MAX1945SEUI+T Maxim Integrated Products, MAX1945SEUI+T Datasheet - Page 6

• 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

1MHz, 1% Accurate, 6A Internal Switch
Step-Down Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V
otherwise noted.) (Note 2)
6
FB
FB Regulation Voltage
(Error Amp Only)
Maximum Output Current
FB Voltage Margining Output
(Error Amp Only)
FB Input Resistance
FB Input Bias Current
LX
LX On-Resistance High
LX On-Resistance Low
LX Current-Sense
Transresistance
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
LX Minimum Off-Time
LX Maximum Duty Cycle
IN
_______________________________________________________________________________________
= V
CC
PARAMETER
= V
CTL1
= V
CTL2
= V
DD
= 3.3V, SYNC = GND, FBSEL = High-Z, V
V
SYMBOL
I
I
HIGH_LX
LOW_LX
LEAK_LX
MARGIN_
FB_OUT
R
R
t
V
f
OFF
SW
ON_
ON_
FB
V
V
V
MAX1945R,
V
V
MAX1945S,
V
V
FB to GND, FBSEL = GND, or V
or FBSEL = V
FBSEL = High-Z, V
V
V
V
V
From LX to COMP
Duty cycle =100%,
V
V
CTL1 = CTL2 = GND
V
V
V
COMP
IN
IN
COMP
IN
COMP
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 2.6V to 5.5V
= 3.3V, V
= 2.6V to 5.5V
= 2.6V to 5.5V
= V
= V
= 3.3V
= 2.6V
= 2.6V/3.3V/5.5V
= 5.5V,
= 2.6V/3.3V
= 2.6V/3.3V
= 2.6V/3.3V
BST
BST
= 1V to 2V,
= 1V to 2V,
= 1V to 2V,
- V
- V
OUT
CC
LX
LX
CONDITIONS
, or V
= 3.3V
= 2.6V
= 1.8V, L = 1µH
FB
FB
= 0.7V
= 2.5V
FBSEL = GND
FBSEL = V
FBSEL = High-Z
FB
High side
Low side
V
LX = GND
SYNC = V
SYNC = GND
SYNC = GND
SYNC = V
CTL1 = V
CTL2 = V
CTL1 = GND,
CTL2 = V
CTL1 = V
CTL2 = GND
CTL1 = V
CTL2 = V
CTL1 = GND,
CTL2 = V
CTL1 = V
CTL2 = GND
= 0.7V, C
LX
FB
= 5.5V
= 1.8V,
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
REF
,
,
,
,
= 0.22µF, T
1.773
2.462
0.788
-10.5
-100
MIN
-1.5
-5.5
-1.5
400
2.5
7.5
8.0
0.8
25
43
90
80
-6
6
A
TYP
= -40°C to +85°C, unless
1.827
2.538
0.812
MAX
+1.5
+1.5
10.5
12.8
-2.5
-7.5
100
100
600
180
5.5
0.1
1.2
43
50
43
50
65
-2
UNITS
MHz
kHz
mΩ
mΩ
mΩ
kΩ
µA
µA
ns
%
%
V
A
A