LM34926 Series

7.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Catalog

7.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Part	Package / Case	Supplier Device Package	Output Configuration	Mounting Type	Function	Voltage - Input (Max) [Max]	Number of Outputs	Topology	Output Type	Frequency - Switching	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Current - Output	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input [Min]	Voltage - Input [Max]	Board Type	Outputs and Type	Frequency - Switching	Regulator Topology	Main Purpose	Supplied Contents	Voltage - Output [Min]	Voltage - Output [Max]	Utilized IC / Part	Package / Case [y]	Package / Case [x]
Texas Instruments LM34926SDX/NOPB	8-WDFN Exposed Pad	8-WSON (4x4)	Isolation Capable Positive	Surface Mount	Step-Down	100 V	1	Buck	Adjustable	Adj to 1MHz	7.5 V	1.225 V	100 V	300 mA	-40 °C	125 ¯C
Texas Instruments LM34926EVAL/NOPB														250 mA			20 VDC	100 V	Fully Populated	1 1	750 kHz	Buck	DC/DC Step Down	Board(s)	9.5 V	10 V	LM34926
Texas Instruments LM34926MRX/NOPB	8-PowerSOIC	8-SO PowerPad	Isolation Capable Positive	Surface Mount	Step-Down	100 V	1	Buck	Adjustable	Adj to 1MHz	7.5 V	1.225 V	100 V	300 mA	-40 °C	125 ¯C												3.9 mm	0.154 in
Texas Instruments LM34926SD/NOPB	8-WDFN Exposed Pad	8-WSON (4x4)	Isolation Capable Positive	Surface Mount	Step-Down	100 V	1	Buck	Adjustable	Adj to 1MHz	7.5 V	1.225 V	100 V	300 mA	-40 °C	125 ¯C

Catalog

7.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Key Features

• Wide 7.5-V to 100-V Input RangeIntegrated 300-mA High-Sideand Low-Side SwitchesNo Schottky RequiredConstant On-Time ControlNo Loop Compensation RequiredUltra-Fast Transient ResponseNearly Constant Operating FrequencyIntelligent Peak Current LimitAdjustable Output Voltage From 1.225 VPrecision 2% Feedback ReferenceFrequency Adjustable to 1 MHzAdjustable Undervoltage Lockout (UVLO)Remote ShutdownThermal ShutdownPackages:WSON-8SO PowerPAD™-8 PackagesCreate a Custom Design Using the LM34926 With theWEBENCH®Power DesignerWide 7.5-V to 100-V Input RangeIntegrated 300-mA High-Sideand Low-Side SwitchesNo Schottky RequiredConstant On-Time ControlNo Loop Compensation RequiredUltra-Fast Transient ResponseNearly Constant Operating FrequencyIntelligent Peak Current LimitAdjustable Output Voltage From 1.225 VPrecision 2% Feedback ReferenceFrequency Adjustable to 1 MHzAdjustable Undervoltage Lockout (UVLO)Remote ShutdownThermal ShutdownPackages:WSON-8SO PowerPAD™-8 PackagesCreate a Custom Design Using the LM34926 With theWEBENCH®Power Designer

Description

The LM34926 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The constant on-time (COT) control scheme employed in the LM34926 requires no loop compensation and provides excellent transient response. The regulator operates with an on-time control that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCCUndervoltage Lockout (UVLO). The LM34926 device is offered in WSON-8 and SO PowerPAD-8 plastic packages. The LM34926 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The constant on-time (COT) control scheme employed in the LM34926 requires no loop compensation and provides excellent transient response. The regulator operates with an on-time control that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCCUndervoltage Lockout (UVLO). The LM34926 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.