LM43603-Q1 Series

Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter

Catalog

Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter

Part	Output Type	Output Configuration	Voltage - Input (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Supplier Device Package	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Topology	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Voltage - Output (Max)	Current - Output	Function	Package / Case	Package / Case	Supplied Contents	Voltage - Output	Frequency - Switching	Utilized IC / Part	Main Purpose	Board Type	Voltage - Input [Min]	Voltage - Input [Max]	Regulator Topology	Outputs and Type	Outputs and Type	Grade	Qualification
Texas Instruments LM43603PWP	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments LM43603PWPEVM															3 A				Board(s)	3.3 V	500 kHz	LM43603	DC/DC Step Down	Fully Populated	3.5 V	36 V	Buck	Non-Isolated	1
Texas Instruments LM43603QPWPRQ1	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width												Automotive	AEC-Q100
Texas Instruments LM43603AQPWPTQ1	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width												Automotive	AEC-Q100
Texas Instruments LM43603QPWPTQ1	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width												Automotive	AEC-Q100
Texas Instruments LM43603AQPWPRQ1	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width												Automotive	AEC-Q100
Texas Instruments LM43603PWPT	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount	16-HTSSOP	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments LM43603DSUT	Adjustable	Positive	36 V	2.2 MHz	200 kHz	Surface Mount Wettable Flank	16-SON (4x5)	-40 °C	125 ¯C	1	Buck	1 V	3.5 V	28 V	3 A	Step-Down	16-VFDFN Exposed Pad

Catalog

Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to +125°C Operating Junction Temperature27-µA Quiescent Current in RegulationHigh Efficiency at Light Load (DCM and PFM)Meets EN55022/CISPR 22 EMI StandardsIntegrated Synchronous RectificationAdjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)Frequency Synchronization to External ClockInternal CompensationStable With Almost any Combination of Ceramic, Polymer, Tantalum, and Aluminum CapacitorsPower-Good FlagSoft Start into a Pre-Biased LoadInternal Soft Start: 4.1 msExtendable Soft-Start Time by External CapacitorOutput Voltage Tracking CapabilityPrecision Enable to a Program System UVLOOutput Short Circuit Protection with Hiccup ModeOvertemperature Thermal Shutdown ProtectionCreate a Custom Design Using the LM43603-Q1 With theWEBENCH®Power DesignerQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to +125°C Operating Junction Temperature27-µA Quiescent Current in RegulationHigh Efficiency at Light Load (DCM and PFM)Meets EN55022/CISPR 22 EMI StandardsIntegrated Synchronous RectificationAdjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)Frequency Synchronization to External ClockInternal CompensationStable With Almost any Combination of Ceramic, Polymer, Tantalum, and Aluminum CapacitorsPower-Good FlagSoft Start into a Pre-Biased LoadInternal Soft Start: 4.1 msExtendable Soft-Start Time by External CapacitorOutput Voltage Tracking CapabilityPrecision Enable to a Program System UVLOOutput Short Circuit Protection with Hiccup ModeOvertemperature Thermal Shutdown ProtectionCreate a Custom Design Using the LM43603-Q1 With theWEBENCH®Power Designer

Description

The LM43603-Q1 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V absolute maximum). The LM43603-Q1 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 2-A load current options in pin-to-pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCCundervoltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM43603-Q1 device is available in the HTSSOP (PWP) 16-pin leaded package (6.6 mm × 5.1 mm × 1.2 mm). The LM43603A-Q1 version is optimized for PFM operation and recommended for new design. The device is pin-to-pin compatible with LM4360x and LM4600x family. The LM43603-Q1 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V absolute maximum). The LM43603-Q1 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 2-A load current options in pin-to-pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCCundervoltage lockout, cycle-by-cycle current limit, and output short circuit protection. The LM43603-Q1 device is available in the HTSSOP (PWP) 16-pin leaded package (6.6 mm × 5.1 mm × 1.2 mm). The LM43603A-Q1 version is optimized for PFM operation and recommended for new design. The device is pin-to-pin compatible with LM4360x and LM4600x family.