8

FN9110.6

March 5, 2008

Undervoltage Hysteresis Voltage

20

50

100

mV

UV Bias Current

-1.0

-

1.0

µA

OV Bias Current

-1.0

-

1.0

µA

THERMAL PROTECTION

Thermal Shutdown

(Note 5)

120

130

140

°C

Thermal Shutdown Clear

(Note 5)

105

120

135

°C

Hysteresis

(Note 5)

-

10

-

°C

NOTES:

3. Specifications at -40°C and +105°C are guaranteed by +25°C test with margin limits.

5. Limits should be considered typical and are not production tested.

6. This is the maximum duty cycle achievable using the specified values of RT and CT. Larger or smaller maximum duty cycles may be obtained

using other values for RT and CT. See Equations 1, 2, 3 and 4.

Electrical Specifications

Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Typical Performance Curves

FIGURE 1. EA REFERENCE VOLTAGE vs TEMPERATURE

FIGURE 2. VREF REFERENCE VOLTAGE vs TEMPERATURE

FIGURE 3. OSCILLATOR FREQUENCY vs TEMPERATURE

FIGURE 4. RESISTANCE FOR CT CAPACITOR VALUES GIVEN

0.991

0.993

0.995

0.998

1

1.002

TEMPERATURE (°C)

-40

-10

20

50

80

110

1.002

1.000

0.998

0.995

0.993

0.991

0.991

0.993

0.995

0.998

1

1.002

1.002

1.000

0.998

0.995

0.993

0.991

-10

20

50

80

110

-40

TEMPERATURE (°C)

1.002

0.996

0.989

0.983

0.976

0.970

-10

205080

110

-40

TEMPERATURE (°C)

10

20

40

50

60

70

80

90 100

10

100

RT (k

Ω)

30

100pF

220pF

330pF

470pF

680pF

1000pF

2000pF

ISL6721