LM53603-Q1 Series

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

Catalog

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

Part	Voltage - Input (Min) [Min]	Current - Output	Grade	Voltage - Output (Min/Fixed)	Function	Operating Temperature [Min]	Operating Temperature [Max]	Qualification	Topology	Supplier Device Package	Mounting Type	Voltage - Input (Max) [Max]	Package / Case	Package / Case	Output Type	Output Configuration	Frequency - Switching	Number of Outputs	Output Type	Package / Case [custom]	Package / Case [custom]	Voltage - Output (Max) [Max]
Texas Instruments LM53603AQPWPTQ1	3.9 V	3 A	Automotive	3.3 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Adjustable	Positive	2.1 MHz	1
Texas Instruments LM536035QPWPRQ1	3.9 V	3 A	Automotive	5 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width		Positive	2.1 MHz	1	1.81 mOhm
Texas Instruments LM53603AQPWPRQ1	3.9 V	3 A	Automotive	3.3 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-TSSOP Exposed Pad		Adjustable	Positive	2.1 MHz	1		0.173 "	4.4 mm
Texas Instruments LM53603AMPWPR	3.9 V	3 A	Automotive	3.3 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Adjustable	Positive	2.1 MHz	1				10 V
Texas Instruments LM53603AMPWPT	3.9 V	3 A	Automotive	3.3 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Adjustable	Positive	2.1 MHz	1				10 V
Texas Instruments LM536035QPWPTQ1	3.9 V	3 A	Automotive	5 V	Step-Down	-40 °C	125 ¯C	AEC-Q100	Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width		Positive	2.1 MHz	1	1.81 mOhm
Texas Instruments LM53603BQPWPRDN	3.5 V	3 A		3.3 V	Step-Down	-40 °C	125 °C		Buck	16-HTSSOP	Surface Mount	36 V	16-PowerTSSOP	0.173 in 4.4 mm Width	Adjustable	Positive	2.1 MHz	1				10 V

Catalog

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

Key Features

• The LM53603-Q1, LM53602-Q1 are available asAEC-Q1-Qualified Automotive Grade ProductsWith Following Results:Device Temperature Grade 1: –40°C to +125°CAmbient Operating RangeDevice HBM ESD Classification Level 1CDevice CDM ESD Classification Level C4B3 A or 2 A maximum load currentInput Voltage Range from 3.5 V to 36 V:Transients to 42 VOutput Voltage Options: 5 V, 3.3 V, ADJ2.1 MHz Fixed Switching Frequency±2% Output Voltage Tolerance–40°C to 150°C Junction Temperature Range1.7 µA Shutdown Current (typical)24 µA Input Supply Current at No Load (typical)No external Feed-back Divider Required for 5 V or3.3 V outputReset Output With Filter and DelayAutomatic Light Load Mode for ImprovedEfficiencyUser-Selectable Forced PWM mode (FPWM)Built-in Loop Compensation, Soft-start, CurrentLimit, Thermal Shutdown, UVLO, and ExternalFrequency SynchronizationThermally Enhanced 16-lead Package:5 mm × 4.4 mm × 1 mmThe LM53603-Q1, LM53602-Q1 are available asAEC-Q1-Qualified Automotive Grade ProductsWith Following Results:Device Temperature Grade 1: –40°C to +125°CAmbient Operating RangeDevice HBM ESD Classification Level 1CDevice CDM ESD Classification Level C4B3 A or 2 A maximum load currentInput Voltage Range from 3.5 V to 36 V:Transients to 42 VOutput Voltage Options: 5 V, 3.3 V, ADJ2.1 MHz Fixed Switching Frequency±2% Output Voltage Tolerance–40°C to 150°C Junction Temperature Range1.7 µA Shutdown Current (typical)24 µA Input Supply Current at No Load (typical)No external Feed-back Divider Required for 5 V or3.3 V outputReset Output With Filter and DelayAutomatic Light Load Mode for ImprovedEfficiencyUser-Selectable Forced PWM mode (FPWM)Built-in Loop Compensation, Soft-start, CurrentLimit, Thermal Shutdown, UVLO, and ExternalFrequency SynchronizationThermally Enhanced 16-lead Package:5 mm × 4.4 mm × 1 mm

Description

The LM53603-Q1, LM53602-Q1 buck regulators are specifically designed for automotive applications, providing an output voltage of 5 V or 3.3 V (with ADJ option) at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the automotive customer. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. An open drain reset output, with filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes, along with a no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads. The LM53603-Q1, LM53602-Q1 buck regulators are specifically designed for automotive applications, providing an output voltage of 5 V or 3.3 V (with ADJ option) at 3 A or 2 A, from an input voltage of up to 36 V. Advanced high-speed circuitry allows the device to regulate from an input of up to 20 V, while providing an output of 5 V at a switching frequency of 2.1 MHz. The innovative architecture allows the device to regulate a 3.3 V output from an input voltage of only 3.5 V. All aspects of this product are optimized for the automotive customer. An input voltage range up to 36 V, with transient tolerance up to 42 V, eases input surge protection design. An open drain reset output, with filtering and delay, provides a true indication of system status. This feature negates the requirement for an additional supervisory component, saving cost and board space. Seamless transition between PWM and PFM modes, along with a no-load operating current of only 24 µA, ensures high efficiency and superior transient response at all loads.