LM3673 Selling Leads, Price trend, LM3673 DataSheet download, circuit diagram from SeekIC.com

PinoutSpecificationsOutput Current350 mAInput Min Voltage2.7 VoltInput Max Voltage5.5 VoltOutput Min1.8, 1.1, 1.875, 1.2, 1.5 VoltOutput Max1.8, 1.875, 1.2, 3.3, 1.5 VoltFrequency Min2000 kHzFrequency Max2000 kHzEfficiency (peak)96 %On/Off PinYesError FlagNoSoftStartYesSync PinNoInvertingNoFlyback...

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SeekIC No. : 004395411 Detail

LM3673: PinoutSpecificationsOutput Current350 mAInput Min Voltage2.7 VoltInput Max Voltage5.5 VoltOutput Min1.8, 1.1, 1.875, 1.2, 1.5 VoltOutput Max1.8, 1.875, 1.2, 3.3, 1.5 VoltFrequency Min2000 kHzFrequen...

LM3673 Data Sheet

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Part Number:: LM3673
Supply Ability:: 5000

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1~5000

Unit Price
Negotiable

Processing time
15 Days

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Product Details

Description

Pinout

Specifications

Output Current	350 mA
Input Min Voltage	2.7 Volt
Input Max Voltage	5.5 Volt
Output Min	1.8, 1.1, 1.875, 1.2, 1.5 Volt
Output Max	1.8, 1.875, 1.2, 3.3, 1.5 Volt
Frequency Min	2000 kHz
Frequency Max	2000 kHz
Efficiency (peak)	96 %
On/Off Pin	Yes
Error Flag	No
SoftStart	Yes
Sync Pin	No
Inverting	No
Flyback	No
RegType	Switching Regulator
Temperature Min	-30 deg C
Temperature Max	85 deg C
Adjustable Output	No, Yes
Adj Switch Frequency	No
PWM Mode	Voltage with input feedfoward
Topology	Synchronous Buck
Special Features	Pin-selectable PWM/PFM modes, Iq=15uA, 100% duty cycle, internal compensation, ceramic-cap stable, only 3 external components
Step-Down	Yes
Multiple Output Capability	No
Output Power	Undefined Watt
Output Voltage	1.8, Undefined, 1.875, 1.2, 1.5 Volt
Output Range	1.1V to 3.3V
Switching Frequency	2000 kHz
Feedback Voltage	Undefined Volt
Regulator Family	Undefined
PowerWise	Yes
Synchronous Rectification	Yes
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Description

The LM3673 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7V to 5.5V. It provides up to 350mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version ranging from 1.1V to 3.3V.

The device offers superior features and performance for mobile phones and similar portable systems. The LM3673 uses intelligent automatic switching between PWM and PFM for better efficiency. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typ).

The LM3673 is available in a tiny 5-bump MicroSMD package in leaded (PB) and lead-free (NO PB) versions. A high switching frequency of 2 MHz (typ) allows the use of three tiny surface-mount components, an inductor and two ceramic capacitors.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3673TL-1.2	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TL-1.5	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TL-1.8	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TL-1.875	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TL-ADJ	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TLX-1.2	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TLX-1.5	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TLX-1.8	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TLX-1.875	CMOS7	0	16561	0	0	954000	4	270700104
LM3673TLX-ADJ	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-1465: Application Note 1465 LM3673 Evaluation Board	3717 Kbytes	10-Oct-08	Download
AN-1465 (Chinese): Application Note 1465 LM3673 Evaluation Board	269 Kbytes		640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">

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

More Application Notes

Title	Size in Kbytes	Date
AN-1682: Application Note 1682 LM3679TL Evaluation Board	3720 Kbytes	14-Oct-08	Download
AN-1395: Application Note 1395 LM3671 Evaluation Board	3838 Kbytes	10-Oct-08	Download
AN-1395 (Chinese): Application Note 1395 LM3671 Evaluation Board	321 Kbytes		640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">
AN-1427: Application Note 1427 LM3674 Evaluation Board	4966 Kbytes	14-Oct-08	Download
AN-1427 (Chinese): Application Note 1427 LM3674 Evaluation Board	292 Kbytes		640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">
AN-1595: Application Note 1595 LM3677 Evaluation Board	2801 Kbytes	14-Oct-08	Download
AN-1536: Application Note 1536 LM3676 Evaluation Board	417 Kbytes	14-Oct-08	Download
AN-1536 (Chinese): Application Note 1536 LM3676 Evaluation Board	278 Kbytes		640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">
AN-1722: Application Note 1722 LM3678 Evaluation Board	506 Kbytes	14-Oct-08	Download
AN-1348: Application Note 1348 LM3670 Evaluation Board	3906 Kbytes	9-Oct-08	Download
AN-1348 (Chinese): Application Note 1348 LM3670 Evaluation Board	257 Kbytes		640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">

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

LM3673

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