FAN5250
REV. 1.1.6 3/12/03
5
Electrical Specifications
(VCC = 5V, VIN = 5V–24V, and T
A
= recommended operating ambient temperature range using circuit of Figure 1,
unless otherwise noted)
Parameter Conditions Min. Typ. Max. Units
Power Supplies
VCC Current Operating, C
L
= 10pF 2.7 3.2 mA
Shut-down (EN = 0) 6 30 µA
VIN Current Operating 12 20 µA
Shut-down (EN = 0) 1 µA
UVLO Threshold Rising VCC 4.3 4.65 4.75 V
Falling 4.1 4.35 4.45 V
Regulator / Control Functions
Output Voltage per Table 1. Output
Voltage VID
0.6 1.75 V
Initial Accuracy -1 1 % VID
Static Load Regulation -2 2 % VID
Error Amplifier Gain 86 dB
Error Amplifier GBW 2.7 MHz
Error Amplifier Slew Rate 1 V/µS
ILIM Voltage R
ILIM
= 30K
Ω
0.89 0.91 V
Over-voltage Threshold 1.9 1.95 2.0 V
Over-voltage Protection Delay 1.6 3.2 µS
Under-voltage Shutdown Disabled during VID code
change
72 75 78 % VID
Under-voltage Delay 1.2 1.6 µS
EN, input threshold Logic LOW 1.2 V
Logic HIGH 2 V
Output Drivers
HDRV Output Resistance Sourcing 3.8 5
Ω
Sinking 1.6 3
Ω
LDRV Output Resistance Sourcing 3.8 5
Ω
Sinking 0.8 1.5
Ω
Oscillator
Frequency FREQ = HIGH 255 300 345 KHz
FREQ = LOW 510 600 690 KHz
Ramp Amplitude, pk-pk VIN = 16V 2 V
Ramp Offset 0.5 V
Ramp Gain Ramp amplitude
VIN
125 mV/V
Reference, DAC and Soft-Start
VID input threshold Logic LOW 1.21 V
Logic HIGH 1.62 V
VID pull-up current to internal 2.5V reference 12 µA
DAC output accuracy -1 1 %
