MAX1945SEUI+T Maxim Integrated Products, MAX1945SEUI+T Datasheet - Page 7

• Manufacturer Part Number: MAX1945SEUI+T
• Description: IC REG STP DWN 6A 28-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1945SEUI+T

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.8V, 2.5V, Adj
• Current - Output: 6A
• Frequency - Switching: 1MHz
• Voltage - Input: 2.6 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Power - Output: 1.19W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
otherwise noted.) (Note 2)
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
Note 3: When connected together, the LX output is designed to provide 6A RMS current.
LX Minimum Duty Cycle
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
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
_______________________________________________________________________________________
1MHz, 1% Accurate, 6A Internal Switch
CTL2
= V
DD
= 3.3V, SYNC = GND, FBSEL = High-Z, V
SYMBOL
f
V
V
SYNCOUT
SYNCOUT
V
V
SYNCOUT
I
I
IH_CTL_
IL_CTL_
IH_SYNC
I
IL_SYNC
I
IH_CTL_
I
FBSEL
FBSEL
IL_CTL_
V
HIGH_
V
LOW_
IL,
OH_
OL_
I
IH
SYNC = GND,
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
V
V
V
V
V
I
SYNCOUT
IN
CC
CC
IN
CTL1
IN
IN
IN
SYNC
CC
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V to 5.5V
= 2.6V/3.3V
= 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
Step-Down Regulators
= 5.5V
= 2.6V to 5.5V
FB
IN
FBSEL rising
FBSEL falling
FBSEL rising
FBSEL falling
= 0.7V, C
= 5.5V
REF
= 0.22µF, T
V
V
0.08
0.22
MIN
250
-50
0.4
2.9
0.4
0.4
0.4
0.4
CC
CC
-1
-1
-1
-
-
A
TYP
= -40°C to +85°C, unless
V
MAX
10.5
0.22
0.08
1.6
4.5
1.2
1.6
1.2
0.4
CC
+1
+1
+1
50
-
UNITS
MHz
MHz
µA
µA
µA
ms
ns
µA
%
V
V
V
V
V
7