Manual

MAX5090A/B/C
2A, 76V, High-Efficiency MAXPower Step-Down
DC-DC Converters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under "Absolute Maximum Ratings" may cause 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 maxi-
mum rating conditions for extended periods may affect device reliability.
(Voltages referenced to PGND, unless otherwise specified.)
V
IN
, DRAIN .............................................................-0.3V to +80V
SGND, PGND.………………………………………-0.3V to +0.3V
LX.................................................................-0.8V to (V
IN
+ 0.3V)
BST ...............................................................-0.3V to (V
IN
+ 10V)
BST to LX................................................................-0.3V to +10V
ON/
OFF........................................................-0.3V to (V
IN
+ 0.3V)
VD, SYNC ...............................................................-0.3V to +12V
SS…………………………………………………………-0.3 to +4V
FB
MAX5090A/MAX5090B…………….……… ...….-0.3V to +15V
MAX5090C ................1mA (internally clamped to +2V, -0.3V)
V
OUT
Short-Circuit Duration………………………… ...Continuous
VD Short-Circuit Duration………….............................Continuous
Continuous Power Dissipation (T
A
= +70°C)*
16-Pin TQFN (derate 33.3mW/°C above +70°C) ........2.667W
Operating Junction Temperature Range...........-40°C to +125°C
Storage Temperature Range .........................…-65°C to +150°C
Junction Temperature……...……………………………….+150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V, V
ON/OFF
= +12V, V
SYNC
= 0V, I
OUT
= 0, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at
T
A
= +25°C. See the Typical Operating Circuit.) (Note 1)
*As per JEDEC 51 Standard Multilayer Board.
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Input Voltage Range V
IN
6.5
76.0
V
Undervoltage Lockout UVLO V
IN
rising
5.70 6.17 6.45
V
UVLO Hysteresis
UVLO
HYS
0.5 V
MAX5090A
V
IN
= 6.5V to 76V, I
OUT
= 0 to 2A
3.20
3.3
3.39
MAX5090B
V
IN
= 7.5V to 76V, I
OUT
= 0 to 2A
4.85
5.0
5.15
Output Voltage V
OUT
MAX5090B
V
IN
= 7V to 76V, I
OUT
= 0 to 1A
4.85
5.0
5.15
V
Output Voltage Range V
OUT
MAX5090C only
1.265 11.000
V
Feedback Voltage V
FB
MAX5090C, V
IN
= 6.5V to 76V
1.191 1.228 1.265
V
MAX5090A
V
IN
= 12V, I
OUT
= 1A 80
MAX5090B
V
IN
= 12V, I
OUT
= 1A 88Efficiency η
MAX5090C
V
IN
= 12V, V
OUT
= 5V, I
OUT
= 1A 88
%
MAX5090A
V
IN
= 6.5V to 28V 310
550
MAX5090B
V
IN
= 7V to 28V 310
550
Quiescent Supply Current
(Note 2)
I
Q
MAX5090C
V
IN
= 6.5V to 28V 310
550
µA
MAX5090A
V
IN
= 6.5V to 40V 310
570
MAX5090B
V
IN
= 7V to 40V 310
570
Quiescent Supply Current
(Note 2)
I
Q
MAX5090C
V
IN
= 6.5V to 40V 310
570
µA
MAX5090A
V
IN
= 6.5V to 76V 310
650
MAX5090B
V
IN
= 7V to 76V 310
650
Quiescent Supply Current
(Note 2)
I
Q
MAX5090C
V
IN
= 6.5V to 76V 310
650
µA
Shutdown Current I
SHDN
V
ON/OFF
= 0V, V
IN
= 14V 19 45 µA
SOFT-START
Default Internal Soft-Start
Period
C
SS
= 0 700 µs
Soft-Start Charge Current
I
SS
4.5 10
16.0
µA