Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
RICHTEK RT9742AGJ5F
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RICHTEK RT9742AGJ5F
- Type
- RICHTEK
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- RICHTEK
- Electronic Component
- RT9742AGJ5F
- Electronic Component
- 1
- Package
- TSOT-23-5
- Type
- Switch
- Electronic Component
- Power Electronic Switch
- Electronic Component
- 0.056g
- Electronic Component
- 1
- Channel Count
- 1
- Features
- Voltage; Current
- Electronic Component
- BM0230063628
- Resistor
- 55mΩ
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.7V~6V
- Current
- 3A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
RT9742AGJ5F — 高侧电源开关概述（RICHTEK）
一 概述
RT9742AGJ5F 是台湾立锜（RICHTEK）推出的一款单通道高侧电源开关驱动器，封装为 TSOT-23-5。器件集成了 N 型功率开关与驱动电路，输入控制为高电平有效，可在 2.7V 至 6V 的工作电压范围内可靠工作，适合便携与工业类电源管理场景，最高连续负载电流可达 3A。
二 主要参数一览
- 类型：高侧开关（1 通道，N 型）
- 控制逻辑：高电平有效（EN/CTRL）
- 最大连续电流：3A
- 工作电压：2.7V ~ 6V
- 导通电阻（RDS(on)）：典型 55 mΩ
- 工作温度范围：-40°C ~ +85°C
- 封装：TSOT-23-5
- 型号：RT9742AGJ5F（品牌：RICHTEK）
三 保护特性与可靠性
RT9742AGJ5F 内建多重保护机制，提升系统安全与可靠性：
- 过热保护（OTP）：在器件温度异常升高时自动关断，防止热失控。
- 短路/瞬态保护（SCP）：快速检测并抑制短路事件，限制峰值电流。
- 过流保护（OCP）：恒流或限流机制在过载时保护开关与负载。
- 欠压保护（UVP）：输入或驱动电压低于安全门槛时禁止导通，避免异常工作。
这些保护通常配合自动恢复或锁定机制，具体行为请参照器件规格书以便根据系统需求选择合适的保护策略。
四 典型应用
- 电池供电设备的电源分配与负载开关（手机外设、平板、可穿戴等）
- 电源上电排序与模块使能（Wi‑Fi、射频模块、传感器群）
- 外围负载保护（马达驱动前级、指示灯、继电器驱动）
- 热插拔或热备份系统的高侧开关控制
五 设计与布局建议
- 封装体积小（TSOT-23-5），但功率密度较高，布板时建议为 VIN/VOUT 走宽铜箔，并尽量缩短电源回路长度以降低寄生电阻与电感。
- 在输入端和输出端分别并联适当的去耦电容，抑制瞬态电流与稳定开关瞬态行为；在靠近器件引脚处放置低 ESR 电容。
- 注意散热：在 PCB 下方或周围增加铜面积以提升散热能力，必要时配合过孔散热。
- 控制端（EN/CTRL）应保证明确的高电平/低电平驱动源，避免悬空导致误动作；外加上拉/下拉电阻可提高鲁棒性。
- 若系统对浪涌或反向电流敏感，考虑添加缓冲/保护元件（TVS、电感等）。
六 封装与选型提示
TSOT-23-5 小型封装利于空间受限应用，但在高电流、长时间工作场景需特别注意热设计。选择 RT9742AGJ5F 时，应根据系统最大负载电流、工作环境温度以及保护策略来评估裕量，必要时选用并行或更大封装的器件以降低热应力。
如需进一步的电气特性、典型波形或参考电路图，请参阅 RICHTEK 官方规格书和应用说明，以确保在目标应用中获得最佳性能与可靠性。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
