Datasheet > A81407

A81407

更新时间： 2022-06-24 15:42:25

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
58页	3082K
描述
Multi-Output Regulator with Buck or Buck-Boost Pre-Regulator

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A81407 数据手册

Multi-Output Regulator with Buck or Buck-Boost Pre-Regulator,

4× LDO Outputs, Watchdog, 4× Gate Drivers, and SPI

A81407

ELECTRICAL CHARACTERISTICS (continued) ^[1]: Valid at 3.8 V ^[4]≤ V_VIN≤ 36 V, –40°C ≤ T_J≤ 150°C, V_ENB= High or

V_ENBAT= High, unless otherwise speciﬁed

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

MISSING ASYNCHRONOUS DIODE (D1) PROTECTION

Detection Level

Time Filtering ^[2]

V_D(OPEN)

t_D(OPEN)

−1.9

−1.4

−1.0

–

250

VUC, V5A, V5Px LINEAR REGULATORS

VUC Accuracy and Load Regulation

V_VUC5

10 mA < I_VUC< 375 mA, V_VREG= 5.25 V

4.9

5.0

5.1

(5 V_OUT

VUC Accuracy and Load Regulation

(3.3 V_OUT

)

V_VUC33

3.23

3.30

3.37

)

VUC Output Capacitance Range ^[2]

V5A Accuracy and Load Regulation

V5A Output Capacitance Range ^[2]

V5Px Accuracy and Load Regulation

V5Px Output Capacitance Range ^[2]

VUC OVERCURRENT PROTECTION

VUC Current Limit ^[1]

C_OUT(VUC)

V_V5A

C_OUT(V5A)

V_V5Px

1.0

4.9

1.0

4.9

1.0

–

5.0

–

5.1

µF

5 mA < I_V5A< 150 mA, V_VREG= 5.25 V

5 mA < I_V5Px< 120 mA, V_VREG= 5.25 V

µF

5.0

–

5.1

C_OUT(V5Px)

µF

I_VUC(LIM)

I_VUC(FBK)

–412

–65

–625

–187

–880

–275

VUC Foldback Current ^[1]

V_VUC= 0 V

V_V5A= 0 V

V_V5Px= 0 V

V5A OVERCURRENT PROTECTION

V5A Current Limit ^[1]

I_V5A(LIM)

I_V5A(FBK)

–160

–20

–235

–78

–325

–163

V5A Foldback Current ^[1]

V5Px OVERCURRENT PROTECTION

V5Px Current Limit ^[1]

I_V5Px(LIM)

I_V5Px(FBK)

–135

–20

–230

–60

–350

–125

V5Px Foldback Current ^[1]

^[1]For input and output current speciﬁcations, negative current is deﬁned as coming out of the node or pin (sourcing), positive current is deﬁned as going into the node or

pin (sinking).

^[2]Ensured by design and characterization, not production tested.

^[3]Speciﬁcations at 25°C or 85°C are guaranteed by design and characterization, not production tested.

^[4]The lowest operating voltage is only valid if the conditions V_VIN> V_VIN(START)and V_VCP– V_VIN> V_VCP(UV,H)and V_VREGin regulating are satisﬁed before V_VINis reduced.

Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

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