Product category: Power Supply ICs and Controllers
News Release from: National Semiconductor | Subject: LM3743
Edited by the Electronicstalk Editorial Team on 27 September 2006
Switching controller powers up to 10A
National Semiconductor has introduced a 1MHz synchronous buck switching controller in an ultra-small MSOP package that is optimised for powering loads up to 10A.
National Semiconductor has introduced a 1MHz synchronous buck switching controller in an ultra-small MSOP package that is optimised for powering loads up to 10A The robust LM3743, which requires minimal external circuitry for a smaller overall footprint, also has programmable tracking and extensive protection features which make the controller well-suited for space-constrained designs in communications, high-end consumer, computing and industrial applications
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The LM3743 voltage-mode PWM buck controller operates over the input range of 3 to 5.5V and drives external synchronous MOSFETs at either 300kHz or 1MHz, which generates output voltages as low as 0.8V.
It features an externally programmable soft start with tracking capability and external compensation.
The LM3743 has an externally programmable current limit with low-side MOSFET current sensing that is +/-15% accurate, as well as a hiccup mode of operation, which means that engineers do not need to overdesign external components.
Additional protection features include undervoltage lockout and a fixed short-circuit, high-side current limit.
Reference accuracy is +/-1.75% over the whole operating temperature range of -40 to +125C.
The LM3743 is offered in a tiny 10-pin mini SOIC package.
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