LTC3851A-1 同步降压型开关稳压控制器
LTC®3851A-1 是一款高性能同步降压型开关稳压控制器，用于驱动一个全 N 沟道同步功率 MOSFET 级。一种恒定频率电流模式架构提供了一个高达 750kHz 的可锁相频率。
OPTI-LOOP 补偿的运用能够在一个很宽的输出电容和 ESR 数值范围内优化瞬态响应。LTC3851A-1 具有一个精准的 0.8V 基准和一个电源良好指示器。一个 4V 至 38V (绝对最大值为 40V) 的宽输入电源范围可适应大多数电池构造和中间总线电压。
在启动操作和停机期间，TK/SS 引脚运用重合或比例式跟踪的方式来使输出电压斜坡上升。在短路条件下，电流折返功能将限制 MOSFET 的热耗散。在轻负载条件下，MODE / PLLIN 引脚负责在突发模式操作、脉冲跳跃模式或连续电感器电流模式之间进行选择，并允许将 IC 同步至一个外部时钟。与 LTC3851-1 相比，LTC3851A-1 包含一个改进型 PLL。
LTC3851A-1 和 LTC3851A 几乎完全相同，只是用 PGOOD 引脚替代了后者的 ILIM 引脚。
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LTC3851A-1 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LTC3851AEGN#PBF | SSOP | 16 | E | $2.44 | $1.71 |
| LTC3851AEGN#TRPBF | SSOP | 16 | E | $1.77 | |
| LTC3851AEMSE#PBF | MSOP | 16 | E | $2.44 | $1.71 |
| LTC3851AEMSE#TRPBF | MSOP | 16 | E | $1.77 | |
| LTC3851AEMSE-1#PBF | MSOP | 16 | E | $2.44 | $1.71 |
| LTC3851AEMSE-1#TRPBF | MSOP | 16 | E | $1.77 | |
| LTC3851AEUD#PBF | QFN | 16 | E | $2.44 | $1.71 |
| LTC3851AEUD#TRPBF | QFN | 16 | E | $1.71 | |
| LTC3851AEUD-1#PBF | QFN | 16 | E | $2.44 | $1.71 |
| LTC3851AEUD-1#TRPBF | QFN | 16 | E | $1.71 | |
| LTC3851AHMSE#PBF | MSOP | 16 | H | $3.20 | $2.24 |
| LTC3851AHMSE#TRPBF | MSOP | 16 | H | $2.30 | |
| LTC3851AHMSE-1#PBF | MSOP | 16 | H | $3.20 | $2.24 |
| LTC3851AHMSE-1#TRPBF | MSOP | 16 | H | $2.30 | |
| LTC3851AIGN#PBF | SSOP | 16 | I | $2.77 | $1.94 |
| LTC3851AIGN#TRPBF | SSOP | 16 | I | $2.00 | |
| LTC3851AIMSE#PBF | MSOP | 16 | I | $2.77 | $1.94 |
| LTC3851AIMSE#TRPBF | MSOP | 16 | I | $2.00 | |
| LTC3851AIMSE-1#PBF | MSOP | 16 | I | $2.77 | $1.94 |
| LTC3851AIMSE-1#TRPBF | MSOP | 16 | I | $2.00 | |
| LTC3851AIUD#PBF | QFN | 16 | I | $2.77 | $1.94 |
| LTC3851AIUD#TRPBF | QFN | 16 | I | $2.00 | |
| LTC3851AIUD-1#PBF | QFN | 16 | I | $2.77 | $1.94 |
| LTC3851AIUD-1#TRPBF | QFN | 16 | I | $2.00 | |
| LTC3851AMPMSE#PBF | MSOP | 16 | MP | $7.56 | $5.29 |
| LTC3851AMPMSE#TRPBF | MSOP | 16 | MP | $5.35 | |
| LTC3851AMPMSE-1#PBF | MSOP | 16 | MP | $7.56 | $5.29 |
| LTC3851AMPMSE-1#TRPBF | MSOP | 16 | MP | $5.35 | |
| LTC3851EGN#PBF | SSOP | 16 | E | $2.44 | $1.71 |
| LTC3851EGN#TRPBF | SSOP | 16 | E | $1.77 | |
| LTC3851EMSE#PBF | MSOP | 16 | E | $2.44 | $1.71 |
| LTC3851EMSE#TRPBF | MSOP | 16 | E | $1.77 | |
| LTC3851EMSE-1#PBF | MSOP | 16 | E | $2.44 | $1.71 |
| LTC3851EMSE-1#TRPBF | MSOP | 16 | E | $1.77 | |
| LTC3851EUD#PBF | QFN | 16 | E | $2.44 | $1.71 |
| LTC3851EUD#TRPBF | QFN | 16 | E | $1.77 | |
| LTC3851EUD-1#PBF | QFN | 16 | E | $2.44 | $1.71 |
| LTC3851EUD-1#TRPBF | QFN | 16 | E | $1.77 | |
| LTC3851IGN#PBF | SSOP | 16 | I | $2.77 | $1.94 |
| LTC3851IGN#TRPBF | SSOP | 16 | I | $2.00 | |
| LTC3851IMSE#PBF | MSOP | 16 | I | $2.77 | $1.94 |
| LTC3851IMSE#TRPBF | MSOP | 16 | I | $2.00 | |
| LTC3851IMSE-1#PBF | MSOP | 16 | I | $2.77 | $1.94 |
| LTC3851IMSE-1#TRPBF | MSOP | 16 | I | $2.00 | |
| LTC3851IUD#PBF | QFN | 16 | I | $2.77 | $1.94 |
| LTC3851IUD#TRPBF | QFN | 16 | I | $2.00 |
LTC3851A-1 数据手册及相关资料下载
- 数据手册(英文) : LTC3851A-1 - Synchronous Step-Down Switching Regulator Controller.PDF
- 可靠性数据 : R526 Reliability Data .PDF
