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

LM20323

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4.5-36V 3A 电流模式同步降压稳压器

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TLVM13630 正在供货 高密度 3V 至 36V 输入、1V 至 6V 输出、3A 降压电源模块 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM20323

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产品详情

Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500
Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Type Converter Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 4.5V to 36V Input Voltage Range
  • 3A Output Current, 5.2A Peak Current
  • 130 mΩ/110 mΩ Integrated Power MOSFETs
  • 93% Peak Efficiency with Synchronous Rectification
  • 1.5% Feedback Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Fixed 500 kHz Switching Frequency
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-biased Loads
  • Programmable Soft-start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, PGOOD
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit Minimizes Inductor Size
  • Non-linear Current Mode Slope Compensation
  • 20-Pin HTSSOP Exposed Pad Package

All trademarks are the property of their respective owners.

  • 4.5V to 36V Input Voltage Range
  • 3A Output Current, 5.2A Peak Current
  • 130 mΩ/110 mΩ Integrated Power MOSFETs
  • 93% Peak Efficiency with Synchronous Rectification
  • 1.5% Feedback Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Fixed 500 kHz Switching Frequency
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-biased Loads
  • Programmable Soft-start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, PGOOD
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit Minimizes Inductor Size
  • Non-linear Current Mode Slope Compensation
  • 20-Pin HTSSOP Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20323 is a full featured 500kHz synchronous buck regulator capable of delivering up to 3A of load current. The current mode control loop is externally compensated with only two components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.

The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit.

The LM20323 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20323 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20323 is offered in an exposed pad 20-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20323 is a full featured 500kHz synchronous buck regulator capable of delivering up to 3A of load current. The current mode control loop is externally compensated with only two components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.

The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit.

The LM20323 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20323 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20323 is offered in an exposed pad 20-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM20323 36V, 3A 500 kHz Synchronous Buck Regulator 数据表 (Rev. C) 2013年 4月 3日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1790 LM20323 Evaluation Board (Rev. B) 2013年 5月 5日
EVM 用户指南 AN-1792 LM20343 Evaluation Board (Rev. B) 2013年 5月 5日
应用手册 AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日

设计和开发

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计算工具

LM20323DESIGN-CALC — LM20323 计算器电子表格

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参考设计

PMP10487 — 2.9-5.5VDC 输入同步降压 1A LED 驱动器参考设计

此参考设计可在 2.9VDC 至 5.5VDC 的稳定状态输入电压范围内以 1.067A 的最大电流驱动单个 LED。可通过外部控制电压将 LED 中的电流调节至最低 0A。此电路使用 INA193 电流传感放大器降低传感电阻器损耗并实现最高 93% 的效率。此电路在不到 150uS 内调节输出电流，实现宽占空比 PWM 调光。
测试报告: PDF
原理图: PDF
封装 引脚 下载
HTSSOP (PWP) 20 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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