Rev. 1.40

3

June 25, 2016

HT77xxSA

Thermal Information

Symbol

Parameter

Package

Max.

Unit

Thermal Resistance (Junction to Ambient)

(Assume no ambient airflow, no heat sink)

SOT89

300

°C/W

TO92

300

°C/W

SOT23

330

°C/W

SOT23-5

320

°C/W

Power Dissipation

SOT89

0.33

W

TO92

0.33

W

SOT23

0.30

W

SOT23-5

0.31

W

Electrical Characteristics

Symbol

Parameter

Test Conditions

Min.

Typ. Max. Unit

Input Voltage

—

—

—

6.0

V

Output Voltage Tolerance

-2.5

—

+2.5

%

Starting Voltage(Fig.1)

—

0.7

0.9

V

Voltage Hold(Fig.1)

—

—

0.7

V

Supply Current (Fig.2)

—

5.0

—

μA

—

13

26

μA

Shutdown Current

CE=GND

—

0.1

—

μA

Current Limit (Fig.1)

650

800

—

mA

500

650

—

mA

CE High Threshold

—

2.0

—

—

V

CE Low Threshold

—

—

0.4

V

LX Leakage Current (Fig.3)

Add 5.5V at VOUT pin, 4V at LX pin.

Measured at LX pin.

—

0.05

—

μA

Oscillator Frequency (Fig.3)

—

500

—

kHz

Oscillator Duty Cycle (Fig.3)

—

80

—

%

η

Efficiency

—

90

—

%

Note:Absolutemaximumratingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.Operating

Ratingsindicateconditionsforwhichthedeviceisintendedtobefunctional,butdonotguaranteespecific

performancelimits.Theguaranteedspecificationsapplyonlyforthetestconditionslisted.

Absolute Maximum Ratings

MaximumInputSupplyVoltage.......................... 6.5V

AmbientTemperatureRange............... -40°Cto85°C

StorageTemperature.......................... -50°Cto125°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder"AbsoluteMaximumRatings"

maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyond

thoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffect

devicereliability.