LM3691

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用于便携式应用的高准确度、微型 1A、降压 DC-DC 转换器

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数据表

document-pdfAcrobat LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications 数据表 (Rev. J) (英语) PDF | HTML

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TPS62860

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具有 I2C/VSEL 接口的1.75V 至5.5V、0.6A 超低 IQ 降压转换器 Smaller solution size and low quiescent current with I2C/VSEL interface

LM3691

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数据表

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产品详情

Iout (max) (A)

1

Vin (min) (V)

2.3

Vin (max) (V)

5.5

Type

Converter

Switching frequency (min) (kHz)

3600

Switching frequency (max) (kHz)

4400

Iout (max) (A)

1

Vin (min) (V)

2.3

Vin (max) (V)

5.5

Type

Converter

Switching frequency (min) (kHz)

3600

Switching frequency (max) (kHz)

4400

DSBGA (YZR)

6

2.1875 mm² 1.75 x 1.25

Input Voltage: 2.3 V to 5.5 V
Output Voltage: 0.75 V to 3.3 V
±1% DC Output Voltage Precision
4-MHz Switching Frequency
64-μA (typical) Quiescent Current in ECO Mode
1-A Maximum Load Capability
Automatic ECO/PWM Mode Switching
MODE Pin to Select ECO/Forced PWM Mode
Current Overload and Thermal Shutdown Protections
Only Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm²)

Input Voltage: 2.3 V to 5.5 V
Output Voltage: 0.75 V to 3.3 V
±1% DC Output Voltage Precision
4-MHz Switching Frequency
64-μA (typical) Quiescent Current in ECO Mode
1-A Maximum Load Capability
Automatic ECO/PWM Mode Switching
MODE Pin to Select ECO/Forced PWM Mode
Current Overload and Thermal Shutdown Protections
Only Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm²)

The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available.

The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low I_Q under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby.

The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a
1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available.

The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low I_Q under light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby.

The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a
1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.

For all available packages, see the orderable addendum at the end of the data sheet.

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	类型	标题		日期
*	数据表	LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications 数据表 (Rev. J)	PDF \| HTML	2015年 12月 17日
	应用手册	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024年 3月 25日
	选择指南	电源管理指南 2018 (Rev. K)		2018年 7月 31日
	选择指南	电源管理指南 2018 (Rev. R)		2018年 6月 25日
	EVM 用户指南	AN-1772 LM3691 Evaluation Board (Rev. B)		2013年 4月 30日
	应用手册	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		2013年 4月 24日
	应用手册	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		2013年 4月 23日
	应用手册	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		2013年 4月 23日
	应用手册	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013年 4月 23日
	更多文献资料	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		2005年 7月 12日
	应用手册	AN-643 EMI/RFI Board Design (Rev. B)		2004年 5月 3日

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The LM3691 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1A load current, over an input voltage range from 2.3V to 5.5V. There are several different fixed voltage output options available.

The (...)

用户指南: PDF