A8583

更新时间： 2024-10-28 12:51:19

品牌	Logo	应用领域
急速微 - ALLEGRO		稳压器
页数	文件大小	规格书
33页	841K
描述
The A8583 is an adjustable frequency, high output current, PWM regulator that integrates a low resistance, high-side, N-channel MOSFET.

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A8583 数据手册

A8583

Wide Input Voltage, 2.4 MHz, 3.5 A

Asynchronous Buck Regulator

Description

Features and Benefits

• Wide operating voltage range: 4.7 to 36 V

• UVLO stop threshold is at 3.8 V (typ)

• Supports 40 V input for surge and load dump testing

• Capable of at least 3.5 A steady-state output current

• Adjustable output voltage as low as 0.8 V

• Internal 70 mΩ high-side switching MOSFET

• Adjustable switching frequency, f_SW: 0.25 to 2.4 MHz

• Synchronization to external clock: 1.2×f_SWto 1.5×f_SW

• Sleep mode supply current less then 3 μA

• Soft start time externally set via the SS pin

• Very low no-load current, typically 3.5 mA

• Pre-bias startup compatible

The A8583 is an adjustable frequency, high output current,

PWM regulator that integrates a low resistance, high-side,

N-channel MOSFET. The A8583 incorporates current-mode

control to provide simple compensation, excellent loop

stability, and fast transient response. The A8583 utilizes

external compensation to accommodate a wide range of power

components to optimize transient response without sacrificing

stability.

The A8583 regulates input voltages from 4.7 to 36 V, down to

output voltages as low as 0.8 V, and is able to supply at least

3.5Aof load current.TheA8583 features include an externally

adjustable switching frequency, an externally set soft start

time to minimize inrush currents, an EN/SYNC input to either

enable VOUT and/or synchronize the PWM switching

frequency, and a Power OK (POK) output to indicate when

VOUTiswithinregulation.TheA8583onlyturns-onthelower

FETtochargethebootcapacitorwhenneeded,noteveryPWM

• Power OK (POK) output

• Pulse-by-pulse current limiting (OCP)

• Hiccup mode short-circuit protection (HIC)

• Overtemperature protection (TSD)

• Overvoltage protection (OVP)

• Missing asynchronous diode (D1) protection

• Open-circuit and adjacent pin short-circuit tolerant

• Short-to-ground tolerant at every pin

• Externally adjustable compensation

• Stable with ceramic output capacitors

Continued on the next page…

Package: 16-pin TSSOP (suffix LP)

Applications:

• GPS/infotainment

• Automobile audio

• Home audio

• Network and telecom

Not to scale

Typical Application

1.5 μH

V_IN

VOUT

VIN

CIN1

3.3 μF

50 V

CIN2

CBOOT

100 nF

CO1

10 μF

16 V

CO2

10 μF

16 V

VIN

50 V

4 A/40 V

SMB

A8583

Empty

GND

RS1

16.5 kΩ

BOOT

FBX

EN/SYNC

RS2

5.23 kΩ

CFBX

120 pF

CSS

22 nF

FSET

COMP

RFB1

16.5 kΩ

3.3V

RFSET

11.5 kΩ

RFB2

5.23 kΩ

PAD

18.2 kΩ

RPU

2 kΩ

4.7 pF

1.2 nF

POK

Figure 1. Application schematic, at V_IN5 to 16 V, 3.3 V_OUT, at 2 MHz

A8583-DS, Rev. 14

12 3 4 5 6 7...33

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与A8583相关器件

型号	品牌	获取价格	描述	数据表
A8583KLPTR-T	ALLEGRO	获取价格	The A8583 is an adjustable frequency, high output current, PWM regulator that integrates a
A8584	ALLEGRO	获取价格	The A8584 is an adjustable frequency, high output current, PWM regulator that integrates a
A8584KLPTR-T	ALLEGRO	获取价格	The A8584 is an adjustable frequency, high output current, PWM regulator that integrates a
A8585	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A8585KLKTR-1-T	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A8585KLKTR-2-T	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A8585KLKTR-3-T	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A8585KLKTR-T	ALLEGRO	获取价格	Automotive AEC-Q100 qualified
A8586	ALLEGRO	获取价格	Output voltage adjustable from 0.8 to 30 V
A8586-1	ALLEGRO	获取价格	Output voltage adjustable from 0.8 to 30 V

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