TPS40195
- Input Operating Voltage Range: 4.5 V to 20 V
- Output Voltage as Low as 0.591 V ±0.5%
- 180° Bi-Directional Out-of-Phase Synchronization
- Internal 5-V Regulator
- High and Low MOSFET Sense Overcurrent
- 100-kHz to 600-kHz Switching Frequency
- Enable and Power Good
- Programmable UVLO and Hysteresis
- Thermal Shutdown at 150°C
- Selectable Soft Start
- Prebias Output Safe
The TPS40195 is a flexible synchronous buck controller that operates from a nominal 4.5-V to 20-V supply. This controller implements voltage mode control with the switching frequency adjustable from 100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short-circuit limit, programmable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Overcurrent detection is done by sensing the voltage drop across the low-side MOSFET when it is on, and comparing it with a user-programmable threshold.
The threshold is set with a single external resistor connected from ILIM to GND. Pulse-by-pulse limiting (to prevent current runaway) is provided by sensing the voltage across the high-side MOSFET when it is on and terminating the cycle when the voltage drop rises above a fixed threshold of 550 mV. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault. Synchronization on this device is bi-directional. Devices can be synchronized 180° out of phase to a chosen master TPS40195 running at a fixed 250 kHz or 500 kHz, or can be synchronized to an outside clock source anywhere in the 100 kHz to 600 kHz range.
기술 자료
유형 | 직함 | 날짜 | ||
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* | Data sheet | TPS40195 4.5-V to 20-V Synchronous Buck Controller With Synchronization and Power Good datasheet (Rev. F) | PDF | HTML | 2019/06/07 |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치