LM51521-Q1数据手册TI中文资料规格书

特性 Features

• AEC-Q100 qualified for automotive applications
• Temperature grade 1: –40°C to +125°C, TA

• Suited for wide operating range automotive battery powered applications
• 3.8-V to 42-V input operating range
• Dynamically programmable VOUT from 5 V to 20 V (protection up to 57 V)
• Minimum boost input 0.8 V when BIAS ≥ 3.8 V
• Bypass operation when VSUPPLY > VLOAD (LM5152 only, see the device comparison table)

• Minimized battery drain
• Shutdown current ≤ 3 µA
• Automatic mode transition
• Battery drain in deep sleep ≤ 11 µA (bypass operation, charge pump off)
• Battery drain in deep sleep ≤ 33 µA (bypass operation, charge pump on)
• BIAS IQ in sleep ≤ 13 µA (skip mode)
• Strong 5-V MOSFET drivers

• Small solution size and low cost
• Maximum switching frequency: 2.2 MHz
• Internal boot diode
• Constant peak current limit over VIN
• Supports DCR inductor current sensing
• QFN-20 with wettable flanks

• Avoid AM band interference and crosstalk
• Optional clock synchronization
• Switching frequency from 100 kHz to 2.2 MHz
• Selectable switching mode (FPWM, diode emulation, skip mode)

• EMI mitigation
• Optional programmable spread spectrum
• Lead-less package

• Programmability and flexibility
• Dynamic VOUT tracking
• Dynamic switching frequency programming
• Programable line UVLO
• Adjustable soft start
• Adaptive dead time
• Boost STATUS indicator

• Integrated protection features
• Cycle-by-cycle peak current limit
• Overvoltage protection
• HB-SW short protection
• Thermal shutdown