Specification	LM22678QTJ-ADJ/NOPB

Current - Output	5 A
Frequency - Switching	500 kHz
Function	Step-Down
Grade	Automotive
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	TO-263-7 Thin
Qualification	AEC-Q100
Supplier Device Package	TO-263-7 Thin
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max)	37 V
Voltage - Output (Min/Fixed)	1.285 V

LM22678-Q1 Series

5A SIMPLE SWITCHER, Step-Down Voltage Regulator with Precision Enable

Part	Number of Outputs	Current - Output	Function	Topology	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Voltage - Output (Max)	Output Configuration	Voltage - Output (Min/Fixed)	Package / Case	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Frequency - Switching	Output Type	Output Type	Qualification	Grade
Texas Instruments LM22678TJ-ADJ/J7002567	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin	37 V	Positive	1.285 V	TO-263-7 Thin	4.5 V	42 V	500 kHz	Adjustable
Texas Instruments LM22678TJ-5.0/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin		Positive	5 V	TO-263-7 Thin	4.5 V	42 V	500 kHz		1.81 mOhm
Texas Instruments LM22678TJE-5.0/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin		Positive	5 V	TO-263-7 Thin	4.5 V	42 V	500 kHz		1.81 mOhm
Texas Instruments LM22678QTJ-ADJ/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin	37 V	Positive	1.285 V	TO-263-7 Thin	4.5 V	42 V	500 kHz	Adjustable		AEC-Q100	Automotive
Texas Instruments LM22678QTJE-5.0/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin		Positive	5 V	TO-263-7 Thin	4.5 V	42 V	500 kHz		1.81 mOhm	AEC-Q100	Automotive
Texas Instruments LM22678QTJE-ADJ/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin	37 V	Positive	1.285 V	TO-263-7 Thin	4.5 V	42 V	500 kHz	Adjustable		AEC-Q100	Automotive
Texas Instruments LM22678TJ-ADJ/NOPB	1	5 A	Step-Down	Buck	Surface Mount	-40 °C	125 ¯C	TO-263-7 Thin	37 V	Positive	1.285 V	TO-263-7 Thin	4.5 V	42 V	500 kHz	Adjustable

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	$ 6.63
	Digi-Reel®	1	$ 6.63
	Tape & Reel (TR)	1000	$ 4.25
		2000	$ 4.17
Texas Instruments	LARGE T&R	1	$ 5.15
		100	$ 4.20
		250	$ 3.30
		1000	$ 2.80

Description

General part information

LM22678-Q1 Series

The LM22678 switching regulator provides all of the functions necessary to implement an efficient high-voltage step-down (buck) regulator using a minimum of external components. This easy-to-use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 5 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5-V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The new product,LM61460, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See thedevice comparison tableto compare.Start WEBENCH design with LM61460

The LM22678 device is a member of Texas Instruments’ SIMPLE SWITCHER family. The SIMPLE SWITCHER concept provides for an easy-to-use complete design using a minimum number of external components and the TI WEBENCH design tool. TI’s WEBENCH tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.