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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM2651

現行

1.5A 高效率切換穩壓器

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LM2651

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 4 Vin (max) (V) 14 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 Iq (typ) (µA) 1600 Duty cycle (max) (%) 95
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1.5 Vin (min) (V) 4 Vin (max) (V) 14 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 Iq (typ) (µA) 1600 Duty cycle (max) (%) 95
TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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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類型 標題 日期
* Data sheet LM2651 1.5 A High-Efficiency Synchronous Switching Regulator datasheet (Rev. E) PDF | HTML 2015年 11月 3日
User guide LM2651 Step-Down Converter Evaluation Module User's Guide (Rev. D) PDF | HTML 2022年 1月 11日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
User guide LM2651 EVAL 1.5A High Efficiency Synch Switching Reg Eval Board (Rev. A) 2013年 4月 24日

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開發板

LM2651-3.3EVAL — 1.5A 高效率切換穩壓器

1.5A High Efficiency Switching Regulator

使用指南: PDF | HTML
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 16 Ultra Librarian
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