Datasheet > A4450

A4450

更新时间： 2024-11-08 01:23:27

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
34页	680K
描述
Buck-Boost Controller with Integrated Buck MOSFET

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中文翻译

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A4450 数据手册

A4450

Buck-Boost Controller with Integrated Buck MOSFET

FEATURES AND BENEFITS

DESCRIPTION

• Automotive AEC-Q100 qualified

The A4450 is a power management IC that can implement

either a buck or buck-boost regulator to efficiently convert

automotive battery voltages into a tightly regulated voltage. It

includes control, diagnostics, and protection functions.

• Wide operating range of 3 to 36 V_IN, 40 V_INmaximum,

covers automotive stop/start, cold crank, double battery,

and load dump

• Regulated output can range from 3 to 8 V at up to 1 A DC

• Adjustable PWM switching frequency:

250 kHz to 2.2 MHz

An enable input to the A4450 is compatible to a high-voltage

battery level, (EN).

• PWM frequency can be synchronized to external clock:

250 kHz to 2.4 MHz

Adiagnostic output from theA4450 includes a power-on reset

output (NPOR) signal.

• Frequency dithering helps reduce EMI/EMC

• Undervoltage protection

• Pin-to-pin and pin-to-ground tolerant at every pin

• Thermal shutdown protection

Protectionfeaturesincludepulse-by-pulsecurrentlimit,hiccup

mode short-circuit protection, LX short-circuit protection,

missing freewheeling diode (buck diode at LX node inA4450)

protection, and thermal shutdown.

• Operating junction temperature range −40°C to 150°C

The A4450 is most suitable for applications where the input

voltage can vary from less than or greater than the regulated

output voltage.

PACKAGES:

20-pin 4 × 4 mm QFN (ES) with wettable flank

The A4450 is supplied in 4 × 4 mm QFN (suffix “ES”) with

exposed power pad.

APPLICATIONS

• Infotainment

• Instrument Clusters

• Control Modules

Not to scale

VBAT

BOOT

VIN

D2 Boost

Diode

V_OUT

Buck

Diode

AVIN

A4450

COMP

RNG

FSET /SYNC

NPOR

GND

PGND

Typical Application Diagram

A4450-DS

12 3 4 5 6 7...34

中文翻译

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