LM51521-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C to +125°C, TA

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• 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

– 2.2-MHz maximum switching frequency

– 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

– 100-kHz to 2.2-MHz switching frequency

– 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

– Programmable 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