TPS563249 是一款采用 SOT-23 封装的简单易用型 3A 同步降压转换器。
该器件经过优化,最大限度地减少了运行所需的外部组件并可实现低待机电流。
此开关稳压器采用 D-CAP3 模式控制,能够提供快速瞬态响应,并且在无需外部补偿组件的情况下支持诸如高分子聚合物等低等效串联电阻 (ESR) 输出电容以及超低 ESR 陶瓷电容器。
TPS563249 采用强制连续导通模式 (FCCM) 运行,在轻载工作期间保持固定的 1.4MHz 开关频率,并可消除系统干扰。TPS563249 采用 6 引脚 1.6mm × 2.9mm SOT (DDC) 封装,额定结温范围为 –40°C 至 125°C。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
TPS563249 | SOT-23-THIN (6) | 1.60mm x 2.90mm |
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日期 | 修订版本 | 说明 |
---|---|---|
2018 年 12 月 | * | 初始发行版。 |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
EN | 5 | I | Enable input control. Active high and must be pulled up to enable the device. |
GND | 1 | — | Ground pin Source terminal of low-side power NFET as well as the ground terminal for controller circuit. Connect sensitive VFB to this GND at a single point. |
SW | 2 | O | Switch node connection between high-side NFET and low-side NFET. |
VBST | 6 | O | Supply input for the high-side NFET gate drive circuit. Connect 0.1 µF capacitor between VBST and SW pins. |
VFB | 4 | I | Converter feedback input. Connect to output voltage with feedback resistor divider. |
VIN | 3 | I | Input voltage supply pin. The drain terminal of high-side power NFET. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Input voltage | VIN | –0.3 | 19 | V |
VBST | –0.3 | 24.5 | V | |
VBST (10 ns transient) | –0.3 | 26.5 | V | |
VBST (vs SW) | –0.3 | 5.5 | V | |
VFB | –0.3 | 5.5 | V | |
SW | –2 | 19 | V | |
SW (10 ns transient) | –3.5 | 21 | V | |
EN | -0.3 | VIN + 0.3 | V | |
Operating junction temperature, TJ | –40 | 150 | °C | |
Storage temperature, Tstg | –55 | 150 | °C |