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LM51521-Q1

Texas Instruments
Part Number LM51521-Q1
Manufacturer Texas Instruments
Description Synchronous Boost Controller
Published Jan 1, 2023
Detailed Description LM5152-Q1, LM51521-Q1 SLVSFF2A – FEBRUARY 2022 – REVISED APRIL 2022 LM5152x-Q1 Automotive Low-IQ Synchronous Boost Contr...
Datasheet PDF File LM51521-Q1 PDF File

LM51521-Q1
LM51521-Q1

Overview
LM5152-Q1, LM51521-Q1 SLVSFF2A – FEBRUARY 2022 – REVISED APRIL 2022 LM5152x-Q1 Automotive Low-IQ Synchronous Boost Controller for Start-Stop/Backup Battery Power Supply 1 Features • AEC-Q100 qualified for automotive applications • EMI mitigation – Optional programmable spread spectrum – Lead-less package – Temperature grade 1: –40°C to +125°C, TA • Functional Safety-Capable – Documentation available to aid functional safety • Programmability and flexibility – Dynamic VOUT tracking – Dynamic switching frequency programming system design – Programmable line UVLO • Suited for wide operating range automotive battery – Adjustable soft start powered applications – Adaptive dead time – 3.
8-V to 42-V input operating range – Dynamically programmable VOUT from 5 V to 20 V (protection up to 57 V) – Boost STATUS indicator • Integrated protection features – Cycle-by-cycle peak current limit – Minimum boost input 0.
8 V when BIAS ≥ 3.
8 V – Overvoltage protection – Bypass operation when VSUPPLY > VLOAD (LM5152 only, see the device comparison – HB-SW short protection – Thermal shutdown table) • Minimized battery drain 2 Applications – 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 • High power/high current automotive start-stop application (head unit) • Voltage stabilizer module • Emergency call application • Backup battery/super capacitor powered boost converter • Automotive redundant power supply 3 Description The LM5152x-Q1 (LM5...


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