Datasheet > A8590KLPTR-T

A8590KLPTR-T

更新时间： 2022-02-26 13:58:15

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
38页	3440K
描述
Wide Input Voltage, 2.4 MHz, 3.0 A Asynchronous Buck Regulator With Low-IQ Standby, Sleep Mode, External Synchronization, and NPOR Output

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A8590KLPTR-T 数据手册

A8590

Wide Input Voltage, 2.4 MHz, 3.0 AAsynchronous Buck Regulator With Low-IQ

Standby, Sleep Mode, External Synchronization, and NPOR Output

FEATURES AND BENEFITS

DESCRIPTION

Designed to provide the power supply requirements of next

generation car audio and infotainment systems, the A8590

provides all the control and protection circuitry to produce a

high current regulator with ±1.0% output voltage accuracy.

The A8590 employs pulse frequency modulation (PFM) to

draw less than 50 μA from 12 V_INwhile supplying 3.3 V/40

μA. After startup, theA8590 operates down to at least 3.6 V_IN

(V_INfalling).

• Automotive AEC-Q100 qualified

• Withstands surge voltages up to 40 V

• Operates as low as 3.4 V_IN(typ) with V_INdecreasing

• Utilizes pulse frequency modulation (PFM) to draw only

tens of microamperes from VIN while maintaining keep-

alive VOUT

• PWM/PFM mode control input pin

• Delivers up to 3.0 A of output current with integrated 110

mΩ high voltage MOSFET

FeaturesoftheA8590includeaPWM/PFMmodecontrolinput

to enable PWM (logic high) or PFM (logic low). If the PWM/

PFM input is driven by an external clock signal higher than the

base frequency (f_OSC) the PWM frequency synchronizes to the

incoming clock frequency. The SLEEP input pin commands

an ultra-low current shutdown mode requiring less than 5 μA

for internal circuitry and 10 μA (max) for MOSFET leakage

at 16 V_IN, 85ºC. The A8590 has external compensation

to accommodate a wide range of frequencies and external

components, and provides a power-on reset (NPOR) signal

validated by the output voltage. TheA8590 utilizes Enhanced

• SLEEP input pin commands ultra-low current shutdown

mode

• Adjustable output voltage with ±1.0% accuracy from

0°Cto 85°C, ±1.5% from –40°C to 150°C

• Programmable switching frequency: 250 kHz to 2.4 MHz

• Synchronization capability: applying a clock input

to thePWM/PFM input pin will increase the PWM

frequency

Continued on next page...

Package: 16-Pin TSSOP with Exposed

Themal Pad (suffix LP)

APPLICATIONS

• Automotive:

□ Instrument Clusters

□ Audio Systems

□ Navigation

□ HVAC

• Home audio

Not to scale

V_IN

VIN

BOOT

C_BOOT

C_IN

L₀

VOUT

GND

C_O

D₁

COMP

R_Z

C_Z

BIAS

A8590

FSET

VREG

R_FB1

R_FSET

C_P

C_SS

C_VREG

C_FB

R_FB2

3.3 v

R_PU

SLEEP

10 KW

Mode

PWM/PFM

NPOR

Typical Application Diagram

A8590-DS, Rev. 2

12 3 4 5 6 7...38

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