Catalog(4 parts)
| Part | Output Type | Number of Outputs▲▼ | Synchronous Rectifier▲▼ | Mounting Type | Topology | Supplier Device Package | Duty Cycle (Max)▲▼ | Package / Case▲▼ | Package / Case | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Clock Sync▲▼ | Function | Frequency - Switching▲▼ | Control Features | Output Configuration | Output Phases▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Transistor Driver | 1 ul | Through Hole | Buck | 16-PDIP | 1 ul | 0.007619999814778566 m, 0.007619999814778566 m | 16-DIP | 5.5 V | 3 V | Step-Down | 500000 Hz | Current Limit, Enable, Frequency Control, Soft Start | Positive | 1 ul | 0 °C | 85 °C | |||
Transistor Driver | 1 ul | Surface Mount | Buck | 16-SSOP | 1 ul | 16-SSOP (0.154", 3.90mm Width) | 5.5 V | 3 V | Step-Down | 500000 Hz | Current Limit, Enable, Frequency Control, Soft Start | Positive | 1 ul | 0 °C | 85 °C | ||||
Transistor Driver | 1 ul | Surface Mount | Buck | 16-SOIC | 1 ul | 0.003911599982529879 m, 3.900000095367432 ul | 16-SOIC | 5.5 V | 3 V | Step-Down | 500000 Hz | Current Limit, Enable, Frequency Control, Soft Start | Positive | 1 ul | 0 °C | 85 °C | |||
Transistor Driver | 1 ul | Surface Mount | Buck | 16-SSOP | 1 ul | 16-SSOP (0.154", 3.90mm Width) | 5.5 V | 3 V | Step-Down | 500000 Hz | Current Limit, Enable, Frequency Control, Soft Start | Positive | 1 ul | 0 °C | 85 °C |
Key Features
• VOUT Resistor Programmable Down to 0.9 V3.3-V or 5.0-V Input Supply1% DC AccuracyHigh Efficiency Synchronous SwitchingDrives P-Channel (High Side) and N-Channel (Low Side) MOSFETsLossless Programmable Current LimitLogic Compatible ShutdownAPPLICATIONSLocal Microprocessor Core Voltage Power Supplies for Desktop and Notebook ComputersDSP Core or I/O PoweringHigh-Speed GTL Bus RegulationVOUT Resistor Programmable Down to 0.9 V3.3-V or 5.0-V Input Supply1% DC AccuracyHigh Efficiency Synchronous SwitchingDrives P-Channel (High Side) and N-Channel (Low Side) MOSFETsLossless Programmable Current LimitLogic Compatible ShutdownAPPLICATIONSLocal Microprocessor Core Voltage Power Supplies for Desktop and Notebook ComputersDSP Core or I/O PoweringHigh-Speed GTL Bus Regulation
Description
AI
The UCC3585 synchronous buck controller provides flexible high efficiency power conversion for output voltages as low as 0.9 V with ensured ±1% dc accuracy. With an input voltage range of 3.0 V to 5.5 V, it is the ideal choice for 3.3 V only, 5.0 V only, or other low voltage systems. The fixed frequency oscillator is capable of providing practical PWM operation to 500 kHz.
The UCC3585 drives a complementary pair of power MOSFET transistors. A P-channel on the high side, and an N-channel on the low side step down the input voltage at up to 90% efficiency.
A programmable two-level current limiting function is provided by sensing the voltage drop across the high side P-channel MOSFET. This circuit can be configured to provide pulse-by-pulse limiting, timed shutdown after seven consecutive faults, or latch-off after fault detection, allowing maximum application flexibility. The current limit threshold can be programmed over a wide range with a single resistor.
The UCC3585 also includes undervoltage lockout, a logic controlled enable, and softstart functions. The UCC3585 is offered in the 16-pin surface mount and through-hole packages.
The UCC3585 synchronous buck controller provides flexible high efficiency power conversion for output voltages as low as 0.9 V with ensured ±1% dc accuracy. With an input voltage range of 3.0 V to 5.5 V, it is the ideal choice for 3.3 V only, 5.0 V only, or other low voltage systems. The fixed frequency oscillator is capable of providing practical PWM operation to 500 kHz.
The UCC3585 drives a complementary pair of power MOSFET transistors. A P-channel on the high side, and an N-channel on the low side step down the input voltage at up to 90% efficiency.
A programmable two-level current limiting function is provided by sensing the voltage drop across the high side P-channel MOSFET. This circuit can be configured to provide pulse-by-pulse limiting, timed shutdown after seven consecutive faults, or latch-off after fault detection, allowing maximum application flexibility. The current limit threshold can be programmed over a wide range with a single resistor.
The UCC3585 also includes undervoltage lockout, a logic controlled enable, and softstart functions. The UCC3585 is offered in the 16-pin surface mount and through-hole packages.