Datasheet

(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
*As per JEDEC 51 Standard Multilayer Board.
(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)
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
Output Voltage V
OUT
MAX5090A V
IN
= 6.5V to 76V, I
OUT
= 0 to 2A 3.20 3.3 3.39
VMAX5090B V
IN
= 7.5V to 76V, I
OUT
= 0 to 2A 4.85 5.0 5.15
MAX5090B V
IN
= 7V to 76V, I
OUT
= 0 to 1A 4.85 5.0 5.15
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
Efciency η
MAX5090A V
IN
= 12V, I
OUT
= 1A 80
%MAX5090B V
IN
= 12V, I
OUT
= 1A 88
MAX5090C V
IN
= 12V, V
OUT
= 5V, I
OUT
= 1A 88
Quiescent Supply Current
(Note 2)
I
Q
MAX5090A V
IN
= 6.5V to 28V 310 550
µAMAX5090B V
IN
= 7V to 28V 310 550
MAX5090C V
IN
= 6.5V to 28V 310 550
Quiescent Supply Current
(Note 2)
I
Q
MAX5090A V
IN
= 6.5V to 40V 310 570
µAMAX5090B V
IN
= 7V to 40V 310 570
MAX5090C V
IN
= 6.5V to 40V 310 570
Quiescent Supply Current
(Note 2)
I
Q
MAX5090A V
IN
= 6.5V to 76V 310 650
µA
MAX5090B V
IN
= 7V to 76V 310 650
MAX5090C V
IN
= 6.5V to 76V 310 650
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
Soft-Start ReferenceVoltage V
SS(REF)
1.23 1.46 1.65 V
MAX5090A/B/C 2A, 76V, High-Efciency MAXPower
Step-Down DC-DC Converters
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Absolute Maximum Ratings
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.
Electrical Characteristics