UC3844-S08-R datasheet(4/7 Pages) UTC

4 / 7 page

UC3844/45

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 7

www.unisonic.com.tw

QW-R103-010,C

ABSOLUTE MAXIMUM RATINGS (Ta=25°C)

PARAMETER

SYMBOL

RATINGS

UNIT

Total Power Supply and Zener Current

(ICC+Iz)

Output Current, Source or Sink (Note 2)

IOUT

1.0

Output Energy (Capacitive Load per cycle)

5.0

μJ

Current Sense and Voltage feedback Inputs

VIN

-0.3 ~ +5.5

Error Amp Output Sink Current

ISINK

SOP-8

862

Power Dissipation

DIP-8

1250

Junction Temperature

+150

°C

Operation Temperature Range

TOPR

0 ~ 70

°C

Storage Temperature Range

TSTG

-65 ~ +150

°C

Note:1.Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2.Maxmum package power dissipation limits must be observed.

THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

SOP-8

145

°C/W

Thermal Resistance(Junction-to-Air)

DIP-8

θJA

100

°C/W

ELECTRICAL CHARACTERISTICS

(Ta=25

°C, VCC=15V, RT=10k, CT=3.3nF, 0°C ≤ TA ≤ 70°C, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

REFERENCE SECTION

Reference Output Voltage

VREF

IOUT=1.0mA,TJ=25 C

4.9

5.0

5.1

Line Regulation

△

VOUT

VCC=12V ~ 25V

2.0

Load Regulation

△

VOUT

IOUT=1.0mA ~ 20mA

3.0

Temperature Stability

0.2

mV/

°C

Total Output Variation over Line,

Load, Temperature

VREF

4.82

5.18

Output Noise Voltage

f=10Hz ~ kHz, TJ=25°C

μV

Long Term Stability

TA=125°C for 1000 Hours

Output Short Circuit Current

ISC

-30

-85

-180

OSCILLATOR SECTION

Oscillator Voltage Swing

VOSC

1.6

Discharge Current

IDSG

VOSC=2.0V, TJ=25

°C

10.8

TJ=25°C,

Frequency

fOSC

°C

≤ TA ≤ 70°C

kHz

Frequency Change with Voltage

ΔfOSC/ΔV

VCC=12V ~ 25V

0.2

1.0

Frequency Change with Temperature

ΔfOSC/ΔT

°C

≤ TA ≤ 70°C

5.0

ERROR AMPLIFIER SECTION

Voltage Feedback Input

VFB

VOUT=2.5V

2.42

2.50

2.58

High

VOH

RL=15k to ground, VFB=2.3V

5.0

6.2

Output Voltage Swing

Low

VOL

RL=15k to VREF, VFB=2.7V

0.8

1.1

Sink

ISINK

VOUT=1.1V, VFB=2.7V

2.0

Output Current

Source

ISOURCE

VOUT=5.0V, VFB=2.3V

-0.5

-1.0

Input Bias Current

II(BIAS)

VFB=2.7V

-0.1

-2.0

μA

Open Loop Voltage Gain

GVO

VOUT=2.0V ~ 4.0V

Power Supply Rejection Ratio

PSRR

VCC=12V ~ 25V

Unity Gain Bandwidth

GBW

TJ=25°C

0.7

1.0

MHz

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