LM22680-Q1

現行

2A SIMPLE SWITCHER®，啟用精度的降壓電壓穩壓器

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產品規格表

document-pdfAcrobat LM22680/-Q1 42 V, 2 A SIMPLE SWITCHER® Step-Down Voltage Regulator With Features datasheet (Rev. L) (英文) PDF | HTML

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LMR43620-Q1

現行

具有低 IQ 的車用 3-V 至 36-V、2-A、低 EMI 同步降壓穩壓器 Smaller footprint, higher efficiency, lower EMI, lower IQ and spread-spectrum.

LM22680-Q1

現行

產品規格表

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產品詳細資料

Rating

Automotive

Topology

Buck

Iout (max) (A)

2

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

37

Vout (min) (V)

1.285

Features

Enable, Fixed Output, Frequency synchronization, Soft Start Adjustable, UVLO adjustable

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

90

Rating

Automotive

Topology

Buck

Iout (max) (A)

2

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

37

Vout (min) (V)

1.285

Features

Enable, Fixed Output, Frequency synchronization, Soft Start Adjustable, UVLO adjustable

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0034

Duty cycle (max) (%)

90

HSOIC (DDA)

8

29.4 mm² (4.9 mm × 6 mm)

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
200-mΩ N-Channel MOSFET
Output Voltage Option:
-ADJ (Outputs as Low as 1.285 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
Adjustable Soft-Start
Fully WEBENCH^® Enabled
LM22680-Q1 is an Automotive-Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature)
SO PowerPAD™ (Exposed Pad)

Wide Input Voltage Range: 4.5 V to 42 V
Internally Compensated Voltage Mode Control
Stable with Low ESR Ceramic Capacitors
200-mΩ N-Channel MOSFET
Output Voltage Option:
-ADJ (Outputs as Low as 1.285 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
Adjustable Soft-Start
Fully WEBENCH^® Enabled
LM22680-Q1 is an Automotive-Grade Product
that is AEC-Q100 Grade 1 Qualified (–40°C to
+125°C Operating Junction Temperature)
SO PowerPAD™ (Exposed Pad)

The LM22680 switching regulator provides all of the functions necessary to implement an efficient high-oltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 2 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, thus 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 (typical). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22680 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22680 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 LM22680 switching regulator provides all of the functions necessary to implement an efficient high-oltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 2 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, thus 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 (typical). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22680 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22680 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	LM22680/-Q1 42 V, 2 A SIMPLE SWITCHER® Step-Down Voltage Regulator With Features datasheet (Rev. L)	PDF \| HTML	2014/11/5
	應用說明	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024/3/25
	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-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013/4/24
	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-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013/4/23
	應用說明	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		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-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-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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LM22680EVAL — LM22680 - 2A SIMPLE SWITCHER® 降壓穩壓器評估模組

The LM22680 evaluation board is designed to demonstrate the capabilities of the LM22680 switching regulator. The LM22680 is configured to provide an output voltage of 3.3V up to 2A load current with an input voltage range of 4.5V to 42V. Due to the low R_DS(ON) of the integrated N-channel MOSFET and (...)

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