LM3678 Selling Leads, Price trend, LM3678 DataSheet download, circuit diagram from SeekIC.com

PinoutSpecificationsOutput Current1000 mAInput Min Voltage2.5 VoltInput Max Voltage5.5 VoltOutput Min0.8 VoltOutput Max1.2 VoltFrequency Min2700 kHzFrequency Max3600 kHzEfficiency (peak)85 %On/Off PinYesError FlagYesSoftStartYesRegTypeSwitching RegulatorTemperature Min-30 deg CTemperature Max85 de...

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SeekIC No. : 004395414 Detail

LM3678: PinoutSpecificationsOutput Current1000 mAInput Min Voltage2.5 VoltInput Max Voltage5.5 VoltOutput Min0.8 VoltOutput Max1.2 VoltFrequency Min2700 kHzFrequency Max3600 kHzEfficiency (peak)85 %On/Off P...

LM3678 Data Sheet

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Part Number:: LM3678
Supply Ability:: 5000

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Qty
1~5000

Unit Price
Negotiable

Processing time
15 Days

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Upload time: 2024/11/23

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Description

Pinout

Specifications

Output Current	1000 mA
Input Min Voltage	2.5 Volt
Input Max Voltage	5.5 Volt
Output Min	0.8 Volt
Output Max	1.2 Volt
Frequency Min	2700 kHz
Frequency Max	3600 kHz
Efficiency (peak)	85 %
On/Off Pin	Yes
Error Flag	Yes
SoftStart	Yes
RegType	Switching Regulator
Temperature Min	-30 deg C
Temperature Max	85 deg C
Adjustable Output	No
PWM Mode	Voltage
Topology	Synchronous Buck
Step-Down	Yes
Multiple Output Capability	Yes
Output Range	0.8/1.2
Switching Frequency	3300 kHz
Regulator Family	SIMPLE SWITCHER
AEC Q-100 Automotive Grade	Undefined
Automotive Selection Guide	No
PowerWise	Yes
Synchronous Rectification	Yes
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Description

The LM3678 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5V to 5.5V. It provides up to 1.5A load current, over the entire input voltage range. LM3678 offers a 0.8V/1.2V option. One of the pair of voltages is set through the VSELECT pin.

LM3678 operates in PWM mode with a fixed frequency of 3.3MHz. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01µA (typ).

The LM3678 is available in a 3mm x 3mm LLP-10 package. A high switching frequency of 3.3MHz (typ.) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required (solution size less than 33 mm 2). For voltages other than the voltage shown, please refer to ordering information section or contact National Semiconductor.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3678SD-1.2	CMOS7	0	16561	0	0	954000	4	270700104
LM3678SDE-1.2	CMOS7	0	16561	0	0	954000	4	270700104
LM3678SDX-1.2	CMOS7	0	16561	0	0	954000	4	270700104

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date
AN-1722: Application Note 1722 LM3678 Evaluation Board	506 Kbytes	14-Oct-08	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

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If you have trouble printing or viewing PDF file(s), see Printing Problems.

LM3678

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