Datasheet > A4410

A4410

更新时间： 2024-09-18 01:19:47

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
41页	1643K
描述
Programmable watchdog timer with a 30 ms activation delay

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中文翻译

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数据手册

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A4410 数据手册

A4410

Adjustable Frequency Buck or Buck/Boost Pre-Regulator with a

Synchronous Buck, 3 Internal LDOs, Window Watchdog Timer, and NPOR

DESCRIPTION

FEATURES AND BENEFITS

• Automotive AEC-Q100 qualified

TheA4410 is power management IC that uses a buck or buck/

boost pre-regulator to efficiently convert automotive battery

voltagesintoatightlyregulatedintermediatevoltagecomplete

with control, diagnostics, and protections. The output of the

pre-regulator supplies a 5 V/250 mA_MAXtracking/protected

LDO, a 3.3 V/160 mA_MAXLDO, a 5 V/150 mA_MAXLDO,

and a 1.25 V/750 mA_DC/1A_PEAKsynchronous buck regulator.

Designed to supply CAN or microprocessor power supplies in

high temperature environments the A4410 is ideal for under

hood applications.

• 2.8 V_INto 36 V_INoperating range, 40 V_INmaximum

• Buck or buck/boost pre-regulator (VREG)

• Adjustable PWM switching frequency: 250 kHz –

2.4 MHz

• PWM frequency can be synchronized to external clock

• 1.25 V/750 mA_DC/1 A_PEAKsynchronous buck (1V25)

• 3.3 V (3V3) and 5 V (V5) internal LDO regulators with

fold back short circuit protections

• 5 V (V5P) internal tracking LDO regulator with fold

back short circuit and short-to-battery protections

• TRACK sets either 3V3 or V5 as the reference for V5P

• Power-on reset with fixed delay of 15 ms for 1V25/3V3

UV and OV protection (NPOR)

EnableinputstotheA4410includealogiclevel(ENB)andtwo

high-voltage (ENBAT1 and ENBAT2). The A4410 provides

flexibility by including a TRACK pin to set the reference of

the tracking regulator to either the 5 V or the 3.3 V output,

so the A4410 can be adapted across multiple platforms with

different sensors and supply rails.

• Programmable watchdog timer with a 30 ms activation

delay

• Active low, watchdog timer enable/disable pin (WD_ENn

• Dual band gaps for increased reliability: BG_VREF

)

Diagnostic outputs from the A4410 include a power-on-reset

output (NPOR) with a fixed 15 ms delay, an ENBAT1 and

ENBAT2 status outputs, and a PowerOK output for the 5 V

and 5 V protected LDOs (POK5V). Dual bandgaps, one for

regulation and one for fault checking, improve long-term

reliability of the A4410.

BG_FAULT

Continued on next page...

APPLICATIONS

• Automotive Control Modules for:

□ Electronic Power

Steering (EPS)

□ Transmission Control

(TCU)

□ Advanced Braking

Systems (ABS)

□ Emissions Control

Modules

□ Other automotive

applications

The A4410 contains a Window Watchdog timer that can be

programmed to accept a wide range of clock frequencies

(WD_ADJ). The watchdog timer has a fixed 30 ms activation

delay to accommodate processor startup. The watchdog timer

has an enable/disable pin (active LOW, WD_ENn) to facilitate

initial factory programming or field re-flash programming.

Protection features include under and over voltage lockout on

all four CPU supply rails. In case of a shorted output, all linear

regulatorsfeaturefoldbackovercurrentprotection.Inaddition,

theV5Poutput is protected from a short-to-battery event. Both

PACKAGE: 38-Pin eTSSOP (suffix LV)

Continued on next page...

Not to scale

Programmable

Pulse Width

Watchdog

Timer with

Activation Delay

5.35 V

(VREG)

Buck-Boost

Pre-regulator

1.25 V

(1V25)

Sync. Buck

Regulator

3.3 V LDO

(3V3)

with Foldback

Protection

5 V LDO

(V5)

with Foldback

Protection

5 V LDO

(V5P)

with Tracking,

Foldback, and

Short to VBAT

Protetction

Tracking

3V3

Thermal

Shutdown

(TSD)

Dual

Bandgaps

Charge

Pump

POK5V

Output

NPOR

Output

Control

2:1 MUX

REF

A4410 Simpliﬁed Block Diagram

A4410-DS

12 3 4 5 6 7...41

中文翻译

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与A4410相关器件

型号	品牌	获取价格	描述	数据表
A4410KLVTR-T	ALLEGRO	获取价格	Programmable watchdog timer with a 30 ms activation delay
A4411	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A441-1	AMPHENOL	获取价格	Circular Connector, 40 Contact(s), Aluminum Alloy, Male, Receptacle,
A4411KLVTR-T	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A441-2	AMPHENOL	获取价格	Circular Connector, 40 Contact(s), Aluminum Alloy, Female, Receptacle,
A441-4	AMPHENOL	获取价格	Circular Connector, 40 Contact(s), Aluminum Alloy, Female, Plug,
A4414B-20/SUBC/S400-A6	EVERLIGHT	获取价格	3mm 1Pcs Circuit Board Indicator
A4414B-20-SUBC-S400-A6	EVERLIGHT	获取价格	3mm 1Pcs Circuit Board Indicator
A441-6	AMPHENOL	获取价格	Circular Connector, 40 Contact(s), Aluminum Alloy, Female, Receptacle,
A441-7	AMPHENOL	获取价格	Circular Connector, 40 Contact(s), Aluminum Alloy, Male, Receptacle,

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