RAA271050 High Efficiency Synchronous Buck Regulator for Automotive Applications Short-Form Datasheet
■The RAA271050 works as a primary regulator and companion product with the RAA271000 system PMIC, whose target application is the R-CAR V3H processor, where a high performance complete power solution is required.
■The RAA271050 uses peak current mode control and this coupled with the high 2.2MHz fixed frequency provide component selection flexibility to minimize the total solution size. For applications where solution size is flexible, a 440kHz fixed frequency option is available which provides higher efficiency.
■The RAA271050 protection features include over - current, UVLO, output over-voltage, under-voltage, and thermal overload protection.
■The RAA271050 implements safety monitoring features that ensure that the output voltage and temperature are all within their expected ranges of operation. This IC also implements dual
bandgaps/reference voltages to ensure that the monitoring systems have a reference, which is
separate to the reference that the regulator is using.
■Features
▲AEC-Q100 qualified, Grade 1: -40°C to +125°C
▲Supports ASIL C Systems
▲V IN operating range from 4.0V to 42V
▲V OUT = 5.0V or 3.3V (factory programmable)
▲High efficiency synchronous buck regulator with efficiency up to:
●95%; V IN = 12V; V OUT = 5V; F = 440kHz
● 92%; V IN = 12V; V OUT = 5V; F = 2.2MHz
▲2% V OUT accuracy over temperature, load, line
▲Factory programmable soft-start
▲Soft-stop output discharge during disable
▲RSTb output which doubles as Monitor fault or Buck Fault Indicator
▲Fixed switching frequency: 2.2MHz or 440kHz
▲Spread Spectrum Modulation (SSM), pseudo-random frequency and dwell time
●Enable/disable
●Frequency modulation ±1%, ±2%, ±3%,
●Upward/centered/downward modulation
▲Boot UVLO
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High Efficiency Synchronous Buck Regulator 、 automotive grade (AEC Q-100 Grade 1) 4A synchronous step down voltage regulator |
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[ Automotive Applications ][ Automotive power ][ R-CAR processor PMICs ][ DC/DC POL modules ] |
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Datasheet |
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Please see the document for details |
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QFN |
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English Chinese Chinese and English Japanese |
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Mar 26, 2021 |
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Rev.1.0 |
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X0120261 |
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540 KB |
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