FAN5231 Datasheet, PDF (5/17 Pages) Fairchild Semiconductor – Precision Dual PWM Controller And Linear Regulator for Notebook CPUs

FAN5231
Electrical Specifications (Continued)
(Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3)
Parameter
Under-Voltage Shut-Down Level
Under-Voltage Shut Down Delay
Over-Voltage Shut-Down
Over-Voltage Shut Down Delay
Over-Current Comparator
Threshold
Linear Regulator
Output Voltage
Load Regulation
Under-Voltage Shut-Down Level
Current Limit
PWM Controller Error Amplifiers
DC Gain
Gain-Bandwidth Product
Slew Rate
PWM 1 Controller Gate Drivers
Upper Drive Pull-Up Resistance
Upper Drive Pull-Down Resistance
Lower Drive Pull-Up Resistance
Lower Drive Pull-Down Resistance
PWM 2 Controller Gate Drivers
Upper Drive Pull-Up Resistance
Upper Drive Pull-Down Resistance
Lower Drive Pull-Up Resistance
Lower Drive Pull-Down Resistance
Power Good
V_OUT1 Upper Threshold
V_OUT1 Lower Threshold, Falling
Edge
Symbol
V_UV2
T_DOC2
V_OVP2
T_DOV2
I_OC2
Test Condition
Min. Typ. Max Units
1.05 – 1.20 V
– 1.4 – µs
1.65 – 1.80 V
– 2.4 – µs
100 135 170 µA
VOUT3
V_UV3
I_OC3
10mA < I_VOUT3 < 150mA
GBWP
SR
By design
By design
By design
2.5
V
-2.0 – 2.0 %
1.8 – 2.0 %
190 250 340 mA
– 86 – dB
– 2.7 – MHz
– 1 – V/µs
R_1UGPUP
R_1UGPDN
R_1LGPUP
R_1LGPDN
– 68Ω
– 35Ω
– 68Ω
– 0.8 1.5 Ω
R_2UGPUP
R_2UGPDN
R_2LGPUP
R_2LGPDN
– 12 20 Ω
– 6 10 Ω
– 10 20 Ω
– 6 10 Ω
Percent of the voltage defined by the 108 – 114 %
VID code
Percent of the voltage defined by the 85 – 92 %
VID code
V_OUT1 Lower Threshold, Risisng
Edge
V_OUT2 Upper Threshold
V_OUT2 Lower Threshold
V_OUT3 Upper Threshold
V_OUT3 Lower Threshold
PGOOD Voltage Low
PGOOD Leakage Current
Percent of the voltage defined by the 87 – 94 %
VID code
1.60 – 1.75 V
1.30 – 1.45 V
2.65 – 2.85 V
2.15 – 2.35 V
V_PGOOD I_PGOOD = -1.6mA
I_PGlLKG V_PULLUP = 5.0V
– – 0.4 V
– – 1.0 µA
REV. 1.1.1 8/15/01
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