Catalog(2 parts)
| Part | Current - Output▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Package / Case | Mounting Type | Synchronous Rectifier▲▼ | Topology | Number of Outputs▲▼ | Frequency - Switching▲▼ | Voltage - Input (Max)▲▼ | Voltage - Input (Min)▲▼ | Function | Supplier Device Package | Output Configuration |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6 A | 125 °C | -40 °C | 13-VFQFN Exposed Pad | Surface Mount | Buck | 1 ul | 2000000 Hz | 18 V | 4.5 V | Step-Down | 13-VQFN (3x3) | Positive | ||
6 A | 125 °C | -40 °C | 13-VFQFN Exposed Pad | Surface Mount | Buck | 1 ul | 2000000 Hz | 18 V | 4.5 V | Step-Down | 13-VQFN (3x3) | Positive |
Key Features
• Fully Integrated Power Switches With Drivers for Single and Multiphase Synchronous Buck ConvertersFull Compatibility With TI Fusion Digital Power Supply Controllers, (UCD91xx and UCD92xx Families)Compatible With Analog Domain ControllersWide Input Voltage Range:4.5 V to 14 VOperational Down to 2.2-V Input With an External Bias SupplyUp to 6-A Output CurrentOperational to 2-MHz Switching FrequencyCurrent Limit With Current Limit FlagOnboard Regulated 6-V Driver Supply From VINThermal Protection and MonitoringFully Integrated Power Switches With Drivers for Single and Multiphase Synchronous Buck ConvertersFull Compatibility With TI Fusion Digital Power Supply Controllers, (UCD91xx and UCD92xx Families)Compatible With Analog Domain ControllersWide Input Voltage Range:4.5 V to 14 VOperational Down to 2.2-V Input With an External Bias SupplyUp to 6-A Output CurrentOperational to 2-MHz Switching FrequencyCurrent Limit With Current Limit FlagOnboard Regulated 6-V Driver Supply From VINThermal Protection and Monitoring
Description
AI
The UCD74106 is a complete power system ready to drive a buck power supply (). High-side MOSFETs, low-side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to 6.25 V by an internally regulated VGGsupply. The internal VGGregulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2 V to 18 V. Internal Under Voltage Lockout (UVLO) logic insures VGGis good before allowing chip operation.
A drive logic block allows operation in one of two modes. In synchronous mode, the logic block uses the PWM signal to control both the high-side and low-side gate drive signals. Dead time is optimized to prevent cross conduction. The synchronous rectifier enable (SRE) pin controls whether or not the low-side FET is turned on when the PWM signal is low.
The UCD74106 is a complete power system ready to drive a buck power supply (). High-side MOSFETs, low-side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to 6.25 V by an internally regulated VGGsupply. The internal VGGregulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2 V to 18 V. Internal Under Voltage Lockout (UVLO) logic insures VGGis good before allowing chip operation.
A drive logic block allows operation in one of two modes. In synchronous mode, the logic block uses the PWM signal to control both the high-side and low-side gate drive signals. Dead time is optimized to prevent cross conduction. The synchronous rectifier enable (SRE) pin controls whether or not the low-side FET is turned on when the PWM signal is low.