LM62435-Q1 Series

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

Catalog

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

Part	Qualification	Topology	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Voltage - Input (Min) [Min]	Function	Grade	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Output Type	Mounting Type	Supplier Device Package	Output Configuration	Current - Output
Texas Instruments LM62435APPQRJRRQ1	AEC-Q100	Buck	1	150 °C	-40 °C	14-PowerVFQFN	3 V	Step-Down	Automotive	2.2 MHz	200 kHz	36 V	1 V	34.2 V	Adjustable	Surface Mount Wettable Flank	14-VQFN-HR (4x3.5)	Positive	3.5 A
Texas Instruments LM62435BPPQRJRRQ1	AEC-Q100	Buck	1	150 °C	-40 °C	14-PowerVFQFN	3 V	Step-Down	Automotive	2.2 MHz	200 kHz	36 V	1 V	34.2 V	Adjustable	Surface Mount Wettable Flank	14-VQFN-HR (4x3.5)	Positive	3.5 A
Texas Instruments LM62435CPPQRJRRQ1	AEC-Q100	Buck	1	150 °C	-40 °C	14-PowerVFQFN	3 V	Step-Down	Automotive	2.2 MHz	200 kHz	36 V	1 V	34.2 V	Adjustable	Surface Mount Wettable Flank	14-VQFN-HR (4x3.5)	Positive	3.5 A

Catalog

Automotive 3-V to 36-V, 3.5-A, low EMI 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 timePin selectable FPWM mode for constant frequency at light loadsDesigned for automotive applicationsSupports 42-V automotive load dump±1% total output regulation accuracyVOUTadjustable from 1 V to 95% of VIN, with factory options for 5-V and 3.3-V fixed output voltageHigh 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:LM62440-Q1(36 V, 4 A, fixed 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 timePin selectable FPWM mode for constant frequency at light loadsDesigned for automotive applicationsSupports 42-V automotive load dump±1% total output regulation accuracyVOUTadjustable from 1 V to 95% of VIN, with factory options for 5-V and 3.3-V fixed output voltageHigh 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:LM62440-Q1(36 V, 4 A, fixed fSW)LM61460-Q1(36 V, 6 A, adjustable fSW)

Description

The LM62435-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; 42 V tolerance supports load dump for durations of 400ms. The LM62435-Q1 implements soft recovery from dropout eliminating overshoot on the output. The LM62435-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 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. The LM62435-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; 42 V tolerance supports load dump for durations of 400ms. The LM62435-Q1 implements soft recovery from dropout eliminating overshoot on the output. The LM62435-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 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.