LM34919C-Q1 Series

Automotive 4.5-50V Wide Vin 600mA 2.6MHz Ultra-Small Constant On-Time Non-Synchronous Buck Regulator

Catalog

Automotive 4.5-50V Wide Vin 600mA 2.6MHz Ultra-Small Constant On-Time Non-Synchronous Buck Regulator

Part	Function	Operating Temperature [Min]	Operating Temperature [Max]	Frequency - Switching	Topology	Voltage - Output (Max) [Max]	Current - Output	Voltage - Input (Min) [Min]	Mounting Type	Package / Case	Supplier Device Package	Number of Outputs	Output Type	Output Configuration	Voltage - Output (Min/Fixed)	Qualification	Grade	Voltage - Input (Max) [Max]	Voltage - Output	Utilized IC / Part	Regulator Topology	Board Type	Outputs and Type	Outputs and Type	Voltage - Input [Min]	Voltage - Input [Max]	Supplied Contents	Main Purpose	Supplier Device Package [y]	Supplier Device Package [x]
Texas Instruments LM34919TLX/NOPB	Step-Down	-40 °C	125 ¯C	2 MHz	Buck	35 V	600 mA	8 V	Surface Mount	10-WFBGA	10-DSBGA	1	Adjustable	Positive	2.5 V
Texas Instruments LM34919CQSDX/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	45 V	600 mA	4.5 V	Surface Mount	12-WFDFN Exposed Pad	12-WSON (4x4)	1	Adjustable	Positive	2.5 V	AEC-Q100	Automotive	50 V
Texas Instruments LM34919TL/NOPB	Step-Down	-40 °C	125 ¯C	2 MHz	Buck	35 V	600 mA	8 V	Surface Mount	10-WFBGA	10-DSBGA	1	Adjustable	Positive	2.5 V
Texas Instruments LM34919BEVAL/NOPB				1.5 MHz			600 mA												3.3 V	LM34919B	Buck	Fully Populated	Non-Isolated	1	6 V	24 V	Board(s)	DC/DC Step Down
Texas Instruments LM34919BTL/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	35 V	600 mA	6 V	Surface Mount	10-WFBGA	10-DSBGA	1	Adjustable	Positive	2.5 V
Texas Instruments LM34919CQTL/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	45 V	600 mA	4.5 V	Surface Mount	12-WFBGA DSBGA	12-DSBGA	1	Adjustable	Positive	2.5 V	AEC-Q100	Automotive	50 V											2.5	2
Texas Instruments LM34919CQSDEVM				1.5 MHz			600 mA												3.3 V	LM34919C-Q1	Buck	Fully Populated	Non-Isolated	1			Board(s)	DC/DC Step Down
Texas Instruments LM34919BQTLX/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	35 V	600 mA	6 V	Surface Mount	10-WFBGA	10-DSBGA	1	Adjustable	Positive	2.5 V	AEC-Q100	Automotive
Texas Instruments LM34919CQSD/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	45 V	600 mA	4.5 V	Surface Mount	12-WFDFN Exposed Pad	12-WSON (4x4)	1	Adjustable	Positive	2.5 V	AEC-Q100	Automotive	50 V
Texas Instruments LM34919BTLX/NOPB	Step-Down	-40 °C	125 ¯C	2.6 MHz	Buck	35 V	600 mA	6 V	Surface Mount	10-WFBGA	10-DSBGA	1	Adjustable	Positive	2.5 V

Catalog

Automotive 4.5-50V Wide Vin 600mA 2.6MHz Ultra-Small Constant On-Time Non-Synchronous Buck Regulator

Key Features

• AEC-Q100 qualified (Tj = –40°C to 125°C)Maximum Switching Frequency: 2.6 MHzInput Voltage Range: 4.5 V to 50 VIntegrated N-Channel buck switchIntegrated Start-Up RegulatorNo Loop Compensation RequiredUltra-Fast Transient ResponseOperating Frequency Remains Constant withLoad Current and Input VoltageAdjustable Output VoltagePower Good OutputEnable InputValley Current Limit at 0.64 A TypicalPrecision Internal Voltage ReferenceLow IQShutdown (<10 µA)Highly Efficient OperationThermal Shutdown12-Bump 2 mm × 2 mm DSBGA and 12-pin 4mm × 4 mm WSON PackagesAEC-Q100 qualified (Tj = –40°C to 125°C)Maximum Switching Frequency: 2.6 MHzInput Voltage Range: 4.5 V to 50 VIntegrated N-Channel buck switchIntegrated Start-Up RegulatorNo Loop Compensation RequiredUltra-Fast Transient ResponseOperating Frequency Remains Constant withLoad Current and Input VoltageAdjustable Output VoltagePower Good OutputEnable InputValley Current Limit at 0.64 A TypicalPrecision Internal Voltage ReferenceLow IQShutdown (<10 µA)Highly Efficient OperationThermal Shutdown12-Bump 2 mm × 2 mm DSBGA and 12-pin 4mm × 4 mm WSON Packages

Description

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter. The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.