LM34927 Series

7.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Catalog

7.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Part	Board Type	Current - Output	Frequency - Switching	Outputs and Type	Voltage - Input [Min]	Voltage - Input [Max]	Utilized IC / Part	Supplied Contents	Main Purpose	Voltage - Output [Min]	Voltage - Output [Max]	Regulator Topology	Voltage - Input (Min) [Min]	Voltage - Output (Max) [Max]	Supplier Device Package	Mounting Type	Topology	Voltage - Output (Min/Fixed)	Function	Output Type	Number of Outputs	Output Configuration	Voltage - Input (Max) [Max]	Package / Case [y]	Package / Case [x]	Package / Case	Frequency - Switching	Operating Temperature [Min]	Operating Temperature [Max]
Texas Instruments LM34927EVAL/NOPB	Fully Populated	300 mA	750 kHz	1 1	20 VDC	100 V	LM34927	Board(s)	DC/DC Step Down	9.5 V	10 V	Buck
Texas Instruments LM34927MR/NOPB		600 mA											7.5 V	100 V	8-SO PowerPad	Surface Mount	Buck	1.225 V	Step-Down	Adjustable	1	Isolation Capable Positive	100 V	3.9 mm	0.154 in	8-PowerSOIC	Adj to 1MHz	-40 °C	125 ¯C
Texas Instruments LM34927MRX/NOPB		600 mA											7.5 V	100 V	8-SO PowerPad	Surface Mount	Buck	1.225 V	Step-Down	Adjustable	1	Isolation Capable Positive	100 V	3.9 mm	0.154 in	8-PowerSOIC	Adj to 1MHz	-40 °C	125 ¯C
Texas Instruments LM34927SD/NOPB		600 mA											7.5 V	100 V	8-WSON (4x4)	Surface Mount	Buck	1.225 V	Step-Down	Adjustable	1	Isolation Capable Positive	100 V			8-WDFN Exposed Pad	Adj to 1MHz	-40 °C	125 ¯C
Texas Instruments LM34927SDX/NOPB		600 mA											7.5 V	100 V	8-WSON (4x4)	Surface Mount	Buck	1.225 V	Step-Down	Adjustable	1	Isolation Capable Positive	100 V			8-WDFN Exposed Pad	Adj to 1MHz	-40 °C	125 ¯C

Catalog

7.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Key Features

• Wide 7.5-V to 100-V Input RangeIntegrated 600-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:8-pin WSON8-pin SO PowerPAD™Wide 7.5-V to 100-V Input RangeIntegrated 600-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:8-pin WSON8-pin SO PowerPAD™

Description

The LM34927 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 LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time 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 LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages. The LM34927 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 LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time 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 LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.