LT1175 500mA、低压差、微功率负稳压器
LT®1175 是一款微功率、低压差负稳压器。它具有 45μA 静态电流，并在停机模式中减小至 10μA。一种新型基准放大器拓扑结构实现了精准的 DC 特性，并能够利用极宽范围的输出电容值来保持上佳的环路稳定性。凭借一种独特的功率晶体管抗饱和设计，该器件获得了非常低压差电压和高效率。可以提供可调或固定 5V 器件版本。
多项新功能使 LT1175 非常容易使用。SHDN 引脚可直接连接至正或负逻辑电平。用户可以选择 200mA、400mA、600mA 和 800mA的电流限值。可强制输出电压反向，而不会导致器件损坏或发生闭锁。与先前的一些设计不同，这款器件对压差情况下的静态电流增加进行了有效的限制。
LT1175 具有完整的欠压保护以及电流限制、功率限制和热停机功能。对于微功率工作电流条件下的高温运作问题给予了特别的关注，从而可防止输出电压在无负载状况下上升。LT1175 采用 8 引脚 PDIP 和 SO 封装、3 引脚 SOT-223 封装、5 引脚表面贴装型 DD 封装和通孔 TO-220 封装。8 引脚 SO 封装为实现低热阻进行了特别设计。
产品特点 Features
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应用
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LT1175 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) * |
| LT1175CDWF#MILDWF | DD PAK | 5 | |||
| LT1175CN8 | PDIP | 8 | C | $3.10 | $2.50 |
| LT1175CN8#PBF | PDIP | 8 | C | $3.10 | $2.50 |
| LT1175CN8-5 | PDIP | 8 | C | $3.10 | $2.50 |
| LT1175CN8-5#PBF | PDIP | 8 | C | $3.10 | $2.50 |
| LT1175CQ | DD PAK | 5 | C | $3.90 | $3.20 |
| LT1175CQ#PBF | DD PAK | 5 | C | $3.90 | $3.20 |
| LT1175CQ#TR | DD PAK | 5 | C | $3.32 | |
| LT1175CQ#TRPBF | DD PAK | 5 | C | $3.32 | |
| LT1175CQ-5 | DD PAK | 5 | C | $3.90 | $3.20 |
| LT1175CQ-5#PBF | DD PAK | 5 | C | $3.90 | $3.20 |
| LT1175CQ-5#TR | DD PAK | 5 | C | $3.32 | |
| LT1175CQ-5#TRPBF | DD PAK | 5 | C | $3.32 | |
| LT1175CS8 | SO | 8 | C | $3.60 | $2.90 |
| LT1175CS8#PBF | SO | 8 | C | $3.60 | $2.90 |
| LT1175CS8#TR | SO | 8 | C | $2.96 | |
| LT1175CS8#TRPBF | SO | 8 | C | $2.96 | |
| LT1175CS8-5 | SO | 8 | C | $3.60 | $2.90 |
| LT1175CS8-5#PBF | SO | 8 | C | $3.60 | $2.90 |
| LT1175CS8-5#TR | SO | 8 | C | $2.96 | |
| LT1175CS8-5#TRPBF | SO | 8 | C | $2.96 | |
| LT1175CST-5 | SOT | 3 | C | $3.25 | $2.60 |
| LT1175CST-5#PBF | SOT | 3 | C | $3.25 | $2.60 |
| LT1175CST-5#TR | SOT | 3 | C | $2.66 | |
| LT1175CST-5#TRPBF | SOT | 3 | C | $2.66 | |
| LT1175CT | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175CT#06PBF | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175CT#PBF | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175CT-5 | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175CT-5#06PBF | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175CT-5#PBF | TO-220 | 5 | C | $3.75 | $3.05 |
| LT1175IN8 | PDIP | 8 | I | $4.00 | $3.25 |
| LT1175IN8#PBF | PDIP | 8 | I | $4.00 | $3.25 |
| LT1175IN8-5 | PDIP | 8 | I | $4.00 | $3.25 |
| LT1175IN8-5#PBF | PDIP | 8 | I | $4.00 | $3.25 |
| LT1175IQ | DD PAK | 5 | I | $5.00 | $4.10 |
| LT1175IQ#PBF | DD PAK | 5 | I | $5.00 | $4.10 |
| LT1175IQ#TR | DD PAK | 5 | I | $4.22 | |
| LT1175IQ#TRPBF | DD PAK | 5 | I | $4.22 | |
| LT1175IQ-5 | DD PAK | 5 | I | $5.00 | $4.10 |
| LT1175IQ-5#PBF | DD PAK | 5 | I | $5.00 | $4.10 |
| LT1175IQ-5#TR | DD PAK | 5 | I | $4.22 | |
| LT1175IQ-5#TRPBF | DD PAK | 5 | I | $4.22 | |
| LT1175IS8 | SO | 8 | I | $4.65 | $3.80 |
| LT1175IS8#PBF | SO | 8 | I | $4.65 | $3.80 |
| LT1175IS8#TR | SO | 8 | I | $3.86 | |
| LT1175IS8#TRPBF | SO | 8 | I | $3.86 | |
| LT1175IS8-5 | SO | 8 | I | $4.65 | $3.80 |
| LT1175IS8-5#PBF | SO | 8 | I | $4.65 | $3.80 |
| LT1175IS8-5#TR | SO | 8 | I | $3.86 | |
| LT1175IS8-5#TRPBF | SO | 8 | I | $3.86 | |
| LT1175IST-5 | SOT | 3 | I | $3.60 | $2.85 |
| LT1175IST-5#PBF | SOT | 3 | I | $3.60 | $2.85 |
| LT1175IST-5#TR | SOT | 3 | I | $2.91 | |
| LT1175IST-5#TRPBF | SOT | 3 | I | $2.91 | |
| LT1175IT | TO-220 | 5 | I | $4.85 | $3.95 |
| LT1175IT#PBF | TO-220 | 5 | I | $4.85 | $3.95 |
| LT1175IT-5 | TO-220 | 5 | I | $4.80 | $3.95 |
| LT1175IT-5#PBF | TO-220 | 5 | I | $4.80 | $3.95 |
| LT1175MPQ#PBF | DD PAK | 5 | MP | $13.71 | $9.60 |
| LT1175MPQ#TRPBF | DD PAK | 5 | MP | $9.66 | |
| LT1175MPQ-5#PBF | DD PAK | 5 | MP | $13.71 | $9.60 |
| LT1175MPQ-5#TRPBF | DD PAK | 5 | MP | $9.66 | |
| LT1175MPS8#PBF | SO | 8 | MP | $12.43 | $8.70 |
| LT1175MPS8#TRPBF | SO | 8 | MP | $8.76 | |
| LT1175MPS8-5 | SO | 8 | MP | ||
| LT1175MPS8-5#PBF | SO | 8 | MP | $12.43 | $8.70 |
| LT1175MPS8-5#TRPBF | SO | 8 | MP | $8.76 |
演示电路板
| 器件型号 | 描述 |
| DC886A | LT1175EDDB Demo Board |
LT1175 数据手册及相关资料下载
- 数据手册(英文) : LT1175 - 500mA Negative Low Dropout Micropower Regulator.PDF
- 设计要点 (英文) : DN121 - New Micropower, Low Dropout Regulators Ease Battery Supply Designs.PDF
- 可靠性数据 : R308 Reliability Data .PDF
- LT Journal : Dec 2005 Taking Full Advantage of Very Low Dropout linear Regulators.PDF
