Texas Instruments LM5152-Q1 Bedienungsanleitung

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LM5152x-Q1 Automotive Low-I

Q

Synchronous Boost Controller for Start-Stop/Backup

Battery Power Supply

1 Features

•AEC-Q100 qualified for automotive applications

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

A

•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 V

OUT

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 V

SUPPLY

> V

LOAD

(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 I

Q

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 V

IN

–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 V

OUT

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

2 Applications

•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 (LM5152-Q1 and LM51521-Q1)

device is a wide input range synchronous boost

controller that employs peak current mode control.

Device Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

LM5152-Q1

QFN (20)3.5 mm × 3.5 mm

LM51521-Q1

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

HO

HB

SW

CSN

BIASVCC

TRK

LO

RT

COMP

SS

CSP

PGND

AGND

UVLO

VOUT

V

LOAD

V

SUPPLY

V

SUPPLY

MODE

SYNC/DITHER

STATUS

VREF

Boost Status

Indicator to MCU

VDD(MCU)

V

LOAD

Typical Application

LM5152-Q1, LM51521-Q1

SLVSFF2A – FEBRUARY 2022 – REVISED APRIL 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen