LM3691

現行

適用可攜式應用的高準確、微型 1A、降壓 DC-DC 轉換器

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產品規格表

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

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TPS62860

現行

具 I2C/VSEL 介面的 1.75-V 至 5.5-V ， 0.6-A 超低 IQ 降壓轉換器 Smaller solution size and low quiescent current with I2C/VSEL interface

LM3691

現行

產品規格表

立即訂購

產品詳細資料

Iout (max) (A)

1

Vin (min) (V)

2.3

Vin (max) (V)

5.5

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

3600

Switching frequency (max) (kHz)

4400

Features

Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification

Control mode

Voltage mode

Vout (min) (V)

0.75

Vout (max) (V)

3.3

Rating

Catalog

Operating temperature range (°C)

-30 to 85

Iq (typ) (A)

0.000064

Iout (max) (A)

1

Vin (min) (V)

2.3

Vin (max) (V)

5.5

Topology

Buck

Type

Converter

Switching frequency (min) (kHz)

3600

Switching frequency (max) (kHz)

4400

Features

Enable, Forced PWM, Light Load Efficiency, Light load efficiency, Synchronous Rectification

Control mode

Voltage mode

Vout (min) (V)

0.75

Vout (max) (V)

3.3

Rating

Catalog

Operating temperature range (°C)

-30 to 85

Iq (typ) (A)

0.000064

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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檢視所有 10

	類型	標題		日期
*	Data sheet	LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications datasheet (Rev. J)	PDF \| HTML	2015年 12月 17日
	Application note	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	2024年 3月 25日
	Selection guide	Power Management Guide 2018 (Rev. R)		2018年 6月 25日
	EVM User's guide	AN-1772 LM3691 Evaluation Board (Rev. B)		2013年 4月 30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-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		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-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		2013年 4月 23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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LM3691TL-1.8EV — LM3691TL-1.8 評估板

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 (...)

使用指南: PDF