FAN5230 Datasheet, PDF (6/16 Pages) Fairchild Semiconductor – System Electronics Regulator for Mobile PCs

FAN5230
Operating Conditions (Continued)
Recommended Operating Conditions Unless Noted Refers to Block Diagrams
Parameter
Control Functions
SDWN Off Voltage Max.
SDWN On Voltage Min.
Over-temperature Shutdown, t_j
Over-temperature Hysteresis
PGOOD Threshold
PGOOD Sink Current
PGOOD leakage
+5V Analog Softstart
+3.3V Analog Softstart
Soft Start Current
PGOOD Min Pulse Width
Conditions
Min. Typ. Max. Units
800
mV
3
V
150
°C
25
°C
PWM Buck Converters
-14
-11
-8.5 %V_O1
-4
mA
1
µA
Css=100nF
65
msec
Css=100nF
65
msec
5
µA
Note 2
5
10
µs
Notes
1. The minimum input voltage does not include voltage drop in the source supply due to source resistance. It is operating voltage
for static load conditions. To get acceptable load transient performance, the input voltage required will be much higher, in the
7.5 to 8.5 volt range or even higher depending on the severity of dynamic load, source impedance and input and output
capacitance and inductor values. The user should thoroughly test the performance at minimum input voltage using intended
component values and transient loading.
2. Min/Max specifications are guaranteed by design.
6
REV. 2.8.5 10/17/01