LMR38015-Q1 Series

Automotive, 80V input, 1.5A synchronous step-down (buck) DC/DC converter with spread spectrum

Catalog

Automotive, 80V input, 1.5A synchronous step-down (buck) DC/DC converter with spread spectrum

Part	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Output Type	Supplier Device Package	Topology	Package / Case	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Function	Current - Output	Output Type	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]
Texas Instruments LMR38015SDRRR	4.2 V	80 V	2.2 MHz	200 kHz	Surface Mount Wettable Flank	Adjustable	12-WSON (3x3)	Buck	12-WFDFN Exposed Pad	1	150 °C	-40 °C	Positive	Step-Down	1.5 A
Texas Instruments LMR38015S5QDRRRQ1	4.2 V	80 V	2.2 MHz	200 kHz	Surface Mount Wettable Flank		12-WSON (3x3)	Buck	12-WFDFN Exposed Pad	1	150 °C	-40 °C	Positive	Step-Down	1.5 A	1.81 mOhm	5 V
Texas Instruments LMR38015FS5QDRRRQ1	4.2 V	80 V	2.2 MHz	200 kHz	Surface Mount Wettable Flank		12-WSON (3x3)	Buck	12-WFDFN Exposed Pad	1	150 °C	-40 °C	Positive	Step-Down	1.5 A	1.81 mOhm	5 V
Texas Instruments LMR38015SQDRRRQ1	4.2 V	80 V	2.2 MHz	200 kHz	Surface Mount Wettable Flank	Adjustable	12-WSON (3x3)	Buck	12-WFDFN Exposed Pad	1	150 °C	-40 °C	Positive	Step-Down	1.5 A		1 V	75 V

Catalog

Automotive, 80V input, 1.5A synchronous step-down (buck) DC/DC converter with spread spectrum

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +150°C, TJFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for Low EMI requirementsSpread spectrum option for reduced peak emissionsLow package parasitics facilitating CIPR25 class 5 complianceConfigured for rugged applications4.2-V to 80-V input voltage range1.5-A continuous output currentUltra-low 40-µA operating quiescent current200-kHz to 2.2-MHz adjustable switching frequencyFrequency synchronization to external clock97% maximum duty cycleSupports start-up events with prebiased output±1.5% reference voltage tolerance over temperaturePrecision enableEasy to use with integrated compensation network enabling low BOM countIntegrated synchronous rectification12-pin WSON Wettable Flank with PowerPAD™ integrated circuit packagePFM and forced PWM (FPWM) optionsCreate a custom design using the LMR38015-Q1 with theWEBENCH Power DesignerAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +150°C, TJFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for Low EMI requirementsSpread spectrum option for reduced peak emissionsLow package parasitics facilitating CIPR25 class 5 complianceConfigured for rugged applications4.2-V to 80-V input voltage range1.5-A continuous output currentUltra-low 40-µA operating quiescent current200-kHz to 2.2-MHz adjustable switching frequencyFrequency synchronization to external clock97% maximum duty cycleSupports start-up events with prebiased output±1.5% reference voltage tolerance over temperaturePrecision enableEasy to use with integrated compensation network enabling low BOM countIntegrated synchronous rectification12-pin WSON Wettable Flank with PowerPAD™ integrated circuit packagePFM and forced PWM (FPWM) optionsCreate a custom design using the LMR38015-Q1 with theWEBENCH Power Designer

Description

The LMR38015-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38015-Q1 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems as the absolute maximum input voltage is 85 V. The LMR38015-Q1 features a high voltage enable pin to enable the device by connecting the device to the wide input supply voltage or by having precise UVLO control across start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum option for minimal EMI. The switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be programmed through the RT pin for improved efficiency at low operating frequencies or by having a smaller design size at high operating frequencies. The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38015-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 12-pin WSON package. The LMR38015-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38015-Q1 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems as the absolute maximum input voltage is 85 V. The LMR38015-Q1 features a high voltage enable pin to enable the device by connecting the device to the wide input supply voltage or by having precise UVLO control across start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum option for minimal EMI. The switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be programmed through the RT pin for improved efficiency at low operating frequencies or by having a smaller design size at high operating frequencies. The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38015-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 12-pin WSON package.