© 2006 Fairchild Semiconductor 2006

www.fairchildsemi.com

FAN5033 Rev. 1.0.0

8 of 39

temperature range.

Symbol

Parameter

Conditions

Min. Typ. Max.

Unit

OD Output

Output Voltage Low

•

160

400

mV

Output Voltage High

•

4

5

V

Power Good Comparator

Under-Voltage

Threshold

Relative to Nominal DAC Output

•

-300

-250

-200

mV

Over-Voltage

Threshold

Relative to Nominal DAC Output

•

100

150

200

mV

Output Low Voltage

•

200

300

mV

Start-up

sequence

•

2

ms

VID code

Changing

•

250

µs

Power Good Delay

Time

Power Good

Blanking Time

VID Code Static

•

100

200

ns

Crowbar Trip Point

Relative to Nominal DAC Output

•

100

150

200

mV

Crowbar Reset Point

Relative to FBRTN

•

250

300

350

mV

VID code Change

•

100

250

µs

Crowbar Delay Time

Over-voltage to

PWM going low

Crowbar Blanking

Time

VID Code Static

•

400

ns

PWM Outputs

Output Voltage Low

•

160

400

mV

Output Voltage High

•

4

5

V

Phase Disable Voltage

Applicable to PWM3 pins only. Connect

this pin to VCC to disable the phase.

(3)

V

Input Supply

DC Supply Current

EN = Logic HIGH

•

8

12

mA

UVLO Threshold

•

6.5

6.9

7.3

V

UVLO Hysteresis

•

0.7

0.9

1.1

V

Notes:

1.

All limits at operating temperature extremes are guaranteed by design, characterization, and statistical quality

control.

2.

AC specifications guaranteed by design and characterization; not production tested.

3.

To operate FAN5033 with fewer than three phases, PWM3 should be connected to VCC to disable this phase.

See the “Theory of Operation” section for details.