LM22678-Q1 Series

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

Catalog

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

Catalog

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

Key Features

• New product available:LM61460 3-V to 36-V, 6-A low EMI synchronous converterWide input voltage range: 4.5 V to 42 VInternally compensated voltage mode controlStable with low-ESR ceramic capacitors100-mΩ N-channel MOSFETOutput voltage options: -ADJ (outputs as low as 1.285 V) -5.0 (output fixed to 5 V)±1.5% Feedback reference accuracySwitching frequency of 500 kHz–40°C to 125°C Operating junction temperature rangePrecision enable pinIntegrated bootstrap diodeIntegrated soft startFully WEBENCH enabledLM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)PFM (exposed pad) packageNew product available:LM61460 3-V to 36-V, 6-A low EMI synchronous converterWide input voltage range: 4.5 V to 42 VInternally compensated voltage mode controlStable with low-ESR ceramic capacitors100-mΩ N-channel MOSFETOutput voltage options: -ADJ (outputs as low as 1.285 V) -5.0 (output fixed to 5 V)±1.5% Feedback reference accuracySwitching frequency of 500 kHz–40°C to 125°C Operating junction temperature rangePrecision enable pinIntegrated bootstrap diodeIntegrated soft startFully WEBENCH enabledLM22678-Q1 is an automotive-grade product that is AEC-Q100 grade 1 qualified (–40°C to +125°C operating junction temperature)PFM (exposed pad) package

Description

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. 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.