LM61435-Q1 Series

Automotive 3-V to 36-V, 3.5-A synchronous step-down converter

Catalog

Automotive 3-V to 36-V, 3.5-A synchronous step-down converter

Part	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Mounting Type	Grade	Supplier Device Package	Number of Outputs	Output Configuration	Package / Case	Topology	Output Type	Voltage - Input (Max) [Max]	Synchronous Rectifier	Voltage - Output (Max) [Max]	Function	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Qualification	Current - Output
Texas Instruments LM61435AASQRJRRQ1	150 °C	-40 °C	1 V	Surface Mount Wettable Flank	Automotive	14-VQFN-HR (4x3.5)	1	Positive	14-PowerVFQFN	Buck	Adjustable	36 V		34 V	Step-Down	3 V	2.2 MHz	200 kHz	AEC-Q100	3.5 A
Texas Instruments LM61435AANQRJRRQ1	150 °C	-40 °C	1 V	Surface Mount Wettable Flank	Automotive	14-VQFN-HR (4x3.5)	1	Positive	14-PowerVFQFN	Buck	Adjustable	36 V		34.2 V	Step-Down	3 V	2.2 MHz	200 kHz	AEC-Q100	3.5 A

Catalog

Automotive 3-V to 36-V, 3.5-A synchronous step-down converter

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +150°C, TJFunctional Safety-CapableDocumentation available to aid functional safety system designOptimized for ultra low EMI requirementsHotrod™ package and parallel input path minimize switch node ringingSpread spectrum reduces peak emissionsAdjustable SW node rise timeDesigned for automotive applicationsSupports 42-V automotive load dump±1% total output regulation accuracyVOUTadjustable from 1 V to 95% of VIN, with factory option for 3.3-V fixed output voltage0.3-V dropout with 3-A load (typical)High efficiency power conversion at all loads7-µA no load current at 13.5 VIN, 3.3 VOUT83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUTExternal bias option for improved efficiencySuitable for scalable power suppliesPin compatible with:LM61440-Q1(36 V, 4 A, adjustable fSW)LM61460-Q1(36 V, 6 A, adjustable fSW)AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +150°C, TJFunctional Safety-CapableDocumentation available to aid functional safety system designOptimized for ultra low EMI requirementsHotrod™ package and parallel input path minimize switch node ringingSpread spectrum reduces peak emissionsAdjustable SW node rise timeDesigned for automotive applicationsSupports 42-V automotive load dump±1% total output regulation accuracyVOUTadjustable from 1 V to 95% of VIN, with factory option for 3.3-V fixed output voltage0.3-V dropout with 3-A load (typical)High efficiency power conversion at all loads7-µA no load current at 13.5 VIN, 3.3 VOUT83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUTExternal bias option for improved efficiencySuitable for scalable power suppliesPin compatible with:LM61440-Q1(36 V, 4 A, adjustable fSW)LM61460-Q1(36 V, 6 A, adjustable fSW)

Description

The LM61435-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 3.5 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61435-Q1 implements soft recovery from dropout eliminating overshoot on the output. The LM61435-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency. Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in theRelated Documentation. The LM61435-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 3.5 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61435-Q1 implements soft recovery from dropout eliminating overshoot on the output. The LM61435-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency. Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in theRelated Documentation.