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LM5143-Q1
- AEC-Q100 qualified for automotive applications:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Functional Safety-Capable
- Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 65 V
- 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 55 V
- 150°C maximum junction temperature
- Shutdown mode current: 4 µA typical
- No-load standby current: 15 µA typical
- Two interleaved synchronous buck channels
- Dual-channel or single-output multiphase
- 65-ns tON(min) for high VIN/VOUT ratio
- 60-ns tOFF(min) for low dropout
- Inherent protection features for robust design
- Hiccup-mode overcurrent protection
- Independent ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Thermal shutdown protection with hysteresis
- Optimized for ultra-low EMI requirements
- Slew-rate controlled adaptive gate drivers
- Spread spectrum reduces peak emissions
- Optimized for CISPR 25 Class 5 requirements
- Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable diode emulation or FPWM
- VQFNP-40 pacakge with wettable flank pins
- Create a custom design using the LM5143-Q1 with WEBENCH Power Designer
The LM5143-Q1 is a 65-V synchronous buck DC/DC controller for high-current single or dual outputs. The device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output current. A high-side switch minimum on-time of 65 ns gives large step-down ratios, enabling the direct conversion from 12-V, 24-V, or 48-Vautomotive inputs to low-voltage rails for reduced system complexity and solution cost. The LM5143-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
Current is sensed using the inductor DCR for highest efficiency or an optional shunt resistor for high accuracy. The 15-µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery-powered systems. Power the LM5143-Q1 from the output of the switching regulator or another available source for even lower input quiescent current and power loss.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM5143-Q1 Automotive 3.5-V to 65-V Dual Synchronous Buck Controller With Low IQ datasheet (Rev. C) | PDF | HTML | 2021年 6月 2日 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點