (min) (V)

4.5

Vout (max) (V)

Vout (min) (V)

1.285

Features

Enable, Frequency synchronization, Overcurrent protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

Rating

Catalog

Topology

Buck

Iout (max) (A)

Vin (max) (V)

Vin (min) (V)

4.5

Vout (max) (V)

Vout (min) (V)

1.285

Features

Enable, Frequency synchronization, Overcurrent protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

HSOIC (DDA)

29.4 mm² (4.9 mm × 6 mm)

TO-263 (NDR)

142.3416 mm² (10.16 mm × 14.01 mm)

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
120 mΩ N-channel MOSFET PFM Package
100 mΩ N-channel MOSFET SO PowerPAD-8 Package
Output Voltage Options:
-ADJ (Outputs as Low as 1.285 V)
-5.0 (Output Fixed to 5 V)
±1.5% Feedback Reference Accuracy
500 kHz Default Switching Frequency
Adjustable Switching Frequency and Synchronization
–40°C to 125°C Operating Junction
Temperature Range
Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH^® enabled
LM22670-Q1 is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Operating Junction Temperature)

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
120 mΩ N-channel MOSFET PFM Package
100 mΩ N-channel MOSFET SO PowerPAD-8 Package
Output Voltage Options:
-ADJ (Outputs as Low as 1.285 V)
-5.0 (Output Fixed to 5 V)
±1.5% Feedback Reference Accuracy
500 kHz Default Switching Frequency
Adjustable Switching Frequency and Synchronization
–40°C to 125°C Operating Junction
Temperature Range
Precision Enable Pin
Integrated Boot-Strap Diode
Integrated Soft-Start
Fully WEBENCH^® enabled
LM22670-Q1 is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Operating Junction Temperature)

The LM22670 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42 V N-channel MOSFET switch capable of providing up to 3 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5 V output and adjustable output voltage options are available. The default switching frequency is set at 500 kHz allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22670 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22670 device is a member of Texas Instruments’ SIMPLE SWITCHER^® family. The SIMPLE SWITCHER^® concept provides for an easy to use complete design using a minimum number of external components and the TI WEBENCH^® design tool. TI's WEBENCH^® tool includes features such as external component calculation, electrical simulation, thermal simulation, and build-It boards for easy design-in.

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重要文件	類型	標題	格式選項	日期
*	資料表	LM22670/-Q1 42-V, 3-A SIMPLE SWITCHER®, Step-Down Voltage Regulator With Features datasheet (Rev. P)	PDF \| HTML	2014/10/28
	應用說明	SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B)	PDF \| HTML	2024/10/9
	應用說明	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024/3/25
	類比設計期刊	Control-Mode Quick Reference Guide (Rev. B)	PDF \| HTML	2023/8/29
	選擇指南	Power Management Guide 2018 (Rev. R)		2018/6/25
	技術文章	Quantifying the value of wide VIN	PDF \| HTML	2016/6/15
	技術文章	DC/DC converter datasheets – System losses demystified	PDF \| HTML	2016/4/25
	技術文章	DC/DC converter datasheets – System efficiency demystified	PDF \| HTML	2016/4/18
	技術文章	DC/DC converter datasheets - Quiescent current demystified: Part two	PDF \| HTML	2016/4/11
	應用說明	Know Your Limits		2015/6/2
	應用說明	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		2014/9/12
	應用說明	AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A)		2013/5/6
	應用說明	AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B)		2013/5/6
	應用說明	AN-1797 TO-263 THIN Package (Rev. A)		2013/4/24
	應用說明	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013/4/24
	應用說明	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013/4/23
	應用說明	AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C)		2013/4/23
	應用說明	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		2013/4/23
	應用說明	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		2013/4/23
	應用說明	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		2013/4/23
	應用說明	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013/4/23
	應用說明	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		2013/4/23
	應用說明	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013/4/23
	應用說明	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		2013/4/23
	設計指南	SIMPLE SWITCHER® Design Guide		2011/4/11
	應用說明	Input and Output Capacitor Selection		2005/9/19
	更多文件說明	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005/7/12
	應用說明	AN-643 EMI/RFI Board Design (Rev. B)		2004/5/3

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LM22670EVAL — 具有頻率調整或同步和精密啟用的 LM22670 3A SIMPLE SWITCHER 穩壓器 EVM

The LM22670 evaluation board is designed to demonstrate the capabilities of the LM22670 switching regulator. The LM22670 evaluation board is configured to provide an output voltage of 3.3V up to 3A load current with an input voltage range of 4.5V to 42V. Due to the low R_DS(ON) of the integrated (...)

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LM22670INVEVAL — 具有可調頻率或頻率同步高達 1 MHz 且具有精密啟用功能的 LM22670 反向輸出穩壓器

The LM22670 inverting evaluation board is designed to demonstrate the capabilities of the LM22670 switching regulator in a polarity inverting topology. The LM22670 inverting evaluation board is configured to provide an output of minus 5V (-5V) up to 1.5A load current with an input voltage range of (...)