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Texas Instruments LM5141-Q1 | Demoboard PMP15041

25W Automotive Start-Stop Reference Design Operating at 2.2 MHz

Overview

TopologyBuck Converter
IC revisionE3

Description

Automotive 12V batteries typically operate in the range of 9V-16V. However this voltage can vary widely due to transient conditions such as cold crank and load dump. This reference design creates a well-regulated 25W (5V,5A) output, regardless of large input voltage transients, utilizing the LM5150-Q1 and LM5141-Q1. The LM5150-Q1 is implemented as a pre-boost, only switching when the input voltage is below 6.8V, and utilizes the inductor as a differential EMI filter when not switching. The LM5141-Q1 operates as a buck controller regulating the 5V output. Both devices switch at 2.2 MHz.

Features

  • 2.8V minimum input voltage
  • 25W output peak power (5V, 5A)
  • 2.2MHz switching frequency

Typical applications

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Products

Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQ
(%)
DF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Ø D
(mm)
Samples
885012006057SPEC
8 files WCAP-CSGP MLCCs 50 V(DC)100 pF ±5% 50 0603 -55 °C up to +125 °C 100010 GΩ NP0 Class I 1.6 0.8 0.8 0.4 7" Tape & Reel
875105344009SPEC
7 files WCAP-PSLP Aluminum Polymer Capacitors82 µF ±20% 16 6.3 x 5.8 -55 °C up to +105 °C 8 5.8 6.6 15" Tape & Reel 2000 -55 °C up to +105 °C 2200 35 400 6.3
Order Code Data­sheet Simu­lation
885012006057SPEC
875105344009SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQ
(%)
DF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Ø D
(mm)
Samples