5

FN6352.1

October 18, 2006

Absolute Maximum Ratings

Supply Voltage, VCC, PVCC . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V

Input, Output, or I/O Voltage . . . . . . . . . GND - 0.3V to VCC + 0.3V

Recommended Operating Conditions

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . +4.9V to +5.5V

Ambient Temperature. . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Junction Temperature Range. . . . . . . . . . . . . . . . . .-40°C to +125°C

Thermal Information

Thermal Resistance

QFN Package (Notes 1, 2). . . . . . . . . .

43

7

Maximum Junction Temperature (Note 3) . . . . . . . . . . . . . . . +150°C

Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . +300°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

150°C max junction temperature is intended for short periods of time to prevent shortening the lifetime. Operation close to 150°C junction may trigger the shutdown of

the device even before 150°C since this number is specified as typical.

NOTES:

1.

Tech Brief TB379.

2. For

3. Operation with die temperatures between +125°C and +150°C can be tolerated for short periods of time, however, in order to maximize the

operating life of the IC, it is strongly recommended that the effective continuous operating junction temperature of the die should not exceed

+125°C.

Electrical Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

BIAS SUPPLY AND INTERNAL OSCILLATOR

Input Bias Supply Current

7.6

9

mA

Rising VCC POR (Power-On Reset) Threshold

4.30

4.40

4.50

V

VCC POR Hysteresis

0.46

0.51

0.58

V

Rising PVCC POR Threshold

3.60

3.67

3.75

V

Shunt Regulation

4.90

5.10

5.35

V

Maximum Shunt Current

120

mA

Switching Frequency (per channel; Note 5)

150

2000

kHz

Frequency Tolerance

-10

10

%

Oscillator Peak-to-Peak Ramp Amplitude

1.4

V

Maximum Duty Cycle

66

%

CONTROL THRESHOLDS

EN Threshold

0.65

V

EN Hysteresis Current

20

µA

VMON Power-Good Enable Threshold

290

305

320

mV

VMON Hysteresis Current

10

µA

SOFT-START

SS Current

22

µA

SS Ramp Amplitude

0.55

3.60

V

SS Threshold for Output Gates Turn-Off

0.40

V

REFERENCE AND DAC

System Accuracy (Industrial Temp. Range)

-0.8

0.8

%

Internal Reference

0.6

V

ISL8121

ISL8121