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AC/DC & DC/DC controllers (external FET)

UCC3585

不推薦在新設計中採用

低壓同步降壓控制器

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產品規格表

UCC3585

不推薦在新設計中採用
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 3 Vin (max) (V) 5.5 Iout (max) (A) 0.5 Operating temperature range (°C) 0 to 85 Rating Catalog Vout (min) (V) 0.9 Vout (max) (V) 5 Iq (typ) (A) 0.0023 Duty cycle (max) (%) 100
Vin (min) (V) 3 Vin (max) (V) 5.5 Iout (max) (A) 0.5 Operating temperature range (°C) 0 to 85 Rating Catalog Vout (min) (V) 0.9 Vout (max) (V) 5 Iq (typ) (A) 0.0023 Duty cycle (max) (%) 100
SOIC (D) 16 59.4 mm² 9.9 x 6
  • VOUT Resistor Programmable Down to 0.9 V
  • 3.3-V or 5.0-V Input Supply
  • 1% DC Accuracy
  • High Efficiency Synchronous Switching
  • Drives P-Channel (High Side) and N-Channel (Low Side) MOSFETs
  • Lossless Programmable Current Limit
  • Logic Compatible Shutdown
  • APPLICATIONS
    • Local Microprocessor Core Voltage Power Supplies for Desktop and Notebook Computers
    • DSP Core or I/O Powering
    • High-Speed GTL Bus Regulation
  • VOUT Resistor Programmable Down to 0.9 V
  • 3.3-V or 5.0-V Input Supply
  • 1% DC Accuracy
  • High Efficiency Synchronous Switching
  • Drives P-Channel (High Side) and N-Channel (Low Side) MOSFETs
  • Lossless Programmable Current Limit
  • Logic Compatible Shutdown
  • APPLICATIONS
    • Local Microprocessor Core Voltage Power Supplies for Desktop and Notebook Computers
    • DSP Core or I/O Powering
    • High-Speed GTL Bus Regulation

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.
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類型 標題 日期
* Data sheet Low Voltage Synchronous Buck Controller datasheet (Rev. F) 2005年 1月 10日
User guide UCC3585 Low Voltage Synchronous Buck Converter Evaluation Board 2001年 2月 8日
Application note Power Supply Sequencing Solutions for Dual Supply Voltage DSPs (Rev. A) 2000年 7月 5日

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