FAN5240 Datasheet, PDF (5/19 Pages) Fairchild Semiconductor – Multi-Phase PWM Controller for AMD Mobile Athlon TM and Duron TM

PRODUCT SPECIFICATION
FAN5240
Electrical Specifications
(VCC = 5V, VIN = 6V–24V, and TA = recommended operating ambient temperature range using circuit of Figure 1,
unless otherwise noted.)
Parameter
Conditions
Min. Typ. Max. Units
Power Supplies
VCC Current
Operating, CL = 10pF
2
mA
Shut-down (EN=0)
1
10
µA
VIN Current
Operating
25
µA
Shut-down (EN=0)
1
µA
UVLO Threshold
Rising VCC
4.3 4.45 4.6
V
Falling VCC
3.8 3.95 4.10
V
Regulator / Control Functions
Output voltage
per Table 2
0.925
2.00
V
Error Amplifier Gain
86
dB
Error Amplifier GBW
2.7
MHz
Error Amplifier Slew Rate
1
V/µS
VCORE+ Input Current
25
30
35
µA
ILIM Voltage
RILIM = 30KΩ
0.89
0.91
V
ILIM THOLDOFF
CDELAY = 22nF
1.16
mS
Over-voltage Threshold
2.2 2.35 2.5
V
Over-voltage Protection delay
2
µS
EN, input threshold
Logic LOW
0.8
V
Logic HIGH
2
V
Phase to Phase current mismatch IC contribution only
Guaranteed by design
±5
%
Over-Temperature Shut-down
150
°C
Over-Temperature Hysteresis
25
°C
Output Drivers (note 1)
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
255 300 345 KHz
Ramp Amplitude, pk–pk
VIN = 16V
2
V
Ramp Offset
0.5
V
Ramp Gain
Reference, DAC and Soft-Start
R_-----a_----m_-----p_----A_-V---m_--I-N---p_---l_--i_--t_--u_---d_----e_--
125
mV/V
VID input threshold
Logic LOW
0.8
V
Logic HIGH
2.0
V
VID pull-up current
to VCC
1
µA
DAC output accuracy
–1
1
%
Soft Start Charging current (ISS) VSS < 90% of Programmed output
20
27
34
µA
VSS > 90% of Programmed output
350 500
650
µA
Note 1: Guaranteed by slew rate testing.
REV. 1.1.7 8/29/02
5