Preliminary
January 2006
Electrical Characteristics
NOTE: VIN=3.3V over operating temperature range unless otherwise noted. Typical values are at TA = 25°C.
PARAMETER
Operating Input
Voltage
Shut-Down Supply
Current
Switching
Frequency
Thermal Overload
Trip Point
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNITS
VIN
2.375
5.5
V
µA
IS
FOSC
TJ
ENABLE=0V
1
5
MHz
°C
160
VOUT
Vin-
0.6
Range
VOUT
Using external voltage divider
0.8
V
Accuracy
Line Regulation
Load Regulation
Temperature
Regulation
VOUT
Over line, load and temperature
VIN = 2.5 to 5.0 volts
ILOAD = 0 to 6A
TA= 0 to 70ºC
TA= -40 to 85ºC
2.0
%
3
3
TBD
TBD
mV
mV
mV
mV
∆VOUT
∆VOUT
∆VOUT
∆VOUT
Transient Response (IOUT = 0% to 100% or 100% to 0% of Rated Load, slew rate = TBD A/µsec)
Peak Deviation
Maximum Continuous Output Current
Output Current
VOUT
VIN = 5V, 1.2V < VOUT < 3.3V
3
5
%
A
IOUT
6
Enable Operation
Max voltage to ensure the converter
is disabled
2.375V ≤ VIN ≤ 5.5V
5.5V < VIN
Disable Threshold
Enable Threshold
VDISABLE
VENABLE
0.8
V
V
1.8
2.0
Voltage Select Operation
Logic Low
Threshold
VSX-Low
Threshold voltage for Logic Low
0.8
V
V
Threshold voltage for Logic High
(internally pulled high; can be left
floating to achieve logic high)
Logic High
Threshold
VSX-High
1.8
VIN
Power OK Operation
POK low voltage
Max POK Voltage
Parallel Operation
VPOK
VPOK
0.4
5.5
V
V
With 2 – 4 converters in parallel, the
difference between any 2 parts. ∆VIN
< 50mV; RTRACE < 10mΩ.
Current Balance
+/-10
%
∆IOUT
Theory of Operation
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