LT1573 Low Dropout Regulator Driver
The LT®1573 is a regulator driver IC designed to provide a low cost solution for applications requiring high current, low dropout and fast transient response. When combined with an external PNP power transistor, this device provides load current up to 5A with dropout voltages as low as 0.35V. The LT1573 circuitry is designed for extremely fast transient response. This greatly reduces bulk storage capacitance when the regulator is used in applications with fast, high current load transients. To keep cost and complexity low, the LT1573 uses a new time-delayed latching overcurrent protection technique that requires no external current sense resistor. Base drive is limited for instantaneous protection, and a time-delayed latch protects the regulator from continuous short circuits. The LT1573 is available as an adjustable regulator with an output range of 1.27V to 6.8V and with fixed output voltages of 2.5V, 2.8V and 3.3V. Output accuracy is better than 1% to meet the critical regulation requirement of fast microprocessors. A special 8-pin, fused-lead surface mount package is used to minimize regulator footprint and provide adequate heat sinking
产品特点 Features
- Low Cost Solution for High Current, Low Dropout Regulators
- Fast Transient Response Needs Much Less Bulk Capacitance
- Latching Overload Protection Minimizes Heat Sink Size
- Precision Output Voltage (1%)
- Single Supply Operation: VIN = 2.8V to 10V
- Small Surface Mount Package
- Capable of Very Low Dropout Voltage (<0.2V)
- Fixed or Adjustable Outputs
- Shutdown
参数
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应用
- 3.3V to 2.5V Regulator
- Microprocessor Power Source
- Post Regulator for Switching Supplies
- High Efficiency linear Regulators
- Ultralow Dropout Regulators
- Low Voltage linear Regulators
典型应用图
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LT1573 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) * |
| LT1573CS8 |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8#PBF |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8#TR |
SO |
8 |
C |
|
$1.81 |
| LT1573CS8#TRPBF |
SO |
8 |
C |
|
$1.81 |
| LT1573CS8-2.5 |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8-2.5#PBF |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8-2.5#TR |
SO |
8 |
C |
|
$1.81 |
| LT1573CS8-2.5#TRPBF |
SO |
8 |
C |
|
$1.81 |
| LT1573CS8-2.8 |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8-2.8#PBF |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8-3.3 |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573CS8-3.3#PBF |
SO |
8 |
C |
$2.05 |
$1.75 |
| LT1573IS8 |
SO |
8 |
I |
$2.50 |
$2.10 |
| LT1573IS8#PBF |
SO |
8 |
I |
$2.50 |
$2.10 |
| LT1573IS8#TR |
SO |
8 |
I |
|
$2.16 |
| LT1573IS8#TRPBF |
SO |
8 |
I |
|
$2.16 |
LT1573 数据手册及相关资料下载
- 数据手册(英文) : LT1573 - Low Dropout Regulator Driver.PDF
- 设计要点 (英文) : DN292 - Very Low Dropout (VLDO) linear Regulators Supply Low Voltage Outputs.PDF
- 可靠性数据 : R337 Reliability Data .PDF
