LM3673TLX-ADJ/NOPB

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Texas Instruments

CONV DC-DC 2.7V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 1.1V TO 3.3V 0.35A 5-PIN DSBGA T/R

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LM3673TLX-ADJ/NOPB

Active

Texas Instruments

CONV DC-DC 2.7V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 1.1V TO 3.3V 0.35A 5-PIN DSBGA T/R

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Description Specifications Series Pricing CAD Documents

Description

General part information

LM3673 Series

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 2.7 V to 5.5 V. It provides up to 350-mA 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 1.1 V to 3.3 V.

The device offers superior features and performance for mobile phones and similar portable systems. The LM3673 uses intelligent automatic switching between pulse width modulation (PWM) and pulse frequency modulation (PFM) for better efficiency. During PWM mode, the device operates at a fixed-frequency of2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) 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 (typical).

The LM3673 is available in a tiny 5-pin DSBGA package. A high switching frequency of 2 MHz (typical) allows the use of three tiny surface-mount components: an inductor and two ceramic capacitors.

Technical Specifications

Parameters and characteristics for this part

Specification	LM3673TLX-ADJ/NOPB

Current - Output	350 mA
Frequency - Switching	2 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-30 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	DSBGA, 5-WFBGA
Package Length	1.41 mm
Package Name	5-DSBGA
Package Width	1.08 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.7 V
Voltage - Output (Max)	3.3 V
Voltage - Output (Min/Fixed)	1.1 V

LM3673 Series

Part	Package / Case	Topology	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Function	Package Width	Package Name	Package Length	Voltage - Input (Min)	Synchronous Rectifier	Number of Outputs	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Input (Max)	Current - Output	Mounting Type	Frequency - Switching	Output Configuration	Output Type	Supplied Contents	Board Type	Total Output Count	Non-Isolated Output Count	Utilized IC / Part	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Contents	Regulator Topology	Voltage - Output	Main Purpose	Voltage - Output (Min)
Texas Instruments LM3673TL-ADJ/NOPB	5-WFBGA DSBGA	Buck	1.1 V	3.3 V	Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Adjustable
Texas Instruments LM3673TL-1.875/NOPB	5-WFBGA DSBGA	Buck	1.875 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TLX-1.5/NOPB	5-WFBGA DSBGA	Buck	1.5 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TL-1.5/NOPB	5-WFBGA DSBGA	Buck	1.5 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TL-1.5EV															350 mA		2 MHz		Non-Isolated	Board(s)	Fully Populated	1	1 count	LM3673	2.7 V	5.5 V	Board	Buck	1.5 V	DC/DC Step Down
Texas Instruments LM3673TL-ADJEV				3.3 V											350 mA		2 MHz		Non-Isolated	Board(s)	Fully Populated	1	1 count	LM3673	2.7 V	5.5 V	Board	Buck		DC/DC Step Down	1.1 V
Texas Instruments LM3673TL-1.2/NOPB	5-WFBGA DSBGA	Buck	1.2 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TLX-1.8/NOPB	5-WFBGA DSBGA	Buck	1.8 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TLX-1.5/NOPB	5-WFBGA DSBGA	Buck	1.5 V		Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Fixed
Texas Instruments LM3673TLX-ADJ/NOPB	5-WFBGA DSBGA	Buck	1.1 V	3.3 V	Step-Down	1.08 mm	5-DSBGA	1.41 mm	2.7 V	Yes	1	85 °C	-30 °C	5.5 V	350 mA	Surface Mount	2 MHz	Positive	Adjustable

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

AN-1465 LM3673 Evaluation Board (Rev. D)

LM3673 2-MHz, 350-mA Step-Down DC-DC Converter datasheet (Rev. M)