LM5168-Q1数据手册TI中文资料规格书

描述 Description

The LM5169-Q1 and LM5168-Q1 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5169-Q1 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5169-Q1 delivers up to 0.65-A of output current and the LM5168-Q1 delivers up to 0.3-A of output current. A constant on time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LM5169-Q1 is available in FPWM or Auto mode operation. FPWM mode ensures forced CCM operation across the entire load range supporting isolated Fly-buck operation. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.

特性 Features

• AEC-Q100-qualified for automotive applications
• Device temperature grade 1: –40°C to +125°C, ambient temperature range

• Designed for reliable and rugged applications
• Wide input voltage range of 6 V to 120 V
• Junction temperature range: –40°C to +150°C
• Fixed 3-ms internal soft-start timer
• Peak and valley current-limit protection
• Input UVLO and thermal shutdown protection

• Suited for scalable automotive HEV/EV power supplies
• Low minimum on and off times of 50 ns
• Adjustable switching frequency up to 1 MHz
• Diode emulation for high light-load efficiency
• Auto mode with low-quiescent current (LM5164-Q1, LM5163-Q1, LM5017, and LM34927

• Integration reduces solution size and cost
• COT mode control architecture
• Integrated 1.9-Ω NFET buck switch
• Integrated 0.71-Ω NFET synchronous rectifier
• 1.2-V internal voltage reference
• No loop compensation components
• Internal VCC bias regulator and boot diode
• Open-drain power-good indicator
• 8-pin SOIC package with PowerPAD™ with 30°C/W RθJA (EVM)