LT1676 Wide Input Range, High Efficiency, Step-Down Switching Regulator
The LT®1676 is a wide input range, high efficiency Buck (step-down) switching regulator. The monolithic die includes all oscillator, control and protection circuitry. The part can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current. Current mode control offers excellent dynamic input supply rejection and short-circuit protection. The LT1676 contains several features to enhance efficiency. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply (see Applications Information). The action of the LT1676 switch circuitry is also load dependent. At medium to high loads, the output switch circuitry maintains high rise time for good efficiency. At light loads, rise time is deliberately reduced to avoid pulse skipping behavior. The available SO-8 package and 100kHz switching frequency allow for minimal PC board area requirements
产品特点 Features
- Wide Input Range: 7.4V to 60V
- 700mA Peak Switch Current Rating
- Adaptive Switch Drive Maintains Efficiency at High
- Load Without Pulse Skipping at Light Load
- True Current Mode Control
- 100kHz Fixed Operating Frequency
- Synchronizable to 250kHz
- Low Supply Current in Shutdown: 30µA
- Available in 8-Pin SO and PDIP Packages
参数
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应用
- Automotive DC/DC Converters
- Telecom 48V Step-Down Converters
- Cellular Phone Battery Charger Accessories
- IEEE 1394 Step-Down Converters
典型应用图
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LT1676 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) * |
| LT1676CN8 |
PDIP |
8 |
C |
$3.15 |
$2.60 |
| LT1676CN8#PBF |
PDIP |
8 |
C |
$3.15 |
$2.60 |
| LT1676CS8 |
SO |
8 |
C |
$3.25 |
$2.65 |
| LT1676CS8#PBF |
SO |
8 |
C |
$3.25 |
$2.65 |
| LT1676CS8#TR |
SO |
8 |
C |
|
$2.71 |
| LT1676CS8#TRPBF |
SO |
8 |
C |
|
$2.71 |
| LT1676IN8 |
PDIP |
8 |
I |
$3.70 |
$3.00 |
| LT1676IN8#PBF |
PDIP |
8 |
I |
$3.70 |
$3.00 |
| LT1676IS8 |
SO |
8 |
I |
$3.85 |
$3.15 |
| LT1676IS8#PBF |
SO |
8 |
I |
$3.85 |
$3.15 |
| LT1676IS8#TR |
SO |
8 |
I |
|
$3.21 |
| LT1676IS8#TRPBF |
SO |
8 |
I |
|
$3.21 |
LT1676 数据手册及相关资料下载
- 数据手册(英文) : LT1676 - Wide Input Range, High Efficiency, Step-Down Switching Regulator.PDF
- 设计要点 (英文) : DN202 - 60V, High Efficiency Buck Switching Regulators in SO-8.PDF
- 设计要点 (英文) : DN212 - LT1777 High Voltage, Low Noise Buck Switching Regulator.PDF
- 可靠性数据 : R012 Reliability Data .PDF
