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AC/DC & DC/DC converters (integrated FET)

LM2655

現行

2.5A 高效同步切換穩壓器

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LM2655

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 2.5 Vin (min) (V) 4 Vin (max) (V) 14 Topology Buck Type Converter Switching frequency (min) (kHz) 255 Switching frequency (max) (kHz) 345 Features UVLO adjustable Control mode Voltage mode Vout (min) (V) 3.3 Vout (max) (V) 13 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0017
Iout (max) (A) 2.5 Vin (min) (V) 4 Vin (max) (V) 14 Topology Buck Type Converter Switching frequency (min) (kHz) 255 Switching frequency (max) (kHz) 345 Features UVLO adjustable Control mode Voltage mode Vout (min) (V) 3.3 Vout (max) (V) 13 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0017
TSSOP (PW) 16 32 mm² 5 x 6.4
  • Ultra-high efficiency up to 96%
  • 4V to 14V input voltage range
  • Internal high-side MOSFET with low RDS(ON) = 0.033
  • 300 kHz fixed frequency internal oscillator
  • Low-side drive for synchronous operation
  • Guaranteed less than 12 µA shutdown current
  • Patented current sensing for current mode control
  • Programmable soft-start
  • Input undervoltage lockout
  • Output overvoltage shutdown protection
  • Output undervoltage shutdown protection
  • Thermal Shutdown
  • 16-pin TSSOP package
  • Ultra-high efficiency up to 96%
  • 4V to 14V input voltage range
  • Internal high-side MOSFET with low RDS(ON) = 0.033
  • 300 kHz fixed frequency internal oscillator
  • Low-side drive for synchronous operation
  • Guaranteed less than 12 µA shutdown current
  • Patented current sensing for current mode control
  • Programmable soft-start
  • Input undervoltage lockout
  • Output overvoltage shutdown protection
  • Output undervoltage shutdown protection
  • Thermal Shutdown
  • 16-pin TSSOP package

The LM2655 is a current-mode controlled PWM step-down switching regulator. It has the unique ability to operate in synchronous or asynchronous mode. This gives the designer flexibility to choose between the high efficiency of synchronous operation, or the low solution cost of asynchronous operation. Along with flexibility, the LM2655 offers high power density with the small footprint of a TSSOP-16 package.

High efficiency (>90%) is obtained through the use of an internal low ON-resistance (33m) MOSFET, and an external N-Channel MOSFET. This feature, together with its low quiescent current, makes the LM2655 an ideal fit in portable applications.

Integrated in the LM2655 are all the power, control, and drive functions for asynchronous operation. In addition, a low-side driver output allows easy synchronous operation. The IC uses patented current sensing circuitry that eliminates the external current sensing resistor required by other current-mode DC-DC converters. A programmable soft-start feature limits start up current surges and provides a means of sequencing multiple power supplies.

The LM2655 is a current-mode controlled PWM step-down switching regulator. It has the unique ability to operate in synchronous or asynchronous mode. This gives the designer flexibility to choose between the high efficiency of synchronous operation, or the low solution cost of asynchronous operation. Along with flexibility, the LM2655 offers high power density with the small footprint of a TSSOP-16 package.

High efficiency (>90%) is obtained through the use of an internal low ON-resistance (33m) MOSFET, and an external N-Channel MOSFET. This feature, together with its low quiescent current, makes the LM2655 an ideal fit in portable applications.

Integrated in the LM2655 are all the power, control, and drive functions for asynchronous operation. In addition, a low-side driver output allows easy synchronous operation. The IC uses patented current sensing circuitry that eliminates the external current sensing resistor required by other current-mode DC-DC converters. A programmable soft-start feature limits start up current surges and provides a means of sequencing multiple power supplies.
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類型 標題 日期
* Data sheet LM2655 2.5A High Efficiency Synchronous Switching Regulator datasheet (Rev. C) 2005年 4月 14日
User guide LM2655 Step-Down Converter Evaluation Module User's Guide (Rev. E) PDF | HTML 2021年 12月 20日
EVM User's guide LM2655 2.5A Synch Switch Reg Eval Brd (Rev. D) 2013年 4月 24日

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