Datasheet

MAX15035
15A Step-Down Regulator with Internal Switches
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
IN
= 12V, V
DD
= V
CC
= V
EN
= 5V, REFIN = ILIM = REF, SKIP = GND. T
A
= 0°C to +85°C, unless otherwise spec-
ified. Typical values are at T
A
= +25°C.) (Note 1)
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.
IN to PGND.............................................................-0.3V to +28V
TON to GND ...........................................................-0.3V to +28V
V
DD
to GND..............................................................-0.3V to +6V
V
CC
to GND................................................-0.3V to (V
DD
+ 0.3V)
EN, SKIP, PGOOD to GND.......................................-0.3V to +6V
REF, REFIN to GND....................................-0.3V to (V
CC
+ 0.3V)
ILIM, FB to GND .........................................-0.3V to (V
CC
+ 0.3V)
GND to PGND .......................................................-0.3V to +0.3V
LX to PGND ...............................................................-1V to +28V
BST to PGND...............................................(V
DD
- 0.3V) to +34V
BST to LX..................................................................-0.3V to +6V
BST to V
DD
.............................................................-0.3V to +28V
REF Short Circuit to GND ...........................................Continuous
IN RMS Current Rating (continuous)......................................15A
PGND RMS Current Rating (continuous) ...............................20A
Continuous Power Dissipation (T
A
= +70°C)
40-Pin, 6mm x 6mm Thin QFN (T4066-MCM)
(derate 27mW/°C above +70°C)................................2162mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature Range ..........................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage Range V
IN
4.5 26.0 V
Quiescent Supply Current (V
DD
)I
DD
+ I
CC
FB forced above REFIN 0.7 1.2 mA
Shutdown Supply Current (V
DD
)I
SHDN
EN = GND, T
A
= +25°C 0.1 2 μA
V
CC
Undervoltage Lockout
Threshold
V
U V LO
(
V C C
)
Rising edge, PWM disabled below this
level; hysteresis = 100mV
3.95 4.2 4.45 V
V
DD
-to-V
CC
Resistance R
CC
20 Ω
R
TON
= 97.5kΩ (600kHz) 123 164 205
R
TON
= 200kΩ (300kHz) 275 303 331On-Time t
ON
V
IN
= 12V,
V
FB
= 1.0V
(Note 3)
R
T ON
= 302.5kΩ ( 200kH z) 379 442 505
ns
Minimum Off-Time t
OFF
(
MIN
)
(Note 3) 225 350 ns
TON Shutdown Supply Current
EN = GND, V
TON
= 26V,
V
CC
= 0V or 5V, T
A
= +25°C
0.01 1 μA
REFIN Voltage Range V
REFIN
(Note 2) 0 V
REF
V
REFIN Input Current I
REFIN
T
A
= +25°C, REFIN = 0.5V to 2V -50 +50 nA
FB Voltage Range V
FB
(Note 2) 0 V
REF
V
T
A
= +25°C 0.495 0.5 0.505
V
REFIN
= 0.5V,
m easur ed at FB,
V
I N
= 4.5V to 26V ,
SKIP = V
DD
T
A
= 0°C to +85°C 0.493 0.507
T
A
= +25°C 0.995 1.0 1.005
V
REFIN
= 1.0V
T
A
= 0°C to +85°C 0.993 1.007
FB Voltage Accuracy V
FB
V
REFIN
= 2.0V T
A
= 0°C to +85°C 1.990 2.0 2.010
V
FB Input Bias Current I
FB
V
FB
= 0.5V to 2.0V, T
A
= +25°C -0.1 +0.1 μA
FB Output Low Voltage I
SINK
= 3mA 0.4 V
Load-Regulation Error SKIP = V
DD
0.1 %
Line-Regulation Error V
CC
= 4.5V to 5.5V, V
IN
= 4.5V to 26V 0.2 %