Texas Instruments introduces a 2.2-MHz, dual-channel synchronous buck converter. Integrated with unique set of features which significantly reduces 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.
Together with TI’s WEBENCH Automotive Design tool, the LM5140-Q1 enables engineers to get their automotive designs to market faster.
The LM5140-Q1 controller includes dual outputs with phase interleaving and is offered in wettable flank packaging that speeds manufacturing.
Key Features and Benefits:
- Wide 3.8-V to 65-V operating range handles start-stop and load-dump conditions for 12-V/24-V lead-acid and emerging 48-V Lithium-ion automotive batteries.
- 2-MHz operation with external synchronization capability moves switching noise above the sensitive AM band, eliminating the need for frequency hopping.
- Unique, adjustable gate-drive slew-rate control reduces EMI emissions by up to 10 dB with less than a 1 percent reduction in efficiency, which reduces external EMI filtering, saves printed circuit board (PCB) area, and simplifies compliance with CISPR 25 automotive EMI requirements.
- Low 35-uA quiescent current (IQ) in standby (one channel operating with no load) extends battery life in “always on” applications.
- Wettable flank packaging enables post-solder visual inspection to speed manufacturing.
The company touts that the LM5140-Q1 will join 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|
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.
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.
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 atUS$3.90 in 1,000-unit quantities.
TO order LM5140-Q1 evaluation module and download the LM5140-Q1 quick-start DC/DC synchronous buck converter design tool.