Datasheet > SC508A

SC508A

更新时间： 2024-11-11 11:57:35

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
32页	847K
描述
EcoSpeedÂ® DC-DC Buck Controller with Integrated LDO

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中文翻译

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SC508A 数据手册

SC508/SC508A

EcoSpeed^®DC-DC Buck Controller

with Integrated LDO

POWER MANAGEMENT

Features

Description



Power system

The SC508/SC508A is a synchronous EcoSpeed buck reg-

• Input voltage — 4.5V to 46V

• Integrated bootstrap switch

• Fixed 5V LDO output — 200mA

• 1% reference tolerance -40 to +85 °C

• Selectable internal/external bias power supply

ulator which incorporates Semtech’s advanced, patented

adaptive `on-time control architecture to provide excel-

lent light-load eﬃciency and fast transient response. It

features an integrated bootstrap switch and a ﬁxed 5V

LDO in a 3 x 3(mm) package. The device is highly eﬃcient

and uses minimal PCB area. The SC508A is available for

automotive applications and is qualiﬁed to AEC-Q100.

• EcoSpeed architecture with pseudo-ﬁxed fre-

quency adaptive on-time control

Logic input and output control

• Independent control EN for LDO and switcher

• Programmable soft-start time

• Programmable V_INUVLO threshold

• Power Good output



The SC508 supports using standard capacitor types such as

electrolyticorspecialpolymer,inadditiontoceramic,atswitch-

ing frequencies up to 1MHz. The programmable frequency,

synchronous operation, and programmable power-save

provide high eﬃciency operation over a wide load range.

• Selectable power-save mode

• Programmable ultrasonic power-save mode

Protections



Additional features include cycle-by-cycle current limit,

programmable soft-start, under and over-voltage protec-

tion, programmable over-current protection, start-up into

pre-biased output, automatic fault recovery (hiccup restart),

soft-shutdown, selectable power-save modes, and pro-

grammable ultrasonic power-save. The device also provides

separate enable inputs for the PWM controller and LDO as

well as a power good output for the PWM controller. Output

voltage range is 0.6 to 5V, with output voltages greater than

5V supported using additional components.

• Automatic restart on fault shutdown

• Over-voltage and under-voltage

• TC compensated R_DS(ON)sensed current limit

• Thermal shutdown

• Smart power-save

• Pre-bias start-up



Capacitor types: SP, POSCAP, OSCON, and ceramic

Package — 3 x 3(mm), 20-pin MLPQ

Lead-free and halogen-free

RoHS and WEEE compliant

AEC-Q100 Qualiﬁed available in SC508A

The input voltage can range from 5V to 46V. The wide

input voltage range, programmable frequency, and inte-

grated 5V LDO make the device extremely ﬂexible and

easy to use in a broad range of applications. Support is

provided for multi-cell battery systems in addition to tra-

ditional DC power supply applications.

Applications



Oﬃce automation and computing

Networking and telecommunication equipment

Point-of-load power supplies and module replacement

Automotive applications

Typical Application Circuit

VEXT or VLDO

VIN

PGOOD

ENABLE

SC508

SC508A

CIN

ENL

ENABLE LDO

RTON

VOUT

TON

VDDA

VDDP

3.3O

RLIM

COUT

BST

ILIM

VEXT or VLDO

0.1µF

1µF

VLDO

VOUT

VLDO

1µF

10nF

PSV

AGND

PGND

PSV

Revision 4.1

12 3 4 5 6 7...32

中文翻译

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与SC508A相关器件

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