Analog Devices Inc. 多相降压型电压模式直流/直流控制器
Analog Devices Inc.多相降压型电压模式直流/直流控制器是具有精确电流共享的外部电源开关降压控制器。LTC7851和LTC3861的电源电压范围为3V至5.5V，电压基准为±0.75% 0.6V。无损电流检测用于输出电流检测或维持相间电流平衡并提供过电流保护。直流/直流控制器非常适合用于具有内部电流检测功能的DrMOS器件。
特性
- LTC3861
- Operates with power blocks, DrMOS or external gate drivers, and MOSFETs
- Constant-frequency voltage mode control with accurate current sharing
- ±0.75% 0.6V voltage reference
- Dual differential output voltage sense amplifiers
- Multiphase capability—up to 12-phase operation
- Programmable current limit
- Safely powers a pre-biased load
- Programmable or PLL-synchronizable switching frequency up to 2.25MHz
- Lossless current sensing using inductor DCR or precision current sensing with sense resistor
- 3V to 5.5V VCC range
- 3V to 24V VIN range
- Power good output voltage monitor
- Output voltage tracking capability
- Programmable soft-start
- Available in a 36-pin 5mm × 6mm QFN package
- LTC7851
- Operates with power blocks, DrMOS or external gate drivers, and MOSFETs
- Voltage mode control with accurate current sharing
- ±0.75% 0.6V voltage reference
- Quad differential output voltage sense amplifiers
- Multiphase capability
- Phase-lockable fixed frequency 250kHz to 2.25MHz
- Lossless current sensing using inductor DCR or precision current sensing with sense resistor or DrMOS with integrated current sensing
- 3V to 5.5V VCC range
- 0.6V to VCC – 0.5V VOUT range
- Power good output voltage monitor
- Output voltage tracking capability with soft-start
- Available in 58-lead 5mm × 9mm QFN package
应用
- High current distributed power systems
- DSP, FPGA, and ASIC supplies
- Datacom, telecom, and computing systems
- Industrial power supplies
LTC7851 Typical Application
LTC3861 Typical Application
发布日期: 2017-05-02
| 更新日期: 2022-03-14