MAX15020 Datasheet, PDF (2/19 Pages) Maxim Integrated Products – 2A, 40V Step-Down DC-DC Converter with Dynamic Output-Voltage Programming

2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
ABSOLUTE MAXIMUM RATINGS
IN, ON/OFF to GND........…. ...................................-0.3V to +45V
LX to GND................................................-0.715V to (V_IN + 0.3V)
BST to GND ..................................................-0.3V to (V_IN + 12V)
BST to LX................................................................-0.3V to +12V
PGND, EP to GND .................................................-0.3V to +0.3V
REG, DVREG, SYNC to GND .................................-0.3V to +12V
FB, COMP, FSEL, REFIN, REFOUT,
SS to GND .............................................-0.3V to (V_REG + 0.3V)
Continuous Current through Internal Power MOSFET
T_J = +125°C..........................................................................4A
T_J = +150°C.......................................................................2.7A
Continuous Power Dissipation (T_A = +70°C)
20-Pin Thin QFN, single-layer board (5mm x 5mm)
(derate 21.3mW/°C above +70°C) ...........................1702.1mW
20-Pin Thin QFN, multilayer board (5mm x 5mm)
(derate 34.5mW/°C above +70°C) ...........................2758.6mW
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range ............................-60°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
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
(V_IN = 36V, V_REG = V_DVREG, V_PGND = V_GND = V_EP = 0V, V_SYNC = 0V, C_REFOUT = 0.1µF, T_A = T_J = -40°C to +125°C, FSEL = REG,
unless otherwise noted. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Input Voltage Range
UVLO Rising Threshold
UVLO Falling Threshold
UVLO Hysteresis
Quiescent Supply Current
Switching Supply Current
Shutdown Current
ON/OFF CONTROL
V_IN
UVLO_RISING
UVLO_FALLING
UVLO_HYST
V_IN = 40V, V_FB = 1.3V
V_IN = 40V, V_FB = 0V
I_SHDN
V_ON/OFF = 0.2V, V_IN = 40V
Input-Voltage Threshold
V_ON/OFF V_ON/OFF rising
Input-Voltage Threshold
Hysteresis
Input Bias Current
Shutdown Threshold Voltage
V_SD
INTERNAL VOLTAGE REGULATOR (REG)
V_ON/OFF = 0V to V_IN
Output Voltage
OSCILLATOR
I_REG = 0 to 20mA
Frequency
Maximum Duty Cycle
SYNC/FSEL High-Level Voltage
f_SW
D_MAX
V_FSEL = 0V
V_FSEL = V_REG
V_FSEL = 0V
V_FSEL = V_REG
SYNC/FSEL Low-Level Voltage
SYNC Frequency Range
f_SYNC
V_FSEL = V_REG
MIN TYP MAX UNITS
7.5
40.0
V
6.80 7.20 7.45
V
6.0
6.5
7.0
V
0.7
V
1.6
2.8
mA
14.5
mA
6
15
µA
1.200 1.225 1.270
V
120
mV
-250
+250
nA
0.2
V
7.1
8.3
V
450
550
kHz
270
330
85
%
90
2
V
0.8
V
100
550
kHz
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