LTC1624 High Efficiency SO-8 N-Channel Switching Regulator Controller
The LTC®1624 is a current mode switching regulator controller that drives an external N-channel power MOSFET using a fixed frequency architecture. It can be operated in all standard switching configurations including boost, step-down, inverting and SEPIC. Burst Mode™ operation provides high efficiency at low load currents. A maximum high duty cycle limit of 95% provides low dropout operation which extends operating time in battery-operated systems. The operating frequency is internally set to 200kHz, allowing small inductor values and minimizing PC board space. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 36V (absolute maximum). A multifunction pin (ITH/RUN) allows external compensation for optimum load step response plus shutdown. Soft start can also be implemented with the ITH/RUN pin to properly sequence supplies
产品特点 Features
- N-Channel MOSFET Drive
- Implements Boost, Step-Down, SEPIC and Inverting Regulators
- Wide VIN Range: 3.5V to 36V Operation
- Wide VOUT Range: 1.19V to 30V in Step-Down Configuration
- ±1% 1.19V Reference
- Low Dropout Operation: 95% Duty Cycle
- 200kHz Fixed Frequency
- Low Standby Current
- Very High Efficiency
- Remote Output Voltage Sense
- Logic-Controlled Micropower Shutdown
- Internal Diode for Bootstrapped Gate Drive
- Current Mode Operation for Excellent Line and Load Transient Response
- Available in an 8-Lead SO Package
参数
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应用
- Notebook and Palmtop Computers, PDAs
- Cellular Telephones and Wireless Modems
- Battery-Operated Digital Devices
- DC Power Distribution Systems
- Battery Chargers
典型应用图
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LTC1624 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) * |
| LTC1624CS8 |
SO |
8 |
C |
$4.30 |
$3.50 |
| LTC1624CS8#PBF |
SO |
8 |
C |
$4.30 |
$3.50 |
| LTC1624CS8#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1624CS8#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1624IS8 |
SO |
8 |
I |
$5.50 |
$4.45 |
| LTC1624IS8#PBF |
SO |
8 |
I |
$5.50 |
$4.45 |
| LTC1624IS8#TR |
SO |
8 |
I |
|
$4.51 |
| LTC1624IS8#TRPBF |
SO |
8 |
I |
|
$4.51 |
LTC1624 数据手册及相关资料下载
- 数据手册(英文) : LTC1624 - High Efficiency SO-8 N-Channel Switching Regulator Controller.PDF
- 应用指南 (英文) : AN84 - linear Technology Magazine Circuit Collection, Volume IV .PDF
- 设计要点 (英文) : DN208 - Low Dropout 550kHz DC/DC Controller Operates from Inputs as Low as 2V.PDF
- 可靠性数据 : R393Reliability Data .PDF
