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AC/DC 和 DC/DC 转换器（集成 FET）

LM2738

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550kHz/1.6MHz 1.5A 降压 DC-DC 开关稳压器

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LM2738

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数据表 立即订购

产品详情

Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 18 Vout (min) (V) 0.8 Features Enable, Light-load efficiency Control mode current mode Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 1600 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1900 Duty cycle (max) (%) 95 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 18 Vout (min) (V) 0.8 Features Enable, Light-load efficiency Control mode current mode Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 1600 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1900 Duty cycle (max) (%) 95 Type Converter
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 WSON (NGQ) 8 9 mm² 3 x 3
  • Space-Saving WSON and MSOP-PowerPAD Packages
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1.5-A Output Current
  • 550-kHz (LM2738Y) and 1.6-MHz (LM2738X) Switching Frequencies
  • 250-mΩ NMOS Switch
  • 400-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
  • Space-Saving WSON and MSOP-PowerPAD Packages
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1.5-A Output Current
  • 550-kHz (LM2738Y) and 1.6-MHz (LM2738X) Switching Frequencies
  • 250-mΩ NMOS Switch
  • 400-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown

The LM2738 regulator is a monolithic, high-frequency, PWM step-down DC-DC converter in an 8-pin WSON or 8-pin MSOP-PowerPAD package. It provides all the active functions for local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components, the LM2738 is easy to use. The ability to drive 1.5-A loads with an internal 250-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. Switching frequency is internally set to 550 kHz (LM2738Y) or 1.6 MHz (LM2738X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External enable is included, featuring an ultralow standby current of 400 nA. The LM2738 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce in-rush current, cycle-by-cycle current limit, thermal shutdown, and output over-voltage protection.

The LM2738 regulator is a monolithic, high-frequency, PWM step-down DC-DC converter in an 8-pin WSON or 8-pin MSOP-PowerPAD package. It provides all the active functions for local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components, the LM2738 is easy to use. The ability to drive 1.5-A loads with an internal 250-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. Switching frequency is internally set to 550 kHz (LM2738Y) or 1.6 MHz (LM2738X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External enable is included, featuring an ultralow standby current of 400 nA. The LM2738 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce in-rush current, cycle-by-cycle current limit, thermal shutdown, and output over-voltage protection.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM2738 550-kHz/1.6-MHz 1.5-A Step-Down DC-DC Switching Regulator 数据表 (Rev. C) PDF | HTML 2015年 9月 25日
用户指南 LM2738 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 2021年 12月 9日

设计和开发

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评估板

LM2738YSDEVAL — 采用节省空间的 LLP 封装的 LM2738 550kHz 1.5A 降压 DC-DC 开关稳压器 EVM

The LM2738 demo board is configured to convert 12V input to 3.3V output at 1.5A load current using the LM2738X 1.6MHz or the LM2738Y 550kHz step down DC-DC regulator. The tiny low profile eMSOP-8 and LLP-8 packages allows the demo board to be manufactured using just over one square inch of a (...)

用户指南: PDF | HTML
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封装 引脚 CAD 符号、封装和 3D 模型
HVSSOP (DGN) 8 Ultra Librarian
WSON (NGQ) 8 Ultra Librarian
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  • 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
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