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

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

1000

Features

Enable, Frequency synchronization, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Iq (typ) (µA)

3400

Duty cycle (max) (%)

90

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

4.5

Vin (max) (V)

42

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

1000

Features

Enable, Frequency synchronization, Over Current Protection

Control mode

Voltage mode

Vout (min) (V)

1.285

Vout (max) (V)

37

Iq (typ) (µA)

3400

Duty cycle (max) (%)

90

HSOIC (DDA)

8

29.4 mm² 4.9 x 6

TO-263 (NDR)

7

142.3416 mm² 10.16 x 14.01

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.

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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	類型	標題		日期
*	Data sheet	LM22670/-Q1 42-V, 3-A SIMPLE SWITCHER®, Step-Down Voltage Regulator With Features datasheet (Rev. P)	PDF \| HTML	2014年 10月 28日
	Application note	SIMPLE SWITCHER Regulators Take Over Automotive Applications (Rev. B)	PDF \| HTML	2024年 10月 9日
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024年 3月 25日
	Analog Design Journal	Control-Mode Quick Reference Guide (Rev. B)	PDF \| HTML	2023年 8月 29日
	Selection guide	Power Management Guide 2018 (Rev. R)		2018年 6月 25日
	Technical article	Quantifying the value of wide VIN	PDF \| HTML	2016年 6月 15日
	Technical article	DC/DC converter datasheets – System losses demystified	PDF \| HTML	2016年 4月 25日
	Technical article	DC/DC converter datasheets – System efficiency demystified	PDF \| HTML	2016年 4月 18日
	Technical article	DC/DC converter datasheets - Quiescent current demystified: Part two	PDF \| HTML	2016年 4月 11日
	Application note	Know Your Limits		2015年 6月 2日
	Application note	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		2014年 9月 12日
	Application note	AN-1533 Overvoltage Protection Circuit for Automotive Load Dump (Rev. B)		2013年 5月 6日
	Application note	AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A)		2013年 5月 6日
	Application note	AN-1797 TO-263 THIN Package (Rev. A)		2013年 4月 24日
	Application note	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013年 4月 24日
	Application note	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		2013年 4月 23日
	Application note	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		2013年 4月 23日
	Application note	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		2013年 4月 23日
	Application note	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		2013年 4月 23日
	Application note	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		2013年 4月 23日
	Application note	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013年 4月 23日
	EVM User's guide	AN-1885 LM22670 Evaluation Board (Rev. D)		2013年 4月 23日
	Application note	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013年 4月 23日
	Application note	AN-2020 Thermal Design By Insight, Not Hindsight (Rev. C)		2013年 4月 23日
	Application note	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013年 4月 23日
	EVM User's guide	LM22670 Evaluation Board Inverting Topology and Application Notes (Rev. E)		2013年 4月 23日
	Design guide	SIMPLE SWITCHER® Design Guide		2011年 4月 11日
	Application note	Input and Output Capacitor Selection		2005年 9月 19日
	More literature	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005年 7月 12日
	Application note	AN-643 EMI/RFI Board Design (Rev. B)		2004年 5月 3日

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開發板

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 (...)

使用指南: PDF

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開發板

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 (...)

使用指南: PDF