LM51521-Q1 Series

Automotive 2.2-MHz wide VINlow IQ synchronous boost controller with disabled bypass mode

Catalog

Automotive 2.2-MHz wide VINlow IQ synchronous boost controller with disabled bypass mode

Part	Package / Case	Output Phases	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Grade	Frequency - Switching [Min]	Frequency - Switching [Max]	Clock Sync	Synchronous Rectifier	Number of Outputs	Duty Cycle (Max)	Function	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Control Features	Output Configuration	Qualification	Mounting Type	Output Type
Texas Instruments LM51521QRGRRQ1	20-VFQFN Exposed Pad	1	0.8 V	42 V	Automotive	100 kHz	2.2 MHz			1	80 % 94 %	Step-Up	150 °C	-40 °C	Boost	Dead Time Control Enable Frequency Control Ramp Soft Start Tracking	Positive	AEC-Q100	Surface Mount Wettable Flank	Transistor Driver

Catalog

Automotive 2.2-MHz wide VINlow IQ synchronous boost controller with disabled bypass mode

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 wide operating range automotive battery powered applications3.8-V to 42-V input operating rangeDynamically programmable VOUTfrom 5 V to 20 V (protection up to 57 V)Minimum boost input 0.8 V when BIAS ≥ 3.8 VBypass operation when VSUPPLY> VLOAD(LM5152 only, see the device comparison table)Minimized battery drainShutdown current ≤ 3 µAAutomatic mode transitionBattery drain in deep sleep ≤ 11 µA (bypass operation, charge pump off)Battery drain in deep sleep ≤ 33 µA (bypass operation, charge pump on)BIAS IQin sleep ≤ 13 µA (skip mode)Strong 5-V MOSFET driversSmall solution size and low cost2.2-MHz maximum switching frequencyInternal boot diodeConstant peak current limit over VINSupports DCR inductor current sensingQFN-20 with wettable flanksAvoid AM band interference and crosstalkOptional clock synchronization100-kHz to 2.2-MHz switching frequencySelectable switching mode (FPWM, diode emulation, skip mode)EMI mitigationOptional programmable spread spectrumLead-less packageProgrammability and flexibilityDynamic VOUTtrackingDynamic switching frequency programmingProgrammable line UVLOAdjustable soft startAdaptive dead timeBoost STATUS indicatorIntegrated protection featuresCycle-by-cycle peak current limitOvervoltage protectionHB-SW short protectionThermal shutdownAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C, TAFunctional Safety-CapableDocumentation available to aid functional safety system designSuited for wide operating range automotive battery powered applications3.8-V to 42-V input operating rangeDynamically programmable VOUTfrom 5 V to 20 V (protection up to 57 V)Minimum boost input 0.8 V when BIAS ≥ 3.8 VBypass operation when VSUPPLY> VLOAD(LM5152 only, see the device comparison table)Minimized battery drainShutdown current ≤ 3 µAAutomatic mode transitionBattery drain in deep sleep ≤ 11 µA (bypass operation, charge pump off)Battery drain in deep sleep ≤ 33 µA (bypass operation, charge pump on)BIAS IQin sleep ≤ 13 µA (skip mode)Strong 5-V MOSFET driversSmall solution size and low cost2.2-MHz maximum switching frequencyInternal boot diodeConstant peak current limit over VINSupports DCR inductor current sensingQFN-20 with wettable flanksAvoid AM band interference and crosstalkOptional clock synchronization100-kHz to 2.2-MHz switching frequencySelectable switching mode (FPWM, diode emulation, skip mode)EMI mitigationOptional programmable spread spectrumLead-less packageProgrammability and flexibilityDynamic VOUTtrackingDynamic switching frequency programmingProgrammable line UVLOAdjustable soft startAdaptive dead timeBoost STATUS indicatorIntegrated protection featuresCycle-by-cycle peak current limitOvervoltage protectionHB-SW short protectionThermal shutdown

Description

The LM5152x-Q1 (LM5152-Q1 and LM51521-Q1) device is a wide input range synchronous boost controller that employs peak current mode control. The LM5152x-Q1 (LM5152-Q1 and LM51521-Q1) device is a wide input range synchronous boost controller that employs peak current mode control.