FAN5235 Datasheet, PDF (4/15 Pages) Fairchild Semiconductor – System Electronics Regulator for Mobile PCs

FAN5235
ELECTRICAL SPECIFICATIONS
Operating Conditions
Recommended Operating Conditions Unless Noted Refers to Block Diagrams
Parameter
Supply
V_IN Input Supply Voltage
Input Quiescent Current
Input UVLO Threshold
5V and 3.3V Main Regulators
Output Voltage Precision
Oscillator Frequency, f_osc
HSD On-Resistance, pull up
HSD On Resistance pull down
LSD On-Resistance, pull up
LSD On Resistance pull down
HSD On Output, V_CPUMP-V_GS
HSD Off Output, V_GS
LSD On Output, V_5V-Always-V_GS
LSD Off Output, V_GS
Ramp Amplitude, pk-pk
Ramp Offset
Ramp Gain from V_IN
Error Amplifier GBW
Current Limit Threshold
Over Voltage Threshold
Under Voltage Threshold
SDN/SS Full On Voltage Min.
SDN/SS Full Off Voltage Max.
Max Duty Cycle
Min PWM Time
VFB3.3 Input Leakage Current
12V Regulator
Output Voltage Precision
V_FB12
V_FB12 Input Current
Oscillator Frequency (f_osc/3)
Gate Drive On-Resistance
Conditions
(DC loading only) Note 1
H/LSD Open
Stand-by
Shut-down
Rising Vbat
hysteresis
0.1 to 5.5A, 5.4 to 24V
I = 10µA
I = 10µA
I = 10µA
I = 10µA
VIN = 16V
R2, R8 = 1KΩ
2µs delay
2µs delay
(End of Soft Start)
V_5 =4.9 to 5.1V
and Io=0 to 150mA
Note 2
High or Low
Min.
5.4
4.3
-2
255
90
110
70
4.2
40
-2
85
Typ.
1.4
300
<1
4.7
500
300
7
4
6
5
2
0.5
125
3
135
115
75
94
200
55
2.472
100
100
6
Max.
24
3
400
5
5.1
+2
345
12
10
9
8
100
100
100
100
180
120
80
800
70
+2
200
115
12
Units
V
mA
µA
µA
V
mV
%
kHz
Ω
Ω
Ω
Ω
mV
mV
mV
mV
V
V
mV/V
MHz
µA
%VO
%VO
V
mV
%
nsec
µA
%
V
nA
kHz
Ω
4
REV. 1.3.3 1/3/02