L7981

批量生产
Design Win

3 A步降开关稳压器

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概述
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样片和购买
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质量与可靠性
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Sales Briefcase

产品概述

描述

The L7981 device is a step-down switching regulator with a 3.7 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 3 A current to the load depending on the application conditions. The input voltage can range from 4.5 V to 28 V, while the output voltage can be set starting from 0.6 V to VIN.
Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.
The QFN and the HSOP packages with exposed pad allow reducing the RthJAdown to 60°C/W and 40°C/W respectively.
  • 所有功能

    • 3 A DC output current
    • 4.5 V to 28 V input voltage
    • Output voltage adjustable from 0.6 V
    • 250 kHz switching frequency, programmable up to 1 MHz
    • Internal soft-start and enable
    • Low dropout operation: 100% duty cycle
    • Voltage feed-forward
    • Zero load current operation
    • Overcurrent and thermal protection
    • VFQFPN 3 x 3 - 8L and HSOP8 package

电路原理图

EDA符号、封装和3D模型

STMicroelectronics - L7981

为您的应用下载所有EDA符号、封装和3D模型,加快您的设计速度。您可以从大量CAD格式中进行选择,以匹配您的设计工具链。

Symbols

符号

Footprints

封装

3D model

3D模型

质量与可靠性

产品型号 Marketing Status 封装 等级规格 符合RoHS级别 材料声明**
L7981A
批量生产
PowerSO-8 工业 Ecopack2
L7981ATR
批量生产
PowerSO-8 工业 Ecopack2
L7981TR
批量生产
QFN-8L P 0.5 mm 工业 Ecopack2

L7981A

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7981ATR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7981TR

Package:

QFN-8L P 0.5 mm

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

QFN-8L P 0.5 mm

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

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Power Supply
Choose type:
Input Specification
Input Specification
V
This option is required. And must be less than or equal to Volt. Max [V]
V
This option is required. And must be greater than or equal to Volt. Min [V]
Output
V
this option is required
A
this option is required
Output Power: 0

样片和购买

产品型号
从分销商订购
从ST订购
供货状态
ECCN (US)
ECCN (EU)
包装类型
封装
温度(ºC) Country of Origin
Budgetary Price (US$)*/Qty
最小值
最大值
L7981A 无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tube PowerSO-8 -40 150 PHILIPPINES
L7981TR 无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tape And Reel QFN-8L P 0.5 mm -40 150 PHILIPPINES
L7981ATR 无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tape And Reel PowerSO-8 -40 150 PHILIPPINES

L7981A

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

包装类型

Tube

封装

PowerSO-8

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

Country of Origin

PHILIPPINES

L7981TR

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

包装类型

Tape And Reel

封装

QFN-8L P 0.5 mm

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

Country of Origin

PHILIPPINES

L7981ATR

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

包装类型

Tape And Reel

封装

PowerSO-8

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

Country of Origin

PHILIPPINES

(*) 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