Analog Devices Inc. 다상 벅 전압 모드 DC/DC 컨트롤러
Analog Devices Inc. 다상 강압 전압 모드 DC/DC 컨트롤러는 정확한 전류 공유 장치가 있는 외부 전원 공급 스위치 벅 컨트롤러입니다. LTC7851 및 LTC3861의 공급 전압 범위는 3V~5.5V이며 기준 전압은 ±0.75% 0.6V입니다. 무손실 전류 감지 기능은 출력 전류 감지에 사용하거나 위상 간 전류 균형을 유지하고 과전류 보호 기능을 제공하기 위해 사용됩니다. DC/DC 컨트롤러는 내부 전류 감지 기능이 있는 DrMOS 장치에 적합합니다.
특징
- 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
애플리케이션
- High current distributed power systems
- DSP, FPGA, and ASIC supplies
- Datacom, telecom, and computing systems
- Industrial power supplies
LTC7851 Typical Application
LTC3861 Typical Application
게시일: 2017-05-02
| 갱신일: 2022-03-14