LM5166 Series
3V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
3V-65V Input, 500mA Synchronous Buck Converter With Ultra-Low Iq
| Part | Voltage - Input (Min) [Min] | Number of Outputs | Supplier Device Package | Topology | Current - Output | Mounting Type | Function | Voltage - Output (Max) [Max] | Synchronous Rectifier | Voltage - Input (Max) [Max] | Package / Case | Output Type | Output Configuration | Operating Temperature [Max] | Operating Temperature [Min] | Voltage - Output (Min/Fixed) [Min] | Frequency - Switching [Max] | Frequency - Switching [Min] | Voltage - Output (Min/Fixed) | Output Type | Frequency - Switching | Board Type | Voltage - Input [Max] | Voltage - Input [Min] | Supplied Contents | Outputs and Type | Outputs and Type | Main Purpose | Voltage - Output | Utilized IC / Part |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments LM5166DRCR | 3 V | 1 | 10-VSON (3x3) | Buck | 500 mA | Surface Mount | Step-Down | 65 V | 65 V | 10-VFDFN Exposed Pad | Adjustable | Positive | 150 C | -40 °C | 1.23 V | 600 kHz | 50 kHz | |||||||||||||
Texas Instruments LM5166XDRCT | 3 V | 1 | 10-VSON (3x3) | Buck | 500 mA | Surface Mount | Step-Down | 65 V | 10-VFDFN Exposed Pad | Positive | 150 C | -40 °C | 600 kHz | 50 kHz | 5 V | 27.03 °C/W | ||||||||||||||
Texas Instruments LM5166EVM-C33A | 500 mA | 200 kHz | Fully Populated | 65 V | 4.5 V | Board(s) | Non-Isolated | 1 | DC/DC, Step Down | 3.3 V | LM5166 | |||||||||||||||||||
Texas Instruments LM5166EVM-C50A | 500 mA | 100 kHz | Fully Populated | 65 V | 6 V | Board(s) | Non-Isolated | 1 | DC/DC, Step Down | 5 V | LM5166 | |||||||||||||||||||
Texas Instruments LM5166YDRCT | 3 V | 1 | 10-VSON (3x3) | Buck | 500 mA | Surface Mount | Step-Down | 65 V | 10-VFDFN Exposed Pad | Positive | 150 C | -40 °C | 600 kHz | 50 kHz | 3.3 V | 27.03 °C/W | ||||||||||||||
Texas Instruments LM5166DRCT | 3 V | 1 | 10-VSON (3x3) | Buck | 500 mA | Surface Mount | Step-Down | 65 V | 65 V | 10-VFDFN Exposed Pad | Adjustable | Positive | 150 C | -40 °C | 1.23 V | 600 kHz | 50 kHz |
Key Features
• Wide Input Voltage Range of 3 V to 65 V9.7-µA No-Load Quiescent Current–40°C to 150°C Junction Temperature RangeFixed (3.3-V, 5-V) or Adjustable VOUTOptionsMeets EN55022 / CISPR 22 EMI StandardsIntegrated 1-Ω PFET Buck SwitchSupports 100% Duty Cycle for Low DropoutIntegrated 0.5-Ω NFET Synchronous RectifierEliminates External Schottky DiodeProgrammable Peak Current Limit Supports:500-mA, 300-mA, or 200-mA LoadsSelectable PFM or COT Mode Operation1.223-V ±1.2% Internal Voltage ReferenceSwitching Frequency up to 600 kHz900-µs Internal or Externally-Adjustable Soft StartDiode Emulation and Pulse Skipping for Ultra-High Light-Load EfficiencyNo Loop Compensation or Bootstrap ComponentsPrecision Enable and Input UVLO With HysteresisOpen-Drain Power Good IndicatorThermal Shutdown Protection With HysteresisPin-to-Pin Compatible With theLM516510-Pin, 3-mm × 3-mm VSON PackageCreate a Custom Regulator Design UsingWEBENCH®Power DesignerWide Input Voltage Range of 3 V to 65 V9.7-µA No-Load Quiescent Current–40°C to 150°C Junction Temperature RangeFixed (3.3-V, 5-V) or Adjustable VOUTOptionsMeets EN55022 / CISPR 22 EMI StandardsIntegrated 1-Ω PFET Buck SwitchSupports 100% Duty Cycle for Low DropoutIntegrated 0.5-Ω NFET Synchronous RectifierEliminates External Schottky DiodeProgrammable Peak Current Limit Supports:500-mA, 300-mA, or 200-mA LoadsSelectable PFM or COT Mode Operation1.223-V ±1.2% Internal Voltage ReferenceSwitching Frequency up to 600 kHz900-µs Internal or Externally-Adjustable Soft StartDiode Emulation and Pulse Skipping for Ultra-High Light-Load EfficiencyNo Loop Compensation or Bootstrap ComponentsPrecision Enable and Input UVLO With HysteresisOpen-Drain Power Good IndicatorThermal Shutdown Protection With HysteresisPin-to-Pin Compatible With theLM516510-Pin, 3-mm × 3-mm VSON PackageCreate a Custom Regulator Design UsingWEBENCH®Power Designer
Description
AI
TheLM5166is a compact, easy-to-use, 3-V to 65-V, ultra-low IQsynchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 500 mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V, or an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse frequency modulation (PFM) mode is selected for optimal light-load efficiency or constant on-time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.
The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular load current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5166 is available in a 10-pin VSON package with 0.5-mm pin pitch.
TheLM5166is a compact, easy-to-use, 3-V to 65-V, ultra-low IQsynchronous buck converter with high efficiency over wide input voltage and load current ranges. With integrated high-side and low-side power MOSFETs, up to 500 mA of output current can be delivered at fixed output voltages of 3.3 V or 5 V, or an adjustable output. The converter is designed to simplify implementation while providing options to optimize the performance for the target application. Pulse frequency modulation (PFM) mode is selected for optimal light-load efficiency or constant on-time (COT) control for nearly constant operating frequency. Both control schemes do not require loop compensation while providing excellent line and load transient response and short PWM on-time for large step-down conversion ratios.
The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltage and does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint is adjustable to optimize inductor selection for a particular load current requirement. Selectable and adjustable start-up timing options include minimum delay (no soft start), internally fixed (900 µs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can be used for sequencing, fault reporting, and output voltage monitoring. The LM5166 is available in a 10-pin VSON package with 0.5-mm pin pitch.