M
5A/2A S tep-Down, PWM,
S witc h-Mode DC-DC Regulators
2
_______________________________________________________________________________________
Input Voltage..........................................................................45V
Switch Voltage with Respect to Input Voltage .......................50V
Switch Voltage with Respect to Ground Pin (V
SW
negative)
(Note 1) ..............................................................................35V
Feedback Pin Voltage ...............................................-0.3V, +10V
Operating Temperature Ranges
MXL1074CT/MXL1076CT ...................................0°C to +70°C
MXL1074ET/MXL1076ET.................................-40°C to +85°C
J unction Temperature Ranges
MXL1074CT/MXL1076CT .................................0°C to +125°C
MXL1074ET/MXL1076ET...............................-40°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 25V, T
j
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
5.5
6.5
8.5
MXL1074
Switch-Current Limit (Note 5)
3.5
5.0
Minimum Supply Voltage
3.5
4.8
V
7.3
8.0
Normal Mode
mA
8.5
11
Supply Current (Note 3)
MIN
TYP
MAX
CONDITIONS
PARAMETER
A
2
2.6
3.2
MXL1076
UNITS
V
FB
= 2.5V, V
IN
≤
40V
0.03
0.1
20
V
FB
= grounded through 2k
(Note 5)
Switching Frequency
85
120
kHz
90
100
110
%
85
90
Maximum Duty Cycle
T
j
= +25°C
T
j
≤
+125°C
T
j
= +25°C
8V
≤
V
IN
≤
40V
Switching Frequency Line
Regulation
%/V
ABSOLUTE MAXIMUM RATINGS
V
8.0
40.0
Input Supply Voltage Range
Start-Up Mode (Note 4)
T
j
≥
0°C
T
j
< 0°C
MXL1076
MXL1074
1.7
I
SW=
2A
V
IN
≤
25V, V
SW
= 0V
1.2
I
SW=
0.5A
2.50
T
j
< 0°C
2.30
T
j
≥
0°C
I
SW
= 5A
2.10
T
j
< 0°C
V
1.85
T
j
≥
0°C
I
SW
= 1A
Switch-On Voltage (Note 2)
MXL1076
MXL1074
250
T
j
= +25°C
V
IN
= 40V, V
SW
= 0V
150
T
j
= +25°C
V
IN
≤
25V, V
SW
= 0V
10
500
T
j
= +25°C
V
IN
= 40V, V
SW
= 0V
μA
5
300
T
j
= +25°C
Switch-Off Leakage