LM5085SDX/NOPB
Active4.5-75V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER
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LM5085SDX/NOPB
Active4.5-75V WIDE VIN, CONSTANT ON-TIME NON-SYNCHRONOUS PFET BUCK CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5085SDX/NOPB |
|---|---|
| Clock Sync | False |
| Control Features | On Time Control, Enable, Current Limit |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 1 MHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 8-WFDFN Exposed Pad |
| Supplier Device Package | 8-WSON (3x3) |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 75 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
LM5085-Q1 Series
Automotive Grade 4.5-75V Wide Vin, Constant On-Time Non-Synchronous PFET Buck Controller
| Part | Synchronous Rectifier | Frequency - Switching [Max] | Output Phases | Function | Voltage - Supply (Vcc/Vdd) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Clock Sync | Operating Temperature [Min] | Operating Temperature [Max] | Output Type | Control Features | Topology | Mounting Type | Number of Outputs | Package / Case | Package / Case [custom] | Package / Case | Output Configuration | Duty Cycle (Max) [Max] | Voltage - Output | Main Purpose | Current - Output | Voltage - Input [Min] | Voltage - Input [Max] | Board Type | Regulator Topology | Frequency - Switching | Utilized IC / Part | Supplied Contents | Outputs and Type | Outputs and Type | Package / Case [custom] | Supplier Device Package | Qualification | Grade |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-TSSOP | 0.118 in | 3 mm | Positive | 100 % | ||||||||||||||||||
 Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-TSSOP | 0.118 in | 3 mm | Positive | 100 % | ||||||||||||||||||
 Texas Instruments | 5 V | DC/DC Step Down | 4.5 A | 5.5 V | 55 V | Fully Populated | Buck | 300 kHz | LM5085 | Board(s) | Non-Isolated | 1 | |||||||||||||||||||||||
 Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-PowerTSSOP | 0.118 in | Positive | 100 % | 3 mm | 8-HVSSOP | |||||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-WFDFN Exposed Pad | Positive | 100 % | 8-WSON (3x3) | |||||||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-PowerTSSOP | 0.118 in | Positive | 100 % | 3 mm | 8-HVSSOP | AEC-Q100 | Automotive | |||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-WFDFN Exposed Pad | Positive | 100 % | 8-WSON (3x3) | |||||||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-TSSOP | 0.118 in | 3 mm | Positive | 100 % | ||||||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-WFDFN Exposed Pad | Positive | 100 % | 8-WSON (3x3) | |||||||||||||||||||
Texas Instruments | 1 MHz | 1 | Step-Down | 75 V | 4.5 V | -40 °C | 125 ¯C | Transistor Driver | Current Limit Enable On Time Control | Buck | Surface Mount | 1 | 8-MSOP 8-PowerTSSOP | 0.118 in | Positive | 100 % | 3 mm | 8-HVSSOP |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.45 | |
| 10 | $ 2.20 | |||
| 25 | $ 2.08 | |||
| 100 | $ 1.77 | |||
| 250 | $ 1.66 | |||
| 500 | $ 1.45 | |||
| 1000 | $ 1.21 | |||
| Digi-Reel® | 1 | $ 2.45 | ||
| 10 | $ 2.20 | |||
| 25 | $ 2.08 | |||
| 100 | $ 1.77 | |||
| 250 | $ 1.66 | |||
| 500 | $ 1.45 | |||
| 1000 | $ 1.21 | |||
| Tape & Reel (TR) | 4500 | $ 1.12 | ||
| 9000 | $ 1.08 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.84 | |
| 100 | $ 1.52 | |||
| 250 | $ 1.09 | |||
| 1000 | $ 0.82 | |||
Description
General part information
LM5085-Q1 Series
The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON)of the PFET or an external sense resistor can be used to sense current for over-current detection.
The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON)of the PFET or an external sense resistor can be used to sense current for over-current detection.
Documents
Technical documentation and resources