LM5005 Series

7-75V Wide Vin, 2.5A Current Mode Non-Synchronous Buck Regulator

Catalog

7-75V Wide Vin, 2.5A Current Mode Non-Synchronous Buck Regulator

Part	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Voltage - Input (Max) [Max]	Mounting Type	Output Configuration	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Package / Case	Package / Case [custom]	Package / Case	Function	Output Type	Current - Output	Topology	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Supplier Device Package
Texas Instruments LM5005MH	-40 °C	125 ¯C	1	75 V	Surface Mount	Positive	7 V	500 kHz	50 kHz	20-PowerTSSOP	4.4 mm	0.173 in	Step-Down	Adjustable	2.5 A	Buck	1.225 V	70 V	20-HTSSOP
Texas Instruments LM5005MH/NOPB	-40 °C	125 ¯C	1	75 V	Surface Mount	Positive	7 V	500 kHz	50 kHz	20-PowerTSSOP	4.4 mm	0.173 in	Step-Down	Adjustable	2.5 A	Buck	1.225 V	70 V	20-HTSSOP
Texas Instruments LM5005MHX/NOPB	-40 °C	125 ¯C	1	75 V	Surface Mount	Positive	7 V	500 kHz	50 kHz	20-PowerTSSOP	4.4 mm	0.173 in	Step-Down	Adjustable	2.5 A	Buck	1.225 V	70 V	20-HTSSOP

Catalog

7-75V Wide Vin, 2.5A Current Mode Non-Synchronous Buck Regulator

Key Features

• High-Efficiency DC-DC Buck ConverterWide Input Voltage Range From 7 V to 75 VAdjustable Output Voltage as Low as 1.225 VOutput Current as High as 2.5 AJunction Temperature Range –40°C to 125°CIntegrated 75-V, 160-mΩ Buck MOSFETMeets EN55022 and CISPR 22 EMI Standards±1.5% Feedback Voltage AccuracyEmulated Peak Current-Mode ControlUltra-Fast Line and Load Transient ResponseSwitching Frequency From 50 kHz to 500 kHzMaster or Slave Frequency Synchronization Input80-ns Minimum PWM ON Time For Low VOUTMonotonic Start-up into Prebiased OutputInternal High-Voltage VCC Bias Supply RegulatorAuxiliary Bias Supply Option to VCCConfigurable Soft Start With TrackingPrecision Standby and Shutdown InputProgrammable Input UVLO With HysteresisRemote Shutdown and Standby ControlCycle-by-Cycle Overcurrent ProtectionVCC and Gate Drive UVLO ProtectionThermal Shutdown Protection With HysteresisThermally-Enhanced 20-Pin HTSSOP PackageHigh-Efficiency DC-DC Buck ConverterWide Input Voltage Range From 7 V to 75 VAdjustable Output Voltage as Low as 1.225 VOutput Current as High as 2.5 AJunction Temperature Range –40°C to 125°CIntegrated 75-V, 160-mΩ Buck MOSFETMeets EN55022 and CISPR 22 EMI Standards±1.5% Feedback Voltage AccuracyEmulated Peak Current-Mode ControlUltra-Fast Line and Load Transient ResponseSwitching Frequency From 50 kHz to 500 kHzMaster or Slave Frequency Synchronization Input80-ns Minimum PWM ON Time For Low VOUTMonotonic Start-up into Prebiased OutputInternal High-Voltage VCC Bias Supply RegulatorAuxiliary Bias Supply Option to VCCConfigurable Soft Start With TrackingPrecision Standby and Shutdown InputProgrammable Input UVLO With HysteresisRemote Shutdown and Standby ControlCycle-by-Cycle Overcurrent ProtectionVCC and Gate Drive UVLO ProtectionThermal Shutdown Protection With HysteresisThermally-Enhanced 20-Pin HTSSOP Package

Description

The LM5005 high-voltage buck converter features all of the functions necessary to implement an efficient high-voltage switching regulator with a minimum number of external components. This easy-to-use converter operates over an input voltage range from 7 V to 75 V and delivers a maximum output current of 2.5 A. The control loop architecture is based upon current-mode control using an emulated current ramp for high noise immunity. Current-mode control provides inherent line feed-forward, cycle-by-cycle overcurrent protection and straightforward loop compensation. The use of an emulated control ramp reduces noise sensitivity of the PWM circuit, allowing reliable control of small duty cycles necessary in high input voltage applications. The switching frequency is resistor-programmable from 50 kHz to 500 kHz. To reduce EMI, an oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or be synchronized to an external clock signal. Additional protection features include configurable soft start, external power supply tracking, thermal shutdown with automatic recovery, and remote shutdown capability. The LM5005 is available in an 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a low junction-to-board thermal impedance. To create a custom regulator design, use the LM5005 with WEBENCH®Power Designer. The LM5005 high-voltage buck converter features all of the functions necessary to implement an efficient high-voltage switching regulator with a minimum number of external components. This easy-to-use converter operates over an input voltage range from 7 V to 75 V and delivers a maximum output current of 2.5 A. The control loop architecture is based upon current-mode control using an emulated current ramp for high noise immunity. Current-mode control provides inherent line feed-forward, cycle-by-cycle overcurrent protection and straightforward loop compensation. The use of an emulated control ramp reduces noise sensitivity of the PWM circuit, allowing reliable control of small duty cycles necessary in high input voltage applications. The switching frequency is resistor-programmable from 50 kHz to 500 kHz. To reduce EMI, an oscillator synchronization pin allows multiple LM5005 regulators to self-synchronize or be synchronized to an external clock signal. Additional protection features include configurable soft start, external power supply tracking, thermal shutdown with automatic recovery, and remote shutdown capability. The LM5005 is available in an 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a low junction-to-board thermal impedance. To create a custom regulator design, use the LM5005 with WEBENCH®Power Designer.