SP7661 datasheet(3/20 Pages) SIPEX

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Nov3-06 Rev I

SP766 Wide Input Voltage Range 3A, 600kHz Buck Regulator

ELECTRICAL SPECIFICATIONS

SpecificationsareforTAMB =TJ =25°C,andthosedenotedby♦applyoverthefulloperatingrange,-40°C<Tj<125°C.Unless

otherwisespecified:4.5V<Vcc<5.5V,3V<ViN<22V,BST=LX+5V,UVIN=3V,CVCC=1µF,CCOMP=0.1µF,Css=50nF.

PARAMETER

MIN TYP MAX UNITS ♦

CONDITIONS

CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH

RampAmplitude

0.80 1.00

1.20

♦

RAMPOffset

1.7

2.0

2.3

♦

RampoffsetTemperature

Coefficient

-2

mV/

°C

GHMinimumPulseWidth

150

180

♦

MaximumControllable

DutyRatio

♦

MaximumDutyRatio

♦

Validfor20cycles

InternalOscillatorRatio

510

600

690

kHZ

♦

TIMERS: SOFTSTART

SSChargeCurrent:

-6

-0

-4.0

µA

♦

SSDischargeCurrent:

1.0

2.0

3.0

♦

FaultPresent,

SS=0.2V

PROTECTION: SHORT CIRCUIT, OVERCURRENT & THERMAL

ShortCircuitThreshold

Voltage

0.2

0.25

0.3

♦

HiccupTimeout

♦

VfB=0.5V

OvercurrentThreshold

Voltage

MeasuredISP-ISN

ISP,ISNCommonMode

Range

3.6

ThermalShutdown

Temperature

135

145

155

°C

Guaranteedbydesign

ThermalRecovery

Temperature

135

°C

ThermalHysteresis

°C

OUTPUT: POWER STAGE

HighSideSwitchRDSON

mΩ

VGS=4.5V;

IDrAiN=4.1A;

TAMB=25°C

SynchronousLowSide

SwitchRDSON

mΩ

VGS=4.5V;

IDrAiN=4.1A;

TAMB=25°C

MaximumOutput

Current

♦

SP7661 数据表(PDF) 3 Page - Sipex Corporation

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