MAX744A：5V、降压型、电流模式PWM DC-DC转换器
对于新设计推荐使用性能更好的器件：MAX1684/MAX1685
The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators. The MAX738A/MAX744A accept inputs from 6V to 16V and deliver 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply current is 1.7mA and only 6µA in shutdown. Pulse-width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. Fixed-frequency switching allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary. The MAX730A/MAX738A/MAX744A also feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.
关键特性
| MAX730A、MAX738A、MAX744A：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX730A-MAX744A.pdf | Rev 2; 01/1996 |
关键参数
| Part Number | VIN (V) | VIN (V) | VOUT1 (V) | VOUT1 (V) | Preset VOUT (V) | Output Adjust. Method | IOUT1 (A) | Switch Type | DC-DC Outputs | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | max | See Notes | |||||||
| MAX730A | 5.2 | 11 | 5 | 5 | 5 |
| 0.45 | Internal | 1 | 210 |
| $2.26 @1k |
| MAX738A | 6 | 16 | 0.75 | 190 |
| $3.38 @1k | ||||||
| MAX744A | 6 | 16 | 0.75 | 212.5 |
| $3.38 @1k | ||||||
质量和环境数据
相关产品
- MAX1684：低噪声、14V输入、1A、PWM降压型转换器
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX744AC/D | 停止供货 | DICE SALES,；NA引脚；DICE； | 0°C至+70°C | 参考数据资料 | |
| MAX744ACPA | 停止供货 | MAX744ACPA+ | PDIP(N),；8引脚；81.9mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX744ACPA+ | 生产中 | PDIP(N),；8引脚；81.9mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX744ACWE | 停止供货 | MAX744ACWE+ | SOIC(W),；16引脚；111.8mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX744ACWE+ | 生产中 | SOIC(W),；16引脚；111.8mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX744ACWE+T | 生产中 | SOIC(W),；16引脚；111.8mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX744ACWE-T | 停止供货 | MAX744ACWE+T | SOIC(W),；16引脚；111.8mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX744AEPA | 停止供货 | MAX744AEPA+ | PDIP(N),；8引脚；81.9mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX744AEPA+ | 生产中 | PDIP(N),；8引脚；81.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX744AEWE | 停止供货 | MAX744AEWE+ | SOIC(W),；16引脚；111.8mm² | -40°C至+85°C | RoHS/无铅：否 |
| 型号 | 状况 | 推荐替代产品 | 封装：类型 引脚 占位面积封装图 编码/变更 * | 温度 | RoHS/无铅？ |
| MAX744AEWE+ | 生产中 | SOIC(W),；16引脚；111.8mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX744AEWE+T | 生产中 | SOIC(W),；16引脚；111.8mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX744AEWE-T | 停止供货 | MAX744AEWE+T | SOIC(W),；16引脚；111.8mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX744AMJA | 停止供货 | CDIP(N),；8引脚；82.6mm² | -55°C至+125°C | RoHS/无铅：否 |
- MAX730A-MAX744A.pdf MAX744A
- MAX744A.pdf MAX744A
- 典型工作电路 MAX744A
