LM5127-Q1 Series

42V wide-Vin triple buck and boost controller for automotive applications

Catalog

42V wide-Vin triple buck and boost controller for automotive applications

Part	Function	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Mounting Type	Topology	Clock Sync	Control Features	Supplier Device Package	Package / Case	Output Phases	Synchronous Rectifier	Frequency - Switching [Min]	Frequency - Switching [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Number of Outputs	Output Configuration	Duty Cycle (Max) [Max]
Texas Instruments LM5127QRGZRQ1	Step-Down Step-Up Step-Up/Step-Down	0.8 V	42 V	Surface Mount Wettable Flank	Boost Buck SEPIC		Current Limit Enable Frequency Control Soft Start	48-VQFN (7x7)	48-VFQFN Exposed Pad	1		100 kHz	2.2 MHz	150 °C	-40 °C	Transistor Driver	3	Positive	94 %

Catalog

42V wide-Vin triple buck and boost controller for automotive applications

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designSuited for various architectures and scalableTriple-output synchronous controllersFlexible topologyCH1: boost / buck topologyCH2, CH3: two single phase bucks / dual-phase interleaved buck topologyEnable pin and PGOOD indicator per channelOptional low IQbattery monitorWide operating range for automotive applications3.8-V to 42-V input operating rangeMinimum boost input 0.8 V when BIAS ≥ 3.8 VBoost output: adjustable up to 42 VBuck output: fixed 3.3 V, 5 V, or adj. 0.8 - 42 VBypass operation when VSUPPLY>VLOAD(boost)LDO operation when VSUPPLY≈ VLOAD(buck)Minimized battery drainShutdown current ≤ 2.8 µAAutomatic transition to low-IQsleep modeBattery drain in sleepIQ≤ 14 µA when 3.3-V buck onIQ≤ 22 µA when 3.3-V and 5-V bucks onIQ≤ 32 µA when 3.3-V, 5-V bucks on and boost in bypassHigh efficiency using strong 5-V driversDual input VCC and VDD regulatorsSmall and cost-effective solutionMaximum switching frequency 2.2 MHzInternal boot diode (boost)Constant peak current limitSupports DCR inductor current sensingQFN-48 with wettable flanksAvoid AM band interference and crosstalkOptional clock synchronizationSwitching frequency from 100 kHz to 2.2 MHzSelectable switching mode (FPWM, diode emulation, and skip mode)EMI mitigationOptional programmable spread spectrumProgrammability and flexibilityProgrammable wake-up and sleep thresholdDynamic switching frequency programmingAdjustable soft start timeAdjustable output using 0.8 V ±1% referenceAdaptive dead-time controlIntegrated protection featuresOvercurrent protectionCycle-by-cycle peak current limitOptional hiccup mode protection (buck)Optional latch-off mode protection (buck)Overvoltage protectionHB-SW short protection (boost)Thermal shutdownAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designSuited for various architectures and scalableTriple-output synchronous controllersFlexible topologyCH1: boost / buck topologyCH2, CH3: two single phase bucks / dual-phase interleaved buck topologyEnable pin and PGOOD indicator per channelOptional low IQbattery monitorWide operating range for automotive applications3.8-V to 42-V input operating rangeMinimum boost input 0.8 V when BIAS ≥ 3.8 VBoost output: adjustable up to 42 VBuck output: fixed 3.3 V, 5 V, or adj. 0.8 - 42 VBypass operation when VSUPPLY>VLOAD(boost)LDO operation when VSUPPLY≈ VLOAD(buck)Minimized battery drainShutdown current ≤ 2.8 µAAutomatic transition to low-IQsleep modeBattery drain in sleepIQ≤ 14 µA when 3.3-V buck onIQ≤ 22 µA when 3.3-V and 5-V bucks onIQ≤ 32 µA when 3.3-V, 5-V bucks on and boost in bypassHigh efficiency using strong 5-V driversDual input VCC and VDD regulatorsSmall and cost-effective solutionMaximum switching frequency 2.2 MHzInternal boot diode (boost)Constant peak current limitSupports DCR inductor current sensingQFN-48 with wettable flanksAvoid AM band interference and crosstalkOptional clock synchronizationSwitching frequency from 100 kHz to 2.2 MHzSelectable switching mode (FPWM, diode emulation, and skip mode)EMI mitigationOptional programmable spread spectrumProgrammability and flexibilityProgrammable wake-up and sleep thresholdDynamic switching frequency programmingAdjustable soft start timeAdjustable output using 0.8 V ±1% referenceAdaptive dead-time controlIntegrated protection featuresOvercurrent protectionCycle-by-cycle peak current limitOptional hiccup mode protection (buck)Optional latch-off mode protection (buck)Overvoltage protectionHB-SW short protection (boost)Thermal shutdown

Description

The LM5127-Q1 is a full featured, wide input range three channel DC/DC controller which supports flexible topology (Boost/Buck) with peak current mode control. The device is designed as an integrated one-chip solution for the front-stage power supply in automotive infotainment, cluster, body control as well as ADAS systems. (continue on next page) The LM5127-Q1 is a full featured, wide input range three channel DC/DC controller which supports flexible topology (Boost/Buck) with peak current mode control. The device is designed as an integrated one-chip solution for the front-stage power supply in automotive infotainment, cluster, body control as well as ADAS systems. (continue on next page)