Specification	LM3678SD-1.2/NOPB

Current - Output	1.5 A
Frequency - Switching	3.3 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	Programmable
Package / Case	10-WFDFN Exposed Pad
Supplier Device Package	10-SON (3x3)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	5.5 V
Voltage - Input (Min) [Min]	2.5 V
Voltage - Output (Min/Fixed)	0.8 V, 1.2 V

LM3678 Series

Part	Voltage - Output	Frequency - Switching	Regulator Topology	Current - Output	Outputs and Type	Outputs and Type	Board Type	Voltage - Input [Min]	Voltage - Input [Max]	Supplied Contents	Main Purpose	Utilized IC / Part	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Output Type	Supplier Device Package	Number of Outputs	Topology	Output Configuration	Voltage - Input (Min) [Min]	Function
Texas Instruments LM3678SD-1.2EV	0.8 V 1.2 V	3.3 MHz	Buck	1.5 A	Non-Isolated	1	Fully Populated	2.5 V	5.5 V	Board(s)	DC/DC Step Down	LM3678
Texas Instruments LM3678SD-1.2/NOPB		3.3 MHz		1.5 A									10-WFDFN Exposed Pad	-30 °C	85 °C	Surface Mount	5.5 V	0.8 V 1.2 V	Programmable	10-SON (3x3)	1	Buck	Positive	2.5 V	Step-Down
Texas Instruments LM3678SDE-1.2/NOPB		3.3 MHz		1.5 A									10-WFDFN Exposed Pad	-30 °C	85 °C	Surface Mount	5.5 V	0.8 V 1.2 V	Programmable	10-SON (3x3)	1	Buck	Positive	2.5 V	Step-Down

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.99
		10	$ 1.79
		25	$ 1.69
		100	$ 1.44
	Digi-Reel®	1	$ 1.99
		10	$ 1.79
		25	$ 1.69
		100	$ 1.44
		250	$ 1.35
		500	$ 1.18
	Tape & Reel (TR)	1000	$ 0.83
Texas Instruments	SMALL T&R	1	$ 1.50
		100	$ 1.24
		250	$ 0.89
		1000	$ 0.67

Description

General part information

LM3678 Series

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 2.5 V to 5.5 V. It provides up to 1.5-A load current, over the entire input voltage range. LM3678 offers a 0.8V or 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 3.3 MHz. 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 LM3678 is available in a 3mm x 3mm DSC-10 package. A high switching frequency of 3.3 MHz (typical) 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 mm2). For voltages other than the voltage shown, contact TI or your distributor.

Documents

Technical documentation and resources

Power Management Guide 2018 (Rev. R)

Selection guide

AN-1722 LM3678 Evaluation Board (Rev. B)

EVM User's guide

H-Perform, Mini 1.5-A Step-Dwn DC-DC Cnvrtr for Handheld Apps datasheet (Rev. C)

Data sheet