MAX1945SEUI Maxim Integrated Products, MAX1945SEUI Datasheet - Page 4

• Manufacturer Part Number: MAX1945SEUI
• Description: DC/DC Switching Regulators 1MHz 1% 6A Step-Down PWM
• Manufacturer: Maxim Integrated Products

Specifications of MAX1945SEUI

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1MHz, 1% Accurate, 6A Internal Switch
Step-Down Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V
otherwise noted. Typical values are at +25°C.)
4
LX Minimum Duty Cycle
RMS LX Output Current
FBSEL
FBSEL Input Threshold 1.8V
FBSEL Input Threshold 2.5V
FBSEL Input Current Low
FBSEL Input Current High
CTL1 /CTL2
CTL1/CTL2 Input Threshold
CTL1/CTL2 Input Current
Soft-Start Period
Time from Nominal to Margin
High
Time from Nominal to Margin Low
SYNC
SYNC Capture Range
SYNC Pulse Width
SYNC Input Threshold
SYNC Input Current
SYNCOUT
SYNCOUT Frequency Range
SYNCOUT Output Voltage
IN
_______________________________________________________________________________________
= V
CC
PARAMETER
= V
CTL1
= V
CTL2
= V
DD
= 3.3V, SYNC = GND, FBSEL = High-Z, V
V
V
SYMBOL
f
V
V
t
t
V
V
t
t
SYNCOUT
OH_SYNC
OL_SYNC
I
HIGH_4%
HIGH_9%
I
LOW_4%
LOW_9%
IH_CTL_
t
IH_SYNC
I
IL_CTL_
IL_SYNC
IH_CTL_
I
FBSEL
FBSEL
IL_CTL_
LO,
I
HIGH_
LOW_
IL,
OUT
OUT
I
t
IH
HI
V
Where 1.8V feedback
switches in and out,
V
Where 2.5V feedback
switches in and out,
V
FBSEL = GND
FBSEL = V
V
V
Time required for output to ramp up
+4%
+9%
-4%
-9%
V
V
V
V
V
I
SYNCOUT
IN
CC
CC
IN
CTL1
IN
IN
IN
SYNC
CC
= 2.6V/3.3V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V/3.3V/5.5V
= 2.6V/3.3V/5.5V
= 2.6V to 5.5V
or V
= 0 or 5.5V, V
= ±1mA, V
CTL2
CC
CONDITIONS
= 0 or 5.5V, V
IN
CC
= 5.5V
= 2.6V to 5.5V
IN
FB
SYNC = GND
SYNC = V
FBSEL rising
FBSEL falling
FBSEL rising
FBSEL falling
= 5.5V
= 0.7V, C
CC
REF
= 0.22µF, T
V
V
MIN
0.08
0.22
0.40
250
-50
0.4
2.9
0.4
0.4
0.4
CC
CC
-1
-1
-1
-
-
V
V
V
1000
0.05
0.05
TYP
17.6
0.16
0.14
0.14
0.16
0.95
0.95
160
360
450
8.8
-20
1.0
3.7
1.0
CC
A
CC -
CC
20
= 0°C to +85°C, unless
-
-
V
MAX
0.40
10.5
0.22
0.08
1.2
1.6
4.5
1.2
1.6
CC
+1
+1
+1
50
6
-
UNITS
MHz
MHz
ms
µA
µA
µA
µA
µs
µs
ns
%
A
V
V
V
V
V