Specification	LM3754SQX/NOPB

Clock Sync	True
Control Features	Frequency Control, Enable, Tracking, Power Good, Current Limit
Duty Cycle (Max) [Max]	81 %
Frequency - Switching [Max]	1 MHz
Frequency - Switching [Min]	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-5 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Supplier Device Package	32-WQFN (5x5)
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	18 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LM3754 Series

4.5-V to 18-V, scalable 2-phase synchronous buck controller with integrated FET drivers

Part	Function	Duty Cycle (Max) [Max]	Topology	Control Features	Number of Outputs	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Configuration	Clock Sync	Mounting Type	Output Phases	Operating Temperature [Min]	Operating Temperature [Max]	Synchronous Rectifier	Supplier Device Package	Output Type	Frequency - Switching [Max]	Frequency - Switching [Min]
Texas Instruments LM3754SQX/NOPB	Step-Down	81 %	Buck	Current Limit Enable Frequency Control Power Good Tracking	2	4.5 V	18 V	Positive		Surface Mount	2	-5 °C	125 ¯C		32-WQFN (5x5)	Transistor Driver	1 MHz	200 kHz

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	4500	$ 3.50
Texas Instruments	LARGE T&R	1	$ 5.39
		100	$ 4.39
		250	$ 3.45
		1000	$ 2.93

Description

General part information

LM3754 Series

The LM3754 is a full featured single-output dual-phase voltage-mode synchronous PWM buck controller. It can be configured to control from 2 to 12 interleaved power stages creating a single high power output. This controller utilizes voltage-mode control with input voltage feed-forward for high noise immunity. An internal average current loop forces real time current sharing between phases during load transients.

The LM3754 supports adjustable Soft-Start. The Soft-Start function can only drive the output upwards – it will not pull it down, therefore, pre-biased loads will not be discharged. Available in the 5 mm x 5 mm thermally enhanced 32-lead WQFN package with a thermal pad.

Documents

Technical documentation and resources

LM3754 Scalable 2-Phase Synchronous Buck Controller w/ FET datasheet (Rev. B)

Data sheet