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

LM2650

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同步降压直流/直流转换器

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LM2650

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产品详情

Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 18 Topology Buck Type Converter Switching frequency (min) (kHz) 75 Switching frequency (max) (kHz) 105 Features Frequency synchronization Control mode Voltage mode Vout (min) (V) 1.5 Vout (max) (V) 16 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.004
Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 18 Topology Buck Type Converter Switching frequency (min) (kHz) 75 Switching frequency (max) (kHz) 105 Features Frequency synchronization Control mode Voltage mode Vout (min) (V) 1.5 Vout (max) (V) 16 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.004
SOIC (DW) 24 159.65 mm² 15.5 x 10.3
  • Ultra High Efficiencies (95% possible)
  • High Efficiency Over a 3A to Milliamperes Load Range
  • Synchronous Switching of Internal NMOS Power FETs
  • Wide Input Voltage Range (4.5V to 18V)
  • Output Voltage Adjustable from 1.5V to 16V
  • Automatic Low-Power Sleep Mode
  • Logic-Controlled Micropower Shutdown (IQSD ≤ 25 µA)
  • Frequency Adjustable up to 300 kHz
  • Frequency Synchronization with External Signal
  • Programmable Soft-Start
  • Short-Circuit Current Limiting
  • Thermal Shutdown
  • Available in 24-lead Small-Outline Package
  • Ultra High Efficiencies (95% possible)
  • High Efficiency Over a 3A to Milliamperes Load Range
  • Synchronous Switching of Internal NMOS Power FETs
  • Wide Input Voltage Range (4.5V to 18V)
  • Output Voltage Adjustable from 1.5V to 16V
  • Automatic Low-Power Sleep Mode
  • Logic-Controlled Micropower Shutdown (IQSD ≤ 25 µA)
  • Frequency Adjustable up to 300 kHz
  • Frequency Synchronization with External Signal
  • Programmable Soft-Start
  • Short-Circuit Current Limiting
  • Thermal Shutdown
  • Available in 24-lead Small-Outline Package

The LM2650 is a step-down DC/DC converter featuring high efficiency over a 3A to milliamperes load range. This feature makes the LM2650 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

The LM2650 also features a logic-controlled shutdown mode in which it draws at most 25μA from the input power supply.

The LM2650 employs a fixed-frequency pulse-width modulation (PWM) and synchronous rectification to achieve very high efficiencies. In many applications, efficiencies reach 95%+ for loads around 1A and exceed 90% for moderate to heavy loads from 0.2A to 2A.

A low-power hysteretic or "sleep" mode keeps efficiencies high at light loads. The LM2650 enters and exits sleep mode automatically as the load crosses "sleep in" and "sleep out" thresholds. The LM2650 provides nodes for programming both thresholds via external resistors. A logic input allows the user to override the automatic sleep feature and keep the LM2650 in PWM mode regardless of the load level.

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

The LM2650 is a step-down DC/DC converter featuring high efficiency over a 3A to milliamperes load range. This feature makes the LM2650 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.

The LM2650 also features a logic-controlled shutdown mode in which it draws at most 25μA from the input power supply.

The LM2650 employs a fixed-frequency pulse-width modulation (PWM) and synchronous rectification to achieve very high efficiencies. In many applications, efficiencies reach 95%+ for loads around 1A and exceed 90% for moderate to heavy loads from 0.2A to 2A.

A low-power hysteretic or "sleep" mode keeps efficiencies high at light loads. The LM2650 enters and exits sleep mode automatically as the load crosses "sleep in" and "sleep out" thresholds. The LM2650 provides nodes for programming both thresholds via external resistors. A logic input allows the user to override the automatic sleep feature and keep the LM2650 in PWM mode regardless of the load level.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of sequencing multiple power supplies.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM2650 Synchronous Step-Down DC/DC Converter 数据表 (Rev. C) 2013年 4月 3日
应用手册 AN-1071 Information About the LM2650 Evaluation Board Rev. 1 (Rev. D) 2013年 4月 29日

设计和开发

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SOIC (DW) 24 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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