LM34938-Q1
- Input range from 3.5V to 36V
- Dynamical Vo programming using I2C from:
- 1V up to 45V in 20mV monotonous steps
- 1V up to 23V in 10mV monotonous steps
- Peak current regulation control
- Small voltage transition ripple overall operating modes
- Dynamic output voltage tracking (digital PWM tracking input, analog tracking input)
- Via I2C interface programming
- Shut down quiescent current 3µA
- Operating quiescent current 60µA
- Drive (DRV) pin for dual role port power path
- Push-Pull output for fast pMOS FET control
- Configurable as charge pump driver stage for nMOS FET
- Operation mode selection for high efficiency in light load and high load conditions:
- Power save mode (Single Pulse/µSleep)
- Automatic conduction mode
- Integrated high voltage supply LDO
- Auxiliary high voltage LDO for microcontroller supply
- Integrated full-bridge gate drive
- 2A peak current capability
- Bootstrap over and undervoltage protection
- Integrated boot-strap diode
- Fixed frequency independent from operating mode (boost, buck-boost, buck)
- Forced PWM mode selectable
- Switching frequency from 100kHz to 2200kHz
- External clock synchronization and clock output
- Spread spectrum operation selectable
- Average input or output current sensor
- I2C programmable with diagnostics
- Automotive temperature range (Tj = -40°C to 150°C)
- 40-Pin WSON package with wettable flanks
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Create a custom design using the LM34938-Q1 with the WEBENCH® Power Designer
The LM34938-Q1 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal or lower than the adjusted output voltage. In power save mode the device supports very high efficiency over the complete operation range of the output. The output voltage and average current is dynamically programmable using the integrated I2C interface. The integrated DRV pin is used to control an optional disconnect FET for reverse polarity protection
LM34938-Q1 runs at a fixed switching frequency, which is set using the RT/SYNC pin. The switching frequency remains the same during buck, boost and buck-boost operation. The device maintains small mode transition ripple over all operating modes.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 날짜 |
|---|---|---|---|---|
| * | Data sheet | LM34938-Q1 36V VIN 4 Switch Buck-Boost Controller With I2C for Wireless Charging datasheet | PDF | HTML | 2026/02/10 |
| EVM User's guide | LM34938-Q1 Buck-Boost Controller Evaluation Module | PDF | HTML | 2026/03/12 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
LM251772EVM-PD — LM251772 평가 모듈
LM34938Q1EVM-HD — LM34938-Q1 evaluation module
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RHA) | 40 | Ultra Librarian |
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
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.