FAN5099 Fairchild Semiconductor, FAN5099 Datasheet - Page 5

• Manufacturer Part Number: FAN5099
• Description: PWM and ULDO Controller Combo
• Manufacturer: Fairchild Semiconductor

FAN5099 Rev. 1.0.1
© 2006 Fairchild Semiconductor Corporation
Electrical Characteristics
Unless otherwise noted, V
The ‘
Reference
Error Amplifier
Gate Drive
V
Supply Current
Under-Voltage Lockout (UVLO)
UVLO(H) Rising V
Soft-Start
Oscillator
Symbol
UVLO(L) Falling V
I
I
ΔV
V
LDOSTART
VCC(SD)
VCC(OP)
GBWP
V
R
R
F
V
R
R
SHUNT
I
S/R
SSOK
VCC
I
I
OSC
•
RAMP
HUP
HDN
REF
LUP
LDN
SS
FB
’ denotes that the specifications apply to the full ambient operating temperature range. See Notes 4 and 5.
Slew Rate
V
V
V
V
V
Hysteresis
Current
LDO Start Threshold
PWM Protection Enable
Threshold
Frequency
Frequency Range
Ramp Amplitude
(Peak-to-Peak)
Minimum ON Time
Reference Voltage
(Measured at FB Pin)
Current Amplifier Reference
(at SW node)
DC Gain
Gain-BW Product
Output Voltage Swing
FB Pin Source Current
HDRV Pull-up Resistor
HDRV Pull-down Resistor
LDRV Pull-up Resistor
LDRV Pull-down Resistor
CC
CC
CC
CC
CC
Current (Quiescent)
Current (Shutdown)
Current (Operating)
Voltage
UVLO Threshold
CC
Parameter
CC
UVLO Threshold
UVLO Threshold
(6)
CC
= 5V, T
A
= 25°C, using circuit in Figure 1.
HDRV, LDRV Open
EN = 0V, V
EN = 5V, V
Q
Sinking 1mA to 100mA at V
Pin
R(T) = 25.5KΩ ± 1%
R(T) = 199KΩ ± 1%
R(T) = Open
R(RAMP) = 330KΩ
F = 200kHz
T
T
10pF across COMP to GND
No Load
Sourcing
Sinking
Sourcing
Sinking
A
A
FET
= 0°C to 70°C
= -40°C to 85°C
= 20nC, F
Conditions
CC
CC
= 5.5V
= 5.0V,
5
SW
= 200kHz
CC
•
•
•
•
•
•
•
•
•
•
•
Min.
240
790
788
2.6
5.5
4.0
3.6
0.5
60
40
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Typ.
4.25
3.75
200
300
200
800
800
160
3.2
0.5
2.2
1.2
0.4
1.8
1.8
1.8
1.2
10
10
80
50
80
25
–
–
8
–
1
Max.
400
360
100
600
810
812
3.8
5.9
4.5
4.0
4.0
15
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–
–
–
–
–
–
–
–
–
–
–
–
3
3
3
2
V/μS.
Unit
MHz
kHz
kHz
kHz
kHz
mA
mA
mV
mV
mV
μA
μA
nS
dB
μA
W
W
W
W
V
V
V
V
V
V
V
V