2.2-MHz, low-quiescent-current buck converter significantly reduces system noise and saves space in sensitive automotive power-supply systems
Texas Instruments (TI) (NASDAQ: TXN) today introduced a 2.2-MHz, dual-channel synchronous buck converter with a unique set of features designed to significantly reduce electromagnetic interference (EMI) and high-frequency noise in high-voltage DC/DC step-down applications such as automotive infotainment and high-end cluster power-supply systems. The LM5140-Q1 controller includes dual outputs with phase interleaving and is offered in wettable flank packaging that speeds manufacturing. Together with TI’s WEBENCH® Automotive Design tool, the LM5140-Q1 enables engineers to get their automotive designs to market faster. For more information, samples and an evaluation module, see www.ti.com/lm5140q1-pr-eu.
LM5140-Q1 key features and benefits:
For industrial applications requiring a regulated voltage above 15 V such as programmable logic controllers or factory automation equipment, read the blog post, “How to extend a controller’s output-voltage range.”
The LM5140-Q1 joins the recently released LM53600-Q1, LM53601-Q1, LM53602-Q1 and LM53603-Q1 buck converters to create a complete family of controllers and converters designed for automotive systems that draw from less than 1 A of power to more than 10 A. All of these devices feature greater than 2-MHz switching frequency, low operating IQ and EMI reduction features.
Part number | Operating voltage range (abs max) | Operating frequency | IQ (operating/ shutdown) | Package |
LM5140-Q1 | 3.8 V-65 V (70 V) | 2.2 MHz or 440 kHz | 35 uA/9 uA | 40-pin VQFN* |
LM53600-Q1 | 3.5 V-36 V (42 V) | 2.1 MHz | 23 uA/1.8 uA | 10-pin WSON* |
LM53601-Q1 | 3.5 V-36 V (42 V) | 2.1 MHz | 23 uA/1.8 uA | 10-pin WSON* |
LM53602-Q1 | 3.5 V-36 V (42 V) | 2.1 MHz | 24 uA/1.7 uA | 16-pin HTSSOP |
LM53603-Q1 | 3.5 V-36 V (42 V) | 2.1 MHz | 24 uA/1.7 uA | 16-pin HTSSOP |
* Wettable flank packaging.
The LM5140-Q1 uses external metal-oxide semiconductor field-effect transistors (MOSFETs) to support up to 10-A dual-channel loads for high-end infotainment systems and other noise-sensitive systems. The LM53600-Q1 and LM53601-Q1 support 650-mA and 1-A load current, respectively, for emerging advanced driver assistance (ADAS) systems. The LM53602-Q1 and LM53603-Q1 deliver 2-A and 3-A loads, respectively, for higher-current ADAS and infotainment systems. Watch the video, “TI’s LM53601-Q1 2.1-MHz step-down converter for 36-V, 1-A automotive applications.”
See a live demonstration of the LM5140-Q1 and LM53601-Q buck converters in TI’s booth (No. 1617) at the Applied Power Electronics Conference (APEC), March 21-23 in Long Beach, California. Follow TI at www.ti.com/apec2016.
Design an Automotive Camera Module
Download the “Automotive camera module reference design for uncompressed digital video with wide VIN front end” to view a full automotive camera module reference design for uncompressed digital video. The reference design includes the LM53601-Q1 converter and DS90UB913A 12-bit serializer. The reference design meets all industry tests including ISO7637 pulse, reverse battery, input over-voltage and CISPR25 Class 5-conducted EMI.
Create a 30-W surround-view ADAS system
Download the “System Level reference design for 30-W ADAS system with required automotive protections ” to view a complete ADAS system reference design featuring TI’s LM53603-Q1 converter, LM26420-Q1 regulator and LM3880 sequencer. The reference design meets all industry tests including ISO7637 pulse, reverse battery, input over-voltage and CISPR25 Class 3-conducted EMI.
Availability, packaging and pricing
Available in volume now from TI and its authorized distributors, the LM5140-Q1 is packaged in an 8-pin, 6-mm by 6-mm by 0.9-mm very thin quad flat no-lead (VQFN) package and priced at US$3.90 in 1,000-unit quantities. Order the LM5140-Q1 evaluation module and download the LM5140-Q1 quick-start DC/DC synchronous buck converter design tool.
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