TPS54478
- Two 30-mΩ (typical) MOSFETs for High Efficiency at 4-A Loads
- 200-kHz to 2-MHz Switching Frequency
- 0.6-V ± 1% Voltage Reference Over Temperature (–40°C to +150°C)
- Start-up With Prebiased Voltage
- Synchronizes to External Clock
- Adjustable Slow Start / Sequencing
- UV and OV Power-Good Output
- Cycle by Cycle Current Limit and Hiccup Current Protection
- Thermally Enhanced 3-mm × 3-mm 16-Pin WQFN (RTE)
- Pin Compatible to TPS54418
- Create a Custom Design Using the TPS54478 With the WEBENCH® Power Designer
The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.
The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.
The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.
Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage start-up ramp is controlled by the soft-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection, and thermal shutdown protect the device during an overcurrent condition.
For more SWIFT™ documentation, see the TI website at www.ti.com/swift.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TPS54478 2.95-V to 6-V Input, 4-A Synchrns Step-Down SWIFT™ Cnvrtr w/ Hiccup datasheet (Rev. B) | 2018/04/18 | |
| Application note | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 2024/03/25 | |
| Analog Design Journal | Control-Mode Quick Reference Guide (Rev. B) | PDF | HTML | 2023/08/29 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 2021/04/08 | ||
| Application note | Calculating Efficiency (Rev. A) | 2020/03/06 | ||
| Application note | Minimizing Output Ripple During Startup (Rev. A) | 2019/05/20 | ||
| Selection guide | SWIFT DC/DC Converters Selector Guide (Rev. G) | 2019/02/06 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| Application note | Minimizing Output Ripple During Startup | 2017/06/22 | ||
| User guide | TPS54478EVM-037 4-A, SWIFT Regulator Evaluation Module | 2011/06/15 | ||
| Application note | Understanding Thermal Dissipation and Design of a Heatsink | 2011/05/04 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
TPS54478EVM-037 — 프리바이어스 시동이 포함된 TPS54478 동기 스텝다운 컨버터용 평가 모듈
TPS54478 Unencrypted PSpice Average Model Package (Rev. A)
TPS54478 Unencrypted PSpice Transient Model Package (Rev. A)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| WQFN (RTE) | 16 | 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