MAX15118 Datasheet, PDF (2/23 Pages) Maxim Integrated Products – High-Efficiency, 18A, Current-Mode Synchronous Step-Down Regulator with Integrated Switches

MAX15118
High-Efficiency, 18A, Current-Mode Synchronous
Step-Down Regulator with Integrated Switches
ABSOLUTE MAXIMUM RATINGS
IN, PGOOD to GND.................................................-0.3V to +6V
EN, COMP, FB, SS/REFIN, GSNS, SKIP,
LX to GND...............................................-0.3V to (V_IN + 0.3V)
LX to GND (for 50ns)........................................-1V to (V_IN + 1V)
LX to GND (for 10ns)........................................-2V to (V_IN + 2V)
BST to LX.................................................................-0.3V to +6V
BST to GND...........................................................-0.3V to +12V
BST to IN..................................................................-0.3V to +6V
LX Continuous Current (Note 1)......................................... Q20A
Output Short-Circuit Duration ...................................Continuous
Continuous Power Dissipation
WLP (derate 81.53mW/NC above +70NC)......................3.26W
Operating Temperature Range........................... -40NC to +85NC
Junction Temperature (Note 2)........................................+110NC
Storage Temperature Range............................ -65NC to +150NC
Bump Reflow Temperature (Note 3)................................+260NC
Note 1: LX has internal clamp diodes to GND and IN. Applications that forward bias these diodes must take care not to exceed
the IC’s package power dissipation limits.
Note 2: Limit the junction temperature to +110NC for continuous operation at maximum output current.
Note 3: The WLP package is constructed using a unique set of package techniques that impose a limit on the thermal profile. The
device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder pro-
files recommended in the industry-standard specification JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection
reflow. Preheating is required. Hand or wave soldering is not allowed.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
DC ELECTRICAL CHARACTERISTICS
(V_IN = 5V, see the Typical Operating Circuits, T_A = -40NC to +85NC. Typical values are at T_A = +25NC, unless otherwise noted.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
IN Voltage Range
IN Supply Current
IN Shutdown Current
IN Undervoltage Lockout
Threshold
V_IN
2.7
5.5
V
I_IN
V_EN = V_IN, V_FB = 0.65V, no switching
4.8
7
mA
I_SHDN V_EN = 0V
0.01
3
FA
V_UVLO V_IN rising, LX starts switching
2.6
2.68
V
IN Undervoltage Lockout
Threshold Hysteresis
V_IN falling, LX stops switching
200
mV
ERROR AMPLIFIER
Transconductance
Voltage Gain
FB Setpoint Voltage
FB Input Bias Current
COMP to Current-Sense
Transconductance
g_M
A_VEA
V_FB
I_FB
g_MC
Over line, load, and temperature
1.2
mS
90
dB
0.594 0.600 0.606
V
-500
+500
nA
150
A/V
COMP Clamp Low Voltage
Slope Compensation Ramp
Amplitude
V_SLOPE
V_FB = 0.65V, V_SS/REFIN = 0.6V
0.97
V
130
mV
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