9

FN6504.1

May 28, 2009

THERMAL MONITORING AND FAN CONTROL

TM Input Voltage for VR_FAN Trip

38.7

39.1

39.6

%VCC

TM Input Voltage for VR_FAN Reset

44.6

45.1

45.5

%VCC

TM Input Voltage for VR_HOT Trip

32.9

33.3

33.7

%VCC

TM Input Voltage for VR_HOT Reset

38.7

39.1

39.6

%VCC

Leakage Current of VR_FAN

With external pull-up resistor connected to VCC

-

-

5

µA

VR_FAN Low Voltage

With 1.24k

Ω resistor pull-up to VCC, I

-

-

0.3

V

Leakage Current of VR_HOT

With external pull-up resistor connected to VCC

-

-

5

µA

VR_HOT Low Voltage

With 1.24k

Ω resistor pull-up to VCC, I

-

-

0.3

V

VR READY AND PROTECTION MONITORS

Leakage Current of VR_RDY

With external pull-up resistor connected to VCC

-

-

5

µA

VR_RDY Low Voltage

-

-

0.3

V

Undervoltage Threshold

VDIFF Falling

48

50

52

%VID

VR_RDY Reset Voltage

VDIFF Rising

57

59.6

62

%VID

Overvoltage Protection Threshold

Before valid VID

1.250

1.273

1.300

V

After valid VID, the voltage above VID

138

170

195

mV

Overvoltage Protection Reset Hysteresis

-

100

-

mV

OVP Output Low Voltage

IOVP = 4mA

-

0.106

0.16

V

NOTES:

3. These parts are designed and adjusted for accuracy with all errors in the voltage loop included.

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

5. During soft-start, VDAC rises from 0 to 1.1V first and then ramp to VID voltage after receiving valid VID input.

6. Soft-start ramp rate is determined by the adjustable soft-start oscillator frequency at the speed of 6.25mV per cycle.

Electrical Specifications

Operating Conditions: VCC = 5V, Unless Otherwise Specified. Parameters with MIN and/or MAX limits are 100%

tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not

production tested. (Continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL6336, ISL6336A