LT1619 Low Voltage Current Mode PWM Controller
The LT®1619 is a fixed frequency PWM controller for implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input voltages ranging from 1.9V to 18V and is suitable for a variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver operates either from the input in the nonbootstrapped mode or from the output in bootstrapped operation. The driver is designed to drive a low side power transistor inboost, SEPIC, flyback and other topologies.
Converter efficiency is improved at heavy loads with a53mV current sense voltage and at light load with Burst Mode operation. The operating frequency is internally setat 300kHz. The oscillator can also be synchronized externally up to 500kHz. No load quiescent current is 140µA and shutdown current is 15µA.
The LT1619 is available in 8-lead MSOP and SO packages
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LT1619 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) * |
| LT1619CMS8 | MSOP | 8 | C | $3.10 | $2.65 |
| LT1619CMS8#PBF | MSOP | 8 | C | $3.10 | $2.65 |
| LT1619CMS8#TR | MSOP | 8 | C | $2.71 | |
| LT1619CMS8#TRPBF | MSOP | 8 | C | $2.71 | |
| LT1619CS8 | SO | 8 | C | $2.85 | $2.40 |
| LT1619CS8#PBF | SO | 8 | C | $2.85 | $2.40 |
| LT1619CS8#TR | SO | 8 | C | $2.46 | |
| LT1619CS8#TRPBF | SO | 8 | C | $2.46 | |
| LT1619IMS8 | MSOP | 8 | I | $3.55 | $3.00 |
| LT1619IMS8#PBF | MSOP | 8 | I | $3.55 | $3.00 |
| LT1619IMS8#TR | MSOP | 8 | I | $3.06 | |
| LT1619IMS8#TRPBF | MSOP | 8 | I | $3.06 | |
| LT1619IS8 | SO | 8 | I | $3.45 | $2.90 |
| LT1619IS8#PBF | SO | 8 | I | $3.45 | $2.90 |
| LT1619IS8#TR | SO | 8 | I | $2.96 | |
| LT1619IS8#TRPBF | SO | 8 | I | $2.96 |
LT1619 数据手册及相关资料下载
- 数据手册(英文) : LT1619 - Low Voltage Current Mode PWM Controller.PDF
- 设计要点 (英文) : DN255 - LT1619: Tiny Boost Controller Provides Efficient Solutions for Low Voltage Inputs.PDF
- 可靠性数据 : R389 Reliability Data .PDF
