LM5115A Series

75V, Secondary Side Post Regulator/ Synchronous Buck Controller with Power-Up/Power-Down Tracking

Catalog

75V, Secondary Side Post Regulator/ Synchronous Buck Controller with Power-Up/Power-Down Tracking

Part	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Voltage - Supply [Max]	Voltage - Supply [Min]	Applications	Supplier Device Package	Mounting Type	Voltage - Input [Min]	Voltage - Input [Max]	Current - Supply	Voltage - Output	Current - Output	Regulator Topology	Main Purpose	Board Type	Frequency - Switching	Outputs and Type	Outputs and Type	Utilized IC / Part	Supplied Contents	Package / Case [x]	Package / Case [y]
Texas Instruments LM5115SDX	125 °C	-40 °C	16-WFDFN Exposed Pad	7.5 V	5 V	Secondary-Side Controller	16-WSON (5x5)	Surface Mount	5 V	30 V	4 mA
Texas Instruments LM5115DC EVAL									7 V	70 V		5 V	6 A	Buck	DC/DC Step Down	Fully Populated	215 kHz	Non-Isolated	1	LM5115	Board(s)
Texas Instruments LM5115SD/NOPB	125 °C	-40 °C	16-WFDFN Exposed Pad	7.5 V	5 V	Secondary-Side Controller	16-WSON (5x5)	Surface Mount	5 V	30 V	4 mA
Texas Instruments LM5115SDX/NOPB	125 °C	-40 °C	16-WFDFN Exposed Pad	7.5 V	5 V	Secondary-Side Controller	16-WSON (5x5)	Surface Mount	5 V	30 V	4 mA
Texas Instruments LM5115MTCX/NOPB	125 °C	-40 °C	16-TSSOP	7.5 V	5 V	Secondary-Side Controller	16-TSSOP	Surface Mount	5 V	30 V	4 mA											0.173 in	4.4 mm
Texas Instruments LM5115AMT/NOPB	125 °C	-40 °C	16-TSSOP	7.5 V	5 V	Secondary-Side Controller	16-TSSOP	Surface Mount	5 V	30 V	4 mA											0.173 in	4.4 mm
Texas Instruments LM5115AEVAL									4.5 V	30 V		2.5 V	9 A	Buck	DC/DC Step Down	Fully Populated		Non-Isolated	1	LM5115A	Board(s)
Texas Instruments LM5115AMTX/NOPB	125 °C	-40 °C	16-TSSOP	7.5 V	5 V	Secondary-Side Controller	16-TSSOP	Surface Mount	5 V	30 V	4 mA											0.173 in	4.4 mm
Texas Instruments LM5115SD	125 °C	-40 °C	16-WFDFN Exposed Pad	7.5 V	5 V	Secondary-Side Controller	16-WSON (5x5)	Surface Mount	5 V	30 V	4 mA
Texas Instruments LM5115AMTX	125 °C	-40 °C	16-TSSOP	7.5 V	5 V	Secondary-Side Controller	16-TSSOP	Surface Mount	5 V	30 V	4 mA											0.173 in	4.4 mm

Catalog

75V, Secondary Side Post Regulator/ Synchronous Buck Controller with Power-Up/Power-Down Tracking

Key Features

• Self-Synchronization to Main Channel OutputStandalone DC/DC Synchronous Buck ModeLeading Edge Pulse Width ModulationVoltage-Mode Control with Current Injection and Input Line Feed-ForwardOperates from AC or DC Input up to 75VWide 4.5V to 30V Bias Supply RangeWide 0.75V to 13.5V Output Range.Top and Bottom Gate Drivers Sink 2.5A PeakAdaptive Gate Driver Dead-Time ControlWide Bandwidth Error Amplifier (4MHz)Programmable Soft-StartThermal Shutdown ProtectionTSSOP-16 or Thermally Enhanced WSON-16 PackagesAll trademarks are the property of their respective owners.Self-Synchronization to Main Channel OutputStandalone DC/DC Synchronous Buck ModeLeading Edge Pulse Width ModulationVoltage-Mode Control with Current Injection and Input Line Feed-ForwardOperates from AC or DC Input up to 75VWide 4.5V to 30V Bias Supply RangeWide 0.75V to 13.5V Output Range.Top and Bottom Gate Drivers Sink 2.5A PeakAdaptive Gate Driver Dead-Time ControlWide Bandwidth Error Amplifier (4MHz)Programmable Soft-StartThermal Shutdown ProtectionTSSOP-16 or Thermally Enhanced WSON-16 PackagesAll trademarks are the property of their respective owners.

Description

The LM5115 is a versatile switching regulator controller. It has two main application configurations. The first is utilizing the Secondary Side Post Regulation (SSPR) technique to implement multiple output power converters. In the second configuration, it can be used as a standalone synchronous buck controller (Please see for more details). The SSPR technique develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of an isolated power converter. Regulation of the auxiliary output voltage is achieved by leading edge pulse width modulation (PWM) of the main channel duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of the main output. The LM5115 drives external high side and low side NMOS power switches configured as a synchronous buck regulator. A current sense amplifier provides overload protection and operates over a wide common mode input range. Additional features include a low dropout (LDO) bias regulator, error amplifier, precision reference, adaptive dead time control of the gate signals and thermal shutdown. The LM5115 is a versatile switching regulator controller. It has two main application configurations. The first is utilizing the Secondary Side Post Regulation (SSPR) technique to implement multiple output power converters. In the second configuration, it can be used as a standalone synchronous buck controller (Please see for more details). The SSPR technique develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of an isolated power converter. Regulation of the auxiliary output voltage is achieved by leading edge pulse width modulation (PWM) of the main channel duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of the main output. The LM5115 drives external high side and low side NMOS power switches configured as a synchronous buck regulator. A current sense amplifier provides overload protection and operates over a wide common mode input range. Additional features include a low dropout (LDO) bias regulator, error amplifier, precision reference, adaptive dead time control of the gate signals and thermal shutdown.