LT1076HV Step-Down Switching Regulator
The LT®1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A.
The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.
On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.
The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details
A fixed 5V output, 2A version is also available. See LT1076-5.
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LT1076HV 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) * |
| LT1076CQ | DD PAK | 5 | C | $5.00 | $3.95 |
| LT1076CQ#PBF | DD PAK | 5 | C | $5.00 | $3.95 |
| LT1076CQ#TR | DD PAK | 5 | C | $4.07 | |
| LT1076CQ#TRPBF | DD PAK | 5 | C | $4.07 | |
| LT1076CQ-5 | DD PAK | 5 | C | $5.00 | $3.95 |
| LT1076CQ-5#PBF | DD PAK | 5 | C | $5.00 | $3.95 |
| LT1076CQ-5#TR | DD PAK | 5 | C | $4.07 | |
| LT1076CQ-5#TRPBF | DD PAK | 5 | C | $4.07 | |
| LT1076CR | DD PAK | 7 | C | $5.42 | $4.30 |
| LT1076CR#PBF | DD PAK | 7 | C | $5.42 | $4.30 |
| LT1076CR#TR | DD PAK | 7 | C | $4.42 | |
| LT1076CR#TRPBF | DD PAK | 7 | C | $4.42 | |
| LT1076CR-5 | DD PAK | 7 | C | $5.42 | $4.30 |
| LT1076CR-5#PBF | DD PAK | 7 | C | $5.42 | $4.30 |
| LT1076CR-5#TR | DD PAK | 7 | C | $4.42 | |
| LT1076CR-5#TRPBF | DD PAK | 7 | C | $4.42 | |
| LT1076CT | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT#06PBF | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT#30PBF | TO-220 | 5 | C | $4.78 | $3.85 |
| LT1076CT#PBF | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT-5 | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT-5#06PBF | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT-5#PBF | TO-220 | 5 | C | $4.33 | $3.40 |
| LT1076CT7 | TO-220 | 7 | C | $5.00 | $3.95 |
| LT1076CT7#PBF | TO-220 | 7 | C | $5.00 | $3.95 |
| LT1076CT7-5 | TO-220 | 7 | C | $5.00 | $3.95 |
| LT1076CT7-5#PBF | TO-220 | 7 | C | $5.00 | $3.95 |
| LT1076HVCR#PBF | DD PAK | 7 | C | $9.42 | $7.45 |
| LT1076HVCR#TR | DD PAK | 7 | C | $7.57 | |
| LT1076HVCR#TRPBF | DD PAK | 7 | C | $7.57 | |
| LT1076HVCT | TO-220 | 5 | C | $7.58 | $6.00 |
| LT1076HVCT#06PBF | TO-220 | 5 | C | $7.58 | $6.00 |
| LT1076HVCT#PBF | TO-220 | 5 | C | $7.58 | $6.00 |
| LT1076HVCT-5 | TO-220 | 5 | C | $7.58 | $6.00 |
| LT1076HVCT-5#PBF | TO-220 | 5 | C | $7.58 | $6.00 |
| LT1076HVCT7 | TO-220 | 7 | C | $8.75 | $6.90 |
| LT1076HVCT7#PBF | TO-220 | 7 | C | $8.75 | $6.90 |
| LT1076HVCT7-5 | TO-220 | 7 | C | $8.75 | $6.90 |
| LT1076HVCT7-5#PBF | TO-220 | 7 | C | $8.75 | $6.90 |
| LT1076HVIR | DD PAK | 5 | I | $10.95 | $9.05 |
| LT1076HVIR#PBF | DD PAK | 5 | I | $10.95 | $9.05 |
| LT1076HVIR#TR | DD PAK | 5 | I | $9.17 | |
| LT1076HVIR#TRPBF | DD PAK | 5 | I | $9.17 | |
| LT1076HVIT | TO-220 | 5 | I | $8.92 | $7.35 |
| LT1076HVIT#06PBF | TO-220 | 5 | I | $8.92 | $7.35 |
| LT1076HVIT#PBF | TO-220 | 5 | I | $8.92 | $7.35 |
| LT1076HVIT-5 | TO-220 | 5 | I | $9.55 | $7.35 |
| LT1076HVIT-5#PBF | TO-220 | 5 | I | $9.55 | $7.35 |
| LT1076IQ | DD PAK | 5 | I | $5.80 | $4.75 |
| LT1076IQ#PBF | DD PAK | 5 | I | $5.80 | $4.75 |
| LT1076IQ#TR | DD PAK | 5 | I | $4.87 | |
| LT1076IQ#TRPBF | DD PAK | 5 | I | $4.87 | |
| LT1076IR | DD PAK | 7 | I | $6.30 | $5.15 |
| LT1076IR#PBF | DD PAK | 7 | I | $6.30 | $5.15 |
| LT1076IR#TR | DD PAK | 7 | I | $5.27 | |
| LT1076IR#TRPBF | DD PAK | 7 | I | $5.27 | |
| LT1076IT | TO-220 | 5 | I | $5.92 | $4.85 |
| LT1076IT#06PBF | TO-220 | 5 | I | $5.92 | $4.85 |
| LT1076IT#PBF | TO-220 | 5 | I | $5.92 | $4.85 |
| LT1076IT-5 | TO-220 | 5 | I | $5.92 | $4.85 |
| LT1076IT-5#PBF | TO-220 | 5 | I | $5.92 | $4.85 |
LT1076HV 数据手册及相关资料下载
- 数据手册(英文) : LT1074/LT1076- Step-Down Switching Regulator.PDF
- 应用指南 (英文) : AN35 - Step Down Switching Regulators.PDF
- 应用指南 (英文) : AN44 - LT1074/LT1076 Design Manual.PDF
- 应用指南 (英文) : AN46 - Efficiency and Power Characteristics of Switching Regulator Circuits.PDF
- 应用指南 (英文) : AN98 - Signal Sources, Conditioners and Power Circuitry Circuits of the Fall, 2004.PDF
- 设计要点 (英文) : DN48 - No Design Switching Regulator 5V, 5A Buck (Step Down) Regulator.PDF
- 设计要点 (英文) : DN49 - No Design Switiching Regulator 5V Buck-Boost (Positive to Negative) Regulator.PDF
- 可靠性数据 : R117 Reliability Data .PDF
