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LM2651

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1.5A 高效开关稳压器

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LM2651

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产品详情

Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 14 Vin (min) (V) 4 Vout (max) (V) 13 Vout (min) (V) 3.3 Features UVLO adjustable Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0016 Duty cycle (max) (%) 95
Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 14 Vin (min) (V) 4 Vout (max) (V) 13 Vout (min) (V) 3.3 Features UVLO adjustable Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0016 Duty cycle (max) (%) 95
TSSOP (PW) 16 32 mm² (5 mm × 6.4 mm)
  • Ultrahigh Efficiency up to 97%
  • High-Efficiency Over a 1.5-A to 1.5-mA Load
    Range
  • 4-V to 14-V Input Voltage Range
  • 1.8-V, 2.5-V, 3.3-V, or ADJ Output Voltage
  • Internal MOSFET Switch With Low RDS(on) of
    75 mΩ
  • 300-kHz Fixed Frequency Internal Oscillator
  • 7-µA Shutdown Current
  • Patented Current Sensing for Current Mode
    Control
  • Input Undervoltage Lockout
  • Adjustable Soft-Start
  • Current Limit and Thermal Shutdown
  • 16-Pin TSSOP Package

All trademarks are the property of their respective owners.
  • Ultrahigh Efficiency up to 97%
  • High-Efficiency Over a 1.5-A to 1.5-mA Load
    Range
  • 4-V to 14-V Input Voltage Range
  • 1.8-V, 2.5-V, 3.3-V, or ADJ Output Voltage
  • Internal MOSFET Switch With Low RDS(on) of
    75 mΩ
  • 300-kHz Fixed Frequency Internal Oscillator
  • 7-µA Shutdown Current
  • Patented Current Sensing for Current Mode
    Control
  • Input Undervoltage Lockout
  • Adjustable Soft-Start
  • Current Limit and Thermal Shutdown
  • 16-Pin TSSOP Package

All trademarks are the property of their respective owners.

The LM2651 switching regulator provides high-efficiency power conversion over a 100:1 load range (1.5 A to 15 mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to maintain high efficiency. In many applications, the efficiency still exceeds 80% at 15-mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10 µA.

The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.

The LM2651 has a 300-kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low-profile components.

A programmable soft-start feature limits current surges from the input power supply at start-up and provides a simple means of sequencing multiple power supplies.

Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.

The LM2651 switching regulator provides high-efficiency power conversion over a 100:1 load range (1.5 A to 15 mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to maintain high efficiency. In many applications, the efficiency still exceeds 80% at 15-mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10 µA.

The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.

The LM2651 has a 300-kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low-profile components.

A programmable soft-start feature limits current surges from the input power supply at start-up and provides a simple means of sequencing multiple power supplies.

Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM2651 1.5 A High-Efficiency Synchronous Switching Regulator 数据表 (Rev. E) PDF | HTML 2015-11-3
选择指南 Buck Converter Quick Reference Guide (Rev. B) 2021-4-8
用户指南 LM2651 EVAL 1.5A High Efficiency Synch Switching Reg Eval Board (Rev. A) 2013-4-24

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LM2651-3.3EVAL — 1.5A 高效开关稳压器

1.5A High Efficiency Switching Regulator

用户指南: PDF | HTML
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