产品概述
描述
The A7987 is a step-down monolithic switching regulator that can deliver up to 3 A DC. The adjustable output voltage ranges from 0.8 V to VIN. The wide input voltage range and the almost 100% duty cycle capability meet the fail-safe specifications for automotive systems. The embedded switch-over feature on the VBIAS pin maximizes efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current in accordance with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency fold-back implements an effective constant current protection over the different application conditions. The peak current fold-back decreases the stress of the power components in heavy short-circuit conditions. The PGOOD open collector output can also implement the output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise for low noise requirements such as in infotainment applications.
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所有功能
- 3 A DC output current
- 4.5 V to 61 V operating input voltage
- Adjustable fsw (250 kHz to 1.5 MHz)
- Output voltage adjustable from 0.8 V to VIN
- Synchronization
- Adjustable soft-start time
- Adjustable current limitation
- VBIAS improves efficiency at light load
- PGOOD open collector output
- Digital frequency fold-back in short-circuit
- Auto-recovery thermal shutdown
- Qualified following AEC-Q100 requirements
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 Management Design Center
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
Power Supply Design Tool
SMPS design, by topology, by type and by product PFC design with analog and digitial control Supports various PCB configurations 
LED Lighting Design Tool
Handles AC-DC and DC-DC design in common topologies Displays interactive and annotated schematic Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data 
Digital Power Workbench
Provides a step-by-step optimized design of power section and control loop Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs 
Power Tree Designer
Specify input/output power for each node in the tree Check for consistency Design each individual node 
AC Switches Simulator
Select ratings and application waveforms Get junction temperature and blocking voltage graphs Search and sort suitable devices 
Rectifier Diodes Simulator
Select ratings and application waveforms Estimate power losses Search and sort suitable devices 
STPOWER Studio
Supports long mission profiles Provides power loss and temperature graphs Helps define heatsink thermal properties 
Twister Sim
Help select the right ViPOWER Automotive power device Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis Supports various PCB configurations 
TVS Simulator
Specify system ratings and surge waveform Search and sort suitable devices 
Estimate
Build simple schematics and firmware inputs in minutes Quickly generate reliable estimates of: Battery life System power consumption Bill of materials costs 
Active Filters
Handles multi-stage-designs and common topologies Returns circuit component values Provides gain, phase and group delay graphs Low Pass, High Pass and Band Pass 
Comparators
Handles most common configurations Returns circuit components values Provides I/O signal waveforms Inverting, Non Inverting, Window 
Low side Current Sensing
Returns circuit component values Provides current error graphs 
High side Current Sensing
Provides current error graphs. Help to select the right High side current sensing and shunt devices. 
NFC Inductance
Input geometry and substrate properties Get antenna impedance 
UHF Link Budget
Enter forward and reverse link characteristics The tool returns link budget estimate 
NFC Tuning Circuit
Enter antenna parameter and matching target Select the topology of the matching network The tool returns component values for the desired design targets 您可能还会喜欢...
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全部资源
| 资源标题 | 版本 | 更新时间 |
|---|
产品规格 (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 3.0 | 12 Oct 2020 | 12 Oct 2020 |
技术文档 (2)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 2.4 | 11 Jul 2023 | 11 Jul 2023 | ||
| 1.0 | 02 May 2023 | 02 May 2023 |
简报 (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 2.2 | 02 Aug 2023 | 02 Aug 2023 |
手册 (3)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 3.0 | 27 Jul 2022 | 27 Jul 2022 | ||
| 4.0 | 26 Sep 2022 | 26 Sep 2022 | ||
| 1.1 | 02 Nov 2022 | 02 Nov 2022 |
EDA符号、封装和3D模型
STMicroelectronics - A7987
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
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符号
封装
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** |
|---|---|---|---|---|---|
| A7987TR | 批量生产 | HTSSOP16 | 汽车应用 | Ecopack2 | |
A7987TR
Package:
HTSSOP16Material Declaration**:
(**) 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
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 封装 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 温度（ºC） | Operating Temperature (°C) (min) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| A7987TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | HTSSOP16 | Tape and Reel | PHILIPPINES | EAR99 | NEC | - | - | - | |||
A7987TR 批量生产