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FAN5099MX Fiches technique(PDF) 5 Page - Fairchild Semiconductor

No de pièce FAN5099MX
Description  Wide Frequency Synchronous Buck PW & LDO Controller
Download  24 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5099MX Fiches technique(HTML) 5 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5099 Rev. 1.1.5
5
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Electrical Characteristics
Unless otherwise noted, VCC = 5V, TA = 25°C, using the circuit in Figure 1. The ‘•’ denotes that the specifications apply
to the full ambient operating temperature range.(2,3)
Continued on the following page...
Symbols
Parameter
Conditions
Min.
Typ.
Max.
Unit
VCC
Supply Voltage
VCC to GND
4.5
5.0
5.5
V
TA
Ambient Temperature
Commercial
-10
+85
°C
Industrial
-40
+85
°C
TJ
Junction Temperature
+125
°C
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Supply Current
IVCC
VCC Current (Quiescent)
HDRV, LDRV Open
2.6
3.2
3.8
mA
IVCC(SD)
VCC Current (Shutdown)
EN = 0V, VCC = 5.5V
200
400
μA
IVCC(OP)
VCC Current (Operating)
EN = 5V, VCC = 5.0V,
QFET = 20nC, fSW = 200kHz
10
15
mA
VSHUNT
VCC Voltage
(4)
Sinking 1mA to 100mA at VCC Pin
5.4
5.9
V
Under-Voltage Lockout (UVLO)
UVLO(H)
Rising VCC UVLO Threshold
4.00
4.25
4.50
V
UVLO(L)
Falling VCC UVLO Threshold
3.60
3.75
4.00
V
VCC UVLO Threshold
Hysteresis
0.5
V
Soft-Start
ISS
Current
10
μA
VLDOSTART LDO Start Threshold
2.2
V
VSSOK
PWM Protection Enable
Threshold
1.2
V
Oscillator
fOSC
Frequency
R(T) = 25.5K
Ω ± 1%
240
300
360
kHz
R(T) = 199K
Ω ± 1%
60
80
100
kHz
R(T) = Open
50
kHz
Operating Frequency Range
40
600
kHz
ΔV
RAMP
Ramp Amplitude
(Peak-to-Peak)
R(RAMP) = 330K
Ω
0.4
V
Minimum On Time
f = 200kHz
200
ns
Reference
VREF
Reference Voltage
(Measured at FB Pin)
TA = 0°C to 70°C
790
800
810
mV
TA = -40°C to 85°C
788
800
812
mV
Current Amplifier Reference
(at SW node)
160
mV


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