LM5117-Q1 Series
Automotive Grade 5.5-65V Wide Vin, Current Mode Synchronous Buck Controller w Analog Current Monitor
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Automotive Grade 5.5-65V Wide Vin, Current Mode Synchronous Buck Controller w Analog Current Monitor
| Part | Topology | Qualification | Number of Outputs | Function | Voltage - Supply (Vcc/Vdd) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Supplier Device Package | Output Type | Operating Temperature [Max] | Operating Temperature [Min] | Clock Sync | Grade | Control Features | Output Configuration | Frequency - Switching | Synchronous Rectifier | Package / Case [custom] | Package / Case | Package / Case [custom] | Mounting Type | Output Phases |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LM5117QPMH/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 20-HTSSOP | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 0.173 in | 20-PowerTSSOP | 4.4 mm | Surface Mount | 1 | ||
Texas Instruments LM5117QPSQ/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 24-WQFN (4x4) | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 24-WFQFN Exposed Pad | Surface Mount | 1 | ||||
Texas Instruments LM5117QPMHE/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 20-HTSSOP | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 0.173 in | 20-PowerTSSOP | 4.4 mm | Surface Mount | 1 | ||
Texas Instruments LM5117QPSQX/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 24-WQFN (4x4) | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 24-WFQFN Exposed Pad | Surface Mount | 1 | ||||
Texas Instruments LM5117QPMHX/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 20-HTSSOP | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 0.173 in | 20-PowerTSSOP | 4.4 mm | Surface Mount | 1 | ||
Texas Instruments LM5117QPSQE/NOPB | Buck | AEC-Q100 | 1 | Step-Down | 65 V | 5.5 V | 24-WQFN (4x4) | Transistor Driver | 125 ¯C | -40 °C | Automotive | Frequency Control, Ramp, Soft Start | Positive | 200 kHz, 480 kHz | 24-WFQFN Exposed Pad | Surface Mount | 1 |
Key Features
• LM5117-Q1 is Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: -40°C to 125°CAmbient Operating Temperature RangeEmulated Peak Current Mode ControlWide Operating Range from 5.5 V to 65 VRobust 3.3-A Peak Gate DrivesAdaptive Dead-Time Output Driver ControlFree-Run or Synchronizable Clock up to 750 kHzOptional Diode Emulation ModeProgrammable Output from 0.8 VPrecision 1.5% Voltage ReferenceAnalog Current MonitorProgrammable Current LimitHiccup Mode Overcurrent ProtectionProgrammable Soft-Start and TrackingProgrammable Line Undervoltage LockoutProgrammable Switchover to External Bias SupplyThermal ShutdownLM5117-Q1 is Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: -40°C to 125°CAmbient Operating Temperature RangeEmulated Peak Current Mode ControlWide Operating Range from 5.5 V to 65 VRobust 3.3-A Peak Gate DrivesAdaptive Dead-Time Output Driver ControlFree-Run or Synchronizable Clock up to 750 kHzOptional Diode Emulation ModeProgrammable Output from 0.8 VPrecision 1.5% Voltage ReferenceAnalog Current MonitorProgrammable Current LimitHiccup Mode Overcurrent ProtectionProgrammable Soft-Start and TrackingProgrammable Line Undervoltage LockoutProgrammable Switchover to External Bias SupplyThermal Shutdown
Description
AI
The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
The operating frequency is programmable from 50 kHz to 750 kHz. The LM5117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.
The LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.
The operating frequency is programmable from 50 kHz to 750 kHz. The LM5117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.