Rev. 1.00

3

September 02, 2011

HT7466

Absolute Maximum Ratings

MaximumInputSupplyVoltage............................26V

SwitchNodeVoltage..............................................26V

FeedbackVoltage.....................................................6V

ENVoltage...............................................................6V

CompVoltage...........................................................6V

SSVoltage................................................................6V

MaximumJunctionTemperature....................... 150°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder“AbsoluteMaximumRatings”

maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyond

thoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffect

devicereliability.

Recommended Operating Conditions

InputSupplyVoltage................................4.75V~24V

AmbientTemperatureRange............... -40°C~+85°C

Electrical Characteristics

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Feedback Voltage

1.194

1.222

1.250

V

Under Voltage Lockout Threshold

—

—

4.1

—

V

—

Under Voltage Lockout Threshold Hysteresis

—

—

200

—

mV

Quiescent Current

—

1.0

1.2

mA

Shutdown Supply Current

—

20

30

m

A

Oscillator Frequency

—

—

380

—

kHz

—

Short Circuit Frequency

20

35

50

kHz

Maximum Duty Cycle

—

90

—

%

Upper Switch Leakage

—

0

10

m

A

Switch On Resistance (note 2)

—

95

—

mW

Current Limit

—

—

4.3

—

A

—

Error Amplifier Voltage Gain (note 2)

—

—

70

—

dB

—

Error Amplifier Trans-conductance (note 2)

—

—

800

—

m

A/V

Enable Threshold

0.9

1.0

1.5

V

Thermal Shutdown

—

—

150

—

°C

Note:1.SpecificationsareproductiontestedatTa=roomtemperature.Specificationsoverthe-40°Cto85°C

operatingtemperaturerangeareassuredbydesign,characterizationandcorrelationwithStatistical

QualityControls(SQC).

2.Designertestspecifications.