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FAN5235 Scheda tecnica(PDF) 4 Page - Fairchild Semiconductor

Il numero della parte FAN5235
Spiegazioni elettronici  System Electronics Regulator for Mobile PCs
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5235 Scheda tecnica(HTML) 4 Page - Fairchild Semiconductor

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FAN5235
4
REV. 1.3.3 1/3/02
ELECTRICAL SPECIFICATIONS
Operating Conditions
Recommended Operating Conditions Unless Noted Refers to Block Diagrams
Parameter
Conditions
Min.
Typ.
Max.
Units
Supply
VIN Input Supply Voltage
(DC loading only) Note 1
5.4
24
V
Input Quiescent Current
H/LSD Open
1.4
3
mA
Stand-by
300
400
µA
Shut-down
<1
5
µA
Input UVLO Threshold
Rising Vbat
4.3
4.7
5.1
V
hysteresis
500
mV
5V and 3.3V Main Regulators
Output Voltage Precision
0.1 to 5.5A, 5.4 to 24V
-2
+2
%
Oscillator Frequency, fosc
255
300
345
kHz
HSD On-Resistance, pull up
7
12
HSD On Resistance pull down
4
10
LSD On-Resistance, pull up
6
9
LSD On Resistance pull down
5
8
HSD On Output, VCPUMP-VGS
I = 10µA
100
mV
HSD Off Output, VGS
I = 10µA
100
mV
LSD On Output, V5V-Always-VGS
I = 10µA
100
mV
LSD Off Output, VGS
I = 10µA
100
mV
Ramp Amplitude, pk-pk
VIN = 16V
2
V
Ramp Offset
0.5
V
Ramp Gain from VIN
125
mV/V
Error Amplifier GBW
3
MHz
Current Limit Threshold
R2, R8 = 1K
90
135
180
µA
Over Voltage Threshold
2µs delay
110
115
120
%VO
Under Voltage Threshold
2µs delay
70
75
80
%VO
SDN/SS Full On Voltage Min.
(End of Soft Start)
4.2
V
SDN/SS Full Off Voltage Max.
800
mV
Max Duty Cycle
94
%
Min PWM Time
200
nsec
VFB3.3 Input Leakage Current
40
55
70
µA
12V Regulator
Output Voltage Precision
V_5 =4.9 to 5.1V
and Io=0 to 150mA
-2
+2
%
VFB12
2.472
V
VFB12 Input Current
Note 2
100
200
nA
Oscillator Frequency (fosc/3)
85
100
115
kHz
Gate Drive On-Resistance
High or Low
6
12


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