L4973

批量生产
Design Win

3.5 A开关稳压器

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产品概述

描述

The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed voltages of 3.3V or 5.1V and using a simple external divider output adjustable voltage up to 50V. Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical RDS(on) of 0.15Ω) to obtain very high efficiency and very fast switching times. Switching frequency up to 300KHz are achievable (the maximum power dissipation of the packages must be observed).

A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 40V cover the majority of the today applications. Features of this new generation of DC-DC converter includes pulse by pulse current limit, hiccup mode for output short circuit protection, voltage feed forward regulation, soft start, input/output synchronization, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. Packages available are in plastic dual in line, DIP- 18 (12+3+3) for standard assembly, and SO20 (12+4+4) for SMD assembly.

  • 所有功能

    • Inhibit for zero current consumption (100mA at VCC= 24V)
    • Input/output synchronization function
    • Thermal shutdown
    • Protection against feedback disconnection
    • Soft start function
    • Output over voltage protection
    • Internal current limiting (pulse by pulse and HICCUP mode)
    • Zero load current operation (min 1mA)
    • Up to 3.5A step down converter
    • 3.3V and 5.1V (±1%) fixed output, and adjustable outputs from: 0.5V to 50V (3.3 type)5.1V to 50V (5.1 type)
    • Operating input voltage from 8V to 55V
    • Voltage feed forward
    • Precise 5.1V (1.5%) reference voltage externally available
    • Frequency adjustable up to 300kHz

电路原理图

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EDA符号、封装和3D模型

STMicroelectronics - L4973

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3D模型

质量与可靠性

产品型号 Marketing Status 等级规格 符合RoHS级别 材料声明**
L4973D3.3
NRND
SO-20 工业 Ecopack2
L4973D3.3-013TR
批量生产
SO-20 工业 Ecopack2
L4973D5.1-013TR
批量生产
SO-20 工业 Ecopack2

L4973D3.3

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4973D3.3-013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4973D5.1-013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

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包装类型
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ECCN (EU)
L4973D3.3
Available at distributors

经销商的可用性 L4973D3.3

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L4973D5.1-013TR
Available at distributors

经销商的可用性 L4973D5.1-013TR

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处
L4973D3.3-013TR
Available at distributors

经销商的可用性 L4973D3.3-013TR

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处

L4973D3.3 NRND

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L4973D3.3

代理商名称

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L4973D5.1-013TR 批量生产

Budgetary Price (US$)*/Qty:
-
包:
包装类型:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

产品型号:

L4973D5.1-013TR

代理商名称

代理商库存报告日期:

L4973D3.3-013TR 批量生产

Budgetary Price (US$)*/Qty:
-
包:
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RoHS:
Country of Origin:
ECCN (US):
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产品型号:

L4973D3.3-013TR

代理商名称

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(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商